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Photonic generation of amplitude- and phase-modulated microwave signals with frequency and modulation bit-rate tunability

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Abstract

A photonic approach for the generation of an amplitude- and phase-modulated microwave signal with tunable frequency and modulation bit-rate is proposed and demonstrated. Two coherent optical wavelengths are generated based on external modulation by biasing a Mach–Zehnder modulator (MZM) at the minimum transmission point to generate ±1-order optical sidebands while suppressing the optical carrier. The two sidebands are sent to a circulator and are then spectrally separated by a fiber Bragg grating notch filter. With one sideband being amplitude-modulated at another MZM and the other being phase-modulated at a phase modulator, a frequency-tunable amplitude- and phase-modulated microwave signal is generated by beating the two sidebands at a photodetector. The proposed technique is investigated theoretically and experimentally. As a result, a 20-GHz amplitude-modulated, 20-GHz phase-modulated, and 25-GHz amplitude- and phase-modulated microwave signals with tunable modulation bit-rate are experimentally generatedOCIS codes: 040.2840, 350.4010, 060.3735.

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DOI:10.3788/col201210.120401

所属栏目:Detectors

责任编辑:刘盛龄

收稿日期:2012-05-28

录用日期:2012-08-07

网络出版日期:2012-11-30

联系人作者:联系作者(youyou1985@xnmsn.cn)

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引用该论文

Shuang Liu, Zuping Qian, Rong Wang, Tao Pu, Tao Fang, "Photonic generation of amplitude- and phase-modulated microwave signals with frequency and modulation bit-rate tunability," Chinese Optics Letters 10(12), 120401 (2012)

被引情况

【1】. Stable multi-frequency generator based on phase-locked optical frequency combs. Chinese Optics Letters, 2014, 12(2): 20602-20605

【2】Yukun Zhu,Minghui Yang,Liang Wu,Yun Sun,and Xiaowei Sun. Practical millimeter-wave holographic imaging system with good robustness. Chinese Optics Letters, 2016, 14(10): 101101-101105

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