Abstract

We have demonstrated and compared high-energy, in-band pumped erbium doped fiber amplifiers operating at 1562.5 nm under both a core pumping scheme (CRS) and a cladding pumping scheme (CLS). The CRS/CLS sources generated smooth, single-peak pulses with maximum pulse energies of ~1.53/1.50 mJ, and corresponding pulse widths of ~176/182 ns respectively, with an M2 of ~1.6 in both cases. However, the conversion efficiency for the CLS was >1.5 times higher than the equivalent CRS variant operating at the same pulse energy due to the lower pump intensity in the CLS that mitigates the detrimental effects of ion concentration quenching. With a longer fiber length in a CLS implementation a pulse energy of ~2.6 mJ is demonstrated with a corresponding M2 of ~4.2. Using numerical simulations we explain that the saturation of pulse energy observed in our experiments is due to saturation of the pump absorption.

© 2012 OSA

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2012

2011

J. Zhang, V. Fromzel, and M. Dubinskii, “Resonantly cladding-pumped Yb-free Er-doped LMA fiber laser with record high power and efficiency,” Opt. Express19(6), 5574–5578 (2011).
[CrossRef] [PubMed]

E. L. Lim, S. U. Alam, and D. J. Richardson, “The multipeak phenomena and nonlinear effects in Q-Switched fiber lasers,” IEEE Photon. Technol. Lett.23(23), 1763–1765 (2011).
[CrossRef]

M. N. Zervas, A. Marshall, and J. Kim, “Effective absorption in cladding-pumped fibers,” Proc. SPIE7914, 79141T (2011).
[CrossRef]

V. Kuhn, D. Kracht, J. Neumann, and P. Wessels, “Er-doped photonic crystal fiber amplifier with 70 W of output power,” Opt. Lett.36(16), 3030–3032 (2011).
[CrossRef] [PubMed]

2009

J. C. Jasapara, M. J. Andrejco, A. DeSantolo, A. D. Yablon, Z. Varallyay, J. W. Nicholson, J. M. Fini, D. J. DiGiovanni, C. Headley, E. Monberg, and F. V. DiMarcello, “Diffraction-limited fundamental mode operation of core-pumped very-large-mode-area Er fiber amplifiers,” IEEE J. Sel. Top. Quantum Electron.15(1), 3–11 (2009).
[CrossRef]

2008

2007

Y. Wang and C.-Q. Xu, “Actively Q-switched fiber lasers: Switching dynamics and nonlinear processes,” Prog. Quantum Electron.31(3-5), 131–216 (2007).
[CrossRef]

Y. Jeong, S. Yoo, C. A. Codemard, J. Nilsson, J. K. Sahu, D. N. Payne, R. Horley, P. W. Turner, L. Hickey, A. Harker, M. Lovelady, and A. Piper, “Erbium: Ytterbium codoped large-core fiber laser with 297-W continuous-wave output power,” IEEE J. Sel. Top. Quantum Electron.13(3), 573–579 (2007).
[CrossRef]

2006

2005

2004

V. N. Philippov, J. K. Sahu, C. A. Codemard, W. A. Clarkson, J.-N. Jang, J. Nilsson, and G. N. Pearson, “All-fiber 1.15-mJ pulsed eye-safe optical source,” Proc. SPIE5335, 1–7 (2004).
[CrossRef]

2003

2002

2001

C. C. Ranaud, H. L. Offerhaus, J. A. Alvarez-Chavez, J. Nilsson, W. A. Clarkson, P. W. Turner, D. J. Richardson, and A. B. Grudinin, “Characteristics of Q-switched cladding-pumped ytterbium-doped fiber lasers with different high-energy fiber designs,” IEEE J. Quantum Electron.37(2), 199–206 (2001).
[CrossRef]

1997

D. Taverner, D. J. Richardson, L. Dong, J. E. Caplen, K. Williams, and R. V. Penty, “158-µJ pulses from a single-transverse-mode, large-mode-area erbium-doped fiber amplifier,” Opt. Lett.22(6), 378–380 (1997).
[CrossRef] [PubMed]

P. Myslinski, D. Nguyen, and J. Chrostowski, “Effects of concentration on the performance of erbium-doped fiber amplifiers,” J. Lightwave Technol.15(1), 112–120 (1997).
[CrossRef]

A. Hardy and R. Oron, “Signal amplification in strongly pumped fiber amplifiers,” IEEE J. Quantum Electron.33(3), 307–313 (1997).
[CrossRef]

1993

J. Nilsson and B. Jaskorzynska, “Modeling and optimization of low-repetition-rate high-energy pulse amplification in cw-pumped erbium-doped fiber amplifiers,” Opt. Lett.18(24), 2099–2101 (1993).
[CrossRef] [PubMed]

E. Delevaque, T. Georges, M. Monerie, P. Lamouler, and J. F. Bayon, “Modeling of pair-induced quenching in erbium-doped silicate fibers,” IEEE Photon. Technol. Lett.5(1), 73–75 (1993).
[CrossRef]

Alam, S. U.

