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

Digital linearization for broadband multicarrier analog photonic link incorporating downconversion

[+] Author Affiliations
Jieyu Ning, Yitang Dai, Feifei Yin, Jianqiang Li

Beijing University of Posts and Telecommunications, State Key Laboratory of Information Photonics and Optical Communications, Beijing 100876, China

Qiang Lv

The 54th Research Institute of CETC, Shijiazhuang, Hebei 050081, China

Science and Technology on Information Transmission and Dissemination in Communication Networks Laboratory, Shijiazhuang, Hebei 050081, China

Kun Xu

Beijing University of Posts and Telecommunications, State Key Laboratory of Information Photonics and Optical Communications, Beijing 100876, China

Beijing University of Posts and Telecommunications, School of Science, Beijing 100876, China

Opt. Eng. 55(3), 031102 (Sep 21, 2015). doi:10.1117/1.OE.55.3.031102
History: Received July 22, 2015; Accepted August 20, 2015
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Abstract.  The multicarrier analog photonic links suffer from both the traditional third-order intermodulation distortions (IMD3) and the cross-modulation distortions (XMDs), severely limiting the dynamic range of the links. This paper proposes and demonstrates an effective technique based on a single modulator and photodetector to simultaneously realize the downconversion and receiving of multiple radio frequency signals, as well as suppress the nonlinearities, including the IMD3 and XMD. In the scheme, the nonlinear compensation information is directly obtained from hardware then the distortion compensation is carried out in the digital domain. Experimental results show that the XMD and IMD3 distortions are suppressed with 36.6 and 25.8 dB, respectively, and the link dynamic range is improved by 25 dB, preventing the degradation of the dynamic range of the link. Moreover, the structure of our scheme can eliminate the stringent requirement for hardware.

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© 2015 Society of Photo-Optical Instrumentation Engineers

Citation

Jieyu Ning ; Yitang Dai ; Feifei Yin ; Jianqiang Li ; Qiang Lv, et al.
"Digital linearization for broadband multicarrier analog photonic link incorporating downconversion", Opt. Eng. 55(3), 031102 (Sep 21, 2015). ; http://dx.doi.org/10.1117/1.OE.55.3.031102


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