Accession Number : ADD003216

Title :   Liquid Crystal Switch for Optical Waveguide.

Descriptive Note : Patent,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Giallorenzi,Thomas G ; Schnur,Joel M

Report Date : 14 Sep 1976

Pagination or Media Count : 5

Abstract : This invention combines liquid crystals with an optical waveguide in order to couple coherent light out of and into the waveguide. The liquid crystal is one of the substances adjacent the waveguide and normally has an index of refraction less than that of the waveguide section. The liquid crystal must be highly aligned to insure guiding. The nature of the alignment i.e., homotropic or homogeneous will affect the index of refraction presented to the incoming coherent light and thus determine whether wave guiding is possible and the number of modes that can be supported. Since the indices of refraction of these liquid crystal materials is never less than 1.3 nor greater than 3.0, the liquid crystal materials must be either positive dielectric or the applied field must be such that dynamic scattering will not occur.

Descriptors :   *Optical waveguides, *Waveguide couplers, *Liquid crystals, *Patents, Refractive index, Alignment, Optical switching, Electric fields

Subject Categories : Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE