Abstract

We present for the first time to the best of our knowledge an all-fiber thulium (Tm) and erbium (Er) doped fiber laser simultaneously mode-locked by a common graphene saturable absorber. The laser consists of two ring resonators combined with a common saturable absorber (SA). The generated optical solitons have a full width at half maximum (FWHM) of 3.9 nm and 4.2 nm for Tm- and Er-doped laser, respectively. The used graphene layers were grown on copper foils by chemical vapor deposition (CVD) and transferred onto the fiber connector end. Broadband and flat absorption spectrum of used SA supports mode-locked operation at 1565 nm and 1944 nm. The repetition frequency of the resonator with Er-doped fiber was 20.19 MHz while the Tm-doped resonator was around 1 m longer and resulted with repetition rate of 18.43 MHz. The reported experiment unambiguously confirms one of the biggest advantage of the carbon nanomaterial (in this case graphene) SAs over semiconductor saturable absorption mirrors (SESAM), which is broadband operation range, allowing to mode-lock two lasers spectrally separated by almost 400 nm.

© 2013 OSA

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2013 (2)

Q. Wang, T. Chen, B. Zhang, M. Li, Y. Lu, and K. P. Chen, “All-fiber passively mode-locked thulium-doped fiber ring laser using optically deposited graphene saturable absorbers,” Appl. Phys. Lett.102(13), 131117 (2013).
[CrossRef]

M. N. Cizmeciyan, J. W. Kim, S. Bae, B. H. Hong, F. Rotermund, and A. Sennaroglu, “Graphene mode-locked femtosecond Cr:ZnSe laser at 2500 nm,” Opt. Lett.38(3), 341–343 (2013).
[CrossRef] [PubMed]

2012 (11)

I. H. Baek, H. W. Lee, S. Bae, B. H. Hong, Y. H. Ahn, D. I. Yeom, and F. Rotermund, “Efficient mode-locking of sub-70-fs Ti: sapphire laser by graphene saturable absorber,” Appl. Phys. Express5(3), 032701 (2012).
[CrossRef]

G. Sobon, J. Sotor, J. Jagiello, R. Kozinski, K. Librant, M. Zdrojek, L. Lipinska, and K. M. Abramski, “Linearly polarized, Q-switched Er-doped fiber laser based on reduced graphene oxide saturable absorber,” Appl. Phys. Lett.101(24), 241106 (2012).
[CrossRef]

C. Zhao, Y. Zou, Y. Chen, Z. Wang, S. Lu, H. Zhang, S. Wen, and D. Tang, “Wavelength-tunable picosecond soliton fiber laser with Topological Insulator: Bi2Se3 as a mode locker,” Opt. Express20(25), 27888–27895 (2012).
[CrossRef] [PubMed]

C. Zhao, H. Zhang, X. Qi, Y. Chen, Z. Wang, S. Wen, and D. Tang, “Ultra-short pulse generation by a topological insulator based saturable absorber,” Appl. Phys. Lett.101(21), 211106 (2012).
[CrossRef]

C. R. E. Baer, O. H. Heckl, C. J. Saraceno, C. Schriber, C. Kränkel, T. Südmeyer, and U. Keller, “Frontiers in passively mode-locked high-power thin disk laser oscillators,” Opt. Express20(7), 7054–7065 (2012).
[CrossRef] [PubMed]

A. Schmidt, P. Koopmann, G. Huber, P. Fuhrberg, S. Y. Choi, D. I. Yeom, F. Rotermund, V. Petrov, and U. Griebner, “175 fs Tm:Lu2O3 laser at 2.07 µm mode-locked using single-walled carbon nanotubes,” Opt. Express20(5), 5313–5318 (2012).
[CrossRef] [PubMed]

G. Sobon, J. Sotor, I. Pasternak, K. Grodecki, P. Paletko, W. Strupinski, Z. Jankiewicz, and K. M. Abramski, “„Er-Doped Fiber Laser Mode-Locked by CVD-Graphene Saturable Absorber,” J. Lightwave Technol.30(17), 2770–2775 (2012).
[CrossRef]

P. L. Huang, S.-C. Lin, C.-Y. Yeh, H.-H. Kuo, S.-H. Huang, G.-R. Lin, L.-J. Li, C.-Y. Su, and W.-H. Cheng, “Stable mode-locked fiber laser based on CVD fabricated graphene saturable absorber,” Opt. Express20(3), 2460–2465 (2012).
[CrossRef] [PubMed]

M. Zhang, E. J. R. Kelleher, F. Torrisi, Z. Sun, T. Hasan, D. Popa, F. Wang, A. C. Ferrari, S. V. Popov, and J. R. Taylor, “Tm-doped fiber laser mode-locked by graphene-polymer composite,” Opt. Express20(22), 25077–25084 (2012).
[CrossRef] [PubMed]

G. Sobon, J. Sotor, and K. M. Abramski, “Passive harmonic mode-locking in Er-doped fiber laser based on graphene saturable absorber with repetition rates scalable to 2.22 GHz,” Appl. Phys. Lett.100(16), 161109 (2012).
[CrossRef]

J. Sotor, G. Sobon, K. Krzempek, and K. M. Abramski, “Fundamental and harmonic mode-locking in erbium-doped fiber laser based on graphene saturable absorber,” Opt. Commun.285(13-14), 3174–3178 (2012).
[CrossRef]

2011 (7)

Q. Bao, H. Zhang, Z. Ni, Y. Wang, L. Polavarapu, Z. Shen, Q.-H. Xu, D. Tang, and K. P. Loh, “Monolayer graphene as a saturable absorber in a mode-locked laser,” Nano Res.4(3), 297–307 (2011).
[CrossRef]

J. C. Travers, J. Morgenweg, E. D. Obraztsova, A. I. Chernov, E. J. R. Kelleher, and S. V. Popov, “Using the E22 transition of carbon nanotubes for fiber laser mode-locking,” Laser Phys. Lett.8(2), 144–149 (2011).
[CrossRef]

M. Zhang, E. J. R. Kelleher, A. S. Pozharov, E. D. Obraztsova, S. V. Popov, and J. R. Taylor, “Passive synchronization of all-fiber lasers through a common saturable absorber,” Opt. Lett.36(20), 3984–3986 (2011).
[CrossRef] [PubMed]

A. Martinez and S. Yamashita, “Multi-gigahertz repetition rate passively modelocked fiber lasers using carbon nanotubes,” Opt. Express19(7), 6155–6163 (2011).
[CrossRef] [PubMed]

D. Popa, Z. Sun, T. Hasan, F. Torrisi, F. Wang, and A. C. Ferrari, “Graphene Q-switched, tunable fiber laser,” Appl. Phys. Lett.98(7), 073106 (2011).
[CrossRef]

A. Martinez, K. Fuse, and S. Yamashita, “Mechanical exfoliation of graphene for the passive mode-locking of fiber lasers,” Appl. Phys. Lett.99(12), 121107 (2011).
[CrossRef]

W. B. Cho, J. W. Kim, H. W. Lee, S. Bae, B. H. Hong, S. Y. Choi, I. H. Baek, K. Kim, D. I. Yeom, and F. Rotermund, “High-quality, large-area monolayer graphene for efficient bulk laser mode-locking near 1.25 μm,” Opt. Lett.36(20), 4089–4091 (2011).
[CrossRef] [PubMed]

2010 (8)

F. Bonaccorso, Z. Sun, T. Hasan, and A. C. Ferrari, “Graphene photonics and optoelectronics,” Nat. Photonics4(9), 611–622 (2010).
[CrossRef]

Z. Sun, T. Hasan, F. Torrisi, D. Popa, G. Privitera, F. Wang, F. Bonaccorso, D. M. Basko, and A. C. Ferrari, “Graphene mode-locked ultrafast laser,” ACS Nano4(2), 803–810 (2010).
[CrossRef] [PubMed]

Z. Sun, D. Popa, T. Hasan, F. Torrisi, F. Wang, E. J. R. Kelleher, J. C. Travers, V. Nicolosi, and A. C. Ferrari, “A stable, wideband tunable, near transform-limited, graphene-mode-locked, ultrafast laser,” Nano Res.3(9), 653–660 (2010).
[CrossRef]

D. Popa, Z. Sun, F. Torrisi, T. Hasan, F. Wang, and A. C. Ferrari, “Sub 200 fs pulse generation from a graphene mode-locked fiber laser,” Appl. Phys. Lett.97(20), 203106 (2010).
[CrossRef]

H. Zhang, D. Y. Tang, L. M. Zhao, Q. L. Bao, K. P. Loh, B. Lin, and S. C. Tjin, “Compact graphene modelocked wavelength-tunable erbium-doped fiber lasers: from all anomalous dispersion to all normal dispersion,” Laser Phys. Lett.7(8), 591–596 (2010).
[CrossRef]

Y. M. Chang, H. Kim, J. H. Lee, and Y. Song, “Multilayered graphene efficiently formed by mechanical exfoliation for nonlinear saturable absorbers in fiber mode-locked lasers,” Appl. Phys. Lett.97(21), 211102 (2010).
[CrossRef]

C. C. Lee, G. Acosta, J. S. Bunch, and T. R. Schibli, “Ultra-short optical pulse generation with single-layer graphene,” J. Nonlinear Opt. Phys.19(04), 767–771 (2010).
[CrossRef]

A. Martinez, K. Fuse, B. Xu, and S. Yamashita, “Optical deposition of graphene and carbon nanotubes in a fiber ferrule for passive mode-locked lasing,” Opt. Express18(22), 23054–23061 (2010).
[CrossRef] [PubMed]

