Westinghouse Electric Corporation

Northrop Grumman Systems Corporation

Emmanuel P Supertzi

Narsingh Bahadur Singh

James P McHugh

Robert Mazelsky

Tom Henningsen

Richard P Storrick

Kenneth B Steinbruegge

Sambamurthy Sriram

Crystals formed of Tl.sub.3 AsS.sub.3 provide very good materials for the nonlinear optical conversion efficiency. The crystals are useful in nonlinear optical devices such as harmonic generators and optical parametric oscillators, and in linear applications such as acousto-optical devices. The method of preparing such crystals is also disclosed.

Thallium arsenic sulfide crystals (t1.sub.3 AsS.sub.3) high efficiency

Crystals formed of a solid-solution of Tl.sub.3 AsSe.sub.3 and Tl.sub.1 AsS.sub.3 provide very good materials for the nonlinear optical conversion efficiency. The crystals are useful in nonlinear optical devices such as harmonic generators and optical parametric oscillators, and in linear applications such as acousto-optical devices. The method of preparing such crystals is also disclosed.

Solid solution crystals of Tl.sub.3 AsSe.sub.3 and Tl.sub.3 AsS.sub.3

An infrared wire grid polarizer is fabricated on an infrared transmissive substrate and consists of alternating transmissive and conductive zones disposed thereon. These polarizers are particularly well suited for use with acoustic-optic tunable filters and can be employed as input and output polarizers therewith. A method of manufacturing a wire grid polarizer with at least 4000 conductors per millimeter is disclosed. The infrared transmissive substrate is selected from the group consisting of silicon crystal and gallium arsenide crystal.

Wire grid polarizer

Growing community of inventors

Pittsburgh, PA, United States of America

Emmanuel P Supertzi