Optical waveguides – With optical coupler – Particular coupling structure
Patent
1997-11-26
1999-09-07
Ullah, Akm E.
Optical waveguides
With optical coupler
Particular coupling structure
65389, G02B 626
Patent
active
059499354
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 a 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.
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Publication, "Connectors, Splices, and Couplers for Infrared Transmitting d Optical Fibers" by O. Eyal et al., Applied Optics, vol. 36, No. 6, Feb. 20, 1997, pp. 1185-1190.
Publication, Infrared Evanescent Absorption Spectroscopy of Toxic Chemicals Using Chalcogenide Glass Fibers by Jas S. Sanahera et al., Journal of the American Ceramic Society, vol. 78, No. 8, Aug. 1995, pp. 2198-2202.
Publication, "Reflection Intensity Optical Fiber Sensors for the Mid-Infrared" by I Tugendhaft et al., Applied Optics, vol. 36, No. 6, Feb. 20, 1997, pp. 1297-1302.
Sanghera Jasbinder S.
Schaafsma David T.
Jameson George
McDonnell Thomas E.
The United States of America as represented by the Secretary of
Ullah Akm E.
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