Title :
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.
fDate :
4/15/2007 12:00:00 AM
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;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2007.894311