E. L. Lim, S. U. Alam, and D. J. Richardson, “Optimizing the pumping configuration for the power scaling of in-band pumped erbium doped fiber amplifiers,” Opt. Express20(13), 13886–13895 (2012).
[CrossRef] [PubMed]

E. L. Lim, S. U. Alam, and D. J. Richardson, “The multipeak phenomena and nonlinear effects in Q-Switched fiber lasers,” IEEE Photon. Technol. Lett.23(23), 1763–1765 (2011).
[CrossRef]

Alvarez-Chavez, J. A.

C. C. Ranaud, H. L. Offerhaus, J. A. Alvarez-Chavez, J. Nilsson, W. A. Clarkson, P. W. Turner, D. J. Richardson, and A. B. Grudinin, “Characteristics of Q-switched cladding-pumped ytterbium-doped fiber lasers with different high-energy fiber designs,” IEEE J. Quantum Electron.37(2), 199–206 (2001).
[CrossRef]

Andrejco, M. J.

J. C. Jasapara, M. J. Andrejco, A. DeSantolo, A. D. Yablon, Z. Varallyay, J. W. Nicholson, J. M. Fini, D. J. DiGiovanni, C. Headley, E. Monberg, and F. V. DiMarcello, “Diffraction-limited fundamental mode operation of core-pumped very-large-mode-area Er fiber amplifiers,” IEEE J. Sel. Top. Quantum Electron.15(1), 3–11 (2009).
[CrossRef]

Bayon, J. F.

E. Delevaque, T. Georges, M. Monerie, P. Lamouler, and J. F. Bayon, “Modeling of pair-induced quenching in erbium-doped silicate fibers,” IEEE Photon. Technol. Lett.5(1), 73–75 (1993).
[CrossRef]

Beach, R. J.

Bouzinac, J. P.

Brilliant, N. A.

Canat, G.

Caplen, J. E.

Chrostowski, J.

P. Myslinski, D. Nguyen, and J. Chrostowski, “Effects of concentration on the performance of erbium-doped fiber amplifiers,” J. Lightwave Technol.15(1), 112–120 (1997).
[CrossRef]

Clarkson, W. A.

V. N. Philippov, J. K. Sahu, C. A. Codemard, W. A. Clarkson, J.-N. Jang, J. Nilsson, and G. N. Pearson, “All-fiber 1.15-mJ pulsed eye-safe optical source,” Proc. SPIE5335, 1–7 (2004).
[CrossRef]

C. C. Ranaud, H. L. Offerhaus, J. A. Alvarez-Chavez, J. Nilsson, W. A. Clarkson, P. W. Turner, D. J. Richardson, and A. B. Grudinin, “Characteristics of Q-switched cladding-pumped ytterbium-doped fiber lasers with different high-energy fiber designs,” IEEE J. Quantum Electron.37(2), 199–206 (2001).
[CrossRef]

Codemard, C. A.

Y. Jeong, S. Yoo, C. A. Codemard, J. Nilsson, J. K. Sahu, D. N. Payne, R. Horley, P. W. Turner, L. Hickey, A. Harker, M. Lovelady, and A. Piper, “Erbium: Ytterbium codoped large-core fiber laser with 297-W continuous-wave output power,” IEEE J. Sel. Top. Quantum Electron.13(3), 573–579 (2007).
[CrossRef]

V. N. Philippov, J. K. Sahu, C. A. Codemard, W. A. Clarkson, J.-N. Jang, J. Nilsson, and G. N. Pearson, “All-fiber 1.15-mJ pulsed eye-safe optical source,” Proc. SPIE5335, 1–7 (2004).
[CrossRef]

Cole, B.

Delevaque, E.

