Photonic generation of frequency-decupled microwave signal based on cascaded Mach-Zehnder modulators

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• 作者：Yichao Teng^a ; Yiwang Chen^a ; Baofu Zhang^b ; ^{zhangbaofu@163.com" class="auth_mail" title="E-mail the corresponding author} ; Pin Zhang^a ; Lin Lu^b ; Yong Zhu^b ; Jianhua Li^b ; Yan Li^c
• 关键词：Mach-Zehnder modulator ; Frequency-decupled ; Microwave generation ; Microwave photonic
• 刊名：Optik - International Journal for Light and Electron Optics
• 出版年：2016
• 出版时间：October 2016
• 年：2016
• 卷：127
• 期：20
• 页码：9275-9279
• 全文大小：1376 K

文摘

In order to effectively solve the generation problem of high frequency microwave signal, a frequency-decupled signal generation system based on two cascade Mach-Zehnder modulators (MZMs) is proposed. The RF drive signal is modulated by the first MZM, by adjusting the bias voltage, it is biased at the minimum transmission point (MITP). The generated signal is partly sent to the photoelectric detector (PD1) to heterodyne the first-order sidebands. With an optical coupler, the generated first-order sidebands are also used as the optical source for the second modulation. The generated frequency-doubled signal is modulated by the second MZM which is biased at the maximum transmission point (MATP), then the fifth-order sidebands signal are separated by a fiber Bragg grating from the generated sidebands. With the EDFA and PD2, the generation of a frequency-decupled microwave signal is realized. The structure is also verified by experiments, a frequency-decupled signal from 15 to 27 GHz is generated by the drive source signal which is tuned from 1.5 to 2.7 GHz.