【摘要】：高性能的頻率源在通訊、雷達(dá)、測(cè)量等領(lǐng)域有著重要的作用,是系統(tǒng)中射頻信號(hào)的來源。傳統(tǒng)的頻率源存在著頻率低、頻譜純度差等問題。光電振蕩器(Optoelectronic Oscillator,OEO)作為一種新型的頻率源,可以產(chǎn)生高頻率且Q值極高、相位噪聲極低的高性能射頻信號(hào),并且可以產(chǎn)生抖動(dòng)低的光脈沖信號(hào),近年來受到了各國學(xué)者的關(guān)注。本論文對(duì)低相噪光電振蕩器的幾個(gè)關(guān)鍵技術(shù)進(jìn)行了理論分析和實(shí)驗(yàn)驗(yàn)證。本文首先介紹了光電振蕩器的運(yùn)轉(zhuǎn)機(jī)理,討論了低相噪光電振蕩器的三個(gè)關(guān)鍵技術(shù):單模運(yùn)轉(zhuǎn)、相位噪聲抑制和頻率穩(wěn)定性提升,闡述了這三種關(guān)鍵技術(shù)的常規(guī)解決方案和各自的基本原理,分析了它們的優(yōu)缺點(diǎn)。針對(duì)光電振蕩器各項(xiàng)指標(biāo)的提升,提出了兩種方案,第一種方案是基于鎖相環(huán)的雙環(huán)光電振蕩器,分析了雙環(huán)的結(jié)構(gòu)對(duì)邊模的抑制作用,通過鎖相環(huán)和溫控模塊提升了頻率穩(wěn)定性,理論推導(dǎo)了鎖相環(huán)光電振蕩器的噪聲傳遞函數(shù),并優(yōu)化了光電振蕩器的噪聲。第二種是改進(jìn)的注入鎖定式光電振蕩器,針對(duì)傳統(tǒng)的注入鎖定式光電振蕩器存在的失鎖問題,設(shè)計(jì)了額外的反饋環(huán)路,通過檢測(cè)注入鎖定式光電振蕩器和注入源的相位關(guān)系來控制環(huán)路長度,提高了光電振蕩器的長期穩(wěn)定性。另外,推導(dǎo)了注入鎖定式光電振蕩器s域的噪聲傳遞函數(shù),并利用這一關(guān)系優(yōu)化了注入鎖定式光電振蕩器的相位噪聲。最后,基于鎖相環(huán)和注入鎖定技術(shù),設(shè)計(jì)了光電振蕩器的工程化樣機(jī)。樣機(jī)可以長時(shí)間穩(wěn)定工作,輸出10GHz的高品質(zhì)信號(hào),邊模抑制比優(yōu)于75dB,在10kHz頻偏處相位噪聲低于-140dBc/Hz,且30小時(shí)內(nèi)頻率漂移低于0.05ppm。
[Abstract]:High performance frequency source plays an important role in communication, radar, measurement and so on. It is the source of radio frequency signal in the system. The traditional frequency source has some problems such as low frequency and poor spectral purity. As a new type of frequency source, photoelectric oscillator (Optoelectronic Oscillator,OEO) can produce high performance RF signal with high frequency, extremely high Q value and very low phase noise, and can also produce low jitter optical pulse signal. In recent years, scholars from all over the world have paid close attention to it. In this paper, several key techniques of low phase noise photoelectric oscillator are theoretically analyzed and verified by experiments. This paper first introduces the operation mechanism of photoelectric oscillator, and discusses three key technologies of low phase noise photoelectric oscillator: single mode operation, phase noise suppression and frequency stability improvement. The general solutions and basic principles of these three key technologies are described, and their advantages and disadvantages are analyzed. In view of the improvement of each index of photoelectric oscillator, two schemes are proposed. The first scheme is a dual-loop photoelectric oscillator based on phase-locked loop, and the suppression effect of dual-loop structure on edge mode is analyzed. The frequency stability is improved by phase-locked loop and temperature control module. The noise transfer function of phase-locked loop photoelectric oscillator is deduced theoretically and the noise of photoelectric oscillator is optimized. The second one is an improved injection-locked photoelectric oscillator. An additional feedback loop is designed to solve the lock-out problem of the traditional injection-locked photoelectric oscillator. The loop length is controlled by detecting the phase relationship between the injection-locked photoelectric oscillator and the injection source, and the long-term stability of the photoelectric oscillator is improved. In addition, the noise transfer function in the s-domain of the injection-locked photoelectric oscillator is derived, and the phase noise of the injection-locked photoelectric oscillator is optimized by using this relation. Finally, based on phase-locked loop and injection locking technology, an engineering prototype of photoelectric oscillator is designed. The prototype can work stably for a long time and output the high quality signal of 10GHz. The edge mode rejection ratio is better than 75 dB, the phase noise at the 10kHz frequency offset is lower than-140 dB / H z, and the frequency drift is less than 0.05 ppm within 30 hours.
【學(xué)位授予單位】：浙江大學(xué)
【學(xué)位級(jí)別】：碩士
【學(xué)位授予年份】：2017
【分類號(hào)】：TN752

【參考文獻(xiàn)】

相關(guān)期刊論文 前5條

1 龐長林,王曉浩,周兆英,庫國顯,呂靜姝;小型半導(dǎo)體制冷恒溫控制系統(tǒng)的實(shí)驗(yàn)研究[J];儀表技術(shù)與傳感器;2002年02期

2 胡遼林,劉增基;光纖通信的發(fā)展現(xiàn)狀和若干關(guān)鍵技術(shù)[J];電子科技;2004年02期

3 池金剛;金韜;池灝;徐偉;趙欣慰;鄧圓;;一種實(shí)用的光電振蕩器相位噪聲測(cè)量系統(tǒng)[J];光通信技術(shù);2013年04期

4 徐偉;金韜;池灝;;耦合式光電振蕩器的理論與實(shí)驗(yàn)研究[J];激光技術(shù);2014年05期

5 任鳳鑫;金韜;池灝;童國川;鄭俊超;;基于反饋控制環(huán)路提高光電振蕩器長期穩(wěn)定性的方法[J];光子學(xué)報(bào);2015年10期

相關(guān)碩士學(xué)位論文 前4條

1 任鳳鑫;光電振蕩器長期穩(wěn)定性研究[D];浙江大學(xué);2016年

2 徐偉;新型光電振蕩器研究[D];浙江大學(xué);2014年

3 池金剛;光電振蕩器技術(shù)及其相位噪聲測(cè)量研究[D];浙江大學(xué);2013年

4 孫斌;基于光電振蕩器的微波源研究[D];天津大學(xué);2012年

，

本文編號(hào)：2446835