ELECTROMAGNETISM, OPTICS, ACOUSTICS, HEAT TRANSFER, CLASSICAL MECHANICS, AND FLUID DYNAMICS |
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330-W single-frequency retrievable multi-tone monolithic fiber amplifier |
Wang Xiao-Lin (王小林), Zhou Pu (周朴), Leng Jin-Yong (冷进勇), Du Wen-Bo (杜文博), Xu Xiao-Jun (许晓军) |
College of Optoelectronic Science and Engineering, National University of Defense Technology, Changsha 410073, China |
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Abstract A single-frequency retrievable phase modulated multi-tone fiber amplifier is presented in theory and demonstrated in experiment. A multi-tone seed laser generated by a sine wave phase modulated single-frequency laser is employed for stimulated Brillouin scattering suppression in all-fiber amplifier. A demodulation signal which is π phase shifted with respect to the modulation signal is used to retrieve the single-frequency laser from the multi-tone laser. In experiment, we first optimize the all-fiber master-oscillator power-amplifier. With this amplifier, we demonstrate a single-frequency retrievable multi-tone laser with 330-W output when driven by the multi-tone seed, while the ultimate output power is only 130 W when driven by the single-frequency laser. Then, we carry out an experiment for retrieving single-frequency laser from the amplified multi-tone laser. Results indicate that the single-frequency laser can be retrieved with a sideband suppression of more than 20 dB. Retrieving an even higher power single-frequency laser is possible if a high power demodulator is available.
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Received: 30 June 2012
Revised: 22 August 2012
Accepted manuscript online:
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PACS:
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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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Fund: Project supported by the New Century Excellent Talents in University, Ministry of Education of China and the Scientific Research Project in National University Defense of Technology. |
Corresponding Authors:
Wang Xiao-Lin
E-mail: wxllin@nudt.edu.cn
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Cite this article:
Wang Xiao-Lin (王小林), Zhou Pu (周朴), Leng Jin-Yong (冷进勇), Du Wen-Bo (杜文博), Xu Xiao-Jun (许晓军) 330-W single-frequency retrievable multi-tone monolithic fiber amplifier 2013 Chin. Phys. B 22 044205
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