Mutual injection-locking of two double-clad fibers for coherent beam combining with corner cube

Rui Zheng; Lixin Xu; Yang Liu; Kun Gao; Yong Cheng; Hai Ming

doi:10.1117/12.837892

24 November 2009 Mutual injection-locking of two double-clad fibers for coherent beam combining with corner cube

Rui Zheng, Lixin Xu, Yang Liu, Kun Gao, Yong Cheng, Hai Ming

Proceedings Volume 7509, 2009 International Conference on Optical Instruments and Technology: Optoelectronic Devices and Integration; 75090M (2009) https://doi.org/10.1117/12.837892
Event: International Conference on Optical Instrumentation and Technology, 2009, Shanghai, China

Abstract

We experimentally demonstrate coherent beam combination of two double-clad fiber lasers using mutual injectionlocking in an external cavity coupling structure. The configuration employs a corner cube as a mutual injection component to couple the two lasers. A beam splitter acts as the output coupler and far field intensity has been observed at the lens focus plane. We observe interferential fringes with the contrast ratio of 0.5, and a combination efficiency of 80% is achieved. The total output power exceeds 11 W. We present simulative discussion here on the influence of multitransversal modes of element beam. The multi-mode operation degrades the quality of the output beam of main peak power, fringe contrast ratio, and other parameters. The configuration has the potential to scale to more lasers without much structural modification.

Citation Download Citation

Rui Zheng, Lixin Xu, Yang Liu, Kun Gao, Yong Cheng, and Hai Ming "Mutual injection-locking of two double-clad fibers for coherent beam combining with corner cube", Proc. SPIE 7509, 2009 International Conference on Optical Instruments and Technology: Optoelectronic Devices and Integration, 75090M (24 November 2009); https://doi.org/10.1117/12.837892

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