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基于双光栅的超窄线宽光谱滤波技术

Ultra-Narrow Linewidth Spectral Filtering Technology Based on Double Gratings

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摘要

基于双多层介质膜衍射(MLD)光栅的超窄带光谱滤波系统可以获得普通窄带滤光片无法实现的亚纳米级超窄光谱滤波宽度, 利用该系统有望极大地提高激光回光探测系统的信噪比和抗干扰能力。设计了一套基于双MLD色散补偿光栅的超窄带光谱滤波系统, 使用CODE V软件对系统像差进行理论仿真, 发现系统像差可忽略不计; 使用Matlab软件对系统的滤波线宽和有效能量透过率进行理论仿真, 为解决实际滤波问题时, 根据实际需求选择最优系统结构参数提供了较完整的理论基础。最后, 在实验室采用国产多层介质膜光栅, 在1064 nm中心波长段, 成功将光谱半峰全宽(FWHM)为0.3 nm的入射激光转换为光谱FWHM为0.03 nm的出射激光。

Abstract

The ultra-narrow band spectrum filtering system based on double multi-layer dielectric (MLD) coating diffraction gratings can achieve the sub-nanometer scale ultra-narrow spectral filter width that cannot be realized by common narrow band filter. Using this system may greatly improve the signal-to-noise ratio and anti-jamming ability of laser light echo detection system. An ultra-narrow band spectral filter system based on dual MLD dispersion compensation gratings is designed, and theoretical simulation of the system aberration is made using CODE V software. The result shows that the system aberration can be ignored. Also, theoretical simulation of the filtering linewidth and effective energy transmittance of the system is made by Matlab software, which provides a relatively complete theoretical basis for choosing the optimal structure parameters to solve the actual filtering problem in actual situation. Finally, by using domestic multi-layer film dielectric gratings in the laboratory, we successfully transform the input laser with spectrum full-width at half-maxima (FWHM) of 0.3 nm into the output laser spectrum FWHM of 0.03 nm, which is at center wavelength band of 1064 nm.

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中图分类号:O436

DOI:10.3788/CJL201744.0811003

所属栏目:光谱学

基金项目:中国工程物理研究院高能激光科学与技术重点实验室基金

收稿日期:2016-11-23

修改稿日期:2017-04-19

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作者单位    点击查看

许 放:中国工程物理研究院应用电子学研究所, 四川 绵阳 621900中国工程物理研究院研究生院, 北京 100088
颜 宏:中国工程物理研究院应用电子学研究所, 四川 绵阳 621900
张永红:中国工程物理研究院应用电子学研究所, 四川 绵阳 621900
万 敏:中国工程物理研究院应用电子学研究所, 四川 绵阳 621900

联系人作者:许放(772547351@qq.com)

备注:许 放(1992-), 男, 硕士研究生, 主要从事空间激光探测技术方面的研究。

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引用该论文

Xu Fang,Yan Hong,Zhang Yonghong,Wan Min. Ultra-Narrow Linewidth Spectral Filtering Technology Based on Double Gratings[J]. Chinese Journal of Lasers, 2017, 44(8): 0811003

许 放,颜 宏,张永红,万 敏. 基于双光栅的超窄线宽光谱滤波技术[J]. 中国激光, 2017, 44(8): 0811003

被引情况

【1】许放,万敏,颜宏,张永红,谢庚承. 应用于激光回光探测的高效窄带光栅光谱滤波技术. 中国激光, 2018, 45(10): 1005002--1

【2】李俊纬,倪屹,郭瑜,张啸天,钟道鸿,樊俊星. 基于凹面光栅的特定蛋白分析仪结构设计及性能分析. 光学学报, 2019, 39(8): 830002--1

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