光学学报, 2021, 41 (3): 0336001, 网络出版: 2021-02-28  

基于超连续谱的可调谐同步脉冲产生及噪声分析 下载: 1119次

Generation and Noise Analysis of Tunable Synchronized Pulse Based on Supercontinuum
作者单位
1 上海理工大学光电信息与计算机工程学院, 上海 200093
2 华东师范大学精密光谱科学与技术国家重点实验室, 上海 200062
3 华东师范大学重庆研究院, 重庆 401121
4 济南量子技术研究院, 山东 济南 250101
摘要
实验研究了基于超连续谱滤波的可调谐双色同步皮秒脉冲产生技术,将全保偏掺铒锁模光纤激光器输出的脉冲分为两路,其中一路耦合到高非线性光纤,获得了覆盖掺镱光纤发射谱带的超连续谱,通过结合窄带可调谐滤波器和全保偏掺镱放大器,实现了平均功率为70 mW,脉冲宽度为4.0 ps,中心波长为1025~1055 nm的可调谐脉冲。掺铒光纤激光器的另一路输出光经过窄带滤波器和掺铒光纤放大器,实现了中心波长为1580 nm,平均功率为200 mW,脉冲宽度为4.2 ps的激光输出。上述基于超连续谱滤波的可调谐双色皮秒脉冲具有良好的同步特性,可以作为相干反斯托克斯拉曼散射的泵浦光和斯托克斯光。研究发现,选取超连续谱平坦位置的光谱成分作为掺镱放大器的种子光时,脉冲幅值及平均功率抖动更小,相对强度噪声更低。
Abstract
A tunable dual-color synchronized picosecond pulse generation technique based on supercontinuum filtering is experimentally studied. The output pulse of an all-polarization-maintaining Er-doped fiber laser is divided into two channels, one of which is coupled to the highly nonlinear fiber, and the supercontinuum covering the emission band of Yb-doped fiber is obtained. With the combination of a narrow-band tunable filter with an all-polarization-maintaining Yb-doped amplifier, a tunable laser output with average power of 70 mW, pulse duration of 4.0 ps, and central wavelength of 1025--1055 nm is achieved. The other output of the Er-doped fiber laser passes through the narrow-band filter and the Er-doped fiber amplifier to generate a laser output with average power of 200 mW, pulse duration of 4.2 ps, and central wavelength of 1580 nm. The above tunable two-color picosecond pulse based on supercontinuum filtering possesses good synchronization characteristics and can be used as pump light and Stokes light for coherent anti-Stokes Raman scattering. It is found that the fluctuations of pulse amplitude and average power are smaller and the relative intensity noise is lower when the spectral components at flat positions of supercontinuum are selected as the seed light of the Yb-doped amplifier.

王庆婷, 杨康文, 沈悦, 陈旭, 郝强, 黄坤, 曾和平. 基于超连续谱的可调谐同步脉冲产生及噪声分析[J]. 光学学报, 2021, 41(3): 0336001. Qingting Wang, Kangwen Yang, Yue Shen, Xu Chen, Qiang Hao, Kun Huang, Heping Zeng. Generation and Noise Analysis of Tunable Synchronized Pulse Based on Supercontinuum[J]. Acta Optica Sinica, 2021, 41(3): 0336001.

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