本文選題：諧振式光學(xué)陀螺 + 調(diào)制解調(diào)�。� 參考：《中北大學(xué)》2015年碩士論文

【摘要】：諧振式光學(xué)陀螺具有壽命長(zhǎng)、可靠性高、參數(shù)穩(wěn)定性好等特點(diǎn)。工作原理決定了諧振式光學(xué)陀螺具有小型化潛質(zhì),用其構(gòu)建的慣性系統(tǒng)具有質(zhì)量輕、體積小、功耗低等優(yōu)勢(shì)。相關(guān)器件在微納衛(wèi)星慣性導(dǎo)航制導(dǎo)、姿態(tài)測(cè)量與姿態(tài)穩(wěn)定、以及油井測(cè)斜、大壩測(cè)斜、大地測(cè)量和振動(dòng)測(cè)量等相關(guān)領(lǐng)域具有廣泛的應(yīng)用價(jià)值,對(duì)諧振式光學(xué)陀螺的深入研究具有十分重要的科學(xué)意義。 諧振式光學(xué)陀螺是基于Sagnac效應(yīng),通過對(duì)經(jīng)過微腔順、逆時(shí)針傳輸?shù)墓馐M(jìn)行頻率差檢測(cè),從而實(shí)現(xiàn)對(duì)角速度的精確測(cè)量。由載體旋轉(zhuǎn)引起的諧振頻差極其微弱,而其動(dòng)態(tài)范圍諧振頻差都很大,光學(xué)腔對(duì)溫度、磁場(chǎng)等環(huán)境因素非常敏感；在大動(dòng)態(tài)范圍的諧振頻差下實(shí)現(xiàn)高精度的頻差檢測(cè)較困難。目前,常用的解決方法是采用閉環(huán)跟蹤鎖頻技術(shù)鎖定光纖環(huán)形諧振腔內(nèi)順逆時(shí)針傳輸?shù)墓饴分械囊宦沸盘?hào),利用相關(guān)檢測(cè)技術(shù)實(shí)現(xiàn)對(duì)另一路微弱信號(hào)的提取,因此,對(duì)光纖環(huán)形諧振腔頻率的鎖定技術(shù)的研究顯得尤為重要。 本文對(duì)傳統(tǒng)模擬鎖相放大器進(jìn)行了改進(jìn),采用雙相位鎖相放大器電路,對(duì)調(diào)制透射譜波進(jìn)行解調(diào)；數(shù)字鎖頻電路根據(jù)某一光路解調(diào)信號(hào)來實(shí)現(xiàn)頻率的跟蹤鎖定。對(duì)快速跟蹤鎖頻系統(tǒng)的性能進(jìn)行了測(cè)試,結(jié)果表明,系統(tǒng)工作穩(wěn)定,激光器頻率能被鎖定到設(shè)定光路的諧振頻率上,可以滿足R-FOG系統(tǒng)的測(cè)試需求。
[Abstract]:The resonant optical gyroscope has the advantages of long life, high reliability and good parameter stability. The working principle determines that the resonant optical gyroscope has the potential of miniaturization, and the inertial system constructed by it has the advantages of light weight, small volume and low power consumption. The related devices have been widely used in inertial navigation guidance, attitude determination and attitude stabilization, as well as oil well slant, dam slant, geodetic and vibration measurement and so on. The research of resonant optical gyroscope is of great scientific significance. The resonant optical gyroscope is based on the Sagnac effect. The accurate measurement of angular velocity is realized by detecting the frequency difference of the beam propagating counterclockwise through the microcavity. The resonant frequency difference caused by the carrier rotation is very weak, but the resonant frequency difference in the dynamic range is very large, the optical cavity is very sensitive to the environmental factors such as temperature, magnetic field, and it is difficult to realize the high precision frequency difference detection under the large dynamic range resonance frequency difference. At present, the common solution is to use the closed-loop tracking and frequency locking technique to lock one signal in the optical path in the optical circuit of the optical fiber ring resonator, and to extract the weak signal of the other path by using the correlation detection technology. It is very important to study the frequency locking technique of fiber ring resonator. In this paper, the traditional analog phase-locked amplifier is improved, and the modulation transmission spectrum is demodulated by using the dual-phase phase-locked amplifier circuit, and the digital frequency locking circuit realizes the frequency tracking and locking according to a certain optical demodulation signal. The performance of the fast tracking frequency locking system is tested. The results show that the system works stably and the laser frequency can be locked to the resonant frequency of the set optical path, which can meet the testing requirements of the R-FOG system.
【學(xué)位授予單位】：中北大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2015
【分類號(hào)】：TN253

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