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Optical Waveguide Output Couplers Fabricated in PolymersWaveguide output couplers fabricated in Norland Optical Adhesive (NOA) #81 and AMOCO Ultradel 9020D polyimide are investigated. The output couplers are implemented using periodic relief gratings on a planar waveguide. Design theory of the couplers is based on the perturbation approach. Coupling of light from waveguide propagation modes to output radiation modes is described by coupled mode theory and the transmission line approximation of the perturbed area (grating structure). Using these concepts, gratings can be accurately designed to output a minimum number of modes at desired output angles. Waveguide couplers were designed using these concepts. These couplers were fabricated and analyzed for structural accuracy, output beam accuracy, and output efficiency. The results for the two different materials are compared.
Document ID
19990054827
Acquisition Source
Marshall Space Flight Center
Document Type
Reprint (Version printed in journal)
Authors
Watson, Michael D.
(NASA Marshall Space Flight Center Huntsville, AL United States)
Abushagur, Mustafa A. G.
(Alabama Univ. Huntsville, AL United States)
Ashley, Paul R.
(Army Missile Command Redstone Arsenal, AL United States)
Johnson-Cole, Helen
(NASA Marshall Space Flight Center Huntsville, AL United States)
Date Acquired
August 19, 2013
Publication Date
January 1, 1998
Publication Information
Publication: Optical Engineering
Publisher: Optical Engineering Society of Photo Instrumentation Engineers
Subject Category
Optics
Funding Number(s)
PROJECT: RTOP 274-62-00
Distribution Limits
Public
Copyright
Other

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