2009 (8)

H. Zhang, D. Y. Tang, L. M. Zhao, Q. L. Bao, and K. P. Loh, “Large energy mode locking of an erbium-doped fiber laser with atomic layer graphene,” Opt. Express17(20), 17630–17635 (2009).
[CrossRef] [PubMed]

H. Zhang, Q. Bao, D. Tang, L. Zhao, and K. Loh, “Large energy soliton erbium-doped fiber laser with a graphene-polymer composite mode locker,” Appl. Phys. Lett.95(14), 141103 (2009).
[CrossRef]

Q. L. Bao, H. Zhang, Y. Wang, Z. H. Ni, Z. X. Shen, K. P. Loh, and D. Y. Tang, “Atomic layer graphene as saturable absorber for ultrafast pulsed laser,” Adv. Funct. Mater.19(19), 3077–3083 (2009).
[CrossRef]

S. Kivistö, T. Hakulinen, A. Kaskela, B. Aitchison, D. P. Brown, A. G. Nasibulin, E. I. Kauppinen, A. Härkönen, and O. G. Okhotnikov, “Carbon nanotube films for ultrafast broadband technology,” Opt. Express17(4), 2358–2363 (2009).
[CrossRef] [PubMed]

Z. Sun, A. G. Rozhin, F. Wang, T. Hasan, D. Popa, W. O’Neill, and A. C. Ferrari, “A compact, high power, ultrafast laser mode-locked by carbon nanotubes,” Appl. Phys. Lett.95(25), 253102 (2009).
[CrossRef]

A. H. Quarterman, K. G. Wilcox, V. Apostolopoulos, Z. Mihoubi, S. P. Elsmere, I. Farrer, D. A. Ritchie, and A. Tropper, “A passively mode-locked external-cavity semiconductor laser emitting 60-fs pulses,” Nat. Photonics3(12), 729–731 (2009).
[CrossRef]

T. Hasan, Z. Sun, F. Wang, F. Bonaccorso, P. H. Tan, A. G. Rozhin, and A. C. Ferrari, “Nanotube–Polymer Composites for Ultrafast Photonics,” Adv. Mater.21(38–39), 3874–3899 (2009).
[CrossRef]

X. Tian, M. Tang, P. P. Shum, Y. Gong, C. Lin, S. Fu, and T. Zhang, “High-energy laser pulse with a submegahertz repetition rate from a passively mode-locked fiber laser,” Opt. Lett.34(9), 1432–1434 (2009).
[CrossRef] [PubMed]

2008 (3)

2007 (1)

D. Graf, F. Molitor, K. Ensslin, C. Stampfer, A. Jungen, C. Hierold, and L. Wirtz, “Spatially resolved Raman spectroscopy of single- and few-layer graphene,” Nano Lett.7(2), 238–242 (2007).
[CrossRef] [PubMed]

2006 (2)

A. C. Ferrari, J. C. Meyer, V. Scardaci, C. Casiraghi, M. Lazzeri, F. Mauri, S. Piscanec, D. Jiang, K. S. Novoselov, S. Roth, and A. K. Geim, “Raman spectrum of graphene and graphene layers,” Phys. Rev. Lett.97(18), 187401 (2006).
[CrossRef] [PubMed]

U. Keller and A. C. Tropper, “Passively mode-locked surface-emitting semiconductor lasers,” Phys. Rep.429(2), 67–120 (2006).
[CrossRef]

2005 (1)

G. J. Spühler, K. J. Weingarten, R. Grange, L. Krainer, M. Haiml, V. Liverini, M. Golling, S. Schon, and U. Keller, “Semiconductor saturable absorber mirror structure with low saturation fluence,” Appl. Phys. B81(1), 23–27 (2005).
[CrossRef]

2004 (2)

L. A. Gomes, L. Orsila, T. Jouhti, and O. Okhotnikov, “Picosecond SESAM-Based ytterbium mode-locked fiber lasers,” IEEE J. Sel. Top. Quantum Electron.10(1), 129–136 (2004).
[CrossRef]

S. Set, H. Yaguchi, Y. Tanaka, and M. Jablonski, “Laser mode locking using a saturable absorber incorporating carbon nanotubes,” J. Lightwave Technol.22(1), 51–56 (2004).
[CrossRef]

1999 (1)

H. Kataura, Y. Kumazawa, Y. Maniwa, I. Umezu, S. Suzuki, Y. Ohtsuka, and Y. Achiba, “Optical Properties of Single-Wall Carbon Nanotubes,” Synth. Met.103(1-3), 2555–2558 (1999).
[CrossRef]

1996 (1)

U. Keller, K. J. Weingarten, F. X. Kartner, D. Kopf, B. Braun, I. D. Jung, R. Fluck, C. Honninger, N. Matuschek, and J. Aus der Au, “Semiconductor Saturable Absorber Mirrors (SESAMs) for femtosecond to nanosecond pulse generation in solid-state lasers,” IEEE J. Sel. Top. Quantum Electron.2(3), 435–453 (1996).
[CrossRef]

1992 (1)

Abramski, K. M.

G. Sobon, J. Sotor, I. Pasternak, K. Grodecki, P. Paletko, W. Strupinski, Z. Jankiewicz, and K. M. Abramski, “„Er-Doped Fiber Laser Mode-Locked by CVD-Graphene Saturable Absorber,” J. Lightwave Technol.30(17), 2770–2775 (2012).
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G. Sobon, J. Sotor, and K. M. Abramski, “Passive harmonic mode-locking in Er-doped fiber laser based on graphene saturable absorber with repetition rates scalable to 2.22 GHz,” Appl. Phys. Lett.100(16), 161109 (2012).
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J. Sotor, G. Sobon, K. Krzempek, and K. M. Abramski, “Fundamental and harmonic mode-locking in erbium-doped fiber laser based on graphene saturable absorber,” Opt. Commun.285(13-14), 3174–3178 (2012).
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G. Sobon, J. Sotor, J. Jagiello, R. Kozinski, K. Librant, M. Zdrojek, L. Lipinska, and K. M. Abramski, “Linearly polarized, Q-switched Er-doped fiber laser based on reduced graphene oxide saturable absorber,” Appl. Phys. Lett.101(24), 241106 (2012).
[CrossRef]

Achiba, Y.

H. Kataura, Y. Kumazawa, Y. Maniwa, I. Umezu, S. Suzuki, Y. Ohtsuka, and Y. Achiba, “Optical Properties of Single-Wall Carbon Nanotubes,” Synth. Met.103(1-3), 2555–2558 (1999).
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Acosta, G.

C. C. Lee, G. Acosta, J. S. Bunch, and T. R. Schibli, “Ultra-short optical pulse generation with single-layer graphene,” J. Nonlinear Opt. Phys.19(04), 767–771 (2010).
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Ahn, Y. H.

I. H. Baek, H. W. Lee, S. Bae, B. H. Hong, Y. H. Ahn, D. I. Yeom, and F. Rotermund, “Efficient mode-locking of sub-70-fs Ti: sapphire laser by graphene saturable absorber,” Appl. Phys. Express5(3), 032701 (2012).
[CrossRef]

Aitchison, B.

Apostolopoulos, V.

A. H. Quarterman, K. G. Wilcox, V. Apostolopoulos, Z. Mihoubi, S. P. Elsmere, I. Farrer, D. A. Ritchie, and A. Tropper, “A passively mode-locked external-cavity semiconductor laser emitting 60-fs pulses,” Nat. Photonics3(12), 729–731 (2009).
[CrossRef]

Asom, M. T.

Aus der Au, J.

U. Keller, K. J. Weingarten, F. X. Kartner, D. Kopf, B. Braun, I. D. Jung, R. Fluck, C. Honninger, N. Matuschek, and J. Aus der Au, “Semiconductor Saturable Absorber Mirrors (SESAMs) for femtosecond to nanosecond pulse generation in solid-state lasers,” IEEE J. Sel. Top. Quantum Electron.2(3), 435–453 (1996).
[CrossRef]

Bae, S.

Baek, I. H.

I. H. Baek, H. W. Lee, S. Bae, B. H. Hong, Y. H. Ahn, D. I. Yeom, and F. Rotermund, “Efficient mode-locking of sub-70-fs Ti: sapphire laser by graphene saturable absorber,” Appl. Phys. Express5(3), 032701 (2012).
[CrossRef]

W. B. Cho, J. W. Kim, H. W. Lee, S. Bae, B. H. Hong, S. Y. Choi, I. H. Baek, K. Kim, D. I. Yeom, and F. Rotermund, “High-quality, large-area monolayer graphene for efficient bulk laser mode-locking near 1.25 μm,” Opt. Lett.36(20), 4089–4091 (2011).
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Baer, C. R. E.

Bao, Q.

Q. Bao, H. Zhang, Z. Ni, Y. Wang, L. Polavarapu, Z. Shen, Q.-H. Xu, D. Tang, and K. P. Loh, “Monolayer graphene as a saturable absorber in a mode-locked laser,” Nano Res.4(3), 297–307 (2011).
[CrossRef]

H. Zhang, Q. Bao, D. Tang, L. Zhao, and K. Loh, “Large energy soliton erbium-doped fiber laser with a graphene-polymer composite mode locker,” Appl. Phys. Lett.95(14), 141103 (2009).
[CrossRef]

Bao, Q. L.

