Abstract

In this paper we describe a high power narrow-band amplified spontaneous emission (ASE) light source at 1030 nm center wavelength generated in an Yb-doped fiber-based experimental setup. By cutting a small region out of a broadband ASE spectrum using two fiber Bragg gratings a strongly constrained bandwidth of 12 ± 2 pm (3.5 ± 0.6 GHz) is formed. A two-stage high power fiber amplifier system is used to boost the output power up to 697 W with a measured beam quality of M2≤1.34. In an additional experiment we demonstrate a stimulated Brillouin scattering (SBS) suppression of at least 17 dB (theoretically predicted ~20 dB), which is only limited by the dynamic range of the measurement and not by the onset of SBS when using the described light source. The presented narrow-band ASE source could be of great interest for brightness scaling applications by beam combination, where SBS is known as a limiting factor.

©2011 Optical Society of America

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    [Crossref] [PubMed]
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2011 (1)

2010 (5)

2009 (5)

2008 (1)

2007 (3)

2006 (2)

2003 (2)

2002 (1)

S. D. Jackson, “Direct evidence for laser re-absorption as initial cause for self-pulsing in three-level fiber lasers,” Electron. Lett. 38(25), 1640–1642 (2002).
[Crossref]

Aggarwal, R. L.

Andersen, T. V.

T. Eidam, S. Hanf, E. Seise, T. V. Andersen, T. Gabler, C. Wirth, T. Schreiber, J. Limpert, and A. Tünnermann, “Femtosecond fiber CPA system emitting 830 W average output power,” Opt. Lett. 35(2), 94–96 (2010).
[Crossref] [PubMed]

T. Schreiber, C. Wirth, O. Schmidt, T. V. Andersen, I. Tsybin, S. Böhme, T. Peschel, F. Brückner, T. Clausnitzer, F. Röser, R. Eberhardt, J. Limpert, and A. Tünnermann, “Incoherent beam combining of continuous-wave and pulsed Yb-doped fiber amplifiers,” IEEE J. Sel. Top. Quantum Electron. 15(2), 354–360 (2009).
[Crossref]

Augst, S. J.

Bartelt, H.

Barty, C. P. J.

Beach, R. J.

Becker, M.

Böhme, S.

T. Schreiber, C. Wirth, O. Schmidt, T. V. Andersen, I. Tsybin, S. Böhme, T. Peschel, F. Brückner, T. Clausnitzer, F. Röser, R. Eberhardt, J. Limpert, and A. Tünnermann, “Incoherent beam combining of continuous-wave and pulsed Yb-doped fiber amplifiers,” IEEE J. Sel. Top. Quantum Electron. 15(2), 354–360 (2009).
[Crossref]

Brückner, F.

T. Schreiber, C. Wirth, O. Schmidt, T. V. Andersen, I. Tsybin, S. Böhme, T. Peschel, F. Brückner, T. Clausnitzer, F. Röser, R. Eberhardt, J. Limpert, and A. Tünnermann, “Incoherent beam combining of continuous-wave and pulsed Yb-doped fiber amplifiers,” IEEE J. Sel. Top. Quantum Electron. 15(2), 354–360 (2009).
[Crossref]

C. Wirth, O. Schmidt, I. Tsybin, T. Schreiber, T. Peschel, F. Brückner, T. Clausnitzer, J. Limpert, R. Eberhardt, A. Tünnermann, M. Gowin, E. ten Have, K. Ludewigt, and M. Jung, “2 kW incoherent beam combining of four narrow-linewidth photonic crystal fiber amplifiers,” Opt. Express 17(3), 1178–1183 (2009).
[Crossref] [PubMed]

Brückner, S.

Chakravarty, U.

Chowdhury, D.

Clarkson, W. A.

Clausnitzer, T.

