Special Section on Microwave Photonics: Deep Interactions between Microwaves and Lightwaves

Elimination of cross-modulation distortion in a radio frequency–amplified intensity-modulation direct-detection analog photonic link

[+] Author Affiliations
Xiaodong Liang, Feifei Yin, Yitang Dai, Jianqiang Li

Beijing University of Posts and Telecommunications, State Key Laboratory of Information Photonics and Optical Communications, P.O. Box 72, No.10 Xi Tu Cheng Road, Hai Dian District, Beijing 100876, China

Kun Xu

Beijing University of Posts and Telecommunications, State Key Laboratory of Information Photonics and Optical Communications, P.O. Box 72, No.10 Xi Tu Cheng Road, Hai Dian District, Beijing 100876, China

Beijing University of Posts and Telecommunications, School of Science, P.O. Box 72, No.10 Xi Tu Cheng Road, Hai Dian District, Beijing 100876, China

Opt. Eng. 55(3), 031103 (Sep 25, 2015). doi:10.1117/1.OE.55.3.031103
History: Received July 10, 2015; Accepted August 25, 2015
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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.

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© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Xiaodong Liang ; Feifei Yin ; Yitang Dai ; Jianqiang Li and Kun Xu
"Elimination of cross-modulation distortion in a radio frequency–amplified intensity-modulation direct-detection analog photonic link", Opt. Eng. 55(3), 031103 (Sep 25, 2015). ; http://dx.doi.org/10.1117/1.OE.55.3.031103


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