Browse > Article
http://dx.doi.org/10.3807/KJOP.2020.31.5.218

High-beam-quality 2-kW-class Spectrally Combined Laser Using Narrow-linewidth Ytterbium-doped Polarization-maintaining Fiber Amplifiers  

Jeong, Hwanseong (Ground Technology Research Institute, Agency for Defense Development)
Lee, Kwang Hyun (Ground Technology Research Institute, Agency for Defense Development)
Lee, Junsu (Ground Technology Research Institute, Agency for Defense Development)
Kim, Dong-Joon (Ground Technology Research Institute, Agency for Defense Development)
Lee, Jung Hwan (Ground Technology Research Institute, Agency for Defense Development)
Jo, Minsik (Ground Technology Research Institute, Agency for Defense Development)
Publication Information
Korean Journal of Optics and Photonics / v.31, no.5, 2020 , pp. 218-222 More about this Journal
Abstract
In this paper, we have experimentally demonstrated a 2-kW-class spectrally-beam-combined laser with high beam quality, using narrow-linewidth ytterbium-doped polarization-maintaining fiber amplifiers. Five fiber amplifiers with different center wavelengths were implemented for the spectrally-beam-combined laser. The center wavelengths of the five amplifiers were 1062, 1063, 1064, 1065, and 1066 nm, respectively. A phase-modulated laser diode was used as a seed source for each amplifier. The seed sources were modulated by filtered pseudorandom-bit-sequence (PRBS) signals 5 GHz in linewidth. The polarization-maintaining large-mode-area fiber with a core size of 30 ㎛ was used as a delivery fiber to mitigate the stimulated Brillouin scattering (SBS) effect. The laser beams from five amplifiers were spectrally combined by a multilayer dielectric diffraction grating. The maximum output power and beam quality M2 of the combined laser were measured to be 2.3 kW and 1.74, respectively.
Keywords
Fiber lasers; Fiber amplifiers;
Citations & Related Records
Times Cited By KSCI : 2  (Citation Analysis)
연도 인용수 순위
1 J. Lee, K. H. Lee, H. Jeong, M. Park, J. H. Seung, and J. H. Lee, "2.05 kW all-fiber high-beam-quality fiber amplifier with stimulated Brillouin scattering suppression incorporating a narrow-linewidth fiber-Bragg-grating-stabilized laser diode seed source," Appl. Opt. 58, 6251-6256 (2019).   DOI
2 J. Wang, D. Yan, S . Xiong, B . Huang, and C . Li, "High power all-fiber amplifier with different seed power injection," Opt. Express 24, 14463-14469 (2016).   DOI
3 H. Lin, R. Tao, C. Li, B. Wang, C. Guo, Q. Shu, P. Zh ao, L. Xu. J. Wang, F. Jing, and Q. Chu, "3.7 kW monolithic narrow linewidth single mode fiber laser through simultaneously suppressing nonlinear effects and mode instability," Opt. Express 27, 9716-9724 (2019).   DOI
4 C. Jauregui, J. Limpert, and A. Tunnermann, "High-power fiber lasers," Nat. Photon. 7, 861-867 (2013).   DOI
5 M. N. Zervas and C. A. Codemard, "High power fiber lasers: a review," IEEE J. Sel. Top. Quantum. Electron. 20, 0904123 (2014).
6 P. Sprangle, B. Hafizi, A. Ting, and R. Fischer, "High-power lasers for directed-energy applications," Appl. Opt. 54, F201-F209 (2015).   DOI
7 A. Flores, I. Dajani, R. H. Holten, T. Ehrenreich, and B. T. Anderson, "Multi-kilowatt diffractive coherent combining of pseudorandom-modulated fiber amplifiers," Opt. Eng. 55, 096101 (2016).   DOI
8 H. Meng, T. Sun, H. Tan, J. Yu, W. Du, F. Tian, J. Li, S. Gao, X. Wang, and D. Wu, "High-brightness spectral beam combining of diode laser array stack in an external cavity," Opt. Express 23, 21819-21824 (2015).   DOI
9 T. Y. Fan, "Laser beam combining for high-power, highradiance sources," IEEE J. Sel. Top. Quantum Electron. 11, 567-577 (2005).   DOI
10 E. J. Bochove, "Theory of spectral beam combining of fiber lasers," IEEE J. Quantum Electron. 38, 432-445 (2002).   DOI
11 G. P. Agrawal, "Stimulated Brillouin scattering," in Nonlinear Fiber Optics, 4th ed. (Elsevier, USA, 2007), pp. 329-367.
12 K. R. Hansen, T. T. Alkeskjold, J. Broeng, and J. Lægsgaard, "Theoretical analysis of mode instability in high-power fiber amplifiers," Opt. Express 21, 1944-1971 (2013).   DOI
13 B. M. Anderson, A. Flores, and I. Dajani, "Filtered pseudo random modulated fiber amplifier with enhanced coherence and nonlinear suppression," Opt. Express 25, 17671-17682 (2017).   DOI
14 H.-J. Otto, N. Modsching, C. Jauregui, J. Limpert, and A. Tunnermann, "Impact of photodarkening on the mode instability threshold," Opt. Express 23, 15265-15277 (2015).   DOI
15 R. Tao, X. Wang, and P. Zhou, "Comprehensive theoretical study of mode instability in high-power fiber lasers by employing a universal model and its implications," IEEE. J. Sel. Top. Quantum. Electron. 24, 0903319 (2018).
16 X. Wang and Z. Wang "Self-aligning polarization strategy for making side polished polarization maintaining fiber devices," Opt. Express 18, 49-55 (2010).   DOI
17 Y. H. Park, Y. S. Youn, M. W. Jung, C. Jun, B.-A. Yu, and W. Shin, "Polarization-maintaining single-mode 400-W Yb-doped fiber laser with 2.5 GHz linewidth from a 3-stage MOPA system," Korean J. Opt. Photon, 29, 159-165 (2018).   DOI
18 P. Madasamy, T. Loftus, A. Thomas, P. Jones, and E. Honea, "Comparison of spectral beam combining approaches for high power fiber laser systems," Proc. SPIE 6952, 695207 (2008).
19 E. Honea, R. S. Afzal, M. Savage-Leuchs, J. Henrie, K. Brar, N. Kurz, D. Jander, N. Gitkind, D. Hu, C. Robin, A. M. Jones, R. Kasinadhuni, and R. Humphreys, "Advances in fiber laser spectral beam combining for power scaling," Proc. SPIE 9730, 97300Y (2016).
20 T. H. Loftus, A. M. Thomas, P. R. Hoffman, M. Norsen, R. Royse, A. Liu, and E. C. Honea, "Spectrally beam-combined fiber lasers for High-average-power applications," IEEE J. Sel. Top. Quantum Electron. 13, 487-497 (2007).   DOI