Accession Number : ADA320096

Title :   Fabrication of a 20.5 Inch Diameter Segmented Silicon Annular Optic Prototype for the Roma Program,

Corporate Author : TRW SYSTEMS GROUP REDONDO BEACH CA

Personal Author(s) : Hassell, Frank R.

PDF Url : ADA320096

Report Date : SEP 1996

Pagination or Media Count : 15

Abstract : Recent advancements in single crystal silicon material science and fabrication capabilities and very low absorption (VLA) multi-layer dielectric coating technology have led to the development of uncooled, large aperture, high power mirrors for high energy laser (HEL) systems. Based on this success, a segmented single-crystal silicon substrate concept has been selected as the baseline fabrication approach for uncooled 1.2 meter diameter resonator annular optics for the Alpha space based high energy laser. The objective of this Resonator Optics Materials Assessment (ROMA) task was to demonstrate all of the key fabrication processes required to fabricate the full sized annular optics for the Alpha space based high energy laser. This paper documents the fabrication of a half-scale annular optic prototype (AOP) of the Alpha laser rear cone.

Descriptors :   *MIRRORS, *OPTICAL COATINGS, *LASER COMPONENTS, SCALE MODELS, FABRICATION, OPTICAL MATERIALS, MOLYBDENUM, DIELECTRIC PROPERTIES, BASE LINES, SILICON, HIGH ENERGY LASERS, RESONATORS, APERTURES, SILICON CARBIDES.

Subject Categories : Optics
      Coatings, Colorants and Finishes
      Lasers and Masers

Distribution Statement : APPROVED FOR PUBLIC RELEASE