COAT Measurements and Analysis.
Abstract
Coherent Optical Adaptive Techniques (COAT) offer promise in overcoming beam distortions experienced by high power optical beams propagating in a turbulent absorbing atmosphere. This report describes the first phase of a program to evaluate the effectiveness of multidither COAT in eliminating thermal blooming distortions. An absorbing gas cell, wind generation mechanism, and gas handling station have been constructed for use in visible wavelength laboratory experiments. An optical system has been designed and built which will produce beam parameters and blooming levels which can be scaled to interesting scenarios at 10.6 micrometers. Preliminary measurements of blooming compensation using an 18-element, 0.488 micrometers COAT system have been made with a thin static, liquid-filled cell as the blooming medium. The COAT system increased the target irradiance by more than a factor of 10 and reduced the beamwidth by a factor of 5.4 from the uncorrected bloomed case.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1975
- Accession Number
- ADA006105
Entities
People
- J. E. Pearson
Organizations
- HRL Laboratories