Accession Number:

ADA001840

Title:

Electromagnetic Theory of Distributed Feedback Lasers in Periodic Dielectric Waveguides.

Descriptive Note:

Interim rept.,

Corporate Author:

CALIFORNIA INST OF TECH PASADENA ANTENNA LAB

Personal Author(s):

Report Date:

1974-09-01

Pagination or Media Count:

181.0

Abstract:

A theory for distributed feedback lasers in transversely bounded structures is developed. The space harmonics approach is used to discuss the general properties of periodic structures. The coupled mode approach is used to develop expressions for the threshold gain, longitudinal mode structure, and electromagnetic field distribution for distributed feedback lasers. Three basic structures are considered for distributed feedback lasers-thin film waveguides, diffusion waveguides, and fiber waveguides. Equations for the amplification of a waveguide mode that extends transversely over both regions with and without gain are derived. Analytical expressions are derived for coupling between modes in periodically perturbed dielectric waveguides. Sinusoidal perturbations of the electric permittivity and of the waveguide boundary are considered.

Subject Categories:

  • Lasers and Masers

Distribution Statement:

APPROVED FOR PUBLIC RELEASE