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Optical Engineering

Digital linearization for broadband multicarrier analog photonic link incorporating downconversion
Author(s): Jieyu Ning; Yitang Dai; Feifei Yin; Jianqiang Li; Qiang Lv; Kun Xu
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Paper 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.

Paper Details

Date Published: 21 September 2015
PDF: 6 pages
Opt. Eng. 55(3) 031102 doi: 10.1117/1.OE.55.3.031102
Published in: Optical Engineering Volume 55, Issue 3
Show Author Affiliations
Jieyu Ning, Beijing Univ. of Posts and Telecommunications (China)
Yitang Dai, Beijing Univ. of Posts and Telecommunications (China)
Feifei Yin, Beijing Univ. of Posts and Telecommunications (China)
Jianqiang Li, Beijing Univ. of Posts and Telecommunications (China)
Qiang Lv, The 54th Research Institute of CETC (China)
Science and Technology on Information Transmission and Dissemination in Communication Networks Lab (China)
Kun Xu, Beijing Univ. of Posts and Telecommunications (China)

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