H. Zhang, D. Y. Tang, L. M. Zhao, Q. L. Bao, K. P. Loh, B. Lin, and S. C. Tjin, “Compact graphene modelocked wavelength-tunable erbium-doped fiber lasers: from all anomalous dispersion to all normal dispersion,” Laser Phys. Lett.7(8), 591–596 (2010).
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H. Zhang, D. Y. Tang, L. M. Zhao, Q. L. Bao, and K. P. Loh, “Large energy mode locking of an erbium-doped fiber laser with atomic layer graphene,” Opt. Express17(20), 17630–17635 (2009).
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Q. L. Bao, H. Zhang, Y. Wang, Z. H. Ni, Z. X. Shen, K. P. Loh, and D. Y. Tang, “Atomic layer graphene as saturable absorber for ultrafast pulsed laser,” Adv. Funct. Mater.19(19), 3077–3083 (2009).
[CrossRef]

Barbarin, Y.

Basko, D. M.

Z. Sun, T. Hasan, F. Torrisi, D. Popa, G. Privitera, F. Wang, F. Bonaccorso, D. M. Basko, and A. C. Ferrari, “Graphene mode-locked ultrafast laser,” ACS Nano4(2), 803–810 (2010).
[CrossRef] [PubMed]

Bellancourt, A.-R.

Blake, P.

R. R. Nair, P. Blake, A. N. Grigorenko, K. S. Novoselov, T. J. Booth, T. Stauber, N. M. R. Peres, and A. K. Geim, “Fine structure constant defines visual transparency of graphene,” Science320(5881), 1308 (2008).
[CrossRef] [PubMed]

Bonaccorso, F.

F. Bonaccorso, Z. Sun, T. Hasan, and A. C. Ferrari, “Graphene photonics and optoelectronics,” Nat. Photonics4(9), 611–622 (2010).
[CrossRef]

Z. Sun, T. Hasan, F. Torrisi, D. Popa, G. Privitera, F. Wang, F. Bonaccorso, D. M. Basko, and A. C. Ferrari, “Graphene mode-locked ultrafast laser,” ACS Nano4(2), 803–810 (2010).
[CrossRef] [PubMed]

T. Hasan, Z. Sun, F. Wang, F. Bonaccorso, P. H. Tan, A. G. Rozhin, and A. C. Ferrari, “Nanotube–Polymer Composites for Ultrafast Photonics,” Adv. Mater.21(38–39), 3874–3899 (2009).
[CrossRef]

Booth, T. J.

R. R. Nair, P. Blake, A. N. Grigorenko, K. S. Novoselov, T. J. Booth, T. Stauber, N. M. R. Peres, and A. K. Geim, “Fine structure constant defines visual transparency of graphene,” Science320(5881), 1308 (2008).
[CrossRef] [PubMed]

Boyd, G. D.

Braun, B.

U. Keller, K. J. Weingarten, F. X. Kartner, D. Kopf, B. Braun, I. D. Jung, R. Fluck, C. Honninger, N. Matuschek, and J. Aus der Au, “Semiconductor Saturable Absorber Mirrors (SESAMs) for femtosecond to nanosecond pulse generation in solid-state lasers,” IEEE J. Sel. Top. Quantum Electron.2(3), 435–453 (1996).
[CrossRef]

Brown, D. P.

Bunch, J. S.

C. C. Lee, G. Acosta, J. S. Bunch, and T. R. Schibli, “Ultra-short optical pulse generation with single-layer graphene,” J. Nonlinear Opt. Phys.19(04), 767–771 (2010).
[CrossRef]

Casiraghi, C.

A. C. Ferrari, J. C. Meyer, V. Scardaci, C. Casiraghi, M. Lazzeri, F. Mauri, S. Piscanec, D. Jiang, K. S. Novoselov, S. Roth, and A. K. Geim, “Raman spectrum of graphene and graphene layers,” Phys. Rev. Lett.97(18), 187401 (2006).
[CrossRef] [PubMed]

Chang, Y. M.

Y. M. Chang, H. Kim, J. H. Lee, and Y. Song, “Multilayered graphene efficiently formed by mechanical exfoliation for nonlinear saturable absorbers in fiber mode-locked lasers,” Appl. Phys. Lett.97(21), 211102 (2010).
[CrossRef]

Chen, K. P.

Q. Wang, T. Chen, B. Zhang, M. Li, Y. Lu, and K. P. Chen, “All-fiber passively mode-locked thulium-doped fiber ring laser using optically deposited graphene saturable absorbers,” Appl. Phys. Lett.102(13), 131117 (2013).
[CrossRef]

Chen, T.

Q. Wang, T. Chen, B. Zhang, M. Li, Y. Lu, and K. P. Chen, “All-fiber passively mode-locked thulium-doped fiber ring laser using optically deposited graphene saturable absorbers,” Appl. Phys. Lett.102(13), 131117 (2013).
[CrossRef]

Chen, Y.

C. Zhao, Y. Zou, Y. Chen, Z. Wang, S. Lu, H. Zhang, S. Wen, and D. Tang, “Wavelength-tunable picosecond soliton fiber laser with Topological Insulator: Bi2Se3 as a mode locker,” Opt. Express20(25), 27888–27895 (2012).
[CrossRef] [PubMed]

C. Zhao, H. Zhang, X. Qi, Y. Chen, Z. Wang, S. Wen, and D. Tang, “Ultra-short pulse generation by a topological insulator based saturable absorber,” Appl. Phys. Lett.101(21), 211106 (2012).
[CrossRef]

Cheng, W.-H.

Chernov, A. I.

J. C. Travers, J. Morgenweg, E. D. Obraztsova, A. I. Chernov, E. J. R. Kelleher, and S. V. Popov, “Using the E22 transition of carbon nanotubes for fiber laser mode-locking,” Laser Phys. Lett.8(2), 144–149 (2011).
[CrossRef]

M. A. Solodyankin, E. D. Obraztsova, A. S. Lobach, A. I. Chernov, A. V. Tausenev, V. I. Konov, and E. M. Dianov, “Mode-locked 1.93 microm thulium fiber laser with a carbon nanotube absorber,” Opt. Lett.33(12), 1336–1338 (2008).
[CrossRef] [PubMed]

Chiu, T. H.

Cho, W. B.

Choi, S. Y.

Cizmeciyan, M. N.

Dianov, E. M.

Elsmere, S. P.

A. H. Quarterman, K. G. Wilcox, V. Apostolopoulos, Z. Mihoubi, S. P. Elsmere, I. Farrer, D. A. Ritchie, and A. Tropper, “A passively mode-locked external-cavity semiconductor laser emitting 60-fs pulses,” Nat. Photonics3(12), 729–731 (2009).
[CrossRef]

Ensslin, K.

D. Graf, F. Molitor, K. Ensslin, C. Stampfer, A. Jungen, C. Hierold, and L. Wirtz, “Spatially resolved Raman spectroscopy of single- and few-layer graphene,” Nano Lett.7(2), 238–242 (2007).
[CrossRef] [PubMed]

Farrer, I.

A. H. Quarterman, K. G. Wilcox, V. Apostolopoulos, Z. Mihoubi, S. P. Elsmere, I. Farrer, D. A. Ritchie, and A. Tropper, “A passively mode-locked external-cavity semiconductor laser emitting 60-fs pulses,” Nat. Photonics3(12), 729–731 (2009).
[CrossRef]

Ferguson, J. F.

Ferrari, A. C.

M. Zhang, E. J. R. Kelleher, F. Torrisi, Z. Sun, T. Hasan, D. Popa, F. Wang, A. C. Ferrari, S. V. Popov, and J. R. Taylor, “Tm-doped fiber laser mode-locked by graphene-polymer composite,” Opt. Express20(22), 25077–25084 (2012).
[CrossRef] [PubMed]

D. Popa, Z. Sun, T. Hasan, F. Torrisi, F. Wang, and A. C. Ferrari, “Graphene Q-switched, tunable fiber laser,” Appl. Phys. Lett.98(7), 073106 (2011).
[CrossRef]

Z. Sun, D. Popa, T. Hasan, F. Torrisi, F. Wang, E. J. R. Kelleher, J. C. Travers, V. Nicolosi, and A. C. Ferrari, “A stable, wideband tunable, near transform-limited, graphene-mode-locked, ultrafast laser,” Nano Res.3(9), 653–660 (2010).
[CrossRef]

D. Popa, Z. Sun, F. Torrisi, T. Hasan, F. Wang, and A. C. Ferrari, “Sub 200 fs pulse generation from a graphene mode-locked fiber laser,” Appl. Phys. Lett.97(20), 203106 (2010).
[CrossRef]

Z. Sun, T. Hasan, F. Torrisi, D. Popa, G. Privitera, F. Wang, F. Bonaccorso, D. M. Basko, and A. C. Ferrari, “Graphene mode-locked ultrafast laser,” ACS Nano4(2), 803–810 (2010).
[CrossRef] [PubMed]

F. Bonaccorso, Z. Sun, T. Hasan, and A. C. Ferrari, “Graphene photonics and optoelectronics,” Nat. Photonics4(9), 611–622 (2010).
[CrossRef]

T. Hasan, Z. Sun, F. Wang, F. Bonaccorso, P. H. Tan, A. G. Rozhin, and A. C. Ferrari, “Nanotube–Polymer Composites for Ultrafast Photonics,” Adv. Mater.21(38–39), 3874–3899 (2009).
[CrossRef]

Z. Sun, A. G. Rozhin, F. Wang, T. Hasan, D. Popa, W. O’Neill, and A. C. Ferrari, “A compact, high power, ultrafast laser mode-locked by carbon nanotubes,” Appl. Phys. Lett.95(25), 253102 (2009).
[CrossRef]

A. C. Ferrari, J. C. Meyer, V. Scardaci, C. Casiraghi, M. Lazzeri, F. Mauri, S. Piscanec, D. Jiang, K. S. Novoselov, S. Roth, and A. K. Geim, “Raman spectrum of graphene and graphene layers,” Phys. Rev. Lett.97(18), 187401 (2006).
[CrossRef] [PubMed]

Fluck, R.

