| 光纤放大器中的受激布里渊散射阈值 |
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| 引用本文： | 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). |
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| 作者姓名： | 梁丽萍 常丽萍 |
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| 作者单位： | 1. 上海理工大学 理学院, 上海 200093; 2. 浙江工业大学 信息工程学院， 杭州 310023 |
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| 基金项目： | 浙江省自然科学基金项目(Y1090338) |
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| 摘 要： | 从受激布里渊散射(SBS)耦合波理论出发，根据双包层光纤放大器中的受激布里渊散射阈值模型，理论仿真了信号带宽、纤芯直径、放大器增益对SBS阈值的影响，并从实验上研究了单频百纳秒脉冲信号在掺镱双包层光纤放大器中的受激布里渊散射现象。实验中输入脉冲信号重复频率1 Hz,脉宽200 ns，对不同的输入脉冲信号放大，前向放大脉冲在脉冲能量660 nJ、峰值功率3.3 W时出现畸变，产生后向SBS窄脉冲，达到了SBS阈值，实验计算的SBS阈值与理论分析结果基本一致。
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| 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 |
| 收稿时间： | 1900-01-01; |
Stimulated Brillouin scattering threshold in fiber amplifiers |
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| Liang Liping,Chang Liping.Stimulated Brillouin scattering threshold in fiber amplifiers[J].High Power Laser and Particle Beams,2011,23(9). |
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| Authors: | Liang Liping Chang Liping |
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| Institution: | (1. College of Science, University of Shanghai for Science and Technology, Shanghai 200093, China; 2. College of Information Engineering, Zhejiang University of Technology, Hangzhou 310023, China) |
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| 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 forward ampli... |
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| Keywords: | nonlinear optics single-frequency pulse amplification stimulated Brillouin scattering threshold threshold model |
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