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Optical Engineering

Directional multimode fiber couplers in the mid-infrared
Author(s): Israel Tugendhaft; Aharon Bornstein; Yitzhak Weissman; Amos A. Hardy
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Paper Abstract

Construction and characterization of the first multimode fiber couplers in the mid-IR region (2 to 10 μm) are reported. These couplers are made of step-index As2Se3 chalcogenide glass fibers whose cores were brought to a contact along a certain distance. Far-field measurements using selective angular excitation indicated a typical coupling ratio of 15% (8.2 dB) from couplers made of 550-μm core diameter fibers with a 10-cm interaction length. The excess insertion loss was less than 0.2 dB. Strong mode mixing caused by the coupling mechanism is observed, resulting in a significant broadening of the radiation distribution.

Paper Details

Date Published: 1 October 1995
PDF: 4 pages
Opt. Eng. 34(10) doi: 10.1117/12.210769
Published in: Optical Engineering Volume 34, Issue 10
Show Author Affiliations
Israel Tugendhaft, Soreq Nuclear Research Ctr. (Israel)
Aharon Bornstein, Soreq Nuclear Research Ctr. (Israel)
Yitzhak Weissman, Soreq Nuclear Research Ctr. (Israel)
Amos A. Hardy, Tel Aviv Univ. (Israel)

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