Coherent Optical Adaptive Techniques (COAT)
Abstract
Coherent optical adaptive techniques are designed to overcome degradations experienced by optical beams propagating in media with fixed or time-varying distortions. This report presents results from the calibration phase of an experimental eighteen-element, self-adaptive optical phased array. Initial tests on a turbulent, outdoor propagation range are also presented. Computer simulation studies have demonstrated the advantages of a divider-AGC network and have detailed the theoretical system performance with glints of varying reflectivities, with various signal-to-noise ratios, and with different receiver aperture diameters. Phase shifter hysteresis was found to have a negligible effect on system performance. Laboratory calibration measurements both with and without artificial turbulence show that the experimental COAT system performs very close to theoretical predictions.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1974
- Accession Number
- AD0783281
Entities
People
- J. L. Pearson
- L. S. Horwitz
- R. M. Kubo
- T. J. Walsh
- W. B. Bridges
Organizations
- HRL Laboratories