Low-Absorption Grating Beam Samplers

Jayanta K. Guha; James A. Plascyk

doi:10.1117/12.957053

4 April 1979 Low-Absorption Grating Beam Samplers

Jayanta K. Guha, James A. Plascyk

Proceedings Volume 0171, Optical Components: Manufacture and Evaluation; (1979) https://doi.org/10.1117/12.957053
Event: Los Angeles Technical Symposium, 1979, Los Angeles, United States

Abstract

A development program involving the design, fabrication and testing of low-efficiency, low-absorption grating beam samplers is described. Two different basic designs were selected for development. The first design is a low-efficiency grating with a high reflectivity multi-layer dielectric coating. The second design is a "buried grating", which consists of a blazed grating under a ZnSe spacer layer, with a high reflectivity multilayer overcoat. The fabrication problems associated with each type of beam sampler are discussed. The comparison of experimentally measured absorptivity and efficiency with values obtained from computer cal-culations are presented. An additional effort currently underway to make very low absorptivity beam samplers by generating periodic refractive index variations in the dielectric stack is also discussed.

Citation Download Citation

Jayanta K. Guha and James A. Plascyk "Low-Absorption Grating Beam Samplers", Proc. SPIE 0171, Optical Components: Manufacture and Evaluation, (4 April 1979); https://doi.org/10.1117/12.957053

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