本文選題：諧振式光纖陀螺 + 溫度效應(yīng)　； 參考：《中北大學(xué)》2017年碩士論文

【摘要】：諧振式光纖陀螺是一種用于敏感角速度的慣性元器件,在小型化、集成化、抗過(guò)載、高精度等方面優(yōu)勢(shì)顯著,近年來(lái)引起了研究人員的廣泛關(guān)注。不同于干涉式光纖陀螺,諧振式光纖陀螺利用光波的多次循環(huán)傳輸提高系統(tǒng)精度及靈敏度,而不以犧牲光纖環(huán)形諧振腔腔長(zhǎng)為代價(jià),加強(qiáng)光學(xué)Sagnac效應(yīng)的同時(shí),為系統(tǒng)帶來(lái)光纖環(huán)溫度分布不均勻引起的Shupe效應(yīng)。然而,諧振式光纖陀螺的核心敏感元件—保偏光纖環(huán)形諧振腔具有極高的溫度靈敏度,雙折射率差溫度系數(shù)為2.39 107/-?℃,對(duì)于腔長(zhǎng)1.8m的光纖環(huán),外界溫度每變化1℃,R-FOG內(nèi)部?jī)蒃SOPS諧振谷的相對(duì)波動(dòng)量約FSR/4,這對(duì)于R-FOG諧振頻率的準(zhǔn)確檢測(cè)是十分有害的。本文首先介紹了光學(xué)Sagnac效應(yīng),建立了光纖環(huán)形諧振腔的光波場(chǎng)傳遞函數(shù),分析了光纖損耗變化引起的FWHM波動(dòng)對(duì)FRR性能參數(shù)的影響;介紹了諧振式光纖陀螺角速度檢測(cè)原理;描述了表征諧振式光纖陀螺性能的幾個(gè)重要指標(biāo);詳細(xì)分析了R-FOG中的背散射及偏振波動(dòng)噪聲,以及相應(yīng)的噪聲抑制技術(shù)。然后,利用光波場(chǎng)瓊斯傳輸矩陣構(gòu)建了保偏光纖環(huán)形諧振腔的溫度波動(dòng)效應(yīng)模型;從理論上仿真FRR溫度變化引起的P-ESOP諧振谷左右不對(duì)稱的現(xiàn)象;深入探究了諧振曲線不對(duì)稱性對(duì)光纖環(huán)形諧振腔性能參數(shù)FWHM、F、Q以及ρ的影響;詳細(xì)分析了FRR入腔光波的溫度特性及其對(duì)R-FOG偏置誤差的影響;論述了諧振曲線不對(duì)稱性對(duì)R-FOG標(biāo)度因數(shù)及標(biāo)度因數(shù)非線性度的影響;最后分析了FRR溫度波動(dòng)引起R-FOG角速度偏移的機(jī)理,并對(duì)R-FOG輸出進(jìn)行了理論仿真。文章最后介紹了開(kāi)環(huán)諧振式光纖陀螺的系統(tǒng)結(jié)構(gòu)及器件參數(shù);設(shè)計(jì)并搭建了基于FRR主動(dòng)溫度控制的開(kāi)環(huán)R-FOG系統(tǒng);針對(duì)不同F(xiàn)RR溫度下,環(huán)腔輸出譜線、R-FOG標(biāo)度因數(shù)及標(biāo)度因數(shù)非線性度、R-FOG零偏誤差及零偏誤差漂移的相關(guān)特性進(jìn)行了實(shí)驗(yàn)測(cè)試;分析了FRR溫度波動(dòng)引起的P-ESOP諧振谷不對(duì)稱度RAR與R-FOG標(biāo)度因數(shù)及其非線性度以及系統(tǒng)零偏誤差漂移之間的關(guān)系。結(jié)果表明:FRR溫度為27℃時(shí),P-ESOP諧振曲線不對(duì)稱度RAR為0.0075,對(duì)應(yīng)的標(biāo)度因數(shù)為5.43mV/(°/s),標(biāo)度因數(shù)非線性度為0.34%,R-FOG零偏誤差漂移為0.07°/s;當(dāng)FRR溫度為25.50℃時(shí),P-ESOP諧振曲線不對(duì)稱度RAR為0.2174,對(duì)應(yīng)的標(biāo)度因數(shù)為0.39mV/(°/s),標(biāo)度因數(shù)非線性度為0.948%,R-FOG零偏誤差漂移6.69°/s,該值等于FRR溫度為27℃時(shí)的100倍�？芍�,FRR內(nèi)P-ESOP不對(duì)稱度RAR增大時(shí),R-FOG標(biāo)度因數(shù)減小,系統(tǒng)非線性度惡化,R-FOG零偏誤差漂移增加,系統(tǒng)檢測(cè)精度和靈敏度下降。
[Abstract]:Resonant fiber optic gyroscope (Rfog) is a kind of inertial component used for sensitive angular velocity. It has many advantages in miniaturization, integration, overload resistance, high precision and so on, and has attracted wide attention of researchers in recent years. Unlike interferometric fiber optic gyroscopes, resonator fiber optic gyroscopes (Rfog) improve the accuracy and sensitivity of the system by multiple circulatory transmission of optical waves, without sacrificing the length of fiber ring resonator to enhance the optical Sagnac effect. The Shupe effect caused by the uneven temperature distribution of the optical fiber ring is brought to the system. However, the core sensing element of the resonator fiber optic gyroscope, the polarization-maintaining fiber ring resonator, has extremely high temperature sensitivity. The temperature coefficient of the birefringence difference is 2.39,107 / -? 鈩，

本文編號(hào)：1943996