| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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High Power Passive Phase Locking of Four Yb-Doped Fiber Amplifiers by an All-Optical Feedback Loop |
| XUE Yu-Hao1,2, HE Bing1**, ZHOU Jun1***, LI Zhen1,2, FAN Yuan-Yuan1,2, QI Yun-Feng1, LIU Chi1, YUAN Zhi-Jun1, ZHANG Hai-Bo1,2, LOU Qi-Hong1
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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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XUE Yu-Hao, HE Bing, ZHOU Jun et al 2011 Chin. Phys. Lett. 28 054212 |
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Abstract We report the passive phase locking of four high power Yb-doped fiber amplifiers with ring cavity. The interference patterns at different output power are observed and the Strehl ratios are measured. The maximum coherent output power of the fiber array is up to 1062 W by multi-stage amplification. The stable beam profiles of various phase relationships are observed by controlling the position of the feedback fiber, in good agreement with the calculated results. By using master oscillator power-amplifier (MOPA) architecture and broadband operation of passively phased systems, higher power scaling with high beam quality appears to be feasible.
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| Keywords:
42.55.Wd
42.60.Da
42.60.Fc
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Received: 04 March 2011
Published: 26 April 2011
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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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