Liquid-core fused silica capillary lightguides for applications in the UV/VIS and NIR spectral range

Joerg Meister; Stefan Diemer; Roland Jung; Sandra Klein; Werner Fuss; Peter Hering

doi:10.1117/12.271019

18 April 1997 Liquid-core fused silica capillary lightguides for applications in the UV/VIS and NIR spectral range

Joerg Meister, Stefan Diemer, Roland Jung, Sandra Klein, Werner Fuss, Peter Hering

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.

Citation Download Citation

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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