Mid-infrared chalcogenide fiber devices for medical applications

Francois Chenard; Oseas Alvarez; Andrew Buff

doi:10.1117/12.2287860

13 February 2018 Mid-infrared chalcogenide fiber devices for medical applications

Francois Chenard, Oseas Alvarez, Andrew Buff

Proceedings Volume 10488, Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XVIII; 104880S (2018) https://doi.org/10.1117/12.2287860
Event: SPIE BiOS, 2018, San Francisco, California, United States

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.

Conference Presentation

Citation Download Citation

Francois Chenard, Oseas Alvarez, and Andrew Buff "Mid-infrared chalcogenide fiber devices for medical applications", Proc. SPIE 10488, Optical Fibers and Sensors for Medical Diagnostics and Treatment Applications XVIII, 104880S (13 February 2018); https://doi.org/10.1117/12.2287860

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