本文選題：微波光電子　切入點(diǎn)：鈮酸鋰波導(dǎo)　出處：《電子科技大學(xué)》2014年碩士論文　論文類型：學(xué)位論文

【摘要】：隨著無線通信以及雷達(dá)技術(shù)的不斷發(fā)展發(fā)展,現(xiàn)代電子戰(zhàn)和雷達(dá)戰(zhàn)中,截斷和分析敵方通信系統(tǒng)的微波信號已經(jīng)被放到了一個非常重要的高度。來自敵方的微波信號可能存在于非常寬的頻帶上,但現(xiàn)階段典型的微波接收機(jī)僅僅能工作在非常窄的頻帶內(nèi)�；谶@種矛盾,一個能夠?qū)崟r而準(zhǔn)確測量微波信號載波頻率的器件就顯得十分重要了。實(shí)現(xiàn)這種功能的系統(tǒng)被稱之為實(shí)時頻率測量(IFM)系統(tǒng)。利用新興的微波光電子技術(shù),通過引入光子學(xué)方法來實(shí)現(xiàn)微波系統(tǒng)中較難實(shí)現(xiàn)的信號處理功能,可以實(shí)現(xiàn)重量輕,尺寸小,損耗低,頻帶寬,電磁干擾免疫的微波頻率測量。該方法己得到了國內(nèi)外專家學(xué)者的廣泛關(guān)注,成為了當(dāng)前的研究熱點(diǎn)�，F(xiàn)階段的光學(xué)微波頻率測量還存在集成度不高、結(jié)構(gòu)復(fù)雜、測量效果欠佳等缺點(diǎn),未能實(shí)用化。本論文正是針對上述問題,提出了一種基于非對稱MZI的微波頻率實(shí)時測量技術(shù)。該技術(shù)可完成從電光調(diào)制到信號處理的一體集成,結(jié)構(gòu)簡單,理論測量精度達(dá)到0.1 GHz,微波頻率測量頻帶覆蓋1~20 GHz,提高了現(xiàn)有光學(xué)微波頻率測量技術(shù)的性能,進(jìn)一步接近實(shí)用化。首先,論文介紹了基于非對稱MZI的微波實(shí)時測量技術(shù)中涉及的基本理論,進(jìn)而分析了該測量技術(shù)的工作原理,并對光學(xué)傳輸特性進(jìn)行了推導(dǎo),驗(yàn)證了設(shè)計的可行性,同時對該測量技術(shù)的描述參數(shù)進(jìn)行了簡單說明。其次,論文對基于非對稱MZI的微波實(shí)時測量技術(shù)中涉及的關(guān)鍵器件,特別是可實(shí)現(xiàn)一體加工的Li Nb O3波導(dǎo)部分,進(jìn)行了討論設(shè)計,給出了滿足微波頻率測量的要求的參數(shù)量值。這些關(guān)鍵器件決定了基于非對稱MZI的微波實(shí)時測量技術(shù)的固有特性:波導(dǎo)單模工作;非對稱區(qū)彎曲損耗小于1 d B;微波輸入頻率1~30 GHz;自由光譜范圍35 GHz。然后,論文分析討論了光波導(dǎo)器件外的其他性能參數(shù)對微波頻率測量的影響,包括光源特性、探測系統(tǒng)性能、接收系統(tǒng)性能三方面,給出了他們對微波頻率測量的影響,得到了合理的參考量值。從而完成了整個基于非對稱MZI的微波實(shí)時測量系統(tǒng)的設(shè)計,得出所設(shè)計系統(tǒng)的性能參數(shù)。最后,設(shè)計實(shí)驗(yàn)證明了該設(shè)計的可行性。得到了不同工作點(diǎn)下待測微波頻率與輸出光功率的關(guān)系。
[Abstract]:With the development of wireless communication and radar technology, modern electronic warfare and radar warfare, Truncation and analysis of microwave signals in enemy communication systems have been placed at a very important height. Microwave signals from the enemy may exist in a very wide frequency band. But the typical microwave receiver at this stage can only work in a very narrow band. A device that can measure the carrier frequency of microwave signals in real time and accurately is very important. By introducing photonics to realize the signal processing function which is difficult to realize in microwave system, it can realize light weight, small size, low loss, low frequency bandwidth. The microwave frequency measurement of electromagnetic interference immunity (EMI), which has been paid more and more attention by experts and scholars at home and abroad, has become a hot research topic at present. At present, the optical microwave frequency measurement still has low integration and complex structure. This paper presents a microwave frequency real-time measurement technology based on asymmetric MZI, which can integrate from electro-optic modulation to signal processing. The structure is simple, the precision of theoretical measurement is 0.1 GHz, and the frequency band of microwave frequency measurement is 1 ~ 20 GHz, which improves the performance of the existing optical microwave frequency measurement technology and is closer to practical use. This paper introduces the basic theory of microwave real-time measurement technology based on asymmetric MZI, and then analyzes the working principle of the measurement technology, and deduces the optical transmission characteristics, and verifies the feasibility of the design. At the same time, the description parameters of the measurement technology are simply explained. Secondly, the key devices involved in the microwave real-time measurement technology based on asymmetric MZI, especially the Linbo 3 waveguide, which can be fabricated in an integrated way, are discussed in this paper. This paper discusses the design and gives the parameter values to meet the requirements of microwave frequency measurement. These key devices determine the inherent characteristics of microwave real-time measurement technology based on asymmetric MZI: waveguide single-mode operation; The bending loss in asymmetric region is less than 1 dB; the microwave input frequency is 1 ~ 30 GHz; the free spectrum range is 35 GHz. Then, the influence of other performance parameters outside the optical waveguide device on the microwave frequency measurement is analyzed and discussed, including the characteristics of the light source and the performance of the detection system. Three aspects of the performance of the receiving system are given, and their influence on the microwave frequency measurement is given, and the reasonable reference value is obtained. Thus, the design of the microwave real-time measurement system based on asymmetric MZI is completed. The performance parameters of the designed system are obtained. Finally, the feasibility of the design is proved by the design experiment, and the relationship between the microwave frequency to be measured and the output optical power at different operating points is obtained.
【學(xué)位授予單位】：電子科技大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2014
【分類號】：TM935

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本文編號：1631627