Tunable optoelectronic oscillator based on a dual-parallel Mach–Zehnder modulator and a phase-shifted FBG

Wei Wang; Cheng-Xin Li; Rui Dai; Lian-Qun Xie; Ke Wu; Ming-Chun Yin; Xu Chen; Bo Zhao

doi:10.1117/1.OE.55.12.126113

28 December 2016 Tunable optoelectronic oscillator based on a dual-parallel Mach–Zehnder modulator and a phase-shifted FBG

Wei Wang, Cheng-Xin Li, Rui Dai, Lian-Qun Xie, Ke Wu, Ming-Chun Yin, Xu Chen, Bo Zhao

Author Affiliations +

Optical Engineering, Vol. 55, Issue 12, 126113 (December 2016). https://doi.org/10.1117/1.OE.55.12.126113

Abstract

This paper proposes and demonstrates an optoelectronic oscillator (OEO) for the generation of a microwave signal with a wide frequency tuning range. In the proposed OEO, a microwave photonic filter (MPF) is formed by a joint operation of a dual-parallel Mach–Zehnder (DP-MZM) and a phase-shifted fiber Bragg grating (PS-FBG). The DP-MZM is employed to generate a modulated signal which includes an optical carrier and odd-order sidebands. The PS-FBG is used as an optical notch filter to remove the +1st sideband. Since the central frequency of the MPF can be shifted by changing the optical wavelength, the frequency tunability of the OEO is then realized by incorporating such an all-optical MPF into an optical domain dual-loop OEO without any electronic microwave filters. As a result, a microwave signal with a frequency-tuning range from 2.483 to 12.571 GHz is generated with its performance being evaluated.

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Wei Wang, Cheng-Xin Li, Rui Dai, Lian-Qun Xie, Ke Wu, Ming-Chun Yin, Xu Chen, and Bo Zhao "Tunable optoelectronic oscillator based on a dual-parallel Mach–Zehnder modulator and a phase-shifted FBG," Optical Engineering 55(12), 126113 (28 December 2016). https://doi.org/10.1117/1.OE.55.12.126113

Received: 18 September 2016; Accepted: 6 December 2016; Published: 28 December 2016

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KEYWORDS

Microwave radiation

Fiber Bragg gratings

Optoelectronics

Oscillators

Modulators

Signal generators

Modulation

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