U. Keller, K. J. Weingarten, F. X. Kartner, D. Kopf, B. Braun, I. D. Jung, R. Fluck, C. Honninger, N. Matuschek, and J. Aus der Au, “Semiconductor Saturable Absorber Mirrors (SESAMs) for femtosecond to nanosecond pulse generation in solid-state lasers,” IEEE J. Sel. Top. Quantum Electron.2(3), 435–453 (1996).
[CrossRef]

Fu, S.

Fuhrberg, P.

Fuse, K.

A. Martinez, K. Fuse, and S. Yamashita, “Mechanical exfoliation of graphene for the passive mode-locking of fiber lasers,” Appl. Phys. Lett.99(12), 121107 (2011).
[CrossRef]

A. Martinez, K. Fuse, B. Xu, and S. Yamashita, “Optical deposition of graphene and carbon nanotubes in a fiber ferrule for passive mode-locked lasing,” Opt. Express18(22), 23054–23061 (2010).
[CrossRef] [PubMed]

Geim, A. K.

R. R. Nair, P. Blake, A. N. Grigorenko, K. S. Novoselov, T. J. Booth, T. Stauber, N. M. R. Peres, and A. K. Geim, “Fine structure constant defines visual transparency of graphene,” Science320(5881), 1308 (2008).
[CrossRef] [PubMed]

A. C. Ferrari, J. C. Meyer, V. Scardaci, C. Casiraghi, M. Lazzeri, F. Mauri, S. Piscanec, D. Jiang, K. S. Novoselov, S. Roth, and A. K. Geim, “Raman spectrum of graphene and graphene layers,” Phys. Rev. Lett.97(18), 187401 (2006).
[CrossRef] [PubMed]

Golling, M.

D. J. H. C. Maas, A.-R. Bellancourt, M. Hoffmann, B. Rudin, Y. Barbarin, M. Golling, T. Südmeyer, and U. Keller, “Growth parameter optimization for fast quantum dot SESAMs,” Opt. Express16(23), 18646–18656 (2008).
[CrossRef] [PubMed]

G. J. Spühler, K. J. Weingarten, R. Grange, L. Krainer, M. Haiml, V. Liverini, M. Golling, S. Schon, and U. Keller, “Semiconductor saturable absorber mirror structure with low saturation fluence,” Appl. Phys. B81(1), 23–27 (2005).
[CrossRef]

Gomes, L. A.

L. A. Gomes, L. Orsila, T. Jouhti, and O. Okhotnikov, “Picosecond SESAM-Based ytterbium mode-locked fiber lasers,” IEEE J. Sel. Top. Quantum Electron.10(1), 129–136 (2004).
[CrossRef]

Gong, Y.

Graf, D.

D. Graf, F. Molitor, K. Ensslin, C. Stampfer, A. Jungen, C. Hierold, and L. Wirtz, “Spatially resolved Raman spectroscopy of single- and few-layer graphene,” Nano Lett.7(2), 238–242 (2007).
[CrossRef] [PubMed]

Grange, R.

G. J. Spühler, K. J. Weingarten, R. Grange, L. Krainer, M. Haiml, V. Liverini, M. Golling, S. Schon, and U. Keller, “Semiconductor saturable absorber mirror structure with low saturation fluence,” Appl. Phys. B81(1), 23–27 (2005).
[CrossRef]

Griebner, U.

Grigorenko, A. N.

R. R. Nair, P. Blake, A. N. Grigorenko, K. S. Novoselov, T. J. Booth, T. Stauber, N. M. R. Peres, and A. K. Geim, “Fine structure constant defines visual transparency of graphene,” Science320(5881), 1308 (2008).
[CrossRef] [PubMed]

Grodecki, K.

Haiml, M.

G. J. Spühler, K. J. Weingarten, R. Grange, L. Krainer, M. Haiml, V. Liverini, M. Golling, S. Schon, and U. Keller, “Semiconductor saturable absorber mirror structure with low saturation fluence,” Appl. Phys. B81(1), 23–27 (2005).
[CrossRef]

Hakulinen, T.

Härkönen, A.

Hasan, T.

M. Zhang, E. J. R. Kelleher, F. Torrisi, Z. Sun, T. Hasan, D. Popa, F. Wang, A. C. Ferrari, S. V. Popov, and J. R. Taylor, “Tm-doped fiber laser mode-locked by graphene-polymer composite,” Opt. Express20(22), 25077–25084 (2012).
[CrossRef] [PubMed]

D. Popa, Z. Sun, T. Hasan, F. Torrisi, F. Wang, and A. C. Ferrari, “Graphene Q-switched, tunable fiber laser,” Appl. Phys. Lett.98(7), 073106 (2011).
[CrossRef]

D. Popa, Z. Sun, F. Torrisi, T. Hasan, F. Wang, and A. C. Ferrari, “Sub 200 fs pulse generation from a graphene mode-locked fiber laser,” Appl. Phys. Lett.97(20), 203106 (2010).
[CrossRef]

Z. Sun, D. Popa, T. Hasan, F. Torrisi, F. Wang, E. J. R. Kelleher, J. C. Travers, V. Nicolosi, and A. C. Ferrari, “A stable, wideband tunable, near transform-limited, graphene-mode-locked, ultrafast laser,” Nano Res.3(9), 653–660 (2010).
[CrossRef]

Z. Sun, T. Hasan, F. Torrisi, D. Popa, G. Privitera, F. Wang, F. Bonaccorso, D. M. Basko, and A. C. Ferrari, “Graphene mode-locked ultrafast laser,” ACS Nano4(2), 803–810 (2010).
[CrossRef] [PubMed]

F. Bonaccorso, Z. Sun, T. Hasan, and A. C. Ferrari, “Graphene photonics and optoelectronics,” Nat. Photonics4(9), 611–622 (2010).
[CrossRef]

T. Hasan, Z. Sun, F. Wang, F. Bonaccorso, P. H. Tan, A. G. Rozhin, and A. C. Ferrari, “Nanotube–Polymer Composites for Ultrafast Photonics,” Adv. Mater.21(38–39), 3874–3899 (2009).
[CrossRef]

Z. Sun, A. G. Rozhin, F. Wang, T. Hasan, D. Popa, W. O’Neill, and A. C. Ferrari, “A compact, high power, ultrafast laser mode-locked by carbon nanotubes,” Appl. Phys. Lett.95(25), 253102 (2009).
[CrossRef]

Heckl, O. H.

Hierold, C.

D. Graf, F. Molitor, K. Ensslin, C. Stampfer, A. Jungen, C. Hierold, and L. Wirtz, “Spatially resolved Raman spectroscopy of single- and few-layer graphene,” Nano Lett.7(2), 238–242 (2007).
[CrossRef] [PubMed]

Hoffmann, M.

Hong, B. H.

Honninger, C.

U. Keller, K. J. Weingarten, F. X. Kartner, D. Kopf, B. Braun, I. D. Jung, R. Fluck, C. Honninger, N. Matuschek, and J. Aus der Au, “Semiconductor Saturable Absorber Mirrors (SESAMs) for femtosecond to nanosecond pulse generation in solid-state lasers,” IEEE J. Sel. Top. Quantum Electron.2(3), 435–453 (1996).
[CrossRef]

Huang, P. L.

Huang, S.-H.

Huber, G.

Jablonski, M.

Jagiello, J.

G. Sobon, J. Sotor, J. Jagiello, R. Kozinski, K. Librant, M. Zdrojek, L. Lipinska, and K. M. Abramski, “Linearly polarized, Q-switched Er-doped fiber laser based on reduced graphene oxide saturable absorber,” Appl. Phys. Lett.101(24), 241106 (2012).
[CrossRef]

Jankiewicz, Z.

Jiang, D.

A. C. Ferrari, J. C. Meyer, V. Scardaci, C. Casiraghi, M. Lazzeri, F. Mauri, S. Piscanec, D. Jiang, K. S. Novoselov, S. Roth, and A. K. Geim, “Raman spectrum of graphene and graphene layers,” Phys. Rev. Lett.97(18), 187401 (2006).
[CrossRef] [PubMed]

Jouhti, T.

L. A. Gomes, L. Orsila, T. Jouhti, and O. Okhotnikov, “Picosecond SESAM-Based ytterbium mode-locked fiber lasers,” IEEE J. Sel. Top. Quantum Electron.10(1), 129–136 (2004).
[CrossRef]

Jung, I. D.

U. Keller, K. J. Weingarten, F. X. Kartner, D. Kopf, B. Braun, I. D. Jung, R. Fluck, C. Honninger, N. Matuschek, and J. Aus der Au, “Semiconductor Saturable Absorber Mirrors (SESAMs) for femtosecond to nanosecond pulse generation in solid-state lasers,” IEEE J. Sel. Top. Quantum Electron.2(3), 435–453 (1996).
[CrossRef]

Jungen, A.

D. Graf, F. Molitor, K. Ensslin, C. Stampfer, A. Jungen, C. Hierold, and L. Wirtz, “Spatially resolved Raman spectroscopy of single- and few-layer graphene,” Nano Lett.7(2), 238–242 (2007).
[CrossRef] [PubMed]

Kartner, F. X.

