MIMO DWDM System Using Uncooled DFB Lasers With Adaptive Laser Bias Control and Postphotodetection Crosstalk Cancellation

Author

Jiannan Zhu ; Ingham, J.D. ; von Lindeiner, J.B. ; Wonfor, Adrian ; Penty, Richard V. ; White, Ian H.

Author_Institution

Dept. of Eng., Univ. of Cambridge, Cambridge, UK

Volume

32

Issue

21

fYear

2014

fDate

Nov.1, 1 2014

Firstpage

3974

Lastpage

3981

Abstract

A proof-of-principle demonstration of a multiple input-multiple output (MIMO) dense wavelength division multiplexing (DWDM) system is reported. It uses standard uncooled distributed feedback lasers with intensity modulation-direction detection (IM-DD), in which the temperature of each laser is allowed to drift independently within a 50 °C temperature range. A feedback-based laser bias control algorithm is introduced to guarantee acceptable wavelength spacing and a postphotodetection minimum mean square error decoder is applied to cancel the interchannel crosstalk. The relative sensitivity of the MIMO receiver in both a random laser temperature drift scenario and a worst-case scenario are investigated by simulations in MATLAB. Experimental results for a 40-channel × 12.5 Gb/s DWDM system transmitting over 28 km of single-mode fiber with worst possible wavelength distribution prove the feasibility of the technique.

Keywords

MIMO communication; adaptive control; adjacent channel interference; crosstalk; decoding; distributed feedback lasers; intensity modulation; interference suppression; mean square error methods; photodetectors; radio receivers; wavelength division multiplexing; IM-DD; MATLAB simulation; MIMO DWDM system; MIMO receiver; acceptable wavelength spacing; adaptive laser bias control; dense wavelength division multiplexing system; distributed feedback laser; feedback- based laser bias control algorithm; intensity modulation-direction detection; interchannel crosstalk cancellation; multiple input-multiple output system; postphotodetection crosstalk cancellation; postphotodetection minimum mean square error decoder; random laser temperature drift scenario; single-mode fiber; temperature 50 degC; uncooled DFB laser; Crosstalk; Decoding; Laser tuning; MIMO; Receivers; Wavelength division multiplexing; Energy consumption; multiple input multiple output; wavelength division multiplexing;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2014.2334474

Filename

6847154