Title :
Basic analysis of AR-coated, partly gain-coupled DFB lasers: the standing wave effect
Author :
David, Klaus ; Buus, Jens ; Baets, Roel G.
Author_Institution :
Gent Univ., IMEC, Belgium
fDate :
2/1/1992 12:00:00 AM
Abstract :
A theoretical analysis of distributed feedback (DFB) lasers with mixed gain and index coupling (partly gain-coupled DFB) is given for perfect antireflection (AR) coatings. Analytical expressions for the threshold gain, facet loss, and the relative depth of the standing wave pattern are derived. At the same time the importance of the standing wave effect and its consideration by coupled mode equations is shown. For purely gain-coupled DFB lasers, simple expressions for the effective linewidth enhancement factor and the longitudinal spontaneous emission factor are derived. In addition, various approximations describing the performance of purely gain-coupled DFB lasers are given
Keywords :
antireflection coatings; distributed feedback lasers; laser modes; laser theory; optical films; semiconductor junction lasers; spectral line breadth; AR-coated; coupled mode equations; diode lasers; distributed feedback; effective linewidth enhancement factor; facet loss; index coupling; longitudinal spontaneous emission factor; mixed gain; partly gain-coupled DFB lasers; perfect antireflection coatings; relative depth; standing wave effect; standing wave pattern; threshold gain; Coatings; Equations; Laser feedback; Laser modes; Laser theory; Optical coupling; Optical feedback; Optical reflection; Pattern analysis; Spontaneous emission;
Journal_Title :
Quantum Electronics, IEEE Journal of
