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

fYear

1999

fDate

28-28 May 1999

Firstpage

240

Lastpage

241

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;

fLanguage

English

Publisher

ieee

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

Type

conf

DOI

10.1109/CLEO.1999.834132

Filename

834132