| FUNDAMENTAL AREAS OF PHENOMENOLOGY(INCLUDING APPLICATIONS) |
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Coherent Beam Combination of Three Fiber Amplifiers with Multi-dithering Technique |
| MA Yan-Xing, LIU Ze-Jin, ZHOU Pu, WANG Xiao-Lin, MA Hao-Tong, LI Xiao, XU Xiao-Jun, SI Lei |
| College of Optoelectric Science and Engineering, National University of Defense Technology, Changsha 410073 |
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| Cite this article: |
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MA Yan-Xing, LIU Ze-Jin, ZHOU Pu et al 2009 Chin. Phys. Lett. 26 044204 |
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Abstract Coherent beam combination of three W-level fiber amplifiers with multi-dithering technique is demonstrated. The multi-dithering technique is used for phase control in two channels. In the experiment, two channels are modulated by sine wave with 70kHz and 100kHz respectively, and two regular commercial DSP lock-in amplifiers and an industrial computer are used for electric signal processing in the feedback loop. The fringe contrast is advanced from 12% to 81%, and 78% coherent combination efficiency is obtained when the feedback loop is closed.
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| Keywords:
42.55.Wd
42.25.Kb
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Received: 21 July 2008
Published: 25 March 2009
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