Abstract

We performed an experimental investigation on a Q-switched, mode-locked laser based on the combination of passive Q switching and active mode locking. This study was carried out using an erbium fiber ring laser incorporating an active mode locker employing a fast Si-based variable optical attenuator and a passive Q switch based on a carbon nanotube saturable absorber. It was found that stable Q-switched, mode-locked pulses can be readily generated when using a particular cavity modulation index and pump power. It was also found that our scheme can easily alter the operating regime among the Q switching, Q-switched mode locking, and mode locking by simply controlling the cavity modulation index and/or the pump power. For this particular laser configuration, the cavity modulation index and pump power operating conditions have been experimentally analyzed for three laser operating regimes.

© 2012 Optical Society of America

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    [CrossRef]
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    [CrossRef]
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    [CrossRef]
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    [CrossRef]
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    [CrossRef]

2011 (4)

2010 (2)

S. Wang, H. Rhee, X. Wang, H. J. Eichler, S. Meister, T. Riesbeck, and J. Chen, “LD end pumped, actively mode locked and passively Q-switched Nd:YAP laser at 1341 nm,” Opt. Commun. 283, 570–573 (2010).
[CrossRef]

S. Zhao, G. Li, D. Li, K. Yang, Y. Li, M. Li, T. Li, G. Zhang, and K. Cheng, “Numerical simulation of dual-loss-modulated Q-switched and mode-locked laser with an acousto-optic and Cr4+:YAG saturable absorber,” Appl. Opt. 49, 1802–1808 (2010).
[CrossRef]

2009 (1)

2008 (3)

D. W. Zheng, B. T. Smith, and M. Asghari, “Improved efficiency Si-photonic attenuator,” Opt. Express 16, 16754–16765 (2008).
[CrossRef]

M. Li, S. Zhao, K. Yang, G. Li, D. Li, J. Wang, J. An, and W. Qiao, “Actively Q-switched and mode-locked diode-pumped Nd:GdVO4–KTP laser,” IEEE J. Quantum Electron. 44, 288–293 (2008).
[CrossRef]

C. Theobald, M. Weitz, R. Knappe, R. Wallenstein, and J. A. L’Huillier, “Stable Q-switch mode-locking of Nd:YVO4 lasers with a semiconductor saturable absorber,” Appl. Phys. B 92, 1–3 (2008).
[CrossRef]

2007 (2)

L. Pan, I. Utkin, and R. Fedosejevs, “Passively Q-switched ytterbium-doped double-clad fiber laser with a Cr4+:YAC saturable absorber,” IEEE Photon. Technol. Lett. 19, 1979–1981 (2007).
[CrossRef]

Y.-W. Song, S. Yamashita, C. S. Goh, and S. Y. Set, “Carbon nanotube mode lockers with enhanced nonlinearity via evanescent field interaction in D-shaped fibers,” Opt. Lett. 32, 148–150 (2007).
[CrossRef]

2004 (2)

2001 (1)

1999 (3)

1998 (1)

1995 (1)

H. A. Haus, K. Tamura, L. E. Nelson, and E. P. Ippen, “Stretched-pulse additive pulse mode-locking in fiber ring lasers: theory and experiment,” IEEE J. Quantum Electron. 31, 591–598 (1995).
[CrossRef]

1992 (1)

N. Kishi, J. N. Carter, R. Mottahedeh, P. R. Morkel, R. G. Smart, A. J. Seeds, D. N. Payne, A. C. Tropper, D. C. Hanna, J. S. Roberts, and C. C. Button, “Actively mode-locked and passively Q-switched operation of thulium-doped fibre laser using multiquantum well asymmetric Fabry–Perot modulator,” Electron. Lett. 28, 175–177 (1992).
[CrossRef]

Achiba, Y.

S. Y. Set, H. Yaguchi, Y. Tanaka, M. Jablonski, Y. Sakakibara, M. Tokomuto, H. Kataura, Y. Achiba, and K. Kikuchi, “A dual-regime mode-locked/Q-switched laser using a saturable absorber incorporating carbon nanotubes (SAINT),” in Proceedings of the Conference on Lasers and Electro-optics (CLEO‘03), postdeadline paper (IEEE, 2003).

