Title :
High-speed intensity modulation of 1.5 μm DBR lasers with wavelength tuning
Author :
Kano, Fumiyoshi ; Fukuda, Mitsuo ; Sato, Kenji ; Oe, Kunishige
Author_Institution :
NTT Opto-Electron. Lab., Kanagawa, Japan
fDate :
8/1/1990 12:00:00 AM
Abstract :
Intensity modulation characteristics of a 1.5-μm butt-jointed DBR (distributed-Bragg-reflector) laser with wavelength tuning were studied. A 3-dB modulation bandwidth of 9 GHz and a high relaxation oscillation frequency of more than 10 GHz were obtained for the DBR laser. These characteristics were not affected by changing the lasing wavelength. The chirping width of the DBR laser is lower than that of the distributed feedback (DFB) laser. A clear eye opening and low chirping characteristics were obtained under 5-Gb/s nonreturn to zero (NRZ) pseudorandom modulation with a sufficient extinction ratio
Keywords :
distributed Bragg reflector lasers; laser transitions; laser tuning; optical modulation; semiconductor junction lasers; 1.5 micron; 9 GHz; DBR lasers; NRZ pseudorandom modulation; butt jointed laser; chirping width; clear eye opening; distributed-Bragg-reflector; extinction ratio; high relaxation oscillation frequency; high speed intensity modulation; low chirping characteristics; modulation bandwidth; nonreturn to zero; semiconductor laser; wavelength tuning; Bandwidth; Chirp modulation; Distributed Bragg reflectors; Distributed feedback devices; Extinction ratio; Frequency; Intensity modulation; Laser feedback; Laser tuning; Optical signal processing;
Journal_Title :
Quantum Electronics, IEEE Journal of
