用于CARS激发源的全光纤飞秒脉冲谱压缩

发布时间：2018-03-04 18:12

本文选题：非线性光纤光学　切入点：光纤预啁啾　出处：《物理学报》2017年20期 　论文类型：期刊论文

【摘要】：进行了基于光纤预啁啾和自相位调制的多模/单模组合式全光纤啁啾谱压缩研究.提出利用多模光纤模式估计群速度色散均值的方法,并将该估计值作为啁啾参量分析的计算参数,仿真计算了50/125μm折射率渐变多模光纤的群速度色散均值及其与单模光纤在不同长度比值下的光谱压缩效果.采用三种折射率渐变多模光纤进行实验,对比分析了折射率渐变多模光纤的芯径大小及其与单模光纤的长度比值对光谱压缩效果的影响.实验结果表明使用50/125μm折射率渐变多模光纤获得光谱最大压缩比为5.796,谱宽为2.243 nm,与理论仿真一致;使用105/125μm折射率渐变多模光纤,可进一步提高压缩比至152.941,输出谱宽为0.085 nm的光脉冲.将此脉冲用于相干反斯托克斯拉曼散射光谱探测,理论光谱分辨率可达1.386 cm~(-1).
[Abstract]:The compression of multimode / single-mode all-fiber chirp spectrum based on fiber pre-chirp and self-phase modulation is studied. A multimode fiber mode estimation method is proposed to estimate the mean value of group velocity dispersion. The estimated value is used as the computational parameter for the analysis of chirp parameters. The mean value of group velocity dispersion of 50/125 渭 m refractive index graded multimode fiber and its spectral compression effect at different length ratio to single mode fiber are simulated and calculated. Three kinds of refractive index graded multimode fiber are used to carry out experiments. The effect of the core diameter of graded refractive index multimode fiber and the ratio of the length of the fiber to the single mode fiber on the spectral compression effect is analyzed. The experimental results show that the maximum spectral compression ratio of 50/125 渭 m graded multimode fiber is obtained. 5.796, the spectrum width is 2.243 nm, which is consistent with the theoretical simulation. Using 105/125 渭 m refractive index graded multimode fiber, the compression ratio can be further increased to 152.941 and the output spectrum width is 0.085 nm. The theoretical spectral resolution of this pulse for coherent anti-Stokes Raman scattering detection can reach 1.386 cm ~ (-1) ~ (-1).
【作者单位】：天津大学精密仪器与光电子工程学院水利工程仿真与安全国家重点实验室光电信息技术科学教育部重点实验室光纤传感研究所天津市光纤传感工程中心;
【基金】：国家自然科学基金(批准号:61378043,61675152,61227011,61475114,61505139) 国家重大科学仪器设备开发专项(批准号:2013YQ030915) 天津市自然科学基金(批准号:13JCYBJC16200) 深圳市科技创新委员会项目(批准号:JCYJ20120831153904083)资助的课题~~
【分类号】：TN253

【相似文献】