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18 April 1997 Liquid-core fused silica capillary lightguides for applications in the UV/VIS and NIR spectral range
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Proceedings Volume 2977, Specialty Fiber Optics for Biomedical and Industrial Applications; (1997) https://doi.org/10.1117/12.271019
Event: BiOS '97, Part of Photonics West, 1997, San Jose, CA, United States
Abstract
Fused silica capillaries proved to be a suitable cladding material for liquid core lightguides. They have small diameters, a good mechanical stability and a high flexibility. Due to these properties such lightguides can be used for applications in minimally invasive surgery for endoscopical treatments. Filled with carbontetrachloride (CCl4), the optical properties were investigated spectrometrically and with various lasers. The transmission measurements of straight and 180 degree bent fibers were performed with a free-running Er:YAG, Er:YSGG, Ho:YAG, and Nd:YAG laser. Due to an overlap of the refractive indices of CCl4 and fused silica between 500 nm and 1 micrometer, laser wavelengths in this spectral range, e.g., of the Nd:YAG and the HeNe laser, cannot be transmitted in this lightguide. If the core liquid is a mixture of CCl4 and tetrachloroethylene (C2Cl4) the lightguide is transparent from the near UV (380 nm) up to the NIR (3 micrometer) and consequently, it is suitable also for the Nd:YAG laser. With the CCl4-filled fused silica capillaries distal energy densities up to 30 J/cm2 were achieved and thus the ablation threshold of soft tissue is exceeded.
© (1997) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
Joerg Meister, Stefan Diemer, Roland Jung, Sandra Klein, Werner Fuss, and Peter Hering "Liquid-core fused silica capillary lightguides for applications in the UV/VIS and NIR spectral range", Proc. SPIE 2977, Specialty Fiber Optics for Biomedical and Industrial Applications, (18 April 1997); https://doi.org/10.1117/12.271019
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