Title :
Analysis of tunable semiconductor lasers with co-directional grating-assisted coupler filter
Author :
Hong, J. ; Huang, W.-P.
Author_Institution :
Dept. of Electr. & Comput. Eng., Waterloo Univ., Ont., Canada
Abstract :
A general theoretical model is established for tunable semiconductor lasers with a built-in co-directional grating-assisted vertical coupler filter. Possible internal reflection at the gain-coupler junction is considered and simple expressions for the lasing wavelengths/threshold gain derived. Mechanisms affecting the longitudinal mode selectivity are examined.<>
Keywords :
diffraction gratings; laser accessories; laser modes; laser theory; laser tuning; optical couplers; optical filters; reflectivity; semiconductor lasers; co-directional grating-assisted coupler filter; gain-coupler junction; internal reflection; lasing wavelengths; longitudinal mode selectivity; threshold gain; tunable semiconductor lasers; vertical coupler filter; Distributed feedback devices; Electrons; Filters; Gratings; Laser modes; Laser theory; Optical coupling; Quantum well lasers; Semiconductor lasers; Tunable circuits and devices;
Journal_Title :
Photonics Technology Letters, IEEE