E. Delevaque, T. Georges, M. Monerie, P. Lamouler, and J. F. Bayon, “Modeling of pair-induced quenching in erbium-doped silicate fibers,” IEEE Photon. Technol. Lett.5(1), 73–75 (1993).
[CrossRef]

DeSantolo, A.

J. C. Jasapara, M. J. Andrejco, A. DeSantolo, A. D. Yablon, Z. Varallyay, J. W. Nicholson, J. M. Fini, D. J. DiGiovanni, C. Headley, E. Monberg, and F. V. DiMarcello, “Diffraction-limited fundamental mode operation of core-pumped very-large-mode-area Er fiber amplifiers,” IEEE J. Sel. Top. Quantum Electron.15(1), 3–11 (2009).
[CrossRef]

Desmoulins, S.

Di Teodoro, F.

DiGiovanni, D. J.

J. C. Jasapara, M. J. Andrejco, A. DeSantolo, A. D. Yablon, Z. Varallyay, J. W. Nicholson, J. M. Fini, D. J. DiGiovanni, C. Headley, E. Monberg, and F. V. DiMarcello, “Diffraction-limited fundamental mode operation of core-pumped very-large-mode-area Er fiber amplifiers,” IEEE J. Sel. Top. Quantum Electron.15(1), 3–11 (2009).
[CrossRef]

DiMarcello, F. V.

J. C. Jasapara, M. J. Andrejco, A. DeSantolo, A. D. Yablon, Z. Varallyay, J. W. Nicholson, J. M. Fini, D. J. DiGiovanni, C. Headley, E. Monberg, and F. V. DiMarcello, “Diffraction-limited fundamental mode operation of core-pumped very-large-mode-area Er fiber amplifiers,” IEEE J. Sel. Top. Quantum Electron.15(1), 3–11 (2009).
[CrossRef]

Dong, L.

Drobshoff, A. D.

Dubinskii, M.

Fini, J. M.

J. C. Jasapara, M. J. Andrejco, A. DeSantolo, A. D. Yablon, Z. Varallyay, J. W. Nicholson, J. M. Fini, D. J. DiGiovanni, C. Headley, E. Monberg, and F. V. DiMarcello, “Diffraction-limited fundamental mode operation of core-pumped very-large-mode-area Er fiber amplifiers,” IEEE J. Sel. Top. Quantum Electron.15(1), 3–11 (2009).
[CrossRef]

Flavin, D.

Friberg, A. T.

Fromzel, V.

Georges, T.

E. Delevaque, T. Georges, M. Monerie, P. Lamouler, and J. F. Bayon, “Modeling of pair-induced quenching in erbium-doped silicate fibers,” IEEE Photon. Technol. Lett.5(1), 73–75 (1993).
[CrossRef]

Goldberg, L.

Grudinin, A. B.

C. C. Ranaud, H. L. Offerhaus, J. A. Alvarez-Chavez, J. Nilsson, W. A. Clarkson, P. W. Turner, D. J. Richardson, and A. B. Grudinin, “Characteristics of Q-switched cladding-pumped ytterbium-doped fiber lasers with different high-energy fiber designs,” IEEE J. Quantum Electron.37(2), 199–206 (2001).
[CrossRef]

Hardy, A.

A. Hardy and R. Oron, “Signal amplification in strongly pumped fiber amplifiers,” IEEE J. Quantum Electron.33(3), 307–313 (1997).
[CrossRef]

Harker, A.

Y. Jeong, S. Yoo, C. A. Codemard, J. Nilsson, J. K. Sahu, D. N. Payne, R. Horley, P. W. Turner, L. Hickey, A. Harker, M. Lovelady, and A. Piper, “Erbium: Ytterbium codoped large-core fiber laser with 297-W continuous-wave output power,” IEEE J. Sel. Top. Quantum Electron.13(3), 573–579 (2007).
[CrossRef]

Headley, C.

J. C. Jasapara, M. J. Andrejco, A. DeSantolo, A. D. Yablon, Z. Varallyay, J. W. Nicholson, J. M. Fini, D. J. DiGiovanni, C. Headley, E. Monberg, and F. V. DiMarcello, “Diffraction-limited fundamental mode operation of core-pumped very-large-mode-area Er fiber amplifiers,” IEEE J. Sel. Top. Quantum Electron.15(1), 3–11 (2009).
[CrossRef]

Hickey, L.

