Simple pre-distortion schemes for improving the power efficiency of SOA-based IR-UWB over fiber systems

OPTICS COMMUNICATIONS

卷:382

Article

Taki, H.^1,2  Azou, S.²  Hamie, A.^1,3  Al Housseini, A.¹  Alaeddine, A.¹  Sharaiha, A.² 

[1] Lebanese Univ, Fac Sci 1, LPE Res Ctr, Beirut, Lebanon

[2] ENIB, CNRS, UMR 6285, Lab STICC, Brest, France

[3] Arts Sci & Technol Univ Lebanon AUL, CRITC Res Ctr, Beirut, Lebanon

关键词: Ultrawideband (UWB) communications;    Impulse radio (IR);    Semiconductor optical amplifier (SOA);    Nonlinear effects;    Electrical pre-distortion;    Power efficiency;   

DOI  :  10.1016/j.optcom.2016.07.066

来源: Elsevier

【 摘 要 】

In this paper, we investigate the usage of SOA for reach extension of an impulse radio over fiber system. Operating in the saturated regime translates into strong nonlinearities and spectral distortions, which drops the power efficiency of the propagated pulses. After studying the SOA response versus operating conditions, we have enhanced the system performance by applying simple analog pre-distortion schemes for various derivatives of the Gaussian pulse and their combination. A novel pulse shape has also been designed by linearly combining three basic Gaussian pulses, offering a very good spectral efficiency (> 55%) for a high power (0 dBm) at the amplifier input. Furthermore, the potential of our technique has been examined considering a 1.5 Gbps-OOK and 0.75 Gbps-PPM modulation schemes. Pre-distortion proved an advantage for a large extension of optical link (150 km), with an inline amplification via SOA at 40 km. (C) 2016 Elsevier B.V. All rights reserved.

【 授权许可】

Free