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高斯光束的传输特性对法布里-珀罗标准具分光的激光雷达影响

Effect of Propagation Properties of Gaussian Beam on Fabry-Perot Etalon in Lidar

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摘要

高斯光束的传播特性直接影响激光雷达大气回波信号的发散角,进而影响法布里-珀罗标准具(FPE)的光学特性。从高斯光束的FPE三维干涉环分析,得到发散角小的高斯光束有利于获得能量较高的FPE零级或一级干涉环。探讨了高斯光束品质因子M2和准直倍率对不同高度的激光大气回波信号的影响。数值计算结果表明,FPE对大气回波信号的透射率与高度的变化有关,在近场变化明显,在远场相对稳定;且对特定高度大气回波信号的FPE透射率随着光束品质因子M2的增大而降低,随着准直倍率的放大而增强。所以应设计和选择具有较高准直倍率的准直发射系统和具有较低光束品质因子M2的激光光束,来提高FPE的透射率,同时对以FPE分光的激光雷达的近场回波信号进行FPE透射率校正,以改善激光雷达系统的测量误差。

Abstract

The beam divergence angle of lidar returned signals which is directly influenced by propagation properties of Gaussian beam affects the properties of Fabry-Perot etalon (FPE). In this paper, the three-dimensional interference rings of Gaussian beam are investigated and manifested to some trend. Gaussian beam with small divergence may be propitious to obtain higher energy of FPE zero-order or first-order interference ring. For a lidar system, the effects of beam quality factor M2 and expander coefficient on returned signals are discussed. The numerical results indicate that FPE transmission is changed clearly with the height in the near field and leveled off in the far field, and at a given height, it decreases with the enhance of the value of M2 and increases with the expander. It is supposed that laser with lower beam quality factor M2 and the transmitter with higher expander coefficient are chosen and developed to improve FPE transmission and in the near field decrease the measurement error in lidar using an FPE as spectroscope, which is expected to supply numerical foundation for the lidar system.

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中图分类号:TN958.98

DOI:10.3788/cjl20103712.3013

所属栏目:光束传输

责任编辑:李文喆  信息反馈

基金项目:国家973计划(2009CB426302)和国家自然科学基金(60878050)资助课题

收稿日期:2010-01-25

修改稿日期:2010-04-16

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王玉峰:西安理工大学机械与精密仪器工程学院, 陕西 西安 710048
华灯鑫:西安理工大学机械与精密仪器工程学院, 陕西 西安 710048
毛建东:西安理工大学机械与精密仪器工程学院, 陕西 西安 710048北方民族大学电气信息工程学院, 宁夏 银川 750021

联系人作者:王玉峰(wangyufeng@xaut.edu.cn)

备注:王玉峰(1979—),女,讲师,博士研究生,主要从事激光雷达遥感探测技术方面的研究

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引用该论文

Wang Yufeng,Hua Dengxin,Mao Jiandong. Effect of Propagation Properties of Gaussian Beam on Fabry-Perot Etalon in Lidar[J]. Chinese Journal of Lasers, 2010, 37(12): 3013-3018

王玉峰,华灯鑫,毛建东. 高斯光束的传输特性对法布里-珀罗标准具分光的激光雷达影响[J]. 中国激光, 2010, 37(12): 3013-3018

被引情况

【1】蒋呈阅,蔡瑞,刘劲松,王可嘉,汪盛烈. 金属网栅法布里珀罗干涉仪测量太赫兹波波长. 光学学报, 2012, 32(11): 1112009--1

【2】宋伟,陶世荃,王大勇,万玉红. 自由基聚合型光致聚合物中全息图像质量的动态特性研究. 光学学报, 2012, 32(12): 1209001--1

【3】樊燚,林兆祥,程学武,詹伟强. 基于法布里-珀罗干涉仪的脉冲激光谱型测量. 中国激光, 2018, 45(8): 804006--1

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