Title :
Cross Channel Interference due to Wavelength Drift of Tuneable Lasers in DWDM Networks
Author :
Connolly, E. ; Kaszubowska-Anandarajah, A. ; Barry, L.P.
Author_Institution :
Sch. of Electron. Eng., Dublin City Univ.
Abstract :
The authors present an investigation of wavelength stability of a tunable laser transmitter and its impact on the performance of a 2.5 Gb/s dense wavelength division multiplexed system. The wavelength drift of the laser after switching between channels is accurately measured by using a self-heterodyning technique and an optical filtering technique. Performance of a DWDM system, employing such a tunable laser, is characterised by examining the inter-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 a power penalty in the case of 25 GHz spacing and an error floor in the case of 12.5 GHz spacing
Keywords :
heterodyne detection; laser stability; laser tuning; optical fibre networks; optical filters; optical switches; optical transmitters; telecommunication channels; wavelength division multiplexing; 12.5 GHz; 2.5 Gbit/s; 25 GHz; DWDM networks; channel spacing; channel switching; cross channel interference; dense wavelength division multiplexed system; error floor; interchannel interference; laser transmitter; optical filtering; power penalty; self-heterodyning technique; tunable lasers; wavelength drift; wavelength stability; Channel spacing; Filtering; Interchannel interference; Laser stability; Laser tuning; Optical filters; Optical transmitters; Tunable circuits and devices; Wavelength division multiplexing; Wavelength measurement; SGDBR; dense wavelength division multiplexing; tunable lasers; wavelength measurement;
Conference_Titel :
Transparent Optical Networks, 2006 International Conference on
Conference_Location :
Nottingham
Print_ISBN :
1-4244-0235-2
Electronic_ISBN :
1-4244-0236-0
DOI :
10.1109/ICTON.2006.248494
