Suppressing the stimulated Brillouin scattering in high power fiber amplifiers by dual-single-frequency amplification
Suppressing the stimulated Brillouin scattering in high power fiber amplifiers by dual-single-frequency amplification
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DOI：
10.7452/lapl.201210025
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发表时间：
2012-05
影响因子：
1.7
通讯作者：
J. Leng;X. Wang;H. Xiao;P. Zhou;Y. Ma;S. F. Guo;X. Xu
中科院分区：
文献类型：
--
作者：
J. Leng;X. Wang;H. Xiao;P. Zhou;Y. Ma;S. F. Guo;X. Xu
研究了双单频放大对高功率光纤放大器中受激布里渊散射的抑制作用。在种子中心波长分别为1063.7 nm和1064.4 nm的全光纤结构中，双单频光纤放大器的输出功率提高到275W。功率转换效率为76.6%。最大输出功率受泵浦功率的限制，即使在最高输出功率下也没有检测到明显的受激布里渊散射。实验研究了传输光纤长度、光输出光谱和激光偏振等因素对激光输出的影响。在放大过程中保持两个单频信号的相对幅度，双单频放大器的最大输出功率可以比单频放大提高2倍以上。
We demonstrate the suppression of stimulated Brillouin scattering (SBS) in high power fiber amplifiers by a dual-single-frequency amplification. The output power of dual-single-frequency fiber amplifiers in all-fiber configuration is boosted to 275 W with seeds central wavelength of 1063.7 and 1064.4 nm, respectively. The power conversion efficiency is 76.6%. The maximum output power is limited by the pump power and no significant SBS has been detected even at the highest output power. The effect of the delivery fiber length, the optical output spectra and polarization of the amplified laser are also studied experimentally. The relative magnitude of the two single-frequency signals is maintained in the amplification process and the maximal output power of dual-single-frequency amplifiers can be increased by a factor of more than 2 compared with single-frequency amplification.