Title :
Broad-range wavelength-tunable superstructure grating (SSG) DBR lasers
Author :
Tohmori, Yuichi ; Yoshikuni, Yuzo ; Ishii, Hiroyuki ; Kano, Fumiyoshi ; Tamamura, Toshiaki ; Kondo, Yasuhiro ; Yamamoto, Mitsuo
Author_Institution :
Opto-Electronics Lab., NTT, Kanagawa, Japan
fDate :
6/1/1993 12:00:00 AM
Abstract :
A broad tuning range is demonstrated in tunable DBR lasers with a novel superstructure grating (SSG). These SSG reflectors were fabricated by electron-beam lithography, and grating performance was evaluated by measuring the transmittance characteristics of a ridge-type SSG reflector. Incorporating this SSG reflector into distributed-Bragg-reflector (DBR) laser results in lasers that can be tuned over a wide wavelength range by using coarse and fine tuning mechanisms. Wavelength-tunable SSG DBR lasers were fabricated and operated under low-threshold CW conditions. Wavelength tuning ranges of 50 and 100 nm were designed and experimentally measured to be 50 and 83 nm, respectively, with single-mode operation
Keywords :
diffraction gratings; distributed Bragg reflector lasers; laser accessories; laser tuning; semiconductor lasers; broad range wavelength tunable superstructure grating DBR lasers; broad tuning range; distributed Bragg reflector lasers; electron-beam lithography; fine tuning mechanisms; grating performance; low threshold continuous wave conditions; ridge type superstructure grating reflector; transmittance characteristics; Distributed Bragg reflectors; Distributed feedback devices; Gratings; Laser feedback; Laser transitions; Laser tuning; Optical tuning; Refractive index; Tunable circuits and devices; Wavelength measurement;
Journal_Title :
Quantum Electronics, IEEE Journal of
