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Proceedings Paper

Mid-infrared chalcogenide fiber devices for medical applications
Author(s): Francois Chenard; Oseas Alvarez; Andrew Buff
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Paper Abstract

High-purity chalcogenide glasses and fiber draw processes enable the production of state-of-the-art mid-infrared fibers for 1.5 to 10 micron transmission. Multimode and single-mode mid-infrared fibers are produced with low-loss (<0.2 dB/m), high tensile strength (>25 kpsi), and high power laser handling capability (>11.8 MW/cm2). Chalcogenide fibers support the development of cutting-edge devices for mid-infrared medical applications. Connectorized cables transmit laser power to a sample or mid-infrared radiation to a detector. Broadband antireflection microstructures are thermally stamped on the chalcogenide fiber tip to reduce the surface reflection from 17% to <5%. Also custom fiber-optic probe bundles are made with multiple fiber legs (source, sample, signal) for reflection and backscatter spectroscopy measurement. For example, a 7 x 1 fiber probe bundle is presented. Additionally imaging fiber bundle is made to perform remote thermal and spectral imaging. Square preforms are drawn, stacked, squared and fused multiple times to produce a 64 x 64 imaging fiber bundle with fiber pixel size of 34 microns and the numerical aperture of 0.3. The 2- meter long imaging fiber bundle is small (2.2 mm x 2.2 mm), flexible (bend radius >10 mm) and transmits over the spectral range of 1.5 to 6.5 micron.

Paper Details

Date Published: 13 February 2018
PDF: 9 pages
Proc. SPIE 10488, Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XVIII, 104880S (13 February 2018); doi: 10.1117/12.2287860
Show Author Affiliations
Francois Chenard, IRflex Corporation (United States)
Oseas Alvarez, IRflex Corporation (United States)
Andrew Buff, IRflex Corporation (United States)

Published in SPIE Proceedings Vol. 10488:
Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XVIII
Israel Gannot, Editor(s)

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