论文部分内容阅读
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。
The ultra-narrow band spectral filtering system based on double multi-layer dielectric film diffraction (MLD) grating can obtain sub-nanometer ultra-narrow spectral filtering width which can not be achieved by common narrow-band filters. It is expected that the system will greatly enhance the signal of laser return light detection system Noise ratio and anti-interference ability. A set of ultra-narrowband spectral filtering system based on dual MLD dispersion compensation grating was designed. The system aberration was simulated by CODE V software and the system aberration was neglected. Using Matlab software, the filter bandwidth and effective energy To rate the theoretical simulation, in order to solve the actual filtering problem, according to the actual needs of the optimal system structure parameters to provide a more complete theoretical basis. Finally, the domestic multi-layer dielectric film grating was used in the laboratory to convert the incident laser with the FWHM of 0.3nm into the outgoing laser with the FWHM of 0.03nm at the center wavelength of 1064nm.