本文關鍵詞：基于光電振蕩器的弱信號的頻率探測的研究　出處：《北京郵電大學》2015年碩士論文　論文類型：學位論文

  更多相關文章： 多模光電振蕩器 弱信號 偏置點 頻率切換

【摘要】：現代電子戰(zhàn)(EW)中,在復雜的環(huán)境中探測出弱信號的頻率具有重要作用�；陔姷奈⒉y量方法測量帶寬窄,不能滿足現代電子戰(zhàn)爭的需求。微波光子技術和傳統(tǒng)的電上的方法相比,具有大帶寬、低損耗以及抗電磁干擾等優(yōu)點。在噪聲環(huán)境中探測射頻信號頻率的方法主要有：利用色散、窄帶光濾波器,但是這些方法并沒有對低功率的射頻信號進行放大。 Preetpaul S. Devgan等提出了利用多模光電振蕩器(OEO)進行探測和放大低功率的射頻功率信號。多模光電振蕩器和單模光電振蕩器的區(qū)別主要是多模光電振蕩器反饋回路沒有電帶通濾波器。由于單模光電振蕩器回路中使用濾波器,其恢復的射頻信號頻率被限制在一定帶寬范圍內。另一方面,多模光電振蕩器可以注入鎖定任何和腔模振蕩頻率相匹配的注入信號頻率。光電振蕩器環(huán)路增益保持在臨界值以下,當引入外部注入信號,滿足振蕩條件的頻率會起振。這種多模光電振蕩器會對外部注入信號選擇性放大,即當注入信號頻率接近振蕩信號頻率時,注入信號會被放大；當注入信號頻率遠離振蕩信號頻率時,注入信號會有損耗。為了探測更多頻率的弱信號,該研究組還提出了基于雙激光器多模光電探測器的弱信號探測方法,該方法通過切換兩個激光器的開關切換兩套振蕩模式,然而這兩套模式的切換復雜且昂貴。 為了解決上述基于光電振蕩器探測弱信號的問題,我們提出了基于調節(jié)調制器偏置點的弱信號探測方法,也是本文的主要創(chuàng)新點。通過調節(jié)MZ調制器的偏置點實現兩套互補模式的切換,該頻率切換方法可以實現快速切換而且花費低。通過實驗驗證,基于調節(jié)調制器偏置點的弱信號頻率探測可以對注入的弱信號進行放大,探測精度高,靈敏度達到-78dBm,可探測信號的帶寬為4-9GHz。
[Abstract]:In modern electronic warfare (EW), in a complex environment to detect the weak signal frequency plays an important role. Microwave measurement method of electricity measurement based on narrow band, can not meet the demand of modern electronic war. Compared with the microwave photonic technology and method of traditional electricity, with large bandwidth, low loss and anti electromagnetic interference etc. a method for detecting the frequency of the radio frequency signal in the noise environment are: using the dispersion, narrowband optical filter, but none of these methods on low power RF signal amplification.
Preetpaul S. Devgan is proposed by using multimode optoelectronic oscillator (OEO) RF power signal detection and amplification of low power. The difference between multimode and single mode optical optoelectronic oscillator oscillator is mainly multimode optoelectronic oscillator feedback loop power band-pass filter. Due to the use of filter single-mode optical electric oscillator circuit, the recovery of the RF signal frequency is limited in a certain range of bandwidth. On the other hand, multimode optoelectronic oscillator can be any injection locked and cavity oscillation frequency to match the injected signal frequency. Optoelectronic oscillator loop gain remains below the critical value, when the introduction of external signal injection, meet the condition of oscillation frequency will be exciting. This kind of multimode optoelectronic oscillator for external signal injection selective amplification, namely when the injected signal frequency is close to the frequency when the injected signal will be amplified when the injected signal frequency is far; From the frequency, the injected signal will be loss. In order to detect more weak signal frequency, the research group also proposed a detection method for weak signal pair of multimode laser photoelectric detector based on this method, through the switch switch two two sets of laser oscillation mode, while switching the two sets of model is complicated and expensive.
In order to solve the optoelectronic oscillator weak signal detection based on the problems, we put forward the adjustment of the modulator bias point of weak signal detection method based on the main innovation of this paper. The realization of the two switch is set by adjusting the bias point complementary mode MZ modulator, frequency switching method can realize fast switching and low cost. Through the experiment, the adjustment of the modulator bias point frequency of weak signal detection can amplify the weak signal injection based on high detection precision and sensitivity can reach -78dBm, the detection signal bandwidth of 4-9GHz.

【學位授予單位】：北京郵電大學
【學位級別】：碩士
【學位授予年份】：2015
【分類號】：TN753.2;TN911.23

【共引文獻】

相關期刊論文 前2條

1 徐恩明;王棋;王飛;李培麗;;Instantaneous microwave frequency measurement based on hybrid microwave photonic filter[J];Optoelectronics Letters;2014年05期

2 鄒喜華;盧冰;;基于光子技術的微波頻率測量研究進展[J];數據采集與處理;2014年06期

相關碩士學位論文 前4條

1 李淼;基于比較函數的微波光子瞬時測頻技術[D];河南師范大學;2013年

2 王歡;基于相位調制或強度調制的瞬時微波光子頻率測量系統(tǒng)的研究[D];上海師范大學;2013年

3 王超逸;基于硅基微環(huán)的微波光子移相器[D];華中科技大學;2013年

4 張超;微波光子射頻譜分析和多頻本振生成[D];上海交通大學;2014年

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本文編號：1386915