Agnesi, A.

An, J.

M. Li, S. Zhao, K. Yang, G. Li, D. Li, J. Wang, J. An, and W. Qiao, “Actively Q-switched and mode-locked diode-pumped Nd:GdVO4–KTP laser,” IEEE J. Quantum Electron. 44, 288–293 (2008).
[CrossRef]

Andrés, M. V.

Asghari, M.

Brodeur, A.

Button, C. C.

N. Kishi, J. N. Carter, R. Mottahedeh, P. R. Morkel, R. G. Smart, A. J. Seeds, D. N. Payne, A. C. Tropper, D. C. Hanna, J. S. Roberts, and C. C. Button, “Actively mode-locked and passively Q-switched operation of thulium-doped fibre laser using multiquantum well asymmetric Fabry–Perot modulator,” Electron. Lett. 28, 175–177 (1992).
[CrossRef]

Carter, J. N.

N. Kishi, J. N. Carter, R. Mottahedeh, P. R. Morkel, R. G. Smart, A. J. Seeds, D. N. Payne, A. C. Tropper, D. C. Hanna, J. S. Roberts, and C. C. Button, “Actively mode-locked and passively Q-switched operation of thulium-doped fibre laser using multiquantum well asymmetric Fabry–Perot modulator,” Electron. Lett. 28, 175–177 (1992).
[CrossRef]

Chang, Y. M.

Chen, J.

S. Wang, H. Rhee, X. Wang, H. J. Eichler, S. Meister, T. Riesbeck, and J. Chen, “LD end pumped, actively mode locked and passively Q-switched Nd:YAP laser at 1341 nm,” Opt. Commun. 283, 570–573 (2010).
[CrossRef]

Chen, Z. J.

Cheng, K.

Cruz, J. L.

Cuadrado-Laborde, C.

Das, S. K.

Datta, P. K.

Degiogio, V.

Díez, A.

Dong, B.

Eichler, H. J.

S. Wang, H. Rhee, X. Wang, H. J. Eichler, S. Meister, T. Riesbeck, and J. Chen, “LD end pumped, actively mode locked and passively Q-switched Nd:YAP laser at 1341 nm,” Opt. Commun. 283, 570–573 (2010).
[CrossRef]

Fedosejevs, R.

L. Pan, I. Utkin, and R. Fedosejevs, “Passively Q-switched ytterbium-doped double-clad fiber laser with a Cr4+:YAC saturable absorber,” IEEE Photon. Technol. Lett. 19, 1979–1981 (2007).
[CrossRef]

Ferrari, A. C.

F. Wang, D. Popa, Z. Sun, T. Hasan, F. Torrisi, and A. C. Ferrari, “Characterization of dynamic nonlinear absorption of carbon nanotube saturable absorber,” in Conference on Lasers and Electro-Optics, Technical Digest (CD), (Optical Society of America, 2010).

García, J. F.

Gini, E.

Goh, C. S.

Grudinin, A. B.

Hanna, D. C.

N. Kishi, J. N. Carter, R. Mottahedeh, P. R. Morkel, R. G. Smart, A. J. Seeds, D. N. Payne, A. C. Tropper, D. C. Hanna, J. S. Roberts, and C. C. Button, “Actively mode-locked and passively Q-switched operation of thulium-doped fibre laser using multiquantum well asymmetric Fabry–Perot modulator,” Electron. Lett. 28, 175–177 (1992).
[CrossRef]

Hao, J.

Häring, R.

Hasan, T.

F. Wang, D. Popa, Z. Sun, T. Hasan, F. Torrisi, and A. C. Ferrari, “Characterization of dynamic nonlinear absorption of carbon nanotube saturable absorber,” in Conference on Lasers and Electro-Optics, Technical Digest (CD), (Optical Society of America, 2010).

Haus, H. A.

H. A. Haus, K. Tamura, L. E. Nelson, and E. P. Ippen, “Stretched-pulse additive pulse mode-locking in fiber ring lasers: theory and experiment,” IEEE J. Quantum Electron. 31, 591–598 (1995).
[CrossRef]

Hönninger, C.

