基于双光栅的超窄线宽光谱滤波技术

发布时间：2018-06-22 02:02

本文选题：光谱学 + 光谱滤波　；参考：《中国激光》2017年08期

【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1064nm中心波长段,成功将光谱半峰全宽(FWHM)为0.3nm的入射激光转换为光谱FWHM为0.03nm的出射激光。
[Abstract]:The ultra-narrow band spectral filtering system based on double multilayer dielectric film diffraction (MLD) grating can obtain the sub-nanoscale ultra-narrow spectral filter width that ordinary narrow band filter cannot realize. The system is expected to greatly improve the signal-to-noise ratio (SNR) and anti-jamming ability of the laser backlight detection system. An ultra-narrow band spectral filtering system based on double MLD dispersion compensation grating is designed. The aberration of the system is simulated by code V software, and it is found that the aberration of the system is negligible. The theoretical simulation of the filtering linewidth and effective energy transmittance of the system is carried out by using Matlab software, which provides a complete theoretical basis for selecting the optimal system structure parameters according to the actual demand when solving the problem of practical filtering. Finally, at the center wavelength of 1064nm, the incident laser with half width of spectral peak (FWHM) as 0.3nm is converted into an outgoing laser with spectrum FWHM as 0.03nm at the center wavelength of 1064nm using domestic multilayer dielectric film grating.
【作者单位】：中国工程物理研究院应用电子学研究所;中国工程物理研究院研究生院;
【基金】：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
【分类号】：TN25;TN713

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