Accession Number:

ADA257217

Title:

Satellite to Submarine Laser Communications (SLC)-Advanced Filter Technology

Descriptive Note:

Final technical rept. 1 Aug 1990-30 Nov 1991

Corporate Author:

LOCKHEED MISSILES AND SPACE CO INC PALOALTO CA RESEARCH AND DEVELOPMENT DIV

Personal Author(s):

Report Date:

1992-01-01

Pagination or Media Count:

58.0

Abstract:

This final report describes results of work to design, fabricate, and test narrow bandwidth, wide field of view FOV acousto-optic tunable filters AOTFs operating in the green spectral region. Such filters have potential for application in satellite to submarine optical communications SLC links. The AOTF tunability has advantages for both downlink and uplink communications. The motivation of the technical approach was to operate in the dispersive spectral region 5200-5500A of CdS, where the high value of the dispersive constant produces narrow filter bandwidths. The goal of the work was to test the concept and characterize a filter based on CdS, limited by crystal absorption to wavelengths 5300 A or longer. For AOTFs in the blue and blue-green spectral regions, where the water losses in the optical link are lower, subsequent programs would investigate filters based on ZnS or the mixed crystals ZnxCdl-xS, materials are not presently available in large sizes. A dispersive AOTF DAOTF based on CdS was fabricated and tested. The filter bandwidth ranged from 1 A to 3 A in the 5250-5400 A region. With one exception, polar angle FOV, the measured filter characteristics conform well-to performance predicted by the models developed in the course of the work.

Subject Categories:

  • Optics
  • Human Factors Engineering and Man Machine Systems
  • Command, Control and Communications Systems

Distribution Statement:

APPROVED FOR PUBLIC RELEASE