Theory of optical-waveguide distributed feedback lasers: A Green's functions approach

The total scattered electric field of a periodic dielectric optical waveguide is derived in terms of the Green's functions of the unperturbed structure. A condition for self-excitation that takes into account the coupling between radiation and guided modes is obtained in a very general manner a...

Full description

Saved in:
Bibliographic Details
Published in:IEEE journal of quantum electronics 1977-10, Vol.13 (10), p.843-848
Main Authors: Ghizoni, C., Ballantyne, J., Chung Tang
Format: Article
Language:English
Subjects:
Distributed feedback devices
Gratings
Green's function methods
Laser feedback
Laser modes
Laser theory
Optical feedback
Optical scattering
Optical waveguides
Waveguide lasers
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The total scattered electric field of a periodic dielectric optical waveguide is derived in terms of the Green's functions of the unperturbed structure. A condition for self-excitation that takes into account the coupling between radiation and guided modes is obtained in a very general manner and, therefore, is valid for arbitrary periods of the grating structure. Results show that the effect of the coupling between the oscillating guided field and radiation modes is to change the dependence of the threshold gain on the amplitude of the periodic perturbation: increasing the depth of the grating beyond an optimum value causes an increase in threshold due to larger coupling to radiation modes.
ISSN:0018-9197
1558-1713
DOI:10.1109/JQE.1977.1069238