国产25/400μm掺镱双包层光纤实现2.2 kW窄线宽单模激光输出
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摘要
基于自主研制的均匀掺杂低热光系数25/400μm掺镱双包层光纤,开展了全光纤高功率窄线宽光纤激光放大实验。激光系统实现了中心波长为1060.3 nm、线宽为25 GHz、最高功率为2.2 kW的单模激光输出,其斜率效率达78%,光束质量因子M~2≈1.2,其功率是目前报道的基于国产25/400μm掺镱双包层光纤窄线宽放大器单模激光输出的最高功率。
Based on the self-developed large mode area Yb-doped double-cladding 25/400 μm active fiber with uniform doping and low thermo-optic coefficient, an all-fiber high-power narrow-linewidth fiber laser amplification experiment was carried out. The laser system achieves a single-mode fiber laser output with a maximum power of 2.2 kW, a linewidth of 25 GHz, and a center wavelength of 1060.3 nm, with a slope efficiency of 78% and a beam quality factor of M~2≈1.2. This is the highest output power currently reported for narrow-linewidth single-mode amplifiers based on domestic Yb-doped double-cladding 25/400 μm active fiber, to the best of our knowledge.
Based on the self-developed large mode area Yb-doped double-cladding 25/400 μm active fiber with uniform doping and low thermo-optic coefficient, an all-fiber high-power narrow-linewidth fiber laser amplification experiment was carried out. The laser system achieves a single-mode fiber laser output with a maximum power of 2.2 kW, a linewidth of 25 GHz, and a center wavelength of 1060.3 nm, with a slope efficiency of 78% and a beam quality factor of M~2≈1.2. This is the highest output power currently reported for narrow-linewidth single-mode amplifiers based on domestic Yb-doped double-cladding 25/400 μm active fiber, to the best of our knowledge.
引文
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[2] Mavalvala N,McClelland D E,Mueller G,et al.Lasers and optics:looking towards third generation gravitational wave detectors[J].General Relativity and Gravitation,2011,43(2):569-592.
[3] Chu S,Bjorkholm J E,Ashkin A,et al.Experimental observation of optically trapped atoms[J].Physical Review Letters,1986,57(3):314-317.
[4] Augst S J,Ranka J K,Fan T Y,et al.Beam combining of ytterbium fiber amplifiers (Invited)[J].Journal of the Optical Society of America B,2007,24(8):1707-1715.
[5] Liu A P,Mead R,Vatter T,et al.Spectral beam combining of high-power fiber lasers[J].Proceedings of SPIE,2004,5335:81-89.
[6] Yang Y F,Shen H,Chen X L,et al.2.5 kW near diffraction limit output obtained by all-fiber high-efficiency narrow-linewidth fiber laser[J].Chinese Journal of Lasers,2016,43(4):0419004.杨依枫,沈辉,陈晓龙,等.全光纤化高效率、窄线宽光纤激光器实现2.5 kW近衍射极限输出[J].中国激光,2016,43(4):0419004.
[7] Liu G B,Yang Y F,Wang J H,et al.Stimulated Brillouin scattering enhancement factor improvement in a 11.6-GHz-linewidth 1.5-kW Yb-doped fiber amplifier[J].Chinese Physics Letters,2016,33(7):074207.
[8] Haarlammert N,de Vries O,Liem A,et al.Build up and decay of mode instability in a high power fiber amplifier[J].Optics Express,2012,20(12):13274-13283.
[9] Otto H J,Jauregui C,Stutzki F,et al.Controlling mode instabilities by dynamic mode excitation with an acousto-optic deflector[J].Optics Express,2013,21(14):17285-17298.
[10] Otto H J,Klenke A,Jauregui C,et al.Scaling the mode instability threshold with multicore fibers[J].Optics Letters,2014,39(9):2680-2683.
[11] Tao R M,Wang X L,Zhou P.Comprehensive theoretical study of mode instability in high-power fiber lasers by employing a universal model and its implications[J].IEEE Journal of Selected Topics in Quantum Electronics,2018,24(3):0903319.
[12] Xu W B,Ren J J,Shao C Y,et al.Effect of P5+ on spectroscopy and structure of Yb3+/Al3+/P5+ co-doped silica glass[J].Journal of Luminescence,2015,167:8-15.
[13] Deschamps T,Vezin H,Gonnet C,et al.Evidence of AlOHC responsible for the radiation-induced darkening in Yb doped fiber[J].Optics Express,2013,21(7):8382-8392.