Approach to Generate High-frequency Microwave Signal with Frequency Multiplication Factor Tunability by Using Cascaded Mach-Zehnder Modulators

被引:0
|
作者
Cong Wen-shan [1 ]
Yu Lan [1 ]
Wo Jiang-hai [1 ]
Wang Ya-lan [1 ]
Wang An-le [1 ]
机构
[1] Air Force Early Warning Acad, Wuhan 430019, Hubei, Peoples R China
关键词
Microwave photonics; Optoelectronics; High frequency microwave signal; Cascaded Mach-Zehnder modulators; Optical sidenband suppression ratio; Spurious suppression radio; PHOTONIC GENERATION; RADAR;
D O I
10.3788/gzxb20194803.0307002
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
From a theoretical analysis, the frequency multiplication factor of 2k microwave si g nal with a minimum optical sideband suppression ratio of 45.48 dB and a minimum spurious suppression radio of 39. 46 dB is generated by properly adjusting the direct current bias points and the modulation index of the cascaded Mach-Zehnder modulators without changing the optical filter. Moreover, the performance of sideband selection with the direct current bias point of Mach-Zehnder modulator, the amplitude and the initial phase difference of the modulation si g nal deviate from the ideal values is analyzed. Furthermore, the performance is evaluated by simulation experiment. The simulation results validate the feasibility and effectiveness of the proposed approach.
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页数:10
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