C. Wirth, O. Schmidt, I. Tsybin, T. Schreiber, T. Peschel, F. Brückner, T. Clausnitzer, J. Limpert, R. Eberhardt, A. Tünnermann, M. Gowin, E. ten Have, K. Ludewigt, and M. Jung, “2 kW incoherent beam combining of four narrow-linewidth photonic crystal fiber amplifiers,” Opt. Express 17(3), 1178–1183 (2009).
[Crossref] [PubMed]

T. Schreiber, C. Wirth, O. Schmidt, T. V. Andersen, I. Tsybin, S. Böhme, T. Peschel, F. Brückner, T. Clausnitzer, F. Röser, R. Eberhardt, J. Limpert, and A. Tünnermann, “Incoherent beam combining of continuous-wave and pulsed Yb-doped fiber amplifiers,” IEEE J. Sel. Top. Quantum Electron. 15(2), 354–360 (2009).
[Crossref]

Dawson, J. W.

Dong, Y.

Eberhardt, R.

C. Wirth, O. Schmidt, I. Tsybin, T. Schreiber, T. Peschel, F. Brückner, T. Clausnitzer, J. Limpert, R. Eberhardt, A. Tünnermann, M. Gowin, E. ten Have, K. Ludewigt, and M. Jung, “2 kW incoherent beam combining of four narrow-linewidth photonic crystal fiber amplifiers,” Opt. Express 17(3), 1178–1183 (2009).
[Crossref] [PubMed]

T. Schreiber, C. Wirth, O. Schmidt, T. V. Andersen, I. Tsybin, S. Böhme, T. Peschel, F. Brückner, T. Clausnitzer, F. Röser, R. Eberhardt, J. Limpert, and A. Tünnermann, “Incoherent beam combining of continuous-wave and pulsed Yb-doped fiber amplifiers,” IEEE J. Sel. Top. Quantum Electron. 15(2), 354–360 (2009).
[Crossref]

J. Limpert, F. Röser, S. Klingebiel, T. Schreiber, C. Wirth, T. Peschel, R. Eberhardt, and A. Tünnermann, “The rising power of fiber lasers and amplifiers,” IEEE J. Sel. Top. Quantum Electron. 13(3), 537–545 (2007).
[Crossref]

Eidam, T.

Ermeneux, S.

Fan, T. Y.

Gabler, T.

González Herráez, M.

Gottschall, T.

Gowin, M.

Goyal, A. K.

Hädrich, S.

Han, K.

P. Zhou, X. Wang, Y. Ma, K. Han, and Z. Liu, “Active phase locking of fiber amplifiers with 180 GHz ultrabroad linewidth,” Prog. Electromagn. Res. Lett. 17, 145–152 (2010).
[Crossref]

Hanf, S.

Heebner, J. E.

Jackson, S. D.

S. D. Jackson, “Direct evidence for laser re-absorption as initial cause for self-pulsing in three-level fiber lasers,” Electron. Lett. 38(25), 1640–1642 (2002).
[Crossref]

Jauregui, C.

Jung, M.

Klingebiel, S.

J. Limpert, F. Röser, S. Klingebiel, T. Schreiber, C. Wirth, T. Peschel, R. Eberhardt, and A. Tünnermann, “The rising power of fiber lasers and amplifiers,” IEEE J. Sel. Top. Quantum Electron. 13(3), 537–545 (2007).
[Crossref]

Knight, J. C.

J. C. Knight, “Photonic crystal fibres,” Nature 424(6950), 847–851 (2003).
[Crossref] [PubMed]

Kobyakov, A.

Kuruvilla, A.

Li, Q.

Limpert, J.