Y. Jeong, S. Yoo, C. A. Codemard, J. Nilsson, J. K. Sahu, D. N. Payne, R. Horley, P. W. Turner, L. Hickey, A. Harker, M. Lovelady, and A. Piper, “Erbium: Ytterbium codoped large-core fiber laser with 297-W continuous-wave output power,” IEEE J. Sel. Top. Quantum Electron.13(3), 573–579 (2007).
[CrossRef]

Horley, R.

Y. Jeong, S. Yoo, C. A. Codemard, J. Nilsson, J. K. Sahu, D. N. Payne, R. Horley, P. W. Turner, L. Hickey, A. Harker, M. Lovelady, and A. Piper, “Erbium: Ytterbium codoped large-core fiber laser with 297-W continuous-wave output power,” IEEE J. Sel. Top. Quantum Electron.13(3), 573–579 (2007).
[CrossRef]

Jang, J.-N.

V. N. Philippov, J. K. Sahu, C. A. Codemard, W. A. Clarkson, J.-N. Jang, J. Nilsson, and G. N. Pearson, “All-fiber 1.15-mJ pulsed eye-safe optical source,” Proc. SPIE5335, 1–7 (2004).
[CrossRef]

Jaouen, Y.

Jasapara, J. C.

J. C. Jasapara, M. J. Andrejco, A. DeSantolo, A. D. Yablon, Z. Varallyay, J. W. Nicholson, J. M. Fini, D. J. DiGiovanni, C. Headley, E. Monberg, and F. V. DiMarcello, “Diffraction-limited fundamental mode operation of core-pumped very-large-mode-area Er fiber amplifiers,” IEEE J. Sel. Top. Quantum Electron.15(1), 3–11 (2009).
[CrossRef]

Jaskorzynska, B.

Jeong, Y.

Y. Jeong, S. Yoo, C. A. Codemard, J. Nilsson, J. K. Sahu, D. N. Payne, R. Horley, P. W. Turner, L. Hickey, A. Harker, M. Lovelady, and A. Piper, “Erbium: Ytterbium codoped large-core fiber laser with 297-W continuous-wave output power,” IEEE J. Sel. Top. Quantum Electron.13(3), 573–579 (2007).
[CrossRef]

Khoptyar, D.

Kim, J.

M. N. Zervas, A. Marshall, and J. Kim, “Effective absorption in cladding-pumped fibers,” Proc. SPIE7914, 79141T (2011).
[CrossRef]

Kracht, D.

Kuhn, V.

Kulcsar, G.

Lamouler, P.

E. Delevaque, T. Georges, M. Monerie, P. Lamouler, and J. F. Bayon, “Modeling of pair-induced quenching in erbium-doped silicate fibers,” IEEE Photon. Technol. Lett.5(1), 73–75 (1993).
[CrossRef]

Lim, E. L.

E. L. Lim, S. U. Alam, and D. J. Richardson, “Optimizing the pumping configuration for the power scaling of in-band pumped erbium doped fiber amplifiers,” Opt. Express20(13), 13886–13895 (2012).
[CrossRef] [PubMed]

E. L. Lim, S. U. Alam, and D. J. Richardson, “The multipeak phenomena and nonlinear effects in Q-Switched fiber lasers,” IEEE Photon. Technol. Lett.23(23), 1763–1765 (2011).
[CrossRef]

Lovelady, M.

Y. Jeong, S. Yoo, C. A. Codemard, J. Nilsson, J. K. Sahu, D. N. Payne, R. Horley, P. W. Turner, L. Hickey, A. Harker, M. Lovelady, and A. Piper, “Erbium: Ytterbium codoped large-core fiber laser with 297-W continuous-wave output power,” IEEE J. Sel. Top. Quantum Electron.13(3), 573–579 (2007).
[CrossRef]

Marshall, A.

M. N. Zervas, A. Marshall, and J. Kim, “Effective absorption in cladding-pumped fibers,” Proc. SPIE7914, 79141T (2011).
[CrossRef]

Mollier, J. C.

Monberg, E.

J. C. Jasapara, M. J. Andrejco, A. DeSantolo, A. D. Yablon, Z. Varallyay, J. W. Nicholson, J. M. Fini, D. J. DiGiovanni, C. Headley, E. Monberg, and F. V. DiMarcello, “Diffraction-limited fundamental mode operation of core-pumped very-large-mode-area Er fiber amplifiers,” IEEE J. Sel. Top. Quantum Electron.15(1), 3–11 (2009).
[CrossRef]

Monerie, M.

