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题名:
1.5 kW incoherent beam combining of four fiber lasers using adaptive fiber-optics collimators
作者: Geng, Chao1; Zhao, Baoyin2; Zhang, Entao2; Luo, Wen1; Tan, Yi1; Zhu, Yonggang2; Yang, Hening2; Mu, Jinbo1; Li, Xinyang1; Duan, Kailiang2; Zhao, Wei2
刊名: IEEE Photonics Technology Letters
出版日期: 2013
卷号: 25, 期号:13, 页码:1286-1289
学科分类: Fiber lasers - Fiber optics - Gradient methods - Single mode fibers
DOI: 10.1109/LPT.2013.2263123
文章类型: 期刊论文
中文摘要: We demonstrate the incoherent beam combining (BC) of four high-power single-mode fiber lasers. Adaptive fiber-optics collimators (AFOC) of 0.5 kW-level are developed to correct the tip/tilt-type phase errors among beamlets. The maximum deflection angle of the AFOC is about 0.29 mrad. A stochastic parallel gradient descent algorithm is employed as the tip/tilt control strategy. The tip/tilt control makes four separate laser beams overlap with each other in the far-field, and the average of normalized power-in-bucket increases from 0.171 in open loop to 0.798 in closed loop when 1.5-kW total output power is achieved. The precise tracking ability and control accuracy of this BC system are investigated. Experimental results expose that thermal-blooming effect disturbs BC seriously when the total output power is up to kW-level, which could be mitigated by inducing air flow near the laser output. © 1989-2012 IEEE.
英文摘要: We demonstrate the incoherent beam combining (BC) of four high-power single-mode fiber lasers. Adaptive fiber-optics collimators (AFOC) of 0.5 kW-level are developed to correct the tip/tilt-type phase errors among beamlets. The maximum deflection angle of the AFOC is about 0.29 mrad. A stochastic parallel gradient descent algorithm is employed as the tip/tilt control strategy. The tip/tilt control makes four separate laser beams overlap with each other in the far-field, and the average of normalized power-in-bucket increases from 0.171 in open loop to 0.798 in closed loop when 1.5-kW total output power is achieved. The precise tracking ability and control accuracy of this BC system are investigated. Experimental results expose that thermal-blooming effect disturbs BC seriously when the total output power is up to kW-level, which could be mitigated by inducing air flow near the laser output. © 1989-2012 IEEE.
收录类别: SCI ; Ei
项目资助者: National Natural Science Foundation of China [61138007, 61205069]
语种: 英语
WOS记录号: WOS:000322372900016
ISSN号: 10411135
Citation statistics:
内容类型: 期刊论文
URI标识: http://ir.ioe.ac.cn/handle/181551/6347
Appears in Collections:自适应光学技术研究室(八室)_期刊论文

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作者单位: 1. Institute of Optics and Electronics, Chinese Academy of Sciences, Chengdu 610209, China
2. Xiàn Institute of Optics and Precision Mechanics, Chinese Academy of Sciences, Xiàn 710119, China

Recommended Citation:
Geng, Chao,Zhao, Baoyin,Zhang, Entao,et al. 1.5 kW incoherent beam combining of four fiber lasers using adaptive fiber-optics collimators[J]. IEEE Photonics Technology Letters,2013,25(13):1286-1289.
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