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http://dx.doi.org/10.3807/KJOP.2020.31.1.007

A Study of the Fiber Fuse in Single-mode 2-kW-class High-power Fiber Amplifiers  

Lee, Junsu (Agency for Defense Development)
Lee, Kwang Hyun (Agency for Defense Development)
Jeong, Hwanseong (Agency for Defense Development)
Kim, Dong Jun (Agency for Defense Development)
Lee, Jung Hwan (Agency for Defense Development)
Jo, Minsik (Agency for Defense Development)
Publication Information
Korean Journal of Optics and Photonics / v.31, no.1, 2020 , pp. 7-12 More about this Journal
Abstract
In this paper, we experimentally investigate the fiber fuse in single-mode 2-kW-class high-power fiber amplifiers, depending on the cooling method at the splicing point. We measured the temperature of the splicing point between the pump-signal combiner and gain fiber as a function of laser output power. The temperature of the splicing point increased from 20 to 32℃ with a slope of 0.01℃/W, up to 1.2 kW of laser output power. At higher powers the temperature of the splicing point increased dramatically, with a slope of 0.08℃/W. After that, the fiber amplifier was destroyed during operation at 1.96 kW of output power by fiber fuse. The bullet shape, a common feature of fiber fuse, was observed in the damaged passive fiber core of the pump-signal combiner. Later, we adopted an improved water-cooled cold plate to increase the cooling efficiency at the splicing point, and investigated the laser output power. The temperature at the splicing point was 35.8℃ with a temperature-rise slope of 0.007℃/W at the maximum output power of 2.05 kW. The beam quality M2 was measured to be less than 1.3, and the output beam's profile was a stable Gaussian shape. Finally, neither fiber fuse nor mode instability was observed in the fiber amplifier at the maximum output power of 2.05 kW.
Keywords
Fiber lasers; Fiber amplifiers;
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1 J. Wang, S. Gray, D. Walton, and L. Zenteno, "Fiber fuse in high power optical fiber," Proc. SPIE 7134, 71342E (2008).
2 H. Zhang, P. Zhou, X. Wang, H. Xiao, and X. Xu, "Fiber fuse effect in high-power double-clad fiber laser," in Proc. Conference on Lasers and Electro-Optics Pacific Rim (Kyoto, Japan, Jun. 2013), paper WPD-4.
3 J.-Y. Sun, Q.-R. Xiao, D. Li, X.-J. Wang, H.-T. Zhang, M.-L. Gong, and P. Yang, "Fiber fuse behavior in kW-level continuous-wave double-clad field laser," Chin. Phys. B 25, 014202 (2015).   DOI
4 Q.-R. Xiao, J.-D. Tian, Y.-S. Huang, X.-J. Wang, Z.-H. Wang, D. Li, P. Yan, and M.-L. Gong, "Internal features of fiber fuse in a Yb-doped double-clad fiber at 3 kW," Chin. Phys. Lett. 35, 054201 (2018).   DOI
5 Q. Xiao, J. Tian, P. Yan, D. Li, and M. Gong, "Exploring the initiation of fiber fuse," Sci. Rep. 9, 11655 (2019).   DOI
6 R. Su, R. Tao, X. Wang, H. Zhang, P. Ma. P. Zhou, and X. Xu, "2.43 kW narrow linewidth linearly polarized all-fiber amplifier based on mode instability suppression," Laser Phys. Lett. 14, 085102 (2017).   DOI
7 K. Brar, M. Savage-Leuchs, J. Henrie, S. Courtney, C. Dilley, R. Afzal, and E. Honea, "Threshold power and fiber degradation induced modal instabilities in high power fiber amplifiers based on large mode area fibers," Proc. SPIE 8961, 89611R (2014).
8 D. J. Richardson, J. Nilsson, and W. A. Clarkson, "High power fiber lasers: current status and future perspectives," J. Opt. Soc. Am. B 27, B63-B92 (2010).   DOI
9 C. Jauregui, J. Limpert, and A. Tunnermann, "High-power fiber lasers," Nat. Photon. 7, 861-867 (2013).   DOI
10 M. N. Zervas and C. A. Codemard, "High power fiber lasers: a review," IEEE J. Sel. Top. Quantum Electron. 20, 0904123 (2014).
11 A. Liu, "Stimulated Brillouin scattering in single-frequency fiber amplifiers with delivery fibers," Opt. Express 17, 15201-15209 (2009).   DOI
12 G. Agrawal, Nonlinear Fiber Optics (Academic Press, Cambridge, US, 2012).
13 T. Eidam, C. Wirth, C. Jauregui, F. Stutzki, F. Jansen, H.-J. Otto, O. Schmidt, T. Schreiber, J. Limpert, and A. Tunnermann, "Experimental observations of the threshold-like onset of mode instabilities in high power fiber amplifiers," Opt. Express 19, 13218-13224 (2011).   DOI
14 Y. Fan, B. He, J. Zhou, J. Zheng, H. Liu, Y. Wei, J. Dong, and Q. Lou, "Thermal effects in kilowatt all-fiber MOPA," Opt. Express 19, 15162-15172 (2011).   DOI
15 Z. Huang, T. Y. Ng, C. P. Seah, S. H. T. Lim, and R. F. Wu, "Thermal modeling of active fiber and splice points in high power fiber laser," Proc. SPIE 7914, 79142W (2011).
16 R. Kashyap and K. J. Blow, "Observation of catastrophic self-propelled self-focusing in optical fibres," Electron. Lett. 24, 47-49 (1988).   DOI
17 Y. Shuto, S. Yanagi, S. Asakawa, M. Kobayashi, and R. Nagase, "Evaluation of high-temperature absorption coefficients of optical fibers," IEEE Photonics Technol. Lett. 16, 1008-1010 (2004).   DOI
18 E. M. Dianov, I. A. Bufetov, and A. A. Frolov, "Destruction of silica fiber cladding by the fuse effect," Opt. Lett. 29, 1852-1854 (2004).   DOI