Accession Number:

ADA099159

Title:

Blue/Green Coupled Wave Filter Demonstration

Descriptive Note:

Final rept. 4 Jun 1980-28 Feb 1981

Corporate Author:

HUGHES RESEARCH LABS MALIBU CA

Personal Author(s):

Report Date:

1981-05-01

Pagination or Media Count:

56.0

Abstract:

The performance of AgGaS2 iso-index coupled-wave electro-optic filters in wide-field of view FOV operation has been characterized in detail, both theoretically and experimentally. The principal conclusions of this program are 1 The effect of optical activity on the filter passband is negligible for input light cones smaller than approx. f10 3 deg half-angle. 2 For larger FOVs, the main lobe of the filter transfer characteristic broadens considerably, and increased out-of-band transmission occurs. 3 At very large FOVs aprox. f 0.5, the peak transmittance approaches 50, virtually independent of applied electric field. 4 the effects of optical activity override attempts to narrow the passband by increasing filter length, resulting in an optimum crystal length of about 3 mm and a minimum passband of about 2 A for f1 FOV 1 A for f2 FOV. 5 Significant reduction in out-of-band transmission was shown, using a novel dual-element arrangement with intervening crossed polarizer.

Subject Categories:

  • Optics
  • Non-Radio Communications

Distribution Statement:

APPROVED FOR PUBLIC RELEASE