U. Keller, K. J. Weingarten, F. X. Kartner, D. Kopf, B. Braun, I. D. Jung, R. Fluck, C. Honninger, N. Matuschek, and J. Aus der Au, “Semiconductor Saturable Absorber Mirrors (SESAMs) for femtosecond to nanosecond pulse generation in solid-state lasers,” IEEE J. Sel. Top. Quantum Electron.2(3), 435–453 (1996).
[CrossRef]

Kaskela, A.

Kataura, H.

H. Kataura, Y. Kumazawa, Y. Maniwa, I. Umezu, S. Suzuki, Y. Ohtsuka, and Y. Achiba, “Optical Properties of Single-Wall Carbon Nanotubes,” Synth. Met.103(1-3), 2555–2558 (1999).
[CrossRef]

Kauppinen, E. I.

Kelleher, E. J. R.

M. Zhang, E. J. R. Kelleher, F. Torrisi, Z. Sun, T. Hasan, D. Popa, F. Wang, A. C. Ferrari, S. V. Popov, and J. R. Taylor, “Tm-doped fiber laser mode-locked by graphene-polymer composite,” Opt. Express20(22), 25077–25084 (2012).
[CrossRef] [PubMed]

J. C. Travers, J. Morgenweg, E. D. Obraztsova, A. I. Chernov, E. J. R. Kelleher, and S. V. Popov, “Using the E22 transition of carbon nanotubes for fiber laser mode-locking,” Laser Phys. Lett.8(2), 144–149 (2011).
[CrossRef]

M. Zhang, E. J. R. Kelleher, A. S. Pozharov, E. D. Obraztsova, S. V. Popov, and J. R. Taylor, “Passive synchronization of all-fiber lasers through a common saturable absorber,” Opt. Lett.36(20), 3984–3986 (2011).
[CrossRef] [PubMed]

Z. Sun, D. Popa, T. Hasan, F. Torrisi, F. Wang, E. J. R. Kelleher, J. C. Travers, V. Nicolosi, and A. C. Ferrari, “A stable, wideband tunable, near transform-limited, graphene-mode-locked, ultrafast laser,” Nano Res.3(9), 653–660 (2010).
[CrossRef]

Keller, U.

C. R. E. Baer, O. H. Heckl, C. J. Saraceno, C. Schriber, C. Kränkel, T. Südmeyer, and U. Keller, “Frontiers in passively mode-locked high-power thin disk laser oscillators,” Opt. Express20(7), 7054–7065 (2012).
[CrossRef] [PubMed]

D. J. H. C. Maas, A.-R. Bellancourt, M. Hoffmann, B. Rudin, Y. Barbarin, M. Golling, T. Südmeyer, and U. Keller, “Growth parameter optimization for fast quantum dot SESAMs,” Opt. Express16(23), 18646–18656 (2008).
[CrossRef] [PubMed]

U. Keller and A. C. Tropper, “Passively mode-locked surface-emitting semiconductor lasers,” Phys. Rep.429(2), 67–120 (2006).
[CrossRef]

G. J. Spühler, K. J. Weingarten, R. Grange, L. Krainer, M. Haiml, V. Liverini, M. Golling, S. Schon, and U. Keller, “Semiconductor saturable absorber mirror structure with low saturation fluence,” Appl. Phys. B81(1), 23–27 (2005).
[CrossRef]

U. Keller, K. J. Weingarten, F. X. Kartner, D. Kopf, B. Braun, I. D. Jung, R. Fluck, C. Honninger, N. Matuschek, and J. Aus der Au, “Semiconductor Saturable Absorber Mirrors (SESAMs) for femtosecond to nanosecond pulse generation in solid-state lasers,” IEEE J. Sel. Top. Quantum Electron.2(3), 435–453 (1996).
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Sobon, G.

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G. Sobon, J. Sotor, J. Jagiello, R. Kozinski, K. Librant, M. Zdrojek, L. Lipinska, and K. M. Abramski, “Linearly polarized, Q-switched Er-doped fiber laser based on reduced graphene oxide saturable absorber,” Appl. Phys. Lett.101(24), 241106 (2012).
[CrossRef]

J. Sotor, G. Sobon, K. Krzempek, and K. M. Abramski, “Fundamental and harmonic mode-locking in erbium-doped fiber laser based on graphene saturable absorber,” Opt. Commun.285(13-14), 3174–3178 (2012).
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G. Sobon, J. Sotor, and K. M. Abramski, “Passive harmonic mode-locking in Er-doped fiber laser based on graphene saturable absorber with repetition rates scalable to 2.22 GHz,” Appl. Phys. Lett.100(16), 161109 (2012).
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Song, Y.

Y. M. Chang, H. Kim, J. H. Lee, and Y. Song, “Multilayered graphene efficiently formed by mechanical exfoliation for nonlinear saturable absorbers in fiber mode-locked lasers,” Appl. Phys. Lett.97(21), 211102 (2010).
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G. Sobon, J. Sotor, and K. M. Abramski, “Passive harmonic mode-locking in Er-doped fiber laser based on graphene saturable absorber with repetition rates scalable to 2.22 GHz,” Appl. Phys. Lett.100(16), 161109 (2012).
[CrossRef]

J. Sotor, G. Sobon, K. Krzempek, and K. M. Abramski, “Fundamental and harmonic mode-locking in erbium-doped fiber laser based on graphene saturable absorber,” Opt. Commun.285(13-14), 3174–3178 (2012).
[CrossRef]

G. Sobon, J. Sotor, J. Jagiello, R. Kozinski, K. Librant, M. Zdrojek, L. Lipinska, and K. M. Abramski, “Linearly polarized, Q-switched Er-doped fiber laser based on reduced graphene oxide saturable absorber,” Appl. Phys. Lett.101(24), 241106 (2012).
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G. Sobon, J. Sotor, I. Pasternak, K. Grodecki, P. Paletko, W. Strupinski, Z. Jankiewicz, and K. M. Abramski, “„Er-Doped Fiber Laser Mode-Locked by CVD-Graphene Saturable Absorber,” J. Lightwave Technol.30(17), 2770–2775 (2012).
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D. Graf, F. Molitor, K. Ensslin, C. Stampfer, A. Jungen, C. Hierold, and L. Wirtz, “Spatially resolved Raman spectroscopy of single- and few-layer graphene,” Nano Lett.7(2), 238–242 (2007).
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[CrossRef] [PubMed]

D. Popa, Z. Sun, T. Hasan, F. Torrisi, F. Wang, and A. C. Ferrari, “Graphene Q-switched, tunable fiber laser,” Appl. Phys. Lett.98(7), 073106 (2011).
[CrossRef]

D. Popa, Z. Sun, F. Torrisi, T. Hasan, F. Wang, and A. C. Ferrari, “Sub 200 fs pulse generation from a graphene mode-locked fiber laser,” Appl. Phys. Lett.97(20), 203106 (2010).
[CrossRef]

Z. Sun, D. Popa, T. Hasan, F. Torrisi, F. Wang, E. J. R. Kelleher, J. C. Travers, V. Nicolosi, and A. C. Ferrari, “A stable, wideband tunable, near transform-limited, graphene-mode-locked, ultrafast laser,” Nano Res.3(9), 653–660 (2010).
[CrossRef]

Z. Sun, T. Hasan, F. Torrisi, D. Popa, G. Privitera, F. Wang, F. Bonaccorso, D. M. Basko, and A. C. Ferrari, “Graphene mode-locked ultrafast laser,” ACS Nano4(2), 803–810 (2010).
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Z. Sun, A. G. Rozhin, F. Wang, T. Hasan, D. Popa, W. O’Neill, and A. C. Ferrari, “A compact, high power, ultrafast laser mode-locked by carbon nanotubes,” Appl. Phys. Lett.95(25), 253102 (2009).
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H. Kataura, Y. Kumazawa, Y. Maniwa, I. Umezu, S. Suzuki, Y. Ohtsuka, and Y. Achiba, “Optical Properties of Single-Wall Carbon Nanotubes,” Synth. Met.103(1-3), 2555–2558 (1999).
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Tan, P. H.

T. Hasan, Z. Sun, F. Wang, F. Bonaccorso, P. H. Tan, A. G. Rozhin, and A. C. Ferrari, “Nanotube–Polymer Composites for Ultrafast Photonics,” Adv. Mater.21(38–39), 3874–3899 (2009).
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Tanaka, Y.

Tang, D.

C. Zhao, H. Zhang, X. Qi, Y. Chen, Z. Wang, S. Wen, and D. Tang, “Ultra-short pulse generation by a topological insulator based saturable absorber,” Appl. Phys. Lett.101(21), 211106 (2012).
[CrossRef]

C. Zhao, Y. Zou, Y. Chen, Z. Wang, S. Lu, H. Zhang, S. Wen, and D. Tang, “Wavelength-tunable picosecond soliton fiber laser with Topological Insulator: Bi2Se3 as a mode locker,” Opt. Express20(25), 27888–27895 (2012).
[CrossRef] [PubMed]

Q. Bao, H. Zhang, Z. Ni, Y. Wang, L. Polavarapu, Z. Shen, Q.-H. Xu, D. Tang, and K. P. Loh, “Monolayer graphene as a saturable absorber in a mode-locked laser,” Nano Res.4(3), 297–307 (2011).
[CrossRef]

H. Zhang, Q. Bao, D. Tang, L. Zhao, and K. Loh, “Large energy soliton erbium-doped fiber laser with a graphene-polymer composite mode locker,” Appl. Phys. Lett.95(14), 141103 (2009).
[CrossRef]

Tang, D. Y.

