Title :
A unified Green´s function analysis of complicated DFB lasers
Author :
Freeze, Jim D. ; Jensen, Michael A. ; Selfridge, Richard H.
Author_Institution :
Dept. of Electr. & Comput. Eng., Brigham Young Univ., Provo, UT, USA
fDate :
8/1/1997 12:00:00 AM
Abstract :
An efficient full-wave analysis technique for one-dimensional optical domains, known as the recursive Green´s function method (RGFM), is presented for evaluation of distributed feedback (DFB) laser cavities with arbitrary material profiles. The method first constructs the Green´s function of an inhomogeneous domain and subsequently uses Green´s theorem to determine the laser optical field, lasing wavelength, and threshold gain. The technique is applied to investigate the performance of three DFB laser structures: a chirped-grating configuration, a modulated stripe width design, and a reduced duty cycle complex-coupled device. These structures are evaluated in terms of their single-mode lasing behavior and the uniformity of the optical field within the cavity
Keywords :
Green´s function methods; chirp modulation; diffraction gratings; distributed feedback lasers; laser cavity resonators; laser modes; laser theory; recursion method; semiconductor device models; semiconductor lasers; DFB laser cavities; DFB laser structures; Green´s theorem; arbitrary material profiles; cavity optical field uniformity; chirped-grating configuration; complicated DFB lasers; distributed feedback laser cavities; efficient full-wave analysis technique; inhomogeneous domain; laser optical field; lasing wavelength; modulated stripe width design; one-dimensional optical domains; recursive Green´s function method; reduced duty cycle complex-coupled device; single-mode lasing behavior; threshold gain; unified Green´s function analysis; Chirp; Distributed feedback devices; Fiber lasers; Green´s function methods; Laser feedback; Laser modes; Laser theory; Optical feedback; Optical materials; Semiconductor lasers;
Journal_Title :
Quantum Electronics, IEEE Journal of