C. Jauregui, T. Eidam, J. Limpert, and A. Tünnermann, “The impact of modal interference on the beam quality of high-power fiber amplifiers,” Opt. Express 19(4), 3258–3271 (2011).
[Crossref] [PubMed]

A. Tünnermann, T. Schreiber, and J. Limpert, “Fiber lasers and amplifiers: an ultrafast performance evolution,” Appl. Opt. 49(25), F71–F78 (2010).
[Crossref] [PubMed]

T. Eidam, S. Hanf, E. Seise, T. V. Andersen, T. Gabler, C. Wirth, T. Schreiber, J. Limpert, and A. Tünnermann, “Femtosecond fiber CPA system emitting 830 W average output power,” Opt. Lett. 35(2), 94–96 (2010).
[Crossref] [PubMed]

J. Rothhardt, S. Hädrich, T. Gottschall, J. Limpert, A. Tünnermann, M. Rothhardt, M. Becker, S. Brückner, and H. Bartelt, “Generation of flattop pump pulses for OPCPA by coherent pulse stacking with fiber Bragg gratings,” Opt. Express 17(18), 16332–16341 (2009).
[Crossref] [PubMed]

T. Schreiber, C. Wirth, O. Schmidt, T. V. Andersen, I. Tsybin, S. Böhme, T. Peschel, F. Brückner, T. Clausnitzer, F. Röser, R. Eberhardt, J. Limpert, and A. Tünnermann, “Incoherent beam combining of continuous-wave and pulsed Yb-doped fiber amplifiers,” IEEE J. Sel. Top. Quantum Electron. 15(2), 354–360 (2009).
[Crossref]

C. Wirth, O. Schmidt, I. Tsybin, T. Schreiber, T. Peschel, F. Brückner, T. Clausnitzer, J. Limpert, R. Eberhardt, A. Tünnermann, M. Gowin, E. ten Have, K. Ludewigt, and M. Jung, “2 kW incoherent beam combining of four narrow-linewidth photonic crystal fiber amplifiers,” Opt. Express 17(3), 1178–1183 (2009).
[Crossref] [PubMed]

J. Limpert, F. Röser, S. Klingebiel, T. Schreiber, C. Wirth, T. Peschel, R. Eberhardt, and A. Tünnermann, “The rising power of fiber lasers and amplifiers,” IEEE J. Sel. Top. Quantum Electron. 13(3), 537–545 (2007).
[Crossref]

J. Limpert, O. Schmidt, J. Rothhardt, F. Röser, T. Schreiber, A. Tünnermann, S. Ermeneux, P. Yvernault, and F. Salin, “Extended single-mode photonic crystal fiber lasers,” Opt. Express 14(7), 2715–2720 (2006).
[Crossref] [PubMed]

Liu, Y.

Liu, Z.

P. Zhou, X. Wang, Y. Ma, K. Han, and Z. Liu, “Active phase locking of fiber amplifiers with 180 GHz ultrabroad linewidth,” Prog. Electromagn. Res. Lett. 17, 145–152 (2010).
[Crossref]

Ludewigt, K.

Lv, Z.

Ma, Y.

P. Zhou, X. Wang, Y. Ma, K. Han, and Z. Liu, “Active phase locking of fiber amplifiers with 180 GHz ultrabroad linewidth,” Prog. Electromagn. Res. Lett. 17, 145–152 (2010).
[Crossref]

Mermelstein, M. D.

Messerly, M. J.

Oak, S. M.

Pax, P. H.

Peschel, T.

C. Wirth, O. Schmidt, I. Tsybin, T. Schreiber, T. Peschel, F. Brückner, T. Clausnitzer, J. Limpert, R. Eberhardt, A. Tünnermann, M. Gowin, E. ten Have, K. Ludewigt, and M. Jung, “2 kW incoherent beam combining of four narrow-linewidth photonic crystal fiber amplifiers,” Opt. Express 17(3), 1178–1183 (2009).
[Crossref] [PubMed]

T. Schreiber, C. Wirth, O. Schmidt, T. V. Andersen, I. Tsybin, S. Böhme, T. Peschel, F. Brückner, T. Clausnitzer, F. Röser, R. Eberhardt, J. Limpert, and A. Tünnermann, “Incoherent beam combining of continuous-wave and pulsed Yb-doped fiber amplifiers,” IEEE J. Sel. Top. Quantum Electron. 15(2), 354–360 (2009).
[Crossref]

J. Limpert, F. Röser, S. Klingebiel, T. Schreiber, C. Wirth, T. Peschel, R. Eberhardt, and A. Tünnermann, “The rising power of fiber lasers and amplifiers,” IEEE J. Sel. Top. Quantum Electron. 13(3), 537–545 (2007).
[Crossref]

Ranka, J. K.

