全光纤Mach-Zehnder干涉仪的多普勒测风激光雷达鉴频技术研究

项目名称： 全光纤Mach-Zehnder干涉仪的多普勒测风激光雷达鉴频技术研究

项目编号： No.61205189

项目类型： 青年科学基金项目

立项/批准年度： 2013

项目学科： 信息四处

项目作者： 汪丽

作者单位： 西安理工大学

项目金额： 29万元

中文摘要： 大气风场是研究大气动力学的重要参数，非相干多普勒激光雷达已成为大气风场探测的重要手段。项目提出并构建高透过率、宽视场、大光通量、高稳定性的全光纤Mach-Zehnder(M-Z)干涉鉴频的多普勒测风激光雷达技术，重点研究光纤M-Z 鉴频器的激光雷达大气风场探测理论与方法、鉴频器参数优化设计、光纤耦合与光纤杂散光的隔离等关键技术。针对532nm波长激光，研究不同耦合方式下望远镜与单模光纤的耦合效率，获得最佳耦合方式；基于风场探测理论及先进光学设计方法，优化光纤M-Z干涉仪的鉴频参数及设计方法，获取最佳风场探测效率。利用现有实验室条件搭建一套全光纤M-Z干涉鉴频的多普勒测风激光雷达实验系统，并开展实验研究，获取最佳系统设计方案。本项目提出的光纤M-Z干涉仪可对紫外到近红外波段的激光鉴频，研究成果将为未来小型多普勒测风雷达的发展、空基或星基平台测风激光雷达技术的研究及发展提供新的技术及方法。

中文关键词： 光纤Mach-Zehnder干涉仪；设计与优化；大气风场模拟；多普勒激光雷达；

英文摘要： Atmospheric wind field is an important parameter to study the atmospheric dynamics, and the incoherent Doppler wind lidar with directly frequency discriminator detection has become an important means for obtaining the atmospheric wind field information. The aim of the project is to study the Doppler wind lidar technology using all-fiber Mach-Zehnder (M-Z) interference frequency discriminator, which has feature of a high transmittance, wide field of view, a large luminous flux, high stability and small size. The research is mainly focused on the detection theories and methods of atmospheric wind lidar with fiber M-Z frequency discriminator, and the key technologies of the parameter optimization design of the frequency discriminator, fiber-coupled technology， stray light isolation and so on. Using the laser wavelength of 532nm, the coupling efficiency of telescope with single-mode fiber is studied to obtain the optimal coupling method by considered the different coupling mode ; the wind field detection theory is used to optimize the frequency discriminator parameters of the fiber M-Z interferometer for obtaining the best detection efficiency of the wind field. The advanced optical design means are used to optimize the system design of frequency discriminator for obtaining the optimal parameters and design methods.

英文关键词： Fiber Mach-Zehnder interferometer；Design and optimization；Atmospheric wind velocity simulation；Doppler lidar；