H. Zhang, D. Y. Tang, L. M. Zhao, Q. L. Bao, K. P. Loh, B. Lin, and S. C. Tjin, “Compact graphene modelocked wavelength-tunable erbium-doped fiber lasers: from all anomalous dispersion to all normal dispersion,” Laser Phys. Lett.7(8), 591–596 (2010).
[CrossRef]

H. Zhang, D. Y. Tang, L. M. Zhao, Q. L. Bao, and K. P. Loh, “Large energy mode locking of an erbium-doped fiber laser with atomic layer graphene,” Opt. Express17(20), 17630–17635 (2009).
[CrossRef] [PubMed]

Q. L. Bao, H. Zhang, Y. Wang, Z. H. Ni, Z. X. Shen, K. P. Loh, and D. Y. Tang, “Atomic layer graphene as saturable absorber for ultrafast pulsed laser,” Adv. Funct. Mater.19(19), 3077–3083 (2009).
[CrossRef]

Tang, M.

Tausenev, A. V.

Taylor, J. R.

Tian, X.

Tjin, S. C.

H. Zhang, D. Y. Tang, L. M. Zhao, Q. L. Bao, K. P. Loh, B. Lin, and S. C. Tjin, “Compact graphene modelocked wavelength-tunable erbium-doped fiber lasers: from all anomalous dispersion to all normal dispersion,” Laser Phys. Lett.7(8), 591–596 (2010).
[CrossRef]

Torrisi, F.

M. Zhang, E. J. R. Kelleher, F. Torrisi, Z. Sun, T. Hasan, D. Popa, F. Wang, A. C. Ferrari, S. V. Popov, and J. R. Taylor, “Tm-doped fiber laser mode-locked by graphene-polymer composite,” Opt. Express20(22), 25077–25084 (2012).
[CrossRef] [PubMed]

D. Popa, Z. Sun, T. Hasan, F. Torrisi, F. Wang, and A. C. Ferrari, “Graphene Q-switched, tunable fiber laser,” Appl. Phys. Lett.98(7), 073106 (2011).
[CrossRef]

D. Popa, Z. Sun, F. Torrisi, T. Hasan, F. Wang, and A. C. Ferrari, “Sub 200 fs pulse generation from a graphene mode-locked fiber laser,” Appl. Phys. Lett.97(20), 203106 (2010).
[CrossRef]

Z. Sun, D. Popa, T. Hasan, F. Torrisi, F. Wang, E. J. R. Kelleher, J. C. Travers, V. Nicolosi, and A. C. Ferrari, “A stable, wideband tunable, near transform-limited, graphene-mode-locked, ultrafast laser,” Nano Res.3(9), 653–660 (2010).
[CrossRef]

Z. Sun, T. Hasan, F. Torrisi, D. Popa, G. Privitera, F. Wang, F. Bonaccorso, D. M. Basko, and A. C. Ferrari, “Graphene mode-locked ultrafast laser,” ACS Nano4(2), 803–810 (2010).
[CrossRef] [PubMed]

Travers, J. C.

J. C. Travers, J. Morgenweg, E. D. Obraztsova, A. I. Chernov, E. J. R. Kelleher, and S. V. Popov, “Using the E22 transition of carbon nanotubes for fiber laser mode-locking,” Laser Phys. Lett.8(2), 144–149 (2011).
[CrossRef]

Z. Sun, D. Popa, T. Hasan, F. Torrisi, F. Wang, E. J. R. Kelleher, J. C. Travers, V. Nicolosi, and A. C. Ferrari, “A stable, wideband tunable, near transform-limited, graphene-mode-locked, ultrafast laser,” Nano Res.3(9), 653–660 (2010).
[CrossRef]

Tropper, A.

A. H. Quarterman, K. G. Wilcox, V. Apostolopoulos, Z. Mihoubi, S. P. Elsmere, I. Farrer, D. A. Ritchie, and A. Tropper, “A passively mode-locked external-cavity semiconductor laser emitting 60-fs pulses,” Nat. Photonics3(12), 729–731 (2009).
[CrossRef]

Tropper, A. C.

U. Keller and A. C. Tropper, “Passively mode-locked surface-emitting semiconductor lasers,” Phys. Rep.429(2), 67–120 (2006).
[CrossRef]

Umezu, I.

H. Kataura, Y. Kumazawa, Y. Maniwa, I. Umezu, S. Suzuki, Y. Ohtsuka, and Y. Achiba, “Optical Properties of Single-Wall Carbon Nanotubes,” Synth. Met.103(1-3), 2555–2558 (1999).
[CrossRef]

Wang, F.

M. Zhang, E. J. R. Kelleher, F. Torrisi, Z. Sun, T. Hasan, D. Popa, F. Wang, A. C. Ferrari, S. V. Popov, and J. R. Taylor, “Tm-doped fiber laser mode-locked by graphene-polymer composite,” Opt. Express20(22), 25077–25084 (2012).
[CrossRef] [PubMed]

D. Popa, Z. Sun, T. Hasan, F. Torrisi, F. Wang, and A. C. Ferrari, “Graphene Q-switched, tunable fiber laser,” Appl. Phys. Lett.98(7), 073106 (2011).
[CrossRef]

D. Popa, Z. Sun, F. Torrisi, T. Hasan, F. Wang, and A. C. Ferrari, “Sub 200 fs pulse generation from a graphene mode-locked fiber laser,” Appl. Phys. Lett.97(20), 203106 (2010).
[CrossRef]

Z. Sun, D. Popa, T. Hasan, F. Torrisi, F. Wang, E. J. R. Kelleher, J. C. Travers, V. Nicolosi, and A. C. Ferrari, “A stable, wideband tunable, near transform-limited, graphene-mode-locked, ultrafast laser,” Nano Res.3(9), 653–660 (2010).
[CrossRef]

Z. Sun, T. Hasan, F. Torrisi, D. Popa, G. Privitera, F. Wang, F. Bonaccorso, D. M. Basko, and A. C. Ferrari, “Graphene mode-locked ultrafast laser,” ACS Nano4(2), 803–810 (2010).
[CrossRef] [PubMed]

Z. Sun, A. G. Rozhin, F. Wang, T. Hasan, D. Popa, W. O’Neill, and A. C. Ferrari, “A compact, high power, ultrafast laser mode-locked by carbon nanotubes,” Appl. Phys. Lett.95(25), 253102 (2009).
[CrossRef]

T. Hasan, Z. Sun, F. Wang, F. Bonaccorso, P. H. Tan, A. G. Rozhin, and A. C. Ferrari, “Nanotube–Polymer Composites for Ultrafast Photonics,” Adv. Mater.21(38–39), 3874–3899 (2009).
[CrossRef]

Wang, Q.

Q. Wang, T. Chen, B. Zhang, M. Li, Y. Lu, and K. P. Chen, “All-fiber passively mode-locked thulium-doped fiber ring laser using optically deposited graphene saturable absorbers,” Appl. Phys. Lett.102(13), 131117 (2013).
[CrossRef]

Wang, Y.

Q. Bao, H. Zhang, Z. Ni, Y. Wang, L. Polavarapu, Z. Shen, Q.-H. Xu, D. Tang, and K. P. Loh, “Monolayer graphene as a saturable absorber in a mode-locked laser,” Nano Res.4(3), 297–307 (2011).
[CrossRef]

Q. L. Bao, H. Zhang, Y. Wang, Z. H. Ni, Z. X. Shen, K. P. Loh, and D. Y. Tang, “Atomic layer graphene as saturable absorber for ultrafast pulsed laser,” Adv. Funct. Mater.19(19), 3077–3083 (2009).
[CrossRef]

Wang, Z.

C. Zhao, Y. Zou, Y. Chen, Z. Wang, S. Lu, H. Zhang, S. Wen, and D. Tang, “Wavelength-tunable picosecond soliton fiber laser with Topological Insulator: Bi2Se3 as a mode locker,” Opt. Express20(25), 27888–27895 (2012).
[CrossRef] [PubMed]

C. Zhao, H. Zhang, X. Qi, Y. Chen, Z. Wang, S. Wen, and D. Tang, “Ultra-short pulse generation by a topological insulator based saturable absorber,” Appl. Phys. Lett.101(21), 211106 (2012).
[CrossRef]

Weingarten, K. J.

G. J. Spühler, K. J. Weingarten, R. Grange, L. Krainer, M. Haiml, V. Liverini, M. Golling, S. Schon, and U. Keller, “Semiconductor saturable absorber mirror structure with low saturation fluence,” Appl. Phys. B81(1), 23–27 (2005).
[CrossRef]

U. Keller, K. J. Weingarten, F. X. Kartner, D. Kopf, B. Braun, I. D. Jung, R. Fluck, C. Honninger, N. Matuschek, and J. Aus der Au, “Semiconductor Saturable Absorber Mirrors (SESAMs) for femtosecond to nanosecond pulse generation in solid-state lasers,” IEEE J. Sel. Top. Quantum Electron.2(3), 435–453 (1996).
[CrossRef]

Wen, S.

C. Zhao, Y. Zou, Y. Chen, Z. Wang, S. Lu, H. Zhang, S. Wen, and D. Tang, “Wavelength-tunable picosecond soliton fiber laser with Topological Insulator: Bi2Se3 as a mode locker,” Opt. Express20(25), 27888–27895 (2012).
[CrossRef] [PubMed]

C. Zhao, H. Zhang, X. Qi, Y. Chen, Z. Wang, S. Wen, and D. Tang, “Ultra-short pulse generation by a topological insulator based saturable absorber,” Appl. Phys. Lett.101(21), 211106 (2012).
[CrossRef]

Wilcox, K. G.

