Behavioral modeling and digital compensation of nonlinearity in DFB lasers for multi-band directly modulated radio-over-fiber systems

Jianqiang Li; Chunjing Yin; Hao Chen; Feifei Yin; Yitang Dai; Kun Xu

doi:10.1117/12.2069888

3 December 2014 Behavioral modeling and digital compensation of nonlinearity in DFB lasers for multi-band directly modulated radio-over-fiber systems

Jianqiang Li, Chunjing Yin, Hao Chen, Feifei Yin, Yitang Dai, Kun Xu

Author Affiliations +

Proceedings Volume 9267, Semiconductor Lasers and Applications VI; 92670K (2014) https://doi.org/10.1117/12.2069888
Event: SPIE/COS Photonics Asia, 2014, Beijing, China

Abstract

The envisioned C-RAN concept in wireless communication sector replies on distributed antenna systems (DAS) which consist of a central unit (CU), multiple remote antenna units (RAUs) and the fronthaul links between them. As the legacy and emerging wireless communication standards will coexist for a long time, the fronthaul links are preferred to carry multi-band multi-standard wireless signals. Directly-modulated radio-over-fiber (ROF) links can serve as a lowcost option to make fronthaul connections conveying multi-band wireless signals. However, directly-modulated radioover- fiber (ROF) systems often suffer from inherent nonlinearities from directly-modulated lasers. Unlike ROF systems working at the single-band mode, the modulation nonlinearities in multi-band ROF systems can result in both in-band and cross-band nonlinear distortions. In order to address this issue, we have recently investigated the multi-band nonlinear behavior of directly-modulated DFB lasers based on multi-dimensional memory polynomial model. Based on this model, an efficient multi-dimensional baseband digital predistortion technique was developed and experimentally demonstrated for linearization of multi-band directly-modulated ROF systems.

Citation Download Citation

Jianqiang Li, Chunjing Yin, Hao Chen, Feifei Yin, Yitang Dai, and Kun Xu "Behavioral modeling and digital compensation of nonlinearity in DFB lasers for multi-band directly modulated radio-over-fiber systems", Proc. SPIE 9267, Semiconductor Lasers and Applications VI, 92670K (3 December 2014); https://doi.org/10.1117/12.2069888

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