E. Delevaque, T. Georges, M. Monerie, P. Lamouler, and J. F. Bayon, “Modeling of pair-induced quenching in erbium-doped silicate fibers,” IEEE Photon. Technol. Lett.5(1), 73–75 (1993).
[CrossRef]

Myslinski, P.

P. Myslinski, D. Nguyen, and J. Chrostowski, “Effects of concentration on the performance of erbium-doped fiber amplifiers,” J. Lightwave Technol.15(1), 112–120 (1997).
[CrossRef]

Neumann, J.

Nguyen, D.

P. Myslinski, D. Nguyen, and J. Chrostowski, “Effects of concentration on the performance of erbium-doped fiber amplifiers,” J. Lightwave Technol.15(1), 112–120 (1997).
[CrossRef]

Nicholson, J. W.

J. C. Jasapara, M. J. Andrejco, A. DeSantolo, A. D. Yablon, Z. Varallyay, J. W. Nicholson, J. M. Fini, D. J. DiGiovanni, C. Headley, E. Monberg, and F. V. DiMarcello, “Diffraction-limited fundamental mode operation of core-pumped very-large-mode-area Er fiber amplifiers,” IEEE J. Sel. Top. Quantum Electron.15(1), 3–11 (2009).
[CrossRef]

Nilsson, J.

Y. Jeong, S. Yoo, C. A. Codemard, J. Nilsson, J. K. Sahu, D. N. Payne, R. Horley, P. W. Turner, L. Hickey, A. Harker, M. Lovelady, and A. Piper, “Erbium: Ytterbium codoped large-core fiber laser with 297-W continuous-wave output power,” IEEE J. Sel. Top. Quantum Electron.13(3), 573–579 (2007).
[CrossRef]

V. N. Philippov, J. K. Sahu, C. A. Codemard, W. A. Clarkson, J.-N. Jang, J. Nilsson, and G. N. Pearson, “All-fiber 1.15-mJ pulsed eye-safe optical source,” Proc. SPIE5335, 1–7 (2004).
[CrossRef]

C. C. Ranaud, H. L. Offerhaus, J. A. Alvarez-Chavez, J. Nilsson, W. A. Clarkson, P. W. Turner, D. J. Richardson, and A. B. Grudinin, “Characteristics of Q-switched cladding-pumped ytterbium-doped fiber lasers with different high-energy fiber designs,” IEEE J. Quantum Electron.37(2), 199–206 (2001).
[CrossRef]

J. Nilsson and B. Jaskorzynska, “Modeling and optimization of low-repetition-rate high-energy pulse amplification in cw-pumped erbium-doped fiber amplifiers,” Opt. Lett.18(24), 2099–2101 (1993).
[CrossRef] [PubMed]

Offerhaus, H. L.

C. C. Ranaud, H. L. Offerhaus, J. A. Alvarez-Chavez, J. Nilsson, W. A. Clarkson, P. W. Turner, D. J. Richardson, and A. B. Grudinin, “Characteristics of Q-switched cladding-pumped ytterbium-doped fiber lasers with different high-energy fiber designs,” IEEE J. Quantum Electron.37(2), 199–206 (2001).
[CrossRef]

Oron, R.

A. Hardy and R. Oron, “Signal amplification in strongly pumped fiber amplifiers,” IEEE J. Quantum Electron.33(3), 307–313 (1997).
[CrossRef]

Payne, D. N.

Y. Jeong, S. Yoo, C. A. Codemard, J. Nilsson, J. K. Sahu, D. N. Payne, R. Horley, P. W. Turner, L. Hickey, A. Harker, M. Lovelady, and A. Piper, “Erbium: Ytterbium codoped large-core fiber laser with 297-W continuous-wave output power,” IEEE J. Sel. Top. Quantum Electron.13(3), 573–579 (2007).
[CrossRef]

Payne, S. A.

Pearson, G. N.

V. N. Philippov, J. K. Sahu, C. A. Codemard, W. A. Clarkson, J.-N. Jang, J. Nilsson, and G. N. Pearson, “All-fiber 1.15-mJ pulsed eye-safe optical source,” Proc. SPIE5335, 1–7 (2004).
[CrossRef]

Penty, R. V.

Philippov, V. N.

V. N. Philippov, J. K. Sahu, C. A. Codemard, W. A. Clarkson, J.-N. Jang, J. Nilsson, and G. N. Pearson, “All-fiber 1.15-mJ pulsed eye-safe optical source,” Proc. SPIE5335, 1–7 (2004).
[CrossRef]

Piper, A.

