Galileo Electro-optics Corporation

Spectran Corporation

Cornelius T Moynihan

Lee M Cook

Lubos J Vacha

Peter C Schultz

Martin G Drexhage

Tracey L Margraf

Satyabrata Raychaudhuri

Barry B Harbison

Ken C Cadien

Reza Mossadegh

The photorefractive effect results in a change in the refractive index of bulk chalcogenide glass when it is exposed to certain wavelengths of light, in particular, sub-band-gap light. The effect results in a variety of device structures including a fiber optic faceplate; an optical waveguide; a fiber tap; a lens and a Bragg grating. Methods for fabricating the various devices are described.

Photorefractive effect in bulk chalcogenide glass and devices made

Photorefractive effect in bulk glass and devices made therefrom

Non-oxide or heavy metal fluoride glass optical fiber with or without a cladding and coated with an outer layer of an oxide glass having a glass transition temperature of less than 400.degree. C. and a thermal expansion coefficient of less than about 19.times.10.sup.-6.C.sup.-1. Also, a method of making and providing such coatings on non-oxide or fluoride glass, and fiber optic products prepared by such methods.

Oxide coatings for fluoride glass

A hermetically sealed optical fiber product comprising a fluoride or other non-silica based glass optical fiber and a hermetic coating of carbon, a metal, a fluoride, a metalloid or a ceramic compound in a thickness sufficient to impart moisture resistance to the optical fiber product.

Hermetic coatings for non-silica based optical fibers

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Watervliet, NY, United States of America

Cornelius T Moynihan