Improved Birefringent Optical Coupler.
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.
Document Details
- Document Type
- Technical Report
- Publication Date
- Apr 01, 1974
- Accession Number
- ADD000460
Entities
People
- Larry B Stotts
Organizations
- United States Department of the Navy