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

Xiaodong Liang; Feifei Yin; Yitang Dai; Jianqiang Li; Kun Xu

doi:10.1117/1.OE.55.3.031103

25 September 2015 Elimination of cross-modulation distortion in a radio frequency–amplified intensity-modulation direct-detection analog photonic link

Xiaodong Liang, Feifei Yin, Yitang Dai, Jianqiang Li, Kun Xu

Author Affiliations +

Optical Engineering, Vol. 55, Issue 3, 031103 (September 2015). https://doi.org/10.1117/1.OE.55.3.031103

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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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," Optical Engineering 55(3), 031103 (25 September 2015). https://doi.org/10.1117/1.OE.55.3.031103

Published: 25 September 2015

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