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Chinese Optics Letters

Chinese Optics Letters

| PUBLISHED MONTHLY BY CHINESE LASER PRESS AND DISTRIBUTED BY OSA

  • Editor: Zhizhan Xu
  • Vol. 10, Iss. 12 — Dec. 1, 2012
  • pp: 120401–120401

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

Shuang Liu, Zuping Qian, Rong Wang, Tao Pu, and Tao Fang  »View Author Affiliations


Chinese Optics Letters, Vol. 10, Issue 12, pp. 120401-120401 (2012)


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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 generated.

© 2012 Chinese Optics Letters

OCIS Codes
(040.2840) Detectors : Heterodyne
(350.4010) Other areas of optics : Microwaves
(060.3735) Fiber optics and optical communications : Fiber Bragg gratings

ToC Category:
Detectors

Citation
Shuang Liu, Zuping Qian, Rong Wang, Tao Pu, and Tao Fang, "Photonic generation of amplitude- and phase-modulated microwave signals with frequency and modulation bit-rate tunability," Chin. Opt. Lett. 10, 120401-120401 (2012)
http://www.opticsinfobase.org/col/abstract.cfm?URI=col-10-12-120401

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