Open AccessEffects of self-mixing interference on gain-coupled distributed-feedback lasers
Author(s) -
Junping Zhou,
Ming Wang
Publication year - 2005
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/opex.13.001848
Subject(s) - laser linewidth , optics , laser , oscillation (cell signaling) , mixing (physics) , interference (communication) , four wave mixing , materials science , coupling (piping) , distributed feedback laser , semiconductor laser theory , physics , nonlinear optics , channel (broadcasting) , genetics , electrical engineering , quantum mechanics , metallurgy , biology , engineering
The effects of self-mixing interference on gain-coupled (GC) distributed-feedback (DFB) lasers are analyzed. From coupled-wave theory, the oscillation frequency and threshold gain variations are theoretically deduced. The influences on self-mixing from the coupling length coefficient, the linewidth enhancement factor of the GC DFB laser, and the reflection coefficient of the external reflector are discussed along with numerical analysis and are compared with the effects of self-mixing interference of lambda/4 phase-shifted DFB lasers and Fabry-Perot (F-P) lasers. Our results show that high-accuracy self-mixing sensors can be obtained with GC DFB lasers.