大口径端泵片状放大器的泵浦耦合系统

为了满足片状激光放大器对泵浦功率密度的要求, 设计并加工了高缩束比的耦合系统。根据LD的发光特性, 将输出功率为80 kW的LD阵列进行拟球面排列, 采用正交柱面透镜配合空心导光管进行泵浦耦合, 将发光面积为330 mm×85 mm的泵浦光, 在输出口处压缩至18 mm×18 mm的口径, 耦合系统的缩束比高达86∶1。模拟计算表明, 该耦合系统的耦合效率对导光管反射板的反射率依赖性较低。实验测量该耦合系统的效率为84.2%, 输出口处泵浦光场快慢轴的调制度分别为130和1.18, 且脱离耦合系统后的泵浦光传输8.5 mm后, 依然可以保持泵浦光场的轮廓。该耦合系统在效率、泵浦场均匀性、传输性等方面均满足端面泵浦的片状放大器对泵浦耦合系统的要求。

Abstract

A coupling system with a high contraction coefficient, up to 86∶1, has been designed and manufactured. The output from the spherically arranged 80 kW LD arrays is delivered by orthogonal cylindrical lenses and a hollow duct. Experimentally measured coupling efficiency of the system is 84.2%. Intensity modulation values of the pump-field at the exit are 1.30 of LD fast axis and 1.18 of LD slow axis. The pump light can transport a distance of 8.5 mm at least with its shape preserved. The coupling system can meet the requirements of end-pumped slab amplifiers for high pump power and pump power density.

参考文献

[1] Wang Zhenguo, Ju Youlun, Wu Chunting, et al. Diode-pumped injection-seeded Tm, Ho: GdVO4 laser［J］. Laser Phys Lett, 2009, 6: 98-101.

[2] Zhang Xinlu, Wang Yuezhu, Shi Hongfeng. Diode-end-pumped CW Tm , Ho : YLF solid-state laser working at room temperature［J］. Acta Physica Sinica, 2006, 55: 1787-1792.

[3] Paync S A, Krupke W F, Orth C D. Diode-pumped solid-state lasers for inertial fusion energy［J］. J Fusion Energy, 1998, 17: 213-217.

[4] Magignan J, Marchesin B. LUCIA current status［C］//3rd International Workshop on High Energy Class Diode Pumped Solid State Lasers, 2006.

[5] Dunne M, Alexander N, Amiranoff F, et al. HiPER—Technical background and conceptual design report［DB/OL］. http: //www. hiper-laser. org, 2007.

[6] Meier W R, Abbott R, Beach R, et al. Systems modeling for the laser fusion-fission energy (LIFE) power plant［J］. Fusion Science and Technology, 2008, 56(2): 647-651.

[7] Rhodes C A. Transmittance properties of a curved specularly reflecting duct irradiated by a collimated beam［J］. Appl Opt, 1967, 6: 1767-1772.

[8] Beach R J. Theory and optimization of lens ducts［J］. Appl Opt, 1996, 35: 2005-2015.

[9] Honea E C, Beach R J, Mitchell S C, et al. High-power dual-rod Yb: YAG laser［J］. Opt Lett, 2000, 25: 805-807.

[10] Jia Wei, Hu Yongming, Li Mingzhong, et al. Simulation and design of hollow lens duct as a new kind of coupling system for high power laser diode arrays［J］. Chinese J Lasers, 2004, 31: 939-942.

[11] Duan Wentao, Jiang Dongbin, Jiang Xuejun, et al. High power laser diode arrays end-pumped efficient coupling system［J］. Chinese J Lasers, 2009, 36: 51-55.

[12] Jia Wenwu, Wang Yuefeng, Huang Feng. Beam shaping principle of hollow duct based on mirror method［J］. Acta Photonica Sinica, 2004, 37: 1756-1759.

[13] Liu Xiaojun, Fu Rulian, Qin Hua, et al. Theoretical and experimental research on lens duct for LDA coupling ［J］. Optics and Precision Engineering, 2006, 14: 167-172.

[14] Zhao Tianzhuo, Fan Zhongwei, Chen Yanan, et al. Large area laser diode stack pumping structure［J］. Chinese J Lasers, 2009, 36: 1951-1956.

王振国, 蒋新颖, 郑建刚, 严雄伟, 李明中, 李敏. 大口径端泵片状放大器的泵浦耦合系统[J]. 强激光与粒子束, 2017, 29(9): 091002. Wang Zhenguo, Jiang Xinying, Zheng Jian’gang, Yan Xiongwei, Li Mingzhong, Li Min. Coupling system for laser-diode-array end-pumped slab amplifiers[J]. High Power Laser and Particle Beams, 2017, 29(9): 091002.

大口径端泵片状放大器的泵浦耦合系统

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