Röser, F.

T. Schreiber, C. Wirth, O. Schmidt, T. V. Andersen, I. Tsybin, S. Böhme, T. Peschel, F. Brückner, T. Clausnitzer, F. Röser, R. Eberhardt, J. Limpert, and A. Tünnermann, “Incoherent beam combining of continuous-wave and pulsed Yb-doped fiber amplifiers,” IEEE J. Sel. Top. Quantum Electron. 15(2), 354–360 (2009).
[Crossref]

J. Limpert, F. Röser, S. Klingebiel, T. Schreiber, C. Wirth, T. Peschel, R. Eberhardt, and A. Tünnermann, “The rising power of fiber lasers and amplifiers,” IEEE J. Sel. Top. Quantum Electron. 13(3), 537–545 (2007).
[Crossref]

J. Limpert, O. Schmidt, J. Rothhardt, F. Röser, T. Schreiber, A. Tünnermann, S. Ermeneux, P. Yvernault, and F. Salin, “Extended single-mode photonic crystal fiber lasers,” Opt. Express 14(7), 2715–2720 (2006).
[Crossref] [PubMed]

Rothhardt, J.

Rothhardt, M.

Salin, F.

Sanchez, A.

Sauer, M.

Schmidt, O.

Schreiber, T.

T. Eidam, S. Hanf, E. Seise, T. V. Andersen, T. Gabler, C. Wirth, T. Schreiber, J. Limpert, and A. Tünnermann, “Femtosecond fiber CPA system emitting 830 W average output power,” Opt. Lett. 35(2), 94–96 (2010).
[Crossref] [PubMed]

A. Tünnermann, T. Schreiber, and J. Limpert, “Fiber lasers and amplifiers: an ultrafast performance evolution,” Appl. Opt. 49(25), F71–F78 (2010).
[Crossref] [PubMed]

T. Schreiber, C. Wirth, O. Schmidt, T. V. Andersen, I. Tsybin, S. Böhme, T. Peschel, F. Brückner, T. Clausnitzer, F. Röser, R. Eberhardt, J. Limpert, and A. Tünnermann, “Incoherent beam combining of continuous-wave and pulsed Yb-doped fiber amplifiers,” IEEE J. Sel. Top. Quantum Electron. 15(2), 354–360 (2009).
[Crossref]

C. Wirth, O. Schmidt, I. Tsybin, T. Schreiber, T. Peschel, F. Brückner, T. Clausnitzer, J. Limpert, R. Eberhardt, A. Tünnermann, M. Gowin, E. ten Have, K. Ludewigt, and M. Jung, “2 kW incoherent beam combining of four narrow-linewidth photonic crystal fiber amplifiers,” Opt. Express 17(3), 1178–1183 (2009).
[Crossref] [PubMed]

J. Limpert, F. Röser, S. Klingebiel, T. Schreiber, C. Wirth, T. Peschel, R. Eberhardt, and A. Tünnermann, “The rising power of fiber lasers and amplifiers,” IEEE J. Sel. Top. Quantum Electron. 13(3), 537–545 (2007).
[Crossref]

J. Limpert, O. Schmidt, J. Rothhardt, F. Röser, T. Schreiber, A. Tünnermann, S. Ermeneux, P. Yvernault, and F. Salin, “Extended single-mode photonic crystal fiber lasers,” Opt. Express 14(7), 2715–2720 (2006).
[Crossref] [PubMed]

Seise, E.

Shenoy, M. R.

Shverdin, M. Y.

Siders, C. W.

Song, K. Y.

Sridharan, A. K.

Stappaerts, E. A.

ten Have, E.

Thévenaz, L.

Thyagarajan, K.

Tsybin, I.

