Title :
Effect of random facet phases in distributed feedback lasers on optical fibre link transmission penalty
Author :
Thilakumara, R.P. ; Wonfor, A. ; Williams, K.A. ; Penty, R.V. ; White, I.H. ; Wijnands, F.H.G.M.
Author_Institution :
Centre for Commun. Res., Bristol Univ., UK
Abstract :
Summary form only given. The random phase differences between facet reflectors and those due to the Bragg grating in uniform grating DFB lasers cause significant variations in the spectral characteristics from device to device. This results in a spread in the transmission performance for long haul fibre links. It is uneconomical to fail packaged components, therefore it is necessary to do comprehensive system modelling. In this paper, this spread in system penalty for varying coupling strength (/spl kappa/L) is modelled using a travelling wave laser model, and a single mode fibre model. Good agreement is found with experiment for InGaAsP, MQW, ridge waveguide, HR/AR(75%-3%) coated DFB lasers operating at 1.55 /spl mu/m.
Keywords :
Bragg gratings; distributed feedback lasers; laser theory; optical fibre communication; optical fibre theory; optical transmitters; quantum well lasers; 1.55 mum; Bragg grating; InGaAsP; MQW lasers; coupling strength; distributed feedback lasers; long haul fibre links; optical fibre link transmission penalty; phase difference; random facet phases; ridge waveguide; single mode fibre model; travelling wave laser model; Bragg gratings; Distributed feedback devices; Fiber lasers; Laser feedback; Laser modes; Optical coupling; Optical fiber devices; Packaging; Quantum well devices; Waveguide lasers;
Conference_Titel :
Lasers and Electro-Optics, 1999. CLEO '99. Summaries of Papers Presented at the Conference on
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
1-55752-595-1
DOI :
10.1109/CLEO.1999.834132