Hu, J.

Ippen, E. P.

H. A. Haus, K. Tamura, L. E. Nelson, and E. P. Ippen, “Stretched-pulse additive pulse mode-locking in fiber ring lasers: theory and experiment,” IEEE J. Quantum Electron. 31, 591–598 (1995).
[CrossRef]

Jablonski, M.

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

S. Y. Set, H. Yaguchi, Y. Tanaka, M. Jablonski, Y. Sakakibara, M. Tokomuto, H. Kataura, Y. Achiba, and K. Kikuchi, “A dual-regime mode-locked/Q-switched laser using a saturable absorber incorporating carbon nanotubes (SAINT),” in Proceedings of the Conference on Lasers and Electro-optics (CLEO‘03), postdeadline paper (IEEE, 2003).

Jeong, M. Y.

Jhon, Y. M.

Kataura, H.

S. Y. Set, H. Yaguchi, Y. Tanaka, M. Jablonski, Y. Sakakibara, M. Tokomuto, H. Kataura, Y. Achiba, and K. Kikuchi, “A dual-regime mode-locked/Q-switched laser using a saturable absorber incorporating carbon nanotubes (SAINT),” in Proceedings of the Conference on Lasers and Electro-optics (CLEO‘03), postdeadline paper (IEEE, 2003).

Keller, U.

Kikuchi, K.

S. Y. Set, H. Yaguchi, Y. Tanaka, M. Jablonski, Y. Sakakibara, M. Tokomuto, H. Kataura, Y. Achiba, and K. Kikuchi, “A dual-regime mode-locked/Q-switched laser using a saturable absorber incorporating carbon nanotubes (SAINT),” in Proceedings of the Conference on Lasers and Electro-optics (CLEO‘03), postdeadline paper (IEEE, 2003).

Kim, C. S.

Kishi, N.

N. Kishi, J. N. Carter, R. Mottahedeh, P. R. Morkel, R. G. Smart, A. J. Seeds, D. N. Payne, A. C. Tropper, D. C. Hanna, J. S. Roberts, and C. C. Button, “Actively mode-locked and passively Q-switched operation of thulium-doped fibre laser using multiquantum well asymmetric Fabry–Perot modulator,” Electron. Lett. 28, 175–177 (1992).
[CrossRef]

Knappe, R.

C. Theobald, M. Weitz, R. Knappe, R. Wallenstein, and J. A. L’Huillier, “Stable Q-switch mode-locking of Nd:YVO4 lasers with a semiconductor saturable absorber,” Appl. Phys. B 92, 1–3 (2008).
[CrossRef]

L’Huillier, J. A.

C. Theobald, M. Weitz, R. Knappe, R. Wallenstein, and J. A. L’Huillier, “Stable Q-switch mode-locking of Nd:YVO4 lasers with a semiconductor saturable absorber,” Appl. Phys. B 92, 1–3 (2008).
[CrossRef]

Lee, H. D.

Lee, J.

Lee, J. H.

Li, D.

S. Zhao, G. Li, D. Li, K. Yang, Y. Li, M. Li, T. Li, G. Zhang, and K. Cheng, “Numerical simulation of dual-loss-modulated Q-switched and mode-locked laser with an acousto-optic and Cr4+:YAG saturable absorber,” Appl. Opt. 49, 1802–1808 (2010).
[CrossRef]

M. Li, S. Zhao, K. Yang, G. Li, D. Li, J. Wang, J. An, and W. Qiao, “Actively Q-switched and mode-locked diode-pumped Nd:GdVO4–KTP laser,” IEEE J. Quantum Electron. 44, 288–293 (2008).
[CrossRef]

Li, G.

S. Zhao, G. Li, D. Li, K. Yang, Y. Li, M. Li, T. Li, G. Zhang, and K. Cheng, “Numerical simulation of dual-loss-modulated Q-switched and mode-locked laser with an acousto-optic and Cr4+:YAG saturable absorber,” Appl. Opt. 49, 1802–1808 (2010).
[CrossRef]

M. Li, S. Zhao, K. Yang, G. Li, D. Li, J. Wang, J. An, and W. Qiao, “Actively Q-switched and mode-locked diode-pumped Nd:GdVO4–KTP laser,” IEEE J. Quantum Electron. 44, 288–293 (2008).
[CrossRef]

Li, M.

