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基于外调制器的光子毫米波生成技术具有频率调谐范围大、结构简单、稳定性强和信号频率纯度高等优点,被认为是实现高频宽带可调毫米波信号产生的有效解决方法。对基于一种双平行马赫-曾德尔调制器(DPMZM)的光子倍频毫米波生成技术进行系统的理论分析,给出了实现四倍频、六倍频、八倍频毫米波产生的参数条件,在此基础上提出了一种不需要利用电相移器和光滤波器的四倍频毫米波产生方案,讨论了DPMZM消光比和调制深度对光子倍频毫米波生成的影响。
The external modulator-based photon millimeter wave generation technology has the advantages of large frequency tuning range, simple structure, strong stability and high signal frequency purity, and is considered as an effective solution to realize high-frequency broadband adjustable millimeter-wave signal generation. The theoretical analysis of the photonic-frequency millimeter-wave generation technology based on a dual parallel Mach-Zehnder modulator (DPMZM) is given, and the parameter conditions for realizing the generation of the fourth, the sixth and the eightfold millimeter waves are given Based on this, a quadruple-frequency millimeter-wave generation scheme that does not require the use of an electrical phase shifter and an optical filter is proposed. The effects of DPMZM extinction ratio and modulation depth on the generation of photonic-frequency millimeter waves are discussed.