Title :
Extended tuning range in sampled grating DBR lasers
Author :
Jayaraman, V. ; Mathur, A. ; Coldren, L.A. ; Dapkus, P.D.
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., Santa Barbara, CA, USA
fDate :
5/1/1993 12:00:00 AM
Abstract :
The authors demonstrate, for the first time, successful implementation of a distributed Bragg reflector laser with two sampled grating mirrors, which they previously predicted should give tuning range in excess of 50 nm. This device uses a uniform grating pitch throughout the structure, and relies on the same fabrication technology as a standard DBR laser. Initial results show 57 nm of mathematical tuning at 1.475 mu m with side-mode suppression ratio (SMSR)>30 dB over much of the tuning range. The observed change in operating wavelength versus mirror currents along with below threshold spectra agree with theoretical expectations.<>
Keywords :
diffraction gratings; distributed Bragg reflector lasers; laser accessories; laser modes; laser tuning; mirrors; semiconductor lasers; 1.475 micron; IR; InP-InGaAs; below threshold spectra; distributed Bragg reflector laser; fabrication technology; mirror currents; operating wavelength; sampled grating DBR lasers; sampled grating mirrors; semiconductors; side-mode suppression ratio; tuning range; uniform grating pitch; Distributed Bragg reflectors; Gratings; Holography; Laser theory; Laser tuning; Lithography; Mirrors; Optical device fabrication; Optical reflection; Waveguide lasers;
Journal_Title :
Photonics Technology Letters, IEEE
