7 February 2017 Dual-loop optoelectronic oscillator based on a compact balanced detection scheme
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Abstract
A compact dual-loop optoelectronic oscillator (OEO) employing a dual-output Mach–Zehnder intensity modulator (DOMZM) and a balanced photodetector (BPD) is theoretically analyzed and experimentally demonstrated. The fundamental idea of the scheme is based on double loops formed by two complementary output ports of DOMZM and two input ports of BPD, which could be naturally combined without any additional optical coupler or polarization beam splitter devices. This simple structure makes it possible to enhance side-mode suppression ratio (SMSR) and reduce phase noise of the OEO. Compared with the traditional dual-loop OEO (SO-OEO) based on single-output Mach–Zehnder modulator (MZM), optical coupler, and BPD, the advantages of our proposed dual-loop OEO (DO-OEO) with DOMZM and BPD are presented. Experimental results show that a 16-GHz single-mode OEO is obtained with measured SMSR of 72 dB and phase noise of 133.2    dBc / Hz at 10-kHz frequency offset.
© 2017 Society of Photo-Optical Instrumentation Engineers (SPIE)
Feng Fan, Feng Fan, Jingjing Hu, Jingjing Hu, Wenwu Zhu, Wenwu Zhu, Yiying Gu, Yiying Gu, Xiuyou Han, Xiuyou Han, Mingshan Zhao, Mingshan Zhao, } "Dual-loop optoelectronic oscillator based on a compact balanced detection scheme," Optical Engineering 56(2), 026107 (7 February 2017). https://doi.org/10.1117/1.OE.56.2.026107 . Submission: Received: 20 October 2016; Accepted: 17 January 2017
Received: 20 October 2016; Accepted: 17 January 2017; Published: 7 February 2017
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