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1.5 kW incoherent beam combining of four fiber lasers using adaptive fiber-optics collimators
Geng, Chao1; Zhao, Baoyin2; Zhang, Entao2; Luo, Wen1; Tan, Yi1; Zhu, Yonggang2; Yang, Hening2; Mu, Jinbo1; Li, Xinyang1; Duan, Kailiang2; Zhao, Wei2
Source PublicationIEEE Photonics Technology Letters
Volume25Issue:13Pages:1286-1289
2013
Language英语
ISSN10411135
DOI10.1109/LPT.2013.2263123
Indexed BySCI ; Ei
WOS IDWOS:000322372900016
Subtype期刊论文
AbstractWe 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.; 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.
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Document Type期刊论文
Identifierhttp://ir.ioe.ac.cn/handle/181551/6347
Collection自适应光学技术研究室(八室)
Affiliation1. 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
GB/T 7714
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.
APA Geng, Chao.,Zhao, Baoyin.,Zhang, Entao.,Luo, Wen.,Tan, Yi.,...&Zhao, Wei.(2013).1.5 kW incoherent beam combining of four fiber lasers using adaptive fiber-optics collimators.IEEE Photonics Technology Letters,25(13),1286-1289.
MLA Geng, Chao,et al."1.5 kW incoherent beam combining of four fiber lasers using adaptive fiber-optics collimators".IEEE Photonics Technology Letters 25.13(2013):1286-1289.
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