Accession Number : ADD000461

Title :   Improved Optical Transmit-Receiver Coupler.

Descriptive Note : Patent Application,


Personal Author(s) : Stotts,Larry B

Report Date : 01 Apr 1974

Pagination or Media Count : 17

Abstract : In the patent application an optical transmit-receive coupler includes a first transparent, electrically conductive coating contiguous to a light transmission path. A second transparent electrically conductive coating is disposed relative to the first transparent, electrically conductive coating so that a nematic liquid crystal material is contained therebetween. A source of a.c. potential is connected to the respective electrically conductive coatings to develop an electric field across the nematic liquid crystal material, causing it to be molecularly arranged to give the optical effect of a diffraction grating. Means for varying the frequency of the a.c. potential causes commensurate variation in the periodic vorticity of the nematic liquid crystal material and thereby selectively determines the wavelengths of light energy coupled through the liquid crystal material by diffraction.

Descriptors :   *Optical waveguides, *Waveguide couplers, *Transmitter receivers, Patents, Liquid crystals, Optical filters, Optical properties, Electrooptics, Diffraction gratings, Electric fields, Electrical conductivity, Light transmission, Modulators, Phase transformations

Subject Categories : Optics

Distribution Statement : APPROVED FOR PUBLIC RELEASE