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Y. Jeong, S. Yoo, C. A. Codemard, J. Nilsson, J. K. Sahu, D. N. Payne, R. Horley, P. W. Turner, L. Hickey, A. Harker, M. Lovelady, and A. Piper, “Erbium: Ytterbium codoped large-core fiber laser with 297-W continuous-wave output power,” IEEE J. Sel. Top. Quantum Electron.13(3), 573–579 (2007).
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V. N. Philippov, J. K. Sahu, C. A. Codemard, W. A. Clarkson, J.-N. Jang, J. Nilsson, and G. N. Pearson, “All-fiber 1.15-mJ pulsed eye-safe optical source,” Proc. SPIE5335, 1–7 (2004).
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Y. Jeong, S. Yoo, C. A. Codemard, J. Nilsson, J. K. Sahu, D. N. Payne, R. Horley, P. W. Turner, L. Hickey, A. Harker, M. Lovelady, and A. Piper, “Erbium: Ytterbium codoped large-core fiber laser with 297-W continuous-wave output power,” IEEE J. Sel. Top. Quantum Electron.13(3), 573–579 (2007).
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C. C. Ranaud, H. L. Offerhaus, J. A. Alvarez-Chavez, J. Nilsson, W. A. Clarkson, P. W. Turner, D. J. Richardson, and A. B. Grudinin, “Characteristics of Q-switched cladding-pumped ytterbium-doped fiber lasers with different high-energy fiber designs,” IEEE J. Quantum Electron.37(2), 199–206 (2001).
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J. C. Jasapara, M. J. Andrejco, A. DeSantolo, A. D. Yablon, Z. Varallyay, J. W. Nicholson, J. M. Fini, D. J. DiGiovanni, C. Headley, E. Monberg, and F. V. DiMarcello, “Diffraction-limited fundamental mode operation of core-pumped very-large-mode-area Er fiber amplifiers,” IEEE J. Sel. Top. Quantum Electron.15(1), 3–11 (2009).
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C. C. Ranaud, H. L. Offerhaus, J. A. Alvarez-Chavez, J. Nilsson, W. A. Clarkson, P. W. Turner, D. J. Richardson, and A. B. Grudinin, “Characteristics of Q-switched cladding-pumped ytterbium-doped fiber lasers with different high-energy fiber designs,” IEEE J. Quantum Electron.37(2), 199–206 (2001).
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J. C. Jasapara, M. J. Andrejco, A. DeSantolo, A. D. Yablon, Z. Varallyay, J. W. Nicholson, J. M. Fini, D. J. DiGiovanni, C. Headley, E. Monberg, and F. V. DiMarcello, “Diffraction-limited fundamental mode operation of core-pumped very-large-mode-area Er fiber amplifiers,” IEEE J. Sel. Top. Quantum Electron.15(1), 3–11 (2009).
[CrossRef]

Y. Jeong, S. Yoo, C. A. Codemard, J. Nilsson, J. K. Sahu, D. N. Payne, R. Horley, P. W. Turner, L. Hickey, A. Harker, M. Lovelady, and A. Piper, “Erbium: Ytterbium codoped large-core fiber laser with 297-W continuous-wave output power,” IEEE J. Sel. Top. Quantum Electron.13(3), 573–579 (2007).
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[CrossRef]

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Y. Wang and H. Po, “Dynamic characteristics of double-clad fiber amplifiers for high-power pulse amplification,” J. Lightwave Technol.21(10), 2262–2270 (2003).
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Opt. Express

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M. N. Zervas, A. Marshall, and J. Kim, “Effective absorption in cladding-pumped fibers,” Proc. SPIE7914, 79141T (2011).
[CrossRef]

V. N. Philippov, J. K. Sahu, C. A. Codemard, W. A. Clarkson, J.-N. Jang, J. Nilsson, and G. N. Pearson, “All-fiber 1.15-mJ pulsed eye-safe optical source,” Proc. SPIE5335, 1–7 (2004).
[CrossRef]

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Y. Wang and C.-Q. Xu, “Actively Q-switched fiber lasers: Switching dynamics and nonlinear processes,” Prog. Quantum Electron.31(3-5), 131–216 (2007).
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E. L. Lim, S. Alam, and D. J. Richardson, “Highly efficient, high power, inband-pumped Erbium/Ytterbium-codoped fiber laser,” CLEO (2011).

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