Title :
Gain margin analysis of distributed feedback lasers for both transverse electric and magnetic modes
Author :
Yu, B.M. ; Liu, Jia-Ming
Author_Institution :
Dept. of Electr. Eng., California Univ., Los Angeles, CA, USA
fDate :
4/1/1992 12:00:00 AM
Abstract :
A theoretical analysis of the gain margin with both transverse electric (TE) and transverse magnetic (TM) modes in distributed feedback (DFB) lasers of second-order gratings and various structural parameters is presented. Though the dominant mode is usually a TE mode, one of the TM modes often becomes the secondary mode with the second lowest threshold and seriously affects the single-mode characteristics of DFB lasers. To design DFB lasers with a large gain margin, proper amounts of facet reflectivity for both polarizations and control of the spatial phase of the grating at the facet are required
Keywords :
diffraction gratings; distributed feedback lasers; laser modes; semiconductor junction lasers; design; distributed feedback lasers; facet reflectivity; gain margin analysis; polarizations; second-order gratings; secondary mode; single-mode characteristics; spatial phase; structural parameters; theoretical analysis; transverse electric modes; transverse magnetic modes; Distributed feedback devices; Gratings; Laser feedback; Laser modes; Laser theory; Magnetic analysis; Optical design; Reflectivity; Structural engineering; Tellurium;
Journal_Title :
Quantum Electronics, IEEE Journal of
