DFB LASER WITH NONUNIFORM COUPLING COEFFICIENT REALIZED BY DOUBLE-LAYER BURIED GRATING

Authors
NILSSON S KJELLBERG T KLINGA T WALLIN J STREUBEL K SCHATZ R
Citation
S. Nilsson et al., DFB LASER WITH NONUNIFORM COUPLING COEFFICIENT REALIZED BY DOUBLE-LAYER BURIED GRATING, IEEE photonics technology letters, 5(10), 1993, pp. 1128-1131
Citations number
13
Categorie Soggetti
Optics,"Physics, Applied
Journal title
IEEE photonics technology letters → ACNP
ISSN journal
10411135
Volume
5
Issue
10
Year of publication
1993
Pages
1128 - 1131
Database
ISI
SICI code
1041-1135(1993)5:10<1128:DLWNCC>2.0.ZU;2-W
Abstract
A new technique for the realization of a nonuniform grating coupling c oefficient kappa, and its implementation in distributed-feedback (DFB) lasers is presented. This technique, which is an extension of the bur ied-grating concept, offers precise control of the coupling coefficien t and enables a kappa-ratio greater than 10. DFB lasers with an asymme tric kappa-variation have been fabricated using this method. A front-t o-rear facet output power ratio close to five was obtained, qualitativ ely in agreement with simulations.