Lasers, Fiber Optics, and Communications

Performance analysis on quality of optical frequency comb generated by the recirculating frequency shifter based on linear IQ modulator

[+] Author Affiliations
Lu Sun, Jiachuan Lin, Lixia Xi, Xianfeng Tang, Xiaoguang Zhang

Beijing University of Posts and Telecommunications, State Key Laboratory of Information Photonics and Optical Communications, Xitucheng Road No. 10, Haidian District, Beijing 100876, China

Jianping Li

Jinan University, Institute of Photonics Technology, 601 Huangpu Road West, Guangzhou 510632, China

Opt. Eng. 54(11), 116106 (Nov 24, 2015). doi:10.1117/1.OE.54.11.116106
History: Received July 28, 2015; Accepted October 20, 2015
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Abstract.  An optical frequency comb generator using a modified single-sideband recirculating frequency shifter scheme adopting a linear IQ modulator as the kernel device (SSB-RFS-LIQM) is proposed. The optical comb lines generated by the proposed scheme possess good features such as extreme flatness and high optical signal-to-noise ratio (OSNR), compared to the quality we can obtain when we use a conventional IQ modulator in the SSB-RFS structure (called SSB-RFS-CIQM scheme). The mechanism of how the SSB-RFS-LIQM works is carefully analyzed with analytical and numerical methods. With the capability of strong suppression of high-order crosstalk and less demand of the gain of erbium-doped fiber amplifiers (and hence less amplified spontaneous noise induced) in the loop, 5.5 dB OSNR improvement can be achieved when 100 extreme flat comb lines are generated using the SSB-RFS-LIQM scheme compared to using the SSB-RFS-CIQM scheme.

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© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Lu Sun ; Jianping Li ; Jiachuan Lin ; Lixia Xi ; Xianfeng Tang, et al.
"Performance analysis on quality of optical frequency comb generated by the recirculating frequency shifter based on linear IQ modulator", Opt. Eng. 54(11), 116106 (Nov 24, 2015). ; http://dx.doi.org/10.1117/1.OE.54.11.116106


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