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Optical Engineering

Elimination of cross-modulation distortion in a radio frequency–amplified intensity-modulation direct-detection analog photonic link
Author(s): Xiaodong Liang; Feifei Yin; Yitang Dai; Jianqiang Li; Kun Xu
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Paper Abstract

By cascading two standard Mach–Zehnder modulators (MZMs), we propose and demonstrate a scheme to effectively eliminate the cross-modulation distortion (XMD), which results from the out-of-band interference in multicarrier intensity-modulation direct-detection (IMDD) analog photonic links. When the bias angle of the cascaded modulator is specifically designed, the XMDs, both from the photonic link itself and from the nonlinear electrical amplifiers, are well suppressed. Our proposal is theoretically analyzed, and the performance of the cascading system is experimentally demonstrated. A suppression ratio of more than 30 dB is achieved by the cascading scheme. By using the high-performance pre- and postamplifiers, the measured link gain and noise figure are improved by 62 and 32 dB, respectively.

Paper Details

Date Published: 25 September 2015
PDF: 6 pages
Opt. Eng. 55(3) 031103 doi: 10.1117/1.OE.55.3.031103
Published in: Optical Engineering Volume 55, Issue 3
Show Author Affiliations
Xiaodong Liang, Beijing Univ. of Posts and Telecommunications (China)
Feifei Yin, Beijing Univ. of Posts and Telecommunications (China)
Yitang Dai, Beijing Univ. of Posts and Telecommunications (China)
Jianqiang Li, Beijing Univ. of Posts and Telecommunications (China)
Kun Xu, Beijing Univ. of Posts and Telecommunications (China)

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