Title :
Yield estimation of 10-Gb/s electroabsorption modulator-integrated DFB lasers due to chirp
Author :
Kim, Yonggyoo ; Nam, Seungki ; Jeong, Jichai
Author_Institution :
Dept. of Radio Eng., Korea Univ., Seoul, South Korea
fDate :
4/1/2002 12:00:00 AM
Abstract :
We investigate the yield of 10-Gb/s electroabsorption modulator integrated-distributed feedback (EAMI-DFB) lasers for 40- and 60-km transmissions due to the chirp. The yield has been estimated from the effective positive chirp (EPC) capable to transmit signals over 40 and 60 km within 2-dB dispersion power penalty. The signals with EPC of 0.48 and 0.24 /spl Aring/ can be transmitted over 40 and 60 km with less than 2-dB power penalty, respectively. The chirp is calculated from a large signal dynamic model of EAMI-DFB lasers using the time-dependent transfer matrix method (TMM). The results suggest that the yield is mostly dependent on coupling constant (/spl kappa/L) and should be set around 1.3 for high yield while maintaining low facet reflectivity at modulator.
Keywords :
chirp modulation; distributed feedback lasers; electro-optical modulation; electroabsorption; integrated optics; matrix algebra; optical communication equipment; reflectivity; semiconductor lasers; 10 Gbit/s; 40 km; 60 km; Gb/s electroabsorption modulator integrated DFB lasers; Gb/s electroabsorption modulator-integrated DFB lasers; coupling constant; dispersion power penalty; effective positive chirp; high yield; large signal dynamic model; low facet reflectivity; time-dependent transfer matrix method; transmit signals; yield estimation; Chirp modulation; Distributed feedback devices; Gratings; Laser feedback; Laser modes; Laser theory; Optical feedback; Optical modulation; Voltage; Yield estimation;
Journal_Title :
Photonics Technology Letters, IEEE
