Fabrication of Linear Waveguides and Horn Shaped Coupling Structures.
Abstract
Coupling light from fibers to film for example integrated optic structures requires coupling over some finite length for materials which do not cleave easily. Some form of distributed coupler familiar to microwave circuitry is required. In this sense distributed means coupling over some finite aperture in the direction of propagation typically hundreds or thousands of wavelengths. This report describes a method of generating efficient couplers which do not require precise control of physical parameters and hence relax the tolerances for coupler construction. This crossed-beta coupler requires phase match between the two waveguides at only one point. Typically, this coupler may be realized by two waveguides whose respective propagation constants (beta) change linearly for a short region and cross at the phase match point. Analytical solutions for coupler efficiency and physical dimension are given. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 01, 1975
- Accession Number
- ADA016633
Entities
People
- David G. Dalgoutte
- J. H. Harris
- Robert B. Smith
Organizations
- University of Washington