Research On Weak Microwave Signal Receiving Based On Micro-ring Resonator

Receiving of weak microwave signal has been attached many attentions in microwave photonics research.The most important work in this subject is how to improve the modulation efficiency of electro-optic upconverters.The traditional electro-optic modulator like Mach–Zehnder has high power consumption(1m W～ 1W)that cannot be applied to weak microwave signals receiving.And to this problem,a novel method is proposed in this paper.We enhance the electro-optic upconverters efficiency by using high Q Li Nb O 3 micro-ring resonator to improve the nonlinear effects of electric signal and optical carrier.Based on this method,we finally achieved 5Mb/s weak microwave signal receiving in simulation,which the minimum detectable power is-82.966 d Bm(0.005 n W).In this dissertation,we first review some research progresses of both the microring resonator and weak microwave signal receiving,and demonstrate our analysis;Then we discuss the theory used in this dissertation,which includes the theory of micro-ring resonator and microstrip line;Base on the theory,we provide the work principle of this weak microwave signal receiving system by analyzing the function of micro-ring resonator and microstrip line;After that,we discuss about the performance of this system through three angle: the properties of micro-ring resonator,the properties of microstrip electrode and phase match;finally,we set the appropriate parameters according to the above analysis results,and do the simulative calculation of this weak microwave signal receiving system.