Title :
Broad-range wavelength tuning in DBR lasers with super structure grating (SSG)
Author :
Tohmori, Yuichi ; Yoshikuni, Yuzo ; Tamamura, Toshiaki ; Ishii, Hiroyuki ; Kondo, Yasuhiro ; Yamamoto, Mitsuo
Author_Institution :
NTT Optoelectron., Kanagawa, Japan
Abstract :
Broad-range wavelength tuning is demonstrated in tunable distributed Bragg reflector (DBR) lasers with the super structure grating (SSG) proposed. The SSG is fabricated by electron beam exposure lithography. The grating performance is measured by transmittance characteristics of the SSG reflector. A maximum tuning range of 63 nm is obtained under the CW condition while keeping a single longitudinal mode. In a 50-nm tuning range, the threshold current variation is as low as 5.0-9.5 mA.<>
Keywords :
diffraction gratings; distributed Bragg reflector lasers; electron beam lithography; laser modes; laser tuning; 5.0 to 9.5 mA; CW condition; DBR lasers; broad range wavelength tuning; electron beam exposure lithography; single longitudinal mode; super structure grating; threshold current variation; transmittance characteristics; Distributed Bragg reflectors; Distributed feedback devices; Electrons; Gratings; Indium phosphide; Laser modes; Laser tuning; Masers; Optical tuning; Semiconductor lasers;
Journal_Title :
Photonics Technology Letters, IEEE
