Ordered bundles of infrared-transmitting AgClBr fibers: optical characterization of individual fibers

Abstract

Silver halide $\left({\mathrm{AgCl}}_x{\mathrm{Br}}_{1-x}\right)$ crystals were extruded to form polycrystalline fibers that are highly transparent in the spectral range $3–30 \mathit{\mu }\mathrm{m}$. Ordered bundles consisting of as many as 9000 fibers were fabricated by multiple extrusion steps. The transmission loss of an individual fiber in the 100-fiber bundles was 0.12 dB/cm, and the cross talk between neighboring fibers in the 900-fiber bundles was 25%. Thermal images of bodies at room temperature have been transmitted through the bundles. Such ordered bundles provide a solution for the problem of thermal imaging in regions where there is no line of sight between a thermal camera and a warm object.

© 2000 Optical Society of America

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