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Optical Engineering

Mirrored line-of-sight input nodes for embedded optical waveguides
Author(s): Michael E. Teitelbaum; Danny O'Brien; Eric D. Wetzel; Keith W. Goossen
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Paper Abstract

A novel method for passive coupling of light to optical communication links embedded in composite structures has been explored. The use of 45-deg-angled mirrors integrated directly in poly-(methylmethacrylate) fibers as an input node coupling technique was characterized under conditions of varying refractive index. Mirrors were integrated into the fiber through polishing of the endface to a 45-deg angle and then thermal evaporation of Ag metal. To explore angular tolerances and sensitivity to alignment errors, the efficiency of the node was characterized as a function of source position and angle of incidence. Coupling loss as low as -0.39 dB was measured for normal incidence while the input node was immersed in a fluid with refractive index of 1.33. Ray tracing simulations were used to model the coupling of light to fabricated input nodes and showed good agreement with experiments.

Paper Details

Date Published: 1 November 2008
PDF: 8 pages
Opt. Eng. 47(11) 115005 doi: 10.1117/1.3028334
Published in: Optical Engineering Volume 47, Issue 11
Show Author Affiliations
Michael E. Teitelbaum, Univ. of Delaware (United States)
Danny O'Brien, Army Research Lab. (United States)
Eric D. Wetzel, Army Research Lab. (United States)
Keith W. Goossen, Univ. of Delaware (United States)

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