Multiple Coupled Waveguide Laser Array.
Abstract
The purpose of this effort was to extend the principle of wavelength mode coupling previously established for two waveguides to a two dimensional array. In the theoretical portion of the program, two-dimensional array mode relative oscillator strengths (E-field distributions) were derived analytically for the first time. Fourier analysis of these array-modes indicated that almost an (nxm)2 increase (as for an array which is superimposed into one waveguide)in the far-field peak irradiance distribution would be achieved. The experimental program employed 1x7 and 2x3 arrays. Severe vacuum and materials problems were encountered with the 1x7 array. The 2x3 array achieved output powers of up to 8W per channel; on installation of ZnSe coupling windows the power decreased by an order of magnitude. Lasing could be achieved with all channels. No phase-locking was observed with either the 1x7 or 2x3 array for any of twenty different resonator configuration employed, including those using focussed and unfocussed grating. Folded resonator modes were found to dominate certain resonator configurations.
Document Details
- Document Type
- Technical Report
- Publication Date
- Nov 05, 1986
- Accession Number
- ADA177448
Entities
People
- Douglas G. Youmans