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Researches on Microwave Photonic Signal Generation and Multiplication

Author: WangZheng
Tutor: YuJinLong
School: Tianjin University
Course: Communication and Information System
Keywords: Microwave photonic technology OEO Cavity-enhanced four-wave mixing Temporal fractional Talbot effect
CLC: TN015
Type: Master's thesis
Year: 2009
Downloads: 145
Quote: 1
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Abstract


In recent years, wireless communication technology and optical fiber communication technology has developed rapidly and has tremendous potential. Being the combination of the above advantages, microwave photonic technology is the current focus of research in the field of communications.This paper is mainly about the theoretical and experimental studies on the microwave photonic signal generation and frequency multiplication. Major works are as follows:1. Principle, structure, performance analysis of Optoelectronic oscillatorFirst, given the basic structure of the OEO, analyzes its principle, then the OEO system established through the mathematical models are analyzed and the OEO performance indicators are discussed, finally given some measures to optimize the performance of the OEO.2. Experimental study of the dual-loop opto-electronic oscillatorAnalyzed the mechanism of the dual-loop opto-electronic oscillator, introduced three reported experiment schemes, then proposed two new schemes of the dual-loop opto-electronic oscillator:one is based on the PBS and PBC, the other is based on the dual laser sources. At last, summerized the experimental results,and compared the advantages and disadvantages of each scheme.3. Principle demonstration and experimental study of the microwave signal generator based on cavity-enhanced four-wave mixingIntroduced the principle of F-P laser diode, discussed the four-wave mixing effect in the gain medium, showed some features of this effect. then proposed the experimental scheme of microwave signal generator based cavity-enhanced four-wave mixing, and completed the preparation work.4. Detailed explanation of the pulse repetation rate multiplication based on temporal fractional Talbot effectExplained the temporal Talbot effect on the frequency domain, then maked a comparation of the spatial and temporal Talbot effect, discussed the basic distance unit of Talbot effect. At last, used the method of temporal waveform superposition to introduce the temporal temporal fractional Talbot effect.5. Experimental study of the pulse repetation rate multiplication based on temporal fractional Talbot effectBy the principle of relationship between pulse sideband phase deviation and group velocity dispersion, got the length requirement of the optical fiber, Then proved the principle of temporal fractional Talbot effect by experiment. By summerizing the results of the experiment, analyzed the spectral width, dispersion accuracy and other parameters’influence on the quality of pulse repetation, pointed out the relations between the parameters, proved the dispersion deviation tolerance formula, proposed the scheme of system optimization.

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CLC: > Industrial Technology > Radio electronics, telecommunications technology > General issues > Basic theory > Microwave and UHF
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