光斑尺寸偏差和光轴偏转对空间光混频器混频效率的影响分析

发布时间：2018-05-28 23:02

本文选题：光混频效率 + 光斑尺寸　；参考：《红外与激光工程》2017年04期

【摘要】：研究了光学元件装调加工误差引起的光斑尺寸和光轴偏转对空间光混频器混频效率的影响。推导了高斯模型下的光混频效率表达式,得到当光斑尺寸与靶面尺寸的比例为0.64时,混频效率最高。在此基础上推导了光斑尺寸偏差、光轴偏转与光混频效率的表达式。并进行仿真分析,得到光斑尺寸偏差、光轴偏转与光混频效率变化曲线。当混频效率大于10%时,光斑尺寸偏差范围为-42~250μm,光轴偏转范围为203μrad。通过计算光斑尺寸偏差和光轴偏转综合误差发现,调整光斑尺寸偏差可以改善光轴偏转带来的混频效率恶化。进一步搭建空间光混频器影响因素实验平台,进行了三种光斑尺寸偏差下光混频效率随光轴偏转变化的实验。实验所测曲线与仿真结果趋势一致,受实验器件插入损耗的影响,实验值略低于仿真值。所得影响规律为空间光混频器设计、装调和加工提供了一定参考。
[Abstract]:The effects of spot size and optical axis deflection on the mixing efficiency of spatial optical mixers caused by the fabrication error of optical components are studied. The expression of optical mixing efficiency based on Gao Si model is derived. When the ratio of spot size to target size is 0.64, the mixing efficiency is the highest. On this basis, the formula of spot size deviation, optical axis deflection and optical mixing efficiency are derived. Through simulation and analysis, the variation curves of spot size, optical axis deflection and optical mixing efficiency are obtained. When the mixing efficiency is greater than 10, the deviation range of spot size is -42o 250 渭 m, and the optical axis deflection range is 203 渭 rad. By calculating the spot size deviation and the optical axis deflection error, it is found that adjusting the spot size deviation can improve the mixing efficiency deterioration caused by the optical axis deflection. The experimental platform of the influencing factors of spatial optical mixer is built, and the optical mixing efficiency varies with the deflection of optical axis under three different light spot size deviations. The experimental curves are consistent with the simulation results, and the experimental values are slightly lower than the simulation values due to the influence of the insertion loss of the experimental devices. The influence law provides a reference for the design, installation and processing of spatial light mixer.
【作者单位】：长春理工大学光电工程学院;长春理工大学空间光电技术国家与地方联合工程研究中心;
【基金】：国家自然科学基金(91438204) 吉林省教育厅基金(2015-77) 吉林省优秀青年人才项目(20170520161JH)
【分类号】：TN929.1

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