本文選題：光混頻效率 + 光斑尺寸��； 參考：《紅外與激光工程》2017年04期

【摘要】：研究了光學(xué)元件裝調(diào)加工誤差引起的光斑尺寸和光軸偏轉(zhuǎn)對空間光混頻器混頻效率的影響。推導(dǎo)了高斯模型下的光混頻效率表達(dá)式,得到當(dāng)光斑尺寸與靶面尺寸的比例為0.64時,混頻效率最高。在此基礎(chǔ)上推導(dǎo)了光斑尺寸偏差、光軸偏轉(zhuǎn)與光混頻效率的表達(dá)式。并進(jìn)行仿真分析,得到光斑尺寸偏差、光軸偏轉(zhuǎn)與光混頻效率變化曲線。當(dāng)混頻效率大于10%時,光斑尺寸偏差范圍為-42~250μm,光軸偏轉(zhuǎn)范圍為203μrad。通過計算光斑尺寸偏差和光軸偏轉(zhuǎn)綜合誤差發(fā)現(xiàn),調(diào)整光斑尺寸偏差可以改善光軸偏轉(zhuǎn)帶來的混頻效率惡化。進(jìn)一步搭建空間光混頻器影響因素實驗平臺,進(jìn)行了三種光斑尺寸偏差下光混頻效率隨光軸偏轉(zhuǎn)變化的實驗。實驗所測曲線與仿真結(jié)果趨勢一致,受實驗器件插入損耗的影響,實驗值略低于仿真值。所得影響規(guī)律為空間光混頻器設(shè)計、裝調(diào)和加工提供了一定參考。
[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.
【作者單位】： 長春理工大學(xué)光電工程學(xué)院;長春理工大學(xué)空間光電技術(shù)國家與地方聯(lián)合工程研究中心;
【基金】：國家自然科學(xué)基金(91438204) 吉林省教育廳基金(2015-77) 吉林省優(yōu)秀青年人才項目(20170520161JH)
【分類號】：TN929.1

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