Title :
Influence of a localized scattering center upon the spectral characteristics of a distributed-feedback structure
Author_Institution :
ENIB/RESO, Brest, France
Abstract :
We investigate the influence of a process-induced localized impurity upon the spectral characteristics of distributed-feedback (DFB) structures in the frame of a transfer matrix formalism. Its interaction with the intracavity field is shown to exhibit a modally selective behavior, possibly leading to a modal degeneracy lift at threshold. This effect, very sensitive to the location of the impurity with respect to the grating phase, could prove of interest in enhancing the performance of DFB lasers or filters.
Keywords :
distributed feedback lasers; laser modes; laser theory; matrix algebra; optical filters; semiconductor device models; semiconductor lasers; DFB lasers; DFB structure; distributed-feedback structure; grating phase; intracavity field; localized scattering center; modal degeneracy lift; modally selective behavior; optical filters; process-induced localized impurity; sensitive; spectral characteristics; transfer matrix formalism; Distributed Bragg reflectors; Filtering; Gratings; Laser modes; Optical filters; Optical scattering; Propagation constant; Semiconductor device modeling; Semiconductor impurities; Semiconductor lasers;
Journal_Title :
Photonics Technology Letters, IEEE
