Stability and lifetime improvements of UV fibers for new applications

Karl-Friedrich Klein; Stefan Huettel; Ralf Kaminski; Johannes Kirchhof; Stephan Grimm; Gary W. Nelson

doi:10.1117/12.309468

5 June 1998 Stability and lifetime improvements of UV fibers for new applications

Karl-Friedrich Klein, Stefan Huettel, Ralf Kaminski, Johannes Kirchhof, Stephan Grimm, Gary W. Nelson

Proceedings Volume 3262, Surgical-Assist Systems; (1998) https://doi.org/10.1117/12.309468
Event: BiOS '98 International Biomedical Optics Symposium, 1998, San Jose, CA, United States

Abstract

Two years ago, UV-improved (UVI) fibers were described for the first time. These fibers show significantly reduced UV- absorption around 215 nm during the transmission of UV-light from different UV-sources like deuterium-lamps, excimer- lasers and frequency-doubled tunable dye lasers. This improvement has been realized due to a passivation of the generated UV-defects by gas-doping. Depending on the ambient temperature and the fiber diameter, the lifetime of UV- stability was quite different in these first generation UVI- fibers. This long-term behavior has been studied with different illuminations, temperatures and fiber diameters; there is a good agreement between experimental and theoretical data. Additional modifications have lead to a further improvement in the long-term stability. The predicted lifetime of these UVI²-fibers of the second generation at room temperature is longer than 1 year. In addition, a short-term behavior was observed using diode- array spectrometer. In this case, the influence of temperature on the transient induced losses is significant and will be described.

Citation Download Citation

Karl-Friedrich Klein, Stefan Huettel, Ralf Kaminski, Johannes Kirchhof, Stephan Grimm, and Gary W. Nelson "Stability and lifetime improvements of UV fibers for new applications", Proc. SPIE 3262, Surgical-Assist Systems, (5 June 1998); https://doi.org/10.1117/12.309468

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