S. Zhao, G. Li, D. Li, K. Yang, Y. Li, M. Li, T. Li, G. Zhang, and K. Cheng, “Numerical simulation of dual-loss-modulated Q-switched and mode-locked laser with an acousto-optic and Cr4+:YAG saturable absorber,” Appl. Opt. 49, 1802–1808 (2010).
[CrossRef]

M. Li, S. Zhao, K. Yang, G. Li, D. Li, J. Wang, J. An, and W. Qiao, “Actively Q-switched and mode-locked diode-pumped Nd:GdVO4–KTP laser,” IEEE J. Quantum Electron. 44, 288–293 (2008).
[CrossRef]

Li, T.

Li, Y.

Liaw, C.-Y.

Mazur, E.

Meister, S.

S. Wang, H. Rhee, X. Wang, H. J. Eichler, S. Meister, T. Riesbeck, and J. Chen, “LD end pumped, actively mode locked and passively Q-switched Nd:YAP laser at 1341 nm,” Opt. Commun. 283, 570–573 (2010).
[CrossRef]

Melchior, H.

Minelly, D.

Morier-Genoud, F.

Morkel, P. R.

N. Kishi, J. N. Carter, R. Mottahedeh, P. R. Morkel, R. G. Smart, A. J. Seeds, D. N. Payne, A. C. Tropper, D. C. Hanna, J. S. Roberts, and C. C. Button, “Actively mode-locked and passively Q-switched operation of thulium-doped fibre laser using multiquantum well asymmetric Fabry–Perot modulator,” Electron. Lett. 28, 175–177 (1992).
[CrossRef]

Moser, M.

Mottahedeh, R.

N. Kishi, J. N. Carter, R. Mottahedeh, P. R. Morkel, R. G. Smart, A. J. Seeds, D. N. Payne, A. C. Tropper, D. C. Hanna, J. S. Roberts, and C. C. Button, “Actively mode-locked and passively Q-switched operation of thulium-doped fibre laser using multiquantum well asymmetric Fabry–Perot modulator,” Electron. Lett. 28, 175–177 (1992).
[CrossRef]

Mukhopadhyay, S.

Nakazawa, M.

E. Yoshida, N. Shimizu, and M. Nakazawa, “A 40 GHz 0.9 ps regeneratively mode-locked fiber laser with a tuning range of 1530–156 nm,” IEEE Photon. Technol. Lett. 11, 1587–1589 (1999).
[CrossRef]

Nelson, L. E.

H. A. Haus, K. Tamura, L. E. Nelson, and E. P. Ippen, “Stretched-pulse additive pulse mode-locking in fiber ring lasers: theory and experiment,” IEEE J. Quantum Electron. 31, 591–598 (1995).
[CrossRef]

Offerhaus, H. L.

Pan, L.

L. Pan, I. Utkin, and R. Fedosejevs, “Passively Q-switched ytterbium-doped double-clad fiber laser with a Cr4+:YAC saturable absorber,” IEEE Photon. Technol. Lett. 19, 1979–1981 (2007).
[CrossRef]

Paschotta, R.

Payne, D. N.

N. Kishi, J. N. Carter, R. Mottahedeh, P. R. Morkel, R. G. Smart, A. J. Seeds, D. N. Payne, A. C. Tropper, D. C. Hanna, J. S. Roberts, and C. C. Button, “Actively mode-locked and passively Q-switched operation of thulium-doped fibre laser using multiquantum well asymmetric Fabry–Perot modulator,” Electron. Lett. 28, 175–177 (1992).
[CrossRef]

Popa, D.

F. Wang, D. Popa, Z. Sun, T. Hasan, F. Torrisi, and A. C. Ferrari, “Characterization of dynamic nonlinear absorption of carbon nanotube saturable absorber,” in Conference on Lasers and Electro-Optics, Technical Digest (CD), (Optical Society of America, 2010).

