Fiber-guided tunable UV-laserlight system around 215 nm

Karl-Friedrich Klein; Stefan Huettel; H. Georg Schulze; L. Shane Greek; Michael W. Blades; Charles A. Haynes; Robin F. B. Turner

doi:10.1117/12.271012

18 April 1997 Fiber-guided tunable UV-laserlight system around 215 nm

Karl-Friedrich Klein, Stefan Huettel, H. Georg Schulze, L. Shane Greek, Michael W. Blades, Charles A. Haynes, Robin F. B. Turner

Author Affiliations +

Proceedings Volume 2977, Specialty Fiber Optics for Biomedical and Industrial Applications; (1997) https://doi.org/10.1117/12.271012
Event: BiOS '97, Part of Photonics West, 1997, San Jose, CA, United States

Abstract

Silica based optical fibers are in operation for light- guidance in many applications, with wavelengths ranging from 230 nm to 2.2 micrometer. At shorter wavelengths, UV- improved fibers (UVI) can be used, which overcome the significant generation of UV-defects and associated loss in throughput using broadband deuterium-lamps or UV-lasers with fixed wavelengths such as excimer-lasers and quadrupled Nd:YAG lasers. Alternatively, many spectroscopic applications need a tunable and powerful UV-light to carry out remote-measurements, in-situ. In addition, specialized fiber-optics probe may be useful. We report for the first time on the transmission properties of the UVI-fibers with high-power pulsed lasers with wavelengths in the vicinity of the dominant UV-defect at 215 nm using a frequency-doubled dye-laser, tunable from 206 to 245 nm. Due to the high intensity of this pulsed laser system, especially near the fiber frontface, two-photon absorption plays a major role with decreasing wavelength. Therefore, properties such as starting transmission and UV-induced loss were measured as a function of the wavelength and input pulse energy. The envelope of the wavelength-dependent induced losses is comparable with results taken from tests with low-power broadband deuterium-lamps. However, the temporal behavior during recovery is quite different.

Citation Download Citation

Karl-Friedrich Klein, Stefan Huettel, H. Georg Schulze, L. Shane Greek, Michael W. Blades, Charles A. Haynes, and Robