Accession Number : ADD018674

Title :   Infrared Optical Fiber Coupler, Background of the Invention

Corporate Author : OFFICE OF NAVAL RESEARCH ARLINGTON VA

Personal Author(s) : Schaafsma, David T ; Sanghera, Jasbinder S ; Aggarwal, Ishwar D

PDF Url : ADD018674

Report Date : 26 Nov 1997

Pagination or Media Count : 24

Abstract : An infrared fiber optic coupler and a method for making an infrared fiber optic coupler are disclosed. The method comprises the steps of: braiding first and second infrared transmitting glass fibers to form first and second arms of the infrared fiber optic coupler; inserting the braided first and second infrared transmitting glass fibers through a furnace; securing the braided glass fibers by two clamping mechanisms on first and second sides of the furnace; purging the furnace of water vapor and oxygen with steady flow of inert gas through the furnace; allowing infrared light to pass through one of the first and second arms of the coupler; detecting the infrared signals from the first and second arms of the coupler in first and second infrared detectors; comparing the detected signals to develop a coupling ratio between the first and second arms of the coupler; turning the furnace on to heat the first and second braided glass fibers to the point where the glass fibers begin to darken in color; translating the second clamping mechanism to produce a tautness on the first and second braided glass fibers until the desired coupling ratio has been achieved; turning the furnace off; maintaining tension on the first and second braided glass fibers until the fibers cool to rigidity; and turning off the gas flow.

Descriptors :   *FIBER OPTICS, *PATENT APPLICATIONS, *INFRARED DETECTORS, *COUPLERS, COUPLING(INTERACTION), RATIOS, COOLING, GASES, OXYGEN, OPTICAL WAVEGUIDES, SIGNALS, GLASS FIBERS, BACKGROUND, SIDES, INERT MATERIALS, INFRARED RADIATION, BRAIDS, RIGIDITY, FURNACES, INVENTIONS, WATER VAPOR, GAS FLOW, STEADY FLOW, CLAMPS, WAVEGUIDE COUPLERS, PURGING

Subject Categories : Optical Detection and Detectors
      Infrared Detection and Detectors

Distribution Statement : APPROVED FOR PUBLIC RELEASE