| 高功率纳秒光脉冲在单模光纤中的受激喇曼散射及抑制研究 |
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| 引用本文： | 李亚滨,贾东方,庞松涛,刘洋,赵川,王肇颖,葛春风,李世忱.高功率纳秒光脉冲在单模光纤中的受激喇曼散射及抑制研究[J].光子学报,2009,38(12). |
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| 作者姓名： | 李亚滨 贾东方 庞松涛 刘洋 赵川 王肇颖 葛春风 李世忱 |
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| 作者单位： | 天津大学,精密仪器与光电子工程学院,光电信息技术科学教育部重点实验室,天津,300072 |
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| 基金项目： | 国家自然科学基金，天津市科技发展基金，天津大学青年教师基金 |
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| 摘 要： | 利用包含喇曼增益、抽运消耗、自相位调制、交叉相位调制和群速度色散效应的耦合非线性薛定谔方程组,对千瓦级高功率纳秒脉冲在单模光纤中的传输特性进行了模拟计算.分析了输入脉冲和斯托克斯脉冲的演化过程,研究了大模面积光纤对受激喇曼散射的抑制作用.研究结果表明,采用模面积为530 μm~2的光子晶体光纤作为惯性约束聚变脉冲整形系统的传输介质,能有效抑制受激拉曼散射,不但信号衰减较小,而且中心凹陷程度较低.
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| 关 键 词： | 高功率纳秒脉冲 受激喇曼散射 大模面积光纤 非线性 |
Stimulated Raman Scattering and Its Suppression in a Single-mode Fiber Induced by High-power Nanosecond Optical Pulse |
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| LI Ya-bin,JIA Dong-fang,PANG Song-tao,LIU Yang,ZHAO Chuan,WANG Zhao-ying,GE Chun-feng,LI Shi-chen.Stimulated Raman Scattering and Its Suppression in a Single-mode Fiber Induced by High-power Nanosecond Optical Pulse[J].Acta Photonica Sinica,2009,38(12). |
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| Authors: | LI Ya-bin JIA Dong-fang PANG Song-tao LIU Yang ZHAO Chuan WANG Zhao-ying GE Chun-feng LI Shi-chen |
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| Abstract: | The influence of stimulated Raman scattering (SRS) on high-power (peak power ～1 000 W) pulse with a pulse-width of ～1 ns propagating in a single-mode fiber is investigated numerically by solving coupled nonlinear Schrdinger equations including Raman gain,pump depletion,self-phase modulation,cross-phase modulation and group velocity dispersion.The evolution of input pulse and Stokes pulse is analyzed,and suppression of SRS using large mode area fiber is shown.The results show that SRS can be suppressed effectively when using photonic crystal fiber (PCF) as transmission medium for inertial confined fusion (ICF).Compared to conventional single-mode fiber,the signal loss is smaller,and the central-dip in output pulse is lower. |
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| Keywords: | High-power nanosecond optical pulse Stimulated Raman scattering Large mode area fiber Nonlinearity |
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