Acta Optica Sinica, Volume. 30, Issue 7, 2027(2010)
Experimental Study on Linewidth Requirement for Coherent Beam Combination of Fiber Amplifiers in MOPA Configuration
Single-frequency radiation is often considered to be indispensable for coherent beam Combination (CBC) of fiber amplifiers in master oscillator power amplifier (MOPA) configuration. Nevertheless,the single-frequency radiation limits the output power of each single fiber gain due to low stimulated Brillouin scattering (SBS) threshold. Wide linewidth and multi-wavelength radiations are two effective approaches to mitigate SBS effects in fiber amplifiers. Coherent beam combination of three wide-linewidth fiber amplifiers and three multi-wavelength fiber amplifiers are both experimentally demonstrated using stochastic parallel gradient descents (SPGD) algorithm. The experimental results show that single radiation is not indispensable for CBC in MOPA configuration,the application of wide-linewidth and multi-wavelength amplifiers present the potential in achieving a much higher output power in MOPA configuration.
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Zhou Pu, Ma Yanxing, Wang Xiaolin, Ma Haotong, Xu Xiaojun, Liu Zejin. Experimental Study on Linewidth Requirement for Coherent Beam Combination of Fiber Amplifiers in MOPA Configuration[J]. Acta Optica Sinica, 2010, 30(7): 2027
Category: Lasers and Laser Optics
Received: Jul. 15, 2009
Accepted: --
Published Online: Jul. 13, 2010
The Author Email: Pu Zhou (jnck621@163.com)