| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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The Improved Power of the Central Lobe in the Beam Combination and High Power Output |
| LIU Hou-Kang1,2,XUE Yu-Hao1,2,LI Zhen1,2,HE Bing1**,ZHOU Jun1**,DING Ya-Qian1,2,JIAO Meng-Li1,2,LIU Chi1,QI Yun-Feng1,WEI Yun-Rong1,DONG Jing-Xing1,LOU Qi-Hong1 |
1Shanghai Key Laboratory of All Solid-State Laser and Applied Techniques, Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai 201800
2Graduate University of Chinese Academy of Sciences, Beijing 100049 |
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| Cite this article: |
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LIU Hou-Kang, XUE Yu-Hao, LI Zhen et al 2012 Chin. Phys. Lett. 29 044204 |
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Abstract In order to increase the power fraction of the central lobe in the coherent beam combination of lasers in an array, the effects of the distance factor of near-field distribution on far-field interference patterns are calculated and demonstrated experimentally. An improved beam array of interwoven distribution is demonstrated to enable the power in the central lobe to reach 41%. An optimized mirror array is carefully designed to obtain a high duty ratio, which is up to 53.3% at a high power level. By using these optimized methods and designs, the passive phase locking of eight Yb-doped fiber amplifiers with ring cavities are obtained, and a pleasing interference pattern with 87% visibility is observed. The maximum coherent output power of the system is up to 1066 W.
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Received: 31 October 2011
Published: 04 April 2012
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| PACS: |
42.55.Wd
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(Fiber lasers)
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42.60.Da
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(Resonators, cavities, amplifiers, arrays, and rings)
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42.60.Fc
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(Modulation, tuning, and mode locking)
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