24 November 2015 Performance analysis on quality of optical frequency comb generated by the recirculating frequency shifter based on linear IQ modulator
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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.
Lu Sun, Jianping Li, Jiachuan Lin, Lixia Xi, Xianfeng Tang, Xiaoguang Zhang, "Performance analysis on quality of optical frequency comb generated by the recirculating frequency shifter based on linear IQ modulator," Optical Engineering 54(11), 116106 (24 November 2015). https://doi.org/10.1117/1.OE.54.11.116106 . Submission:
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