Generalized study of microwave frequency multiplication based on two cascaded MZMs

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• 作者：Xiaogang Chen^a ; ^{xgchen826@yahoo.com" class="auth_mail" title="E-mail the corresponding author} ; Lu Xia^a ; Dexiu Huang^b
• 关键词：Microwave photonics ; Mach&ndash ; Zehnder modulators ; Extinction ratio ; Modulation index optimization
• 刊名：Optik - International Journal for Light and Electron Optics
• 出版年：2016
• 出版时间：April 2016
• 年：2016
• 卷：127
• 期：8
• 页码：4061-4067
• 全文大小：2077 K

文摘

A comprehensive analysis of photonically assisted microwave frequency multiplication based on two cascaded Mach–Zehnder modulators (MZMs) is presented. The expressions, including all harmonics, are entirely general in terms of the extinction ratio (EXT) of MZM. A theoretical derivation that induces operating conditions is developed to achieve frequency quadrupling, sextupling, and octupling. The impact of an imperfect EXT of MZM on optical sideband suppression ratio and RF spurious suppression ratio is investigated. The improvement of system performance through MZM modulation index optimization is also analyzed. Simulation verifications are provided for the microwave frequency multiplication schemes.