Porta, J.

Qiao, W.

M. Li, S. Zhao, K. Yang, G. Li, D. Li, J. Wang, J. An, and W. Qiao, “Actively Q-switched and mode-locked diode-pumped Nd:GdVO4–KTP laser,” IEEE J. Quantum Electron. 44, 288–293 (2008).
[CrossRef]

Rhee, H.

S. Wang, H. Rhee, X. Wang, H. J. Eichler, S. Meister, T. Riesbeck, and J. Chen, “LD end pumped, actively mode locked and passively Q-switched Nd:YAP laser at 1341 nm,” Opt. Commun. 283, 570–573 (2010).
[CrossRef]

Richardson, D. J.

Riesbeck, T.

S. Wang, H. Rhee, X. Wang, H. J. Eichler, S. Meister, T. Riesbeck, and J. Chen, “LD end pumped, actively mode locked and passively Q-switched Nd:YAP laser at 1341 nm,” Opt. Commun. 283, 570–573 (2010).
[CrossRef]

Roberts, J. S.

N. Kishi, J. N. Carter, R. Mottahedeh, P. R. Morkel, R. G. Smart, A. J. Seeds, D. N. Payne, A. C. Tropper, D. C. Hanna, J. S. Roberts, and C. C. Button, “Actively mode-locked and passively Q-switched operation of thulium-doped fibre laser using multiquantum well asymmetric Fabry–Perot modulator,” Electron. Lett. 28, 175–177 (1992).
[CrossRef]

Sakakibara, Y.

S. Y. Set, H. Yaguchi, Y. Tanaka, M. Jablonski, Y. Sakakibara, M. Tokomuto, H. Kataura, Y. Achiba, and K. Kikuchi, “A dual-regime mode-locked/Q-switched laser using a saturable absorber incorporating carbon nanotubes (SAINT),” in Proceedings of the Conference on Lasers and Electro-optics (CLEO‘03), postdeadline paper (IEEE, 2003).

Schaffer, C. B.

Seeds, A. J.

N. Kishi, J. N. Carter, R. Mottahedeh, P. R. Morkel, R. G. Smart, A. J. Seeds, D. N. Payne, A. C. Tropper, D. C. Hanna, J. S. Roberts, and C. C. Button, “Actively mode-locked and passively Q-switched operation of thulium-doped fibre laser using multiquantum well asymmetric Fabry–Perot modulator,” Electron. Lett. 28, 175–177 (1992).
[CrossRef]

Set, S. Y.

Y.-W. Song, S. Yamashita, C. S. Goh, and S. Y. Set, “Carbon nanotube mode lockers with enhanced nonlinearity via evanescent field interaction in D-shaped fibers,” Opt. Lett. 32, 148–150 (2007).
[CrossRef]

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

S. Y. Set, H. Yaguchi, Y. Tanaka, M. Jablonski, Y. Sakakibara, M. Tokomuto, H. Kataura, Y. Achiba, and K. Kikuchi, “A dual-regime mode-locked/Q-switched laser using a saturable absorber incorporating carbon nanotubes (SAINT),” in Proceedings of the Conference on Lasers and Electro-optics (CLEO‘03), postdeadline paper (IEEE, 2003).

Shimizu, N.

E. Yoshida, N. Shimizu, and M. Nakazawa, “A 40 GHz 0.9 ps regeneratively mode-locked fiber laser with a tuning range of 1530–156 nm,” IEEE Photon. Technol. Lett. 11, 1587–1589 (1999).
[CrossRef]

Smart, R. G.

N. Kishi, J. N. Carter, R. Mottahedeh, P. R. Morkel, R. G. Smart, A. J. Seeds, D. N. Payne, A. C. Tropper, D. C. Hanna, J. S. Roberts, and C. C. Button, “Actively mode-locked and passively Q-switched operation of thulium-doped fibre laser using multiquantum well asymmetric Fabry–Perot modulator,” Electron. Lett. 28, 175–177 (1992).
[CrossRef]

Smith, B. T.

Song, Y.-W.

Sun, Z.

