Title :
Extending the transmission distance of a directly modulated laser source using Bragg grating dispersion compensators
Author :
Mason, P.L. ; Penty, R.V. ; White, I.H.
Author_Institution :
Sch. of Phys., Bath Univ., UK
Abstract :
Comprehensive computer modelling has been used to investigate the dependence of dispersion penalty on transmission length in an optical communications system employing a directly modulated 2.5 Gbit/s DFB laser source and an optimised fibre grating dispersion compensator. Two grating apodization schemes, tanh and Gaussian, have been compared. The 2 dB dispersion penalty transmission distance is shown to be approximately 520 km along standard monomode fibre after compensation with a 5 cm tanh grating. This represents a great improvement over the 150 km range expected for a similar uncompensated system
Keywords :
chirp modulation; diffraction gratings; distributed feedback lasers; laser feedback; optical fibre communication; optical fibre dispersion; optical fibre filters; optical modulation; optical transmitters; quantum well lasers; 150 km; 2.5 Gbit/s; 520 km; Bragg grating dispersion compensators; DFB laser source; Gaussian scheme; computer modelling; directly modulated laser source; dispersion penalty; dispersion penalty transmission distance; grating apodization schemes; optical communications system; optimised fibre grating dispersion compensator; standard monomode fibre; tanh grating; tanh scheme; transmission distance; uncompensated system;
Conference_Titel :
Optical Fibre Gratings and Their Applications, IEE Colloquium on
Conference_Location :
London
DOI :
10.1049/ic:19950091