A. H. Quarterman, K. G. Wilcox, V. Apostolopoulos, Z. Mihoubi, S. P. Elsmere, I. Farrer, D. A. Ritchie, and A. Tropper, “A passively mode-locked external-cavity semiconductor laser emitting 60-fs pulses,” Nat. Photonics3(12), 729–731 (2009).
[CrossRef]

Wirtz, L.

D. Graf, F. Molitor, K. Ensslin, C. Stampfer, A. Jungen, C. Hierold, and L. Wirtz, “Spatially resolved Raman spectroscopy of single- and few-layer graphene,” Nano Lett.7(2), 238–242 (2007).
[CrossRef] [PubMed]

Xu, B.

Xu, Q.-H.

Q. Bao, H. Zhang, Z. Ni, Y. Wang, L. Polavarapu, Z. Shen, Q.-H. Xu, D. Tang, and K. P. Loh, “Monolayer graphene as a saturable absorber in a mode-locked laser,” Nano Res.4(3), 297–307 (2011).
[CrossRef]

Yaguchi, H.

Yamashita, S.

Yeh, C.-Y.

Yeom, D. I.

Zdrojek, M.

G. Sobon, J. Sotor, J. Jagiello, R. Kozinski, K. Librant, M. Zdrojek, L. Lipinska, and K. M. Abramski, “Linearly polarized, Q-switched Er-doped fiber laser based on reduced graphene oxide saturable absorber,” Appl. Phys. Lett.101(24), 241106 (2012).
[CrossRef]

Zhang, B.

Q. Wang, T. Chen, B. Zhang, M. Li, Y. Lu, and K. P. Chen, “All-fiber passively mode-locked thulium-doped fiber ring laser using optically deposited graphene saturable absorbers,” Appl. Phys. Lett.102(13), 131117 (2013).
[CrossRef]

Zhang, H.

C. Zhao, Y. Zou, Y. Chen, Z. Wang, S. Lu, H. Zhang, S. Wen, and D. Tang, “Wavelength-tunable picosecond soliton fiber laser with Topological Insulator: Bi2Se3 as a mode locker,” Opt. Express20(25), 27888–27895 (2012).
[CrossRef] [PubMed]

C. Zhao, H. Zhang, X. Qi, Y. Chen, Z. Wang, S. Wen, and D. Tang, “Ultra-short pulse generation by a topological insulator based saturable absorber,” Appl. Phys. Lett.101(21), 211106 (2012).
[CrossRef]

Q. Bao, H. Zhang, Z. Ni, Y. Wang, L. Polavarapu, Z. Shen, Q.-H. Xu, D. Tang, and K. P. Loh, “Monolayer graphene as a saturable absorber in a mode-locked laser,” Nano Res.4(3), 297–307 (2011).
[CrossRef]

H. Zhang, D. Y. Tang, L. M. Zhao, Q. L. Bao, K. P. Loh, B. Lin, and S. C. Tjin, “Compact graphene modelocked wavelength-tunable erbium-doped fiber lasers: from all anomalous dispersion to all normal dispersion,” Laser Phys. Lett.7(8), 591–596 (2010).
[CrossRef]

H. Zhang, Q. Bao, D. Tang, L. Zhao, and K. Loh, “Large energy soliton erbium-doped fiber laser with a graphene-polymer composite mode locker,” Appl. Phys. Lett.95(14), 141103 (2009).
[CrossRef]

H. Zhang, D. Y. Tang, L. M. Zhao, Q. L. Bao, and K. P. Loh, “Large energy mode locking of an erbium-doped fiber laser with atomic layer graphene,” Opt. Express17(20), 17630–17635 (2009).
[CrossRef] [PubMed]

Q. L. Bao, H. Zhang, Y. Wang, Z. H. Ni, Z. X. Shen, K. P. Loh, and D. Y. Tang, “Atomic layer graphene as saturable absorber for ultrafast pulsed laser,” Adv. Funct. Mater.19(19), 3077–3083 (2009).
[CrossRef]

Zhang, M.

Zhang, T.

Zhao, C.

C. Zhao, Y. Zou, Y. Chen, Z. Wang, S. Lu, H. Zhang, S. Wen, and D. Tang, “Wavelength-tunable picosecond soliton fiber laser with Topological Insulator: Bi2Se3 as a mode locker,” Opt. Express20(25), 27888–27895 (2012).
[CrossRef] [PubMed]

C. Zhao, H. Zhang, X. Qi, Y. Chen, Z. Wang, S. Wen, and D. Tang, “Ultra-short pulse generation by a topological insulator based saturable absorber,” Appl. Phys. Lett.101(21), 211106 (2012).
[CrossRef]

Zhao, L.

H. Zhang, Q. Bao, D. Tang, L. Zhao, and K. Loh, “Large energy soliton erbium-doped fiber laser with a graphene-polymer composite mode locker,” Appl. Phys. Lett.95(14), 141103 (2009).
[CrossRef]

Zhao, L. M.

H. Zhang, D. Y. Tang, L. M. Zhao, Q. L. Bao, K. P. Loh, B. Lin, and S. C. Tjin, “Compact graphene modelocked wavelength-tunable erbium-doped fiber lasers: from all anomalous dispersion to all normal dispersion,” Laser Phys. Lett.7(8), 591–596 (2010).
[CrossRef]

H. Zhang, D. Y. Tang, L. M. Zhao, Q. L. Bao, and K. P. Loh, “Large energy mode locking of an erbium-doped fiber laser with atomic layer graphene,” Opt. Express17(20), 17630–17635 (2009).
[CrossRef] [PubMed]

Zou, Y.

ACS Nano (1)

Z. Sun, T. Hasan, F. Torrisi, D. Popa, G. Privitera, F. Wang, F. Bonaccorso, D. M. Basko, and A. C. Ferrari, “Graphene mode-locked ultrafast laser,” ACS Nano4(2), 803–810 (2010).
[CrossRef] [PubMed]

Adv. Funct. Mater. (1)

Q. L. Bao, H. Zhang, Y. Wang, Z. H. Ni, Z. X. Shen, K. P. Loh, and D. Y. Tang, “Atomic layer graphene as saturable absorber for ultrafast pulsed laser,” Adv. Funct. Mater.19(19), 3077–3083 (2009).
[CrossRef]

Adv. Mater. (1)

T. Hasan, Z. Sun, F. Wang, F. Bonaccorso, P. H. Tan, A. G. Rozhin, and A. C. Ferrari, “Nanotube–Polymer Composites for Ultrafast Photonics,” Adv. Mater.21(38–39), 3874–3899 (2009).
[CrossRef]

Appl. Phys. B (1)

G. J. Spühler, K. J. Weingarten, R. Grange, L. Krainer, M. Haiml, V. Liverini, M. Golling, S. Schon, and U. Keller, “Semiconductor saturable absorber mirror structure with low saturation fluence,” Appl. Phys. B81(1), 23–27 (2005).
[CrossRef]

Appl. Phys. Express (1)

I. H. Baek, H. W. Lee, S. Bae, B. H. Hong, Y. H. Ahn, D. I. Yeom, and F. Rotermund, “Efficient mode-locking of sub-70-fs Ti: sapphire laser by graphene saturable absorber,” Appl. Phys. Express5(3), 032701 (2012).
[CrossRef]

Appl. Phys. Lett. (10)

D. Popa, Z. Sun, T. Hasan, F. Torrisi, F. Wang, and A. C. Ferrari, “Graphene Q-switched, tunable fiber laser,” Appl. Phys. Lett.98(7), 073106 (2011).
[CrossRef]

G. Sobon, J. Sotor, J. Jagiello, R. Kozinski, K. Librant, M. Zdrojek, L. Lipinska, and K. M. Abramski, “Linearly polarized, Q-switched Er-doped fiber laser based on reduced graphene oxide saturable absorber,” Appl. Phys. Lett.101(24), 241106 (2012).
[CrossRef]

C. Zhao, H. Zhang, X. Qi, Y. Chen, Z. Wang, S. Wen, and D. Tang, “Ultra-short pulse generation by a topological insulator based saturable absorber,” Appl. Phys. Lett.101(21), 211106 (2012).
[CrossRef]

D. Popa, Z. Sun, F. Torrisi, T. Hasan, F. Wang, and A. C. Ferrari, “Sub 200 fs pulse generation from a graphene mode-locked fiber laser,” Appl. Phys. Lett.97(20), 203106 (2010).
[CrossRef]

Y. M. Chang, H. Kim, J. H. Lee, and Y. Song, “Multilayered graphene efficiently formed by mechanical exfoliation for nonlinear saturable absorbers in fiber mode-locked lasers,” Appl. Phys. Lett.97(21), 211102 (2010).
[CrossRef]

Z. Sun, A. G. Rozhin, F. Wang, T. Hasan, D. Popa, W. O’Neill, and A. C. Ferrari, “A compact, high power, ultrafast laser mode-locked by carbon nanotubes,” Appl. Phys. Lett.95(25), 253102 (2009).
[CrossRef]

H. Zhang, Q. Bao, D. Tang, L. Zhao, and K. Loh, “Large energy soliton erbium-doped fiber laser with a graphene-polymer composite mode locker,” Appl. Phys. Lett.95(14), 141103 (2009).
[CrossRef]

Q. Wang, T. Chen, B. Zhang, M. Li, Y. Lu, and K. P. Chen, “All-fiber passively mode-locked thulium-doped fiber ring laser using optically deposited graphene saturable absorbers,” Appl. Phys. Lett.102(13), 131117 (2013).
[CrossRef]