T. Schreiber, C. Wirth, O. Schmidt, T. V. Andersen, I. Tsybin, S. Böhme, T. Peschel, F. Brückner, T. Clausnitzer, F. Röser, R. Eberhardt, J. Limpert, and A. Tünnermann, “Incoherent beam combining of continuous-wave and pulsed Yb-doped fiber amplifiers,” IEEE J. Sel. Top. Quantum Electron. 15(2), 354–360 (2009).
[Crossref]

C. Wirth, O. Schmidt, I. Tsybin, T. Schreiber, T. Peschel, F. Brückner, T. Clausnitzer, J. Limpert, R. Eberhardt, A. Tünnermann, M. Gowin, E. ten Have, K. Ludewigt, and M. Jung, “2 kW incoherent beam combining of four narrow-linewidth photonic crystal fiber amplifiers,” Opt. Express 17(3), 1178–1183 (2009).
[Crossref] [PubMed]

Tünnermann, A.

C. Jauregui, T. Eidam, J. Limpert, and A. Tünnermann, “The impact of modal interference on the beam quality of high-power fiber amplifiers,” Opt. Express 19(4), 3258–3271 (2011).
[Crossref] [PubMed]

A. Tünnermann, T. Schreiber, and J. Limpert, “Fiber lasers and amplifiers: an ultrafast performance evolution,” Appl. Opt. 49(25), F71–F78 (2010).
[Crossref] [PubMed]

T. Eidam, S. Hanf, E. Seise, T. V. Andersen, T. Gabler, C. Wirth, T. Schreiber, J. Limpert, and A. Tünnermann, “Femtosecond fiber CPA system emitting 830 W average output power,” Opt. Lett. 35(2), 94–96 (2010).
[Crossref] [PubMed]

J. Rothhardt, S. Hädrich, T. Gottschall, J. Limpert, A. Tünnermann, M. Rothhardt, M. Becker, S. Brückner, and H. Bartelt, “Generation of flattop pump pulses for OPCPA by coherent pulse stacking with fiber Bragg gratings,” Opt. Express 17(18), 16332–16341 (2009).
[Crossref] [PubMed]

C. Wirth, O. Schmidt, I. Tsybin, T. Schreiber, T. Peschel, F. Brückner, T. Clausnitzer, J. Limpert, R. Eberhardt, A. Tünnermann, M. Gowin, E. ten Have, K. Ludewigt, and M. Jung, “2 kW incoherent beam combining of four narrow-linewidth photonic crystal fiber amplifiers,” Opt. Express 17(3), 1178–1183 (2009).
[Crossref] [PubMed]

T. Schreiber, C. Wirth, O. Schmidt, T. V. Andersen, I. Tsybin, S. Böhme, T. Peschel, F. Brückner, T. Clausnitzer, F. Röser, R. Eberhardt, J. Limpert, and A. Tünnermann, “Incoherent beam combining of continuous-wave and pulsed Yb-doped fiber amplifiers,” IEEE J. Sel. Top. Quantum Electron. 15(2), 354–360 (2009).
[Crossref]

J. Limpert, F. Röser, S. Klingebiel, T. Schreiber, C. Wirth, T. Peschel, R. Eberhardt, and A. Tünnermann, “The rising power of fiber lasers and amplifiers,” IEEE J. Sel. Top. Quantum Electron. 13(3), 537–545 (2007).
[Crossref]

J. Limpert, O. Schmidt, J. Rothhardt, F. Röser, T. Schreiber, A. Tünnermann, S. Ermeneux, P. Yvernault, and F. Salin, “Extended single-mode photonic crystal fiber lasers,” Opt. Express 14(7), 2715–2720 (2006).
[Crossref] [PubMed]

Upadhyaya, B. N.

Wang, P.

Wang, X.

P. Zhou, X. Wang, Y. Ma, K. Han, and Z. Liu, “Active phase locking of fiber amplifiers with 180 GHz ultrabroad linewidth,” Prog. Electromagn. Res. Lett. 17, 145–152 (2010).
[Crossref]

Wirth, C.

