Title :
Wavelength control for fibre-grating lasers enables low-cost DWDM operation down to 25 GHz channel spacing
Author :
Schmale, Ingo ; Smolorz, Sylvia ; Rönneberg, Enno ; Drögemüller, Karsten ; Hübner, Bernd
Author_Institution :
AIFOtec Fiberoptics AG, Munich, Germany
fDate :
6/24/1905 12:00:00 AM
Abstract :
We present a new, very cost-efficient control scheme to stabilise the mode and the emitted wavelength of fibre-grating lasers. It permits us to maintain the wavelength constant within ±5 pm while the output power may vary between -4 and +4 dBm. Such wavelength stability is a key requirement for dense wavelength-division multiplex (DWDM) systems, and we demonstrate its suitability down to 25 GHz channel spacings. The control scheme is based solely on the power at the laser´s back facet, which is monitored with a photodiode. Therefore, this control scheme drastically reduces the complexity and cost of DWDM laser sources.
Keywords :
diffraction gratings; fibre lasers; laser modes; laser stability; optical fibre communication; optical transmitters; optical variables control; photodiodes; semiconductor lasers; wavelength division multiplexing; DWDM; DWDM laser source complexity; DWDM laser source cost; DWDM operation; channel spacing; cost-efficient control scheme; dense wavelength-division multiplex systems; emitted wavelength stabilisation; fibre-grating lasers; laser back facet power; mode stabilisation; output power; photodiode monitoring; wavelength control; wavelength stability; Channel spacing; Fiber lasers; Laser modes; Laser stability; Monitoring; Optical control; Photodiodes; Power generation; Power lasers; Wavelength division multiplexing;
Conference_Titel :
Electronic Components and Technology Conference, 2002. Proceedings. 52nd
Print_ISBN :
0-7803-7430-4
DOI :
10.1109/ECTC.2002.1008068