A. Martinez, K. Fuse, and S. Yamashita, “Mechanical exfoliation of graphene for the passive mode-locking of fiber lasers,” Appl. Phys. Lett.99(12), 121107 (2011).
[CrossRef]

G. Sobon, J. Sotor, and K. M. Abramski, “Passive harmonic mode-locking in Er-doped fiber laser based on graphene saturable absorber with repetition rates scalable to 2.22 GHz,” Appl. Phys. Lett.100(16), 161109 (2012).
[CrossRef]

IEEE J. Sel. Top. Quantum Electron. (2)

L. A. Gomes, L. Orsila, T. Jouhti, and O. Okhotnikov, “Picosecond SESAM-Based ytterbium mode-locked fiber lasers,” IEEE J. Sel. Top. Quantum Electron.10(1), 129–136 (2004).
[CrossRef]

U. Keller, K. J. Weingarten, F. X. Kartner, D. Kopf, B. Braun, I. D. Jung, R. Fluck, C. Honninger, N. Matuschek, and J. Aus der Au, “Semiconductor Saturable Absorber Mirrors (SESAMs) for femtosecond to nanosecond pulse generation in solid-state lasers,” IEEE J. Sel. Top. Quantum Electron.2(3), 435–453 (1996).
[CrossRef]

J. Lightwave Technol. (2)

J. Nonlinear Opt. Phys. (1)

C. C. Lee, G. Acosta, J. S. Bunch, and T. R. Schibli, “Ultra-short optical pulse generation with single-layer graphene,” J. Nonlinear Opt. Phys.19(04), 767–771 (2010).
[CrossRef]

Laser Phys. Lett. (2)

H. Zhang, D. Y. Tang, L. M. Zhao, Q. L. Bao, K. P. Loh, B. Lin, and S. C. Tjin, “Compact graphene modelocked wavelength-tunable erbium-doped fiber lasers: from all anomalous dispersion to all normal dispersion,” Laser Phys. Lett.7(8), 591–596 (2010).
[CrossRef]

J. C. Travers, J. Morgenweg, E. D. Obraztsova, A. I. Chernov, E. J. R. Kelleher, and S. V. Popov, “Using the E22 transition of carbon nanotubes for fiber laser mode-locking,” Laser Phys. Lett.8(2), 144–149 (2011).
[CrossRef]

Nano Lett. (1)

D. Graf, F. Molitor, K. Ensslin, C. Stampfer, A. Jungen, C. Hierold, and L. Wirtz, “Spatially resolved Raman spectroscopy of single- and few-layer graphene,” Nano Lett.7(2), 238–242 (2007).
[CrossRef] [PubMed]

Nano Res. (2)

Q. Bao, H. Zhang, Z. Ni, Y. Wang, L. Polavarapu, Z. Shen, Q.-H. Xu, D. Tang, and K. P. Loh, “Monolayer graphene as a saturable absorber in a mode-locked laser,” Nano Res.4(3), 297–307 (2011).
[CrossRef]

Z. Sun, D. Popa, T. Hasan, F. Torrisi, F. Wang, E. J. R. Kelleher, J. C. Travers, V. Nicolosi, and A. C. Ferrari, “A stable, wideband tunable, near transform-limited, graphene-mode-locked, ultrafast laser,” Nano Res.3(9), 653–660 (2010).
[CrossRef]

Nat. Photonics (2)

F. Bonaccorso, Z. Sun, T. Hasan, and A. C. Ferrari, “Graphene photonics and optoelectronics,” Nat. Photonics4(9), 611–622 (2010).
[CrossRef]

A. H. Quarterman, K. G. Wilcox, V. Apostolopoulos, Z. Mihoubi, S. P. Elsmere, I. Farrer, D. A. Ritchie, and A. Tropper, “A passively mode-locked external-cavity semiconductor laser emitting 60-fs pulses,” Nat. Photonics3(12), 729–731 (2009).
[CrossRef]

Opt. Commun. (1)

J. Sotor, G. Sobon, K. Krzempek, and K. M. Abramski, “Fundamental and harmonic mode-locking in erbium-doped fiber laser based on graphene saturable absorber,” Opt. Commun.285(13-14), 3174–3178 (2012).
[CrossRef]

Opt. Express (10)

D. J. H. C. Maas, A.-R. Bellancourt, M. Hoffmann, B. Rudin, Y. Barbarin, M. Golling, T. Südmeyer, and U. Keller, “Growth parameter optimization for fast quantum dot SESAMs,” Opt. Express16(23), 18646–18656 (2008).
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S. Kivistö, T. Hakulinen, A. Kaskela, B. Aitchison, D. P. Brown, A. G. Nasibulin, E. I. Kauppinen, A. Härkönen, and O. G. Okhotnikov, “Carbon nanotube films for ultrafast broadband technology,” Opt. Express17(4), 2358–2363 (2009).
[CrossRef] [PubMed]

M. Zhang, E. J. R. Kelleher, F. Torrisi, Z. Sun, T. Hasan, D. Popa, F. Wang, A. C. Ferrari, S. V. Popov, and J. R. Taylor, “Tm-doped fiber laser mode-locked by graphene-polymer composite,” Opt. Express20(22), 25077–25084 (2012).
[CrossRef] [PubMed]

C. Zhao, Y. Zou, Y. Chen, Z. Wang, S. Lu, H. Zhang, S. Wen, and D. Tang, “Wavelength-tunable picosecond soliton fiber laser with Topological Insulator: Bi2Se3 as a mode locker,” Opt. Express20(25), 27888–27895 (2012).
[CrossRef] [PubMed]

H. Zhang, D. Y. Tang, L. M. Zhao, Q. L. Bao, and K. P. Loh, “Large energy mode locking of an erbium-doped fiber laser with atomic layer graphene,” Opt. Express17(20), 17630–17635 (2009).
[CrossRef] [PubMed]

A. Martinez, K. Fuse, B. Xu, and S. Yamashita, “Optical deposition of graphene and carbon nanotubes in a fiber ferrule for passive mode-locked lasing,” Opt. Express18(22), 23054–23061 (2010).
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A. Martinez and S. Yamashita, “Multi-gigahertz repetition rate passively modelocked fiber lasers using carbon nanotubes,” Opt. Express19(7), 6155–6163 (2011).
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P. L. Huang, S.-C. Lin, C.-Y. Yeh, H.-H. Kuo, S.-H. Huang, G.-R. Lin, L.-J. Li, C.-Y. Su, and W.-H. Cheng, “Stable mode-locked fiber laser based on CVD fabricated graphene saturable absorber,” Opt. Express20(3), 2460–2465 (2012).
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A. Schmidt, P. Koopmann, G. Huber, P. Fuhrberg, S. Y. Choi, D. I. Yeom, F. Rotermund, V. Petrov, and U. Griebner, “175 fs Tm:Lu2O3 laser at 2.07 µm mode-locked using single-walled carbon nanotubes,” Opt. Express20(5), 5313–5318 (2012).
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C. R. E. Baer, O. H. Heckl, C. J. Saraceno, C. Schriber, C. Kränkel, T. Südmeyer, and U. Keller, “Frontiers in passively mode-locked high-power thin disk laser oscillators,” Opt. Express20(7), 7054–7065 (2012).
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Opt. Lett. (6)

Phys. Rep. (1)

U. Keller and A. C. Tropper, “Passively mode-locked surface-emitting semiconductor lasers,” Phys. Rep.429(2), 67–120 (2006).
[CrossRef]

Phys. Rev. Lett. (1)

A. C. Ferrari, J. C. Meyer, V. Scardaci, C. Casiraghi, M. Lazzeri, F. Mauri, S. Piscanec, D. Jiang, K. S. Novoselov, S. Roth, and A. K. Geim, “Raman spectrum of graphene and graphene layers,” Phys. Rev. Lett.97(18), 187401 (2006).
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Science (1)

R. R. Nair, P. Blake, A. N. Grigorenko, K. S. Novoselov, T. J. Booth, T. Stauber, N. M. R. Peres, and A. K. Geim, “Fine structure constant defines visual transparency of graphene,” Science320(5881), 1308 (2008).
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Synth. Met. (1)

H. Kataura, Y. Kumazawa, Y. Maniwa, I. Umezu, S. Suzuki, Y. Ohtsuka, and Y. Achiba, “Optical Properties of Single-Wall Carbon Nanotubes,” Synth. Met.103(1-3), 2555–2558 (1999).
[CrossRef]

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Figures (6)

Fig. 1
Fig. 1

Raman spectrum of the PMMA/graphene composite with photograph of an exemplary fabricated free-standing membrane (a). Transmission measurement of the PMMA/graphene composite with indicated operational bands of Er and Tm-doped lasers (b).

Fig. 2
Fig. 2

Experimental setup of the dual-wavelength simultaneously mode-locked fiber laser.

Fig. 3
Fig. 3

Measured output spectra of the laser: a) 600 nm wide span confirming simultaneous mode locked operation at 1565 nm and 1944 nm, b) optical soliton generated in Er-doped loop. The CW peak at 1573 nm depicted in the inset graph is originated from the unabsorbed pump power from thulium-doped laser, c) optical soliton generated at 1944 nm in Tm-doped loop with characteristic dips resulting from water absorption in air.

Fig. 4
Fig. 4

RF spectra measured at: a) 1.55 µm output, b) 2µm output, c) external coupler combining 1.55 µm and 2µm outputs.

Fig. 5
Fig. 5

The pulse train measured at external coupler combining 1.55 µm and 2µm outputs.

Fig. 6
Fig. 6

The autocorrelation trace measured at: a) 1.55 µm output, b) 2µm output.

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