F. Wang, D. Popa, Z. Sun, T. Hasan, F. Torrisi, and A. C. Ferrari, “Characterization of dynamic nonlinear absorption of carbon nanotube saturable absorber,” in Conference on Lasers and Electro-Optics, Technical Digest (CD), (Optical Society of America, 2010).

Tamura, K.

H. A. Haus, K. Tamura, L. E. Nelson, and E. P. Ippen, “Stretched-pulse additive pulse mode-locking in fiber ring lasers: theory and experiment,” IEEE J. Quantum Electron. 31, 591–598 (1995).
[CrossRef]

Tanaka, Y.

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

S. Y. Set, H. Yaguchi, Y. Tanaka, M. Jablonski, Y. Sakakibara, M. Tokomuto, H. Kataura, Y. Achiba, and K. Kikuchi, “A dual-regime mode-locked/Q-switched laser using a saturable absorber incorporating carbon nanotubes (SAINT),” in Proceedings of the Conference on Lasers and Electro-optics (CLEO‘03), postdeadline paper (IEEE, 2003).

Tartara, L.

Theobald, C.

C. Theobald, M. Weitz, R. Knappe, R. Wallenstein, and J. A. L’Huillier, “Stable Q-switch mode-locking of Nd:YVO4 lasers with a semiconductor saturable absorber,” Appl. Phys. B 92, 1–3 (2008).
[CrossRef]

Tokomuto, M.

S. Y. Set, H. Yaguchi, Y. Tanaka, M. Jablonski, Y. Sakakibara, M. Tokomuto, H. Kataura, Y. Achiba, and K. Kikuchi, “A dual-regime mode-locked/Q-switched laser using a saturable absorber incorporating carbon nanotubes (SAINT),” in Proceedings of the Conference on Lasers and Electro-optics (CLEO‘03), postdeadline paper (IEEE, 2003).

Torrisi, F.

F. Wang, D. Popa, Z. Sun, T. Hasan, F. Torrisi, and A. C. Ferrari, “Characterization of dynamic nonlinear absorption of carbon nanotube saturable absorber,” in Conference on Lasers and Electro-Optics, Technical Digest (CD), (Optical Society of America, 2010).

Tropper, A. C.

N. Kishi, J. N. Carter, R. Mottahedeh, P. R. Morkel, R. G. Smart, A. J. Seeds, D. N. Payne, A. C. Tropper, D. C. Hanna, J. S. Roberts, and C. C. Button, “Actively mode-locked and passively Q-switched operation of thulium-doped fibre laser using multiquantum well asymmetric Fabry–Perot modulator,” Electron. Lett. 28, 175–177 (1992).
[CrossRef]

Utkin, I.

L. Pan, I. Utkin, and R. Fedosejevs, “Passively Q-switched ytterbium-doped double-clad fiber laser with a Cr4+:YAC saturable absorber,” IEEE Photon. Technol. Lett. 19, 1979–1981 (2007).
[CrossRef]

Wallenstein, R.

C. Theobald, M. Weitz, R. Knappe, R. Wallenstein, and J. A. L’Huillier, “Stable Q-switch mode-locking of Nd:YVO4 lasers with a semiconductor saturable absorber,” Appl. Phys. B 92, 1–3 (2008).
[CrossRef]

Wang, F.

F. Wang, D. Popa, Z. Sun, T. Hasan, F. Torrisi, and A. C. Ferrari, “Characterization of dynamic nonlinear absorption of carbon nanotube saturable absorber,” in Conference on Lasers and Electro-Optics, Technical Digest (CD), (Optical Society of America, 2010).

Wang, J.

M. Li, S. Zhao, K. Yang, G. Li, D. Li, J. Wang, J. An, and W. Qiao, “Actively Q-switched and mode-locked diode-pumped Nd:GdVO4–KTP laser,” IEEE J. Quantum Electron. 44, 288–293 (2008).
[CrossRef]

Wang, S.

S. Wang, H. Rhee, X. Wang, H. J. Eichler, S. Meister, T. Riesbeck, and J. Chen, “LD end pumped, actively mode locked and passively Q-switched Nd:YAP laser at 1341 nm,” Opt. Commun. 283, 570–573 (2010).
[CrossRef]

Wang, X.

