Cross-Channel Interference Due to Wavelength Drift of Tunable Lasers in DWDM Networks

Author

Connolly, E. ; Smyth, F. ; Mishra, A.K. ; Kaszubowska-Anandarajah, A. ; Barry, L.P.

Author_Institution

Res. Inst. for Networks & Commun. Eng., Dublin City Univ.

Volume

19

Issue

8

fYear

2007

fDate

4/15/2007 12:00:00 AM

Firstpage

616

Lastpage

618

Abstract

The authors present an investigation of the wavelength stability of a tunable laser (TL) transmitter and its impact on the performance of a 2.5-Gb/s dense wavelength-division-multiplexed (DWDM) system. Performance of a DWDM system, employing such a TL, is characterized by examining the cross-channel interference caused by this drift when the channel spacing is set to 12.5 and 25 GHz. Results obtained show that the wavelength drift affects the system performance by introducing an error floor in the case of 12.5-GHz spacing. This error floor can be mitigated by increasing the blanking time of the TL during the channel transition, in order to reduce the wavelength drift

Keywords

channel spacing; cochannel interference; laser stability; laser tuning; optical fibre communication; optical transmitters; wavelength division multiplexing; 12.5 GHz; 2.5 Gbit/s; 25 GHz; DWDM; channel spacing; cross-channel interference; dense wavelength-division-multiplexing; laser tuning; transmitters; wavelength drift; wavelength stability; Blanking; Channel spacing; Frequency measurement; Interference; Laser stability; Laser transitions; Optical transmitters; Tunable circuits and devices; Wavelength division multiplexing; Wavelength measurement; Sampled-grating distributed Bragg reflector; tunable lasers (TLs); ultradense wavelength-division multiplexing (UDWDM); wavelength drift measurement;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2007.894311

Filename

4139639