T. Eidam, S. Hanf, E. Seise, T. V. Andersen, T. Gabler, C. Wirth, T. Schreiber, J. Limpert, and A. Tünnermann, “Femtosecond fiber CPA system emitting 830 W average output power,” Opt. Lett. 35(2), 94–96 (2010).
[Crossref] [PubMed]

T. Schreiber, C. Wirth, O. Schmidt, T. V. Andersen, I. Tsybin, S. Böhme, T. Peschel, F. Brückner, T. Clausnitzer, F. Röser, R. Eberhardt, J. Limpert, and A. Tünnermann, “Incoherent beam combining of continuous-wave and pulsed Yb-doped fiber amplifiers,” IEEE J. Sel. Top. Quantum Electron. 15(2), 354–360 (2009).
[Crossref]

C. Wirth, O. Schmidt, I. Tsybin, T. Schreiber, T. Peschel, F. Brückner, T. Clausnitzer, J. Limpert, R. Eberhardt, A. Tünnermann, M. Gowin, E. ten Have, K. Ludewigt, and M. Jung, “2 kW incoherent beam combining of four narrow-linewidth photonic crystal fiber amplifiers,” Opt. Express 17(3), 1178–1183 (2009).
[Crossref] [PubMed]

J. Limpert, F. Röser, S. Klingebiel, T. Schreiber, C. Wirth, T. Peschel, R. Eberhardt, and A. Tünnermann, “The rising power of fiber lasers and amplifiers,” IEEE J. Sel. Top. Quantum Electron. 13(3), 537–545 (2007).
[Crossref]

Yvernault, P.

Zhou, P.

P. Zhou, X. Wang, Y. Ma, K. Han, and Z. Liu, “Active phase locking of fiber amplifiers with 180 GHz ultrabroad linewidth,” Prog. Electromagn. Res. Lett. 17, 145–152 (2010).
[Crossref]

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Appl. Opt. (2)

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[Crossref]

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

J. Limpert, F. Röser, S. Klingebiel, T. Schreiber, C. Wirth, T. Peschel, R. Eberhardt, and A. Tünnermann, “The rising power of fiber lasers and amplifiers,” IEEE J. Sel. Top. Quantum Electron. 13(3), 537–545 (2007).
[Crossref]

T. Schreiber, C. Wirth, O. Schmidt, T. V. Andersen, I. Tsybin, S. Böhme, T. Peschel, F. Brückner, T. Clausnitzer, F. Röser, R. Eberhardt, J. Limpert, and A. Tünnermann, “Incoherent beam combining of continuous-wave and pulsed Yb-doped fiber amplifiers,” IEEE J. Sel. Top. Quantum Electron. 15(2), 354–360 (2009).
[Crossref]

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J. Limpert, O. Schmidt, J. Rothhardt, F. Röser, T. Schreiber, A. Tünnermann, S. Ermeneux, P. Yvernault, and F. Salin, “Extended single-mode photonic crystal fiber lasers,” Opt. Express 14(7), 2715–2720 (2006).
[Crossref] [PubMed]

C. Wirth, O. Schmidt, I. Tsybin, T. Schreiber, T. Peschel, F. Brückner, T. Clausnitzer, J. Limpert, R. Eberhardt, A. Tünnermann, M. Gowin, E. ten Have, K. Ludewigt, and M. Jung, “2 kW incoherent beam combining of four narrow-linewidth photonic crystal fiber amplifiers,” Opt. Express 17(3), 1178–1183 (2009).
[Crossref] [PubMed]

M. D. Mermelstein, “SBS threshold measurements and acoustic beam propagation modeling in guiding and anti-guiding single mode optical fibers,” Opt. Express 17(18), 16225–16237 (2009).
[Crossref] [PubMed]