S. Wang, H. Rhee, X. Wang, H. J. Eichler, S. Meister, T. Riesbeck, and J. Chen, “LD end pumped, actively mode locked and passively Q-switched Nd:YAP laser at 1341 nm,” Opt. Commun. 283, 570–573 (2010).
[CrossRef]

Weitz, M.

C. Theobald, M. Weitz, R. Knappe, R. Wallenstein, and J. A. L’Huillier, “Stable Q-switch mode-locking of Nd:YVO4 lasers with a semiconductor saturable absorber,” Appl. Phys. B 92, 1–3 (2008).
[CrossRef]

Yaguchi, H.

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

S. Y. Set, H. Yaguchi, Y. Tanaka, M. Jablonski, Y. Sakakibara, M. Tokomuto, H. Kataura, Y. Achiba, and K. Kikuchi, “A dual-regime mode-locked/Q-switched laser using a saturable absorber incorporating carbon nanotubes (SAINT),” in Proceedings of the Conference on Lasers and Electro-optics (CLEO‘03), postdeadline paper (IEEE, 2003).

Yamashita, S.

Yang, K.

S. Zhao, G. Li, D. Li, K. Yang, Y. Li, M. Li, T. Li, G. Zhang, and K. Cheng, “Numerical simulation of dual-loss-modulated Q-switched and mode-locked laser with an acousto-optic and Cr4+:YAG saturable absorber,” Appl. Opt. 49, 1802–1808 (2010).
[CrossRef]

M. Li, S. Zhao, K. Yang, G. Li, D. Li, J. Wang, J. An, and W. Qiao, “Actively Q-switched and mode-locked diode-pumped Nd:GdVO4–KTP laser,” IEEE J. Quantum Electron. 44, 288–293 (2008).
[CrossRef]

Yoshida, E.

E. Yoshida, N. Shimizu, and M. Nakazawa, “A 40 GHz 0.9 ps regeneratively mode-locked fiber laser with a tuning range of 1530–156 nm,” IEEE Photon. Technol. Lett. 11, 1587–1589 (1999).
[CrossRef]

Yu, C.

Zhang, G.

Zhao, S.

S. Zhao, G. Li, D. Li, K. Yang, Y. Li, M. Li, T. Li, G. Zhang, and K. Cheng, “Numerical simulation of dual-loss-modulated Q-switched and mode-locked laser with an acousto-optic and Cr4+:YAG saturable absorber,” Appl. Opt. 49, 1802–1808 (2010).
[CrossRef]

M. Li, S. Zhao, K. Yang, G. Li, D. Li, J. Wang, J. An, and W. Qiao, “Actively Q-switched and mode-locked diode-pumped Nd:GdVO4–KTP laser,” IEEE J. Quantum Electron. 44, 288–293 (2008).
[CrossRef]

Zheng, D. W.

Appl. Opt. (2)

Appl. Phys. B (1)

C. Theobald, M. Weitz, R. Knappe, R. Wallenstein, and J. A. L’Huillier, “Stable Q-switch mode-locking of Nd:YVO4 lasers with a semiconductor saturable absorber,” Appl. Phys. B 92, 1–3 (2008).
[CrossRef]

Electron. Lett. (1)

N. Kishi, J. N. Carter, R. Mottahedeh, P. R. Morkel, R. G. Smart, A. J. Seeds, D. N. Payne, A. C. Tropper, D. C. Hanna, J. S. Roberts, and C. C. Button, “Actively mode-locked and passively Q-switched operation of thulium-doped fibre laser using multiquantum well asymmetric Fabry–Perot modulator,” Electron. Lett. 28, 175–177 (1992).
[CrossRef]

IEEE J. Quantum Electron. (2)

M. Li, S. Zhao, K. Yang, G. Li, D. Li, J. Wang, J. An, and W. Qiao, “Actively Q-switched and mode-locked diode-pumped Nd:GdVO4–KTP laser,” IEEE J. Quantum Electron. 44, 288–293 (2008).
[CrossRef]

