强激光与粒子束2011，Vol.23Issue(9)：2405-2408,4.DOI:10.3788/HPLPB20112309.02405
光纤放大器中的受激布里渊散射阈值
Stimulated Brillouin scattering threshold in fiber amplifiers
摘要
Abstract
Based on the wave coupling theory and the evolution model of the critical pump power (or Brillouin threshold) for stimulated Brillouin scattering(SBS) in double-clad fiber amplifiers, the influence of signal bandwidth, fiber-core diameter and amplifier gain on SBS threshold is simulated theoretically. And experimental measurements of SBS are presented in ytterbium-doped double-clad fiber amplifiers with single-frequency hundred nanosecond pulse amplification. Under different input signal pulses, the fqrward amplified pulse distortion is observed when the pulse energy is up to 660 Nj and the peak power is up to 3. 3 W in the pulse amplification with pulse duration of 200 ns and repetition rate of 1 Hz. And the backward SBS narrow pulse appears. The pulse peak power equals to SBS threshold. Good agreement is shown between the modeled and experimental data.关键词
非线性光学/单频脉冲放大/受激布里渊散射阈值/阈值模型Key words
nonlinear optics/ single-frequency pulse amplification! Stimulated Brillouin scattering threshold) threshold model分类
信息技术与安全科学引用本文复制引用
梁丽萍,常丽萍..光纤放大器中的受激布里渊散射阈值[J].强激光与粒子束,2011,23(9):2405-2408,4.基金项目
浙江省自然科学基金项目(Y1090338) （Y1090338）