J. W. Dawson, M. J. Messerly, R. J. Beach, M. Y. Shverdin, E. A. Stappaerts, A. K. Sridharan, P. H. Pax, J. E. Heebner, C. W. Siders, and C. P. J. Barty, “Analysis of the scalability of diffraction-limited fiber lasers and amplifiers to high average power,” Opt. Express 16(17), 13240–13266 (2008).
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C. Jauregui, T. Eidam, J. Limpert, and A. Tünnermann, “The impact of modal interference on the beam quality of high-power fiber amplifiers,” Opt. Express 19(4), 3258–3271 (2011).
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J. Rothhardt, S. Hädrich, T. Gottschall, J. Limpert, A. Tünnermann, M. Rothhardt, M. Becker, S. Brückner, and H. Bartelt, “Generation of flattop pump pulses for OPCPA by coherent pulse stacking with fiber Bragg gratings,” Opt. Express 17(18), 16332–16341 (2009).
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M. González Herráez, K. Y. Song, and L. Thévenaz, “Arbitrary-bandwidth Brillouin slow light in optical fibers,” Opt. Express 14(4), 1395–1400 (2006).
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P. Zhou, X. Wang, Y. Ma, K. Han, and Z. Liu, “Active phase locking of fiber amplifiers with 180 GHz ultrabroad linewidth,” Prog. Electromagn. Res. Lett. 17, 145–152 (2010).
[Crossref]

Other (5)

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V. Fomin, M. Abramov, A. Ferin, A. Abramov, D. Mochalov, N. Platonov, and V. Gapontsev, “10kW single mode fiber laser,” SyTu-1.3, Symposium on High-Power Fiber Lasers, 14th International Conference, Laser Optics 2010, St. Petersburg, Fla. (2010).

S. J. McNaught, J. E. Rothenberg, P. A. Thielen, M. G. Wickham, M. E. Weber, and G. D. Goodno, “Coherent combining of a 1.26-kW fiber amplifier,” in Advanced Solid-State Photonics, OSA Technical Digest (CD) (Optical Society of America, 2010), paper AMA2.

C. Wirth, O. Schmidt, I. Tsybin, T. Schreiber, R. Eberhardt, J. Limpert, and A. Tünnermann, “1kW narrow-linewidth fiber amplifier for spectral beam combining,” in Advanced Solid-State Photonics, OSA Technical Digest (CD) (Optical Society of America, 2008), paper WA6.

P. Wang, and W. A. Clarkson, “Tunable Yb-doped fiber amplified sontaneous emission source,” in Conference on Lasers and Electro-Optics/International Quantum Electronics Conference, OSA Technical Digest (CD) (Optical Society of America, 2009), paper CFM6.

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Figures (5)

Fig. 1
Fig. 1 Scheme of the experimental setup of the all-fiber ASE front-end, which is reducing the spectral bandwidth iteratively down to ~12 pm by means of two FBG. The final output power after ISO2 is 400 mW at a center wavelength of 1030 nm.

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Fig. 2
Fig. 2 Spectrum of the all-fiber ASE front-end at the output power of 400 mW. The spectral signature of FBG1 is still visible but 35 dB beneath the actual signal. The analysis of this spectrum reveals that 97.3% of the output power is within the 12 pm center peak.

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Fig. 3
Fig. 3 Schematic illustration of the amplifier system. The provided 400 mW power from the ASE front-end is amplified in the first fiber up to ~10 W, purified by an interference filter (IF) and further boosted in the main amplifier PCF up to maximum power of ~697 W.

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Fig. 4
Fig. 4 Output spectrum at maximum power of 697 W. By using an additional bandpass filter (1029 - 1033 nm) between the two amplifier stages non-signal light was removed before final amplification leaving 98.9% of the power inside the 12 pm center peak.

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Fig. 5
Fig. 5 The slope of the main fiber amplifier reveals an efficiency of 69%. At maximum launched pump power of ~1040 W the output power is as high as 697 W. The beam quality at this level is M2 = 1.34 and thus, close to the diffraction-limit.

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Equations (1)

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G = g B I   L   ( Δ υ B Δ υ B + Δ υ ) ,

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