H. A. Haus, K. Tamura, L. E. Nelson, and E. P. Ippen, “Stretched-pulse additive pulse mode-locking in fiber ring lasers: theory and experiment,” IEEE J. Quantum Electron. 31, 591–598 (1995).
[CrossRef]

IEEE Photon. Technol. Lett. (2)

E. Yoshida, N. Shimizu, and M. Nakazawa, “A 40 GHz 0.9 ps regeneratively mode-locked fiber laser with a tuning range of 1530–156 nm,” IEEE Photon. Technol. Lett. 11, 1587–1589 (1999).
[CrossRef]

L. Pan, I. Utkin, and R. Fedosejevs, “Passively Q-switched ytterbium-doped double-clad fiber laser with a Cr4+:YAC saturable absorber,” IEEE Photon. Technol. Lett. 19, 1979–1981 (2007).
[CrossRef]

J. Lightwave Technol. (1)

J. Opt. Soc. Am. B (1)

Opt. Commun. (1)

S. Wang, H. Rhee, X. Wang, H. J. Eichler, S. Meister, T. Riesbeck, and J. Chen, “LD end pumped, actively mode locked and passively Q-switched Nd:YAP laser at 1341 nm,” Opt. Commun. 283, 570–573 (2010).
[CrossRef]

Opt. Express (5)

Opt. Lett. (5)

Other (2)

F. Wang, D. Popa, Z. Sun, T. Hasan, F. Torrisi, and A. C. Ferrari, “Characterization of dynamic nonlinear absorption of carbon nanotube saturable absorber,” in Conference on Lasers and Electro-Optics, Technical Digest (CD), (Optical Society of America, 2010).

S. Y. Set, H. Yaguchi, Y. Tanaka, M. Jablonski, Y. Sakakibara, M. Tokomuto, H. Kataura, Y. Achiba, and K. Kikuchi, “A dual-regime mode-locked/Q-switched laser using a saturable absorber incorporating carbon nanotubes (SAINT),” in Proceedings of the Conference on Lasers and Electro-optics (CLEO‘03), postdeadline paper (IEEE, 2003).

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Figures (10)

Fig. 1.
Fig. 1.

(a) Schematic of our Q-switched, mode-locked EDF laser. (b) Schematic of the CNT-based saturable absorber prepared by spraying CNTs onto the flat face of a D-shaped fiber. Inset, SEM image of the sprayed CNTs.

Fig. 2.
Fig. 2.

Nonlinear transmission as a function of incident pulse peak power.

Fig. 3.
Fig. 3.

(a) Oscilloscope trace of the optical beam modulated by a sinusoidal electrical signal with a peak-to-peak voltage of 2 V at our fundamental mode-locking frequency of 12.75 MHz through the Si-based VOA. (b) Modulation index variation as a function of the peak-to-peak voltage of the applied electrical signal.

Fig. 4.
Fig. 4.

Measured optical spectrum of the laser output at a pump power of 42 mW.

Fig. 5.
Fig. 5.

(a) Oscilloscope traces of the laser output for the four different cavity modulation index values of 0.6%, 1%, 3.5%, and 5.5%. (b) Their corresponding electrical spectra.

Fig. 6.
Fig. 6.

(a) Magnified view of the Q-switched, mode-locked pulse at a cavity modulation index of 3.5%; a fitted curve of the Q-switching envelope is also shown. (b) Autocorrelation trace of the mode-locked pulses.

Fig. 7.
Fig. 7.

Oscilloscope traces of the laser output for the four different pump power values of 15, 26, 42, and 52 mW.

Fig. 8.
Fig. 8.

(a) Temporal width and repetition rate of the Q-switching envelope versus the applied pump power. (b) Average output optical power and the mode-locked pulse peak power of the laser as a function of the applied pump power.

Fig. 9.
Fig. 9.

Operating regime distribution of the laser as a function of the pump power and cavity modulation index.

Fig. 10.
Fig. 10.

Measured (a) oscilloscope traces and (b) average optical powers of the laser output recorded every 10 min for 1 h for three operating regimes at a fixed pump power of 42 mW.

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