Accession Number : ADD000460

Title :   Improved Birefringent Optical Coupler.

Descriptive Note : Patent Application,

Corporate Author : DEPARTMENT OF THE NAVY WASHINGTON D C

Personal Author(s) : Stotts,Larry B

Report Date : 01 Apr 1974

Pagination or Media Count : 16

Abstract : In the patent application a transmit/receive optical coupler controls the transmission of light energy between first and second optical paths separated by a medium of lower index of refraction for confining at least one of the optical paths to total internal reflection. An anisotropic nematic liquid crystal material which has an index of refraction substantially equal to the separating medium when in a state of homeotropic alignment is positioned between the optical paths, replacing a portion of the separating medium. Electrodes are disposed contiguous to the liquid crystal material and are connectable to a source of electrical potential. Upon the application of the electrical potential, an electric field is impressed upon the liquid crystal material inducing a higher indux of refraction, frustrating the total internal reflection, and coupling light energy between the two optical paths.

Descriptors :   *Optical waveguides, *Waveguide couplers, *Transmitter receivers, Patents, Liquid crystals, Refractive index, Birefringence, Electrooptics, Electric fields, Optical properties

Subject Categories : Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE