Thin Film Light Sources for Integrated Optics.
Abstract
The study and experimental demonstration of concepts adapting existing laser media to a planar format such that it can be coupled to an optical waveguide compatible with representative integrated optical circuits is presented. The approach considers distributed-feedback waveguide lasers incorporating a coupler to extract the radiation and launch the radiation into the output waveguide. The distributed-feedback concept is employed because it is compatible with planar processing technology, eliminating orthogonal boundaries which are necessary for Fabry-Perot resonant structures. Several laser-waveguide coupler approaches amenable to both monolithic and hybrid approaches were investigated. Distributed-feedback stimulated emission was observed using both the fundamental (1150 A) and third harmonic (3500 A) gratings in an electron injection laser, using a quasi-double-heterostructure (large optical cavity), where both liquid-phase and vapor-phase epitaxy were employed. A new side wall coupling technique appropriate for GaAs electron injection lasers was demonstrated which is compatible with either a distributed-feedback or Fabry-Perot resonant structure. This latter hybrid configuration was demonstrated to couple with a GaAlAs epitaxial waveguide on Al2O3 Through the evanescent field associated with the longitudinal active waveguide region.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1975
- Accession Number
- ADA009901
Entities
People
- D. B. Anderson
- J. E. Coker
- J. T. Boyd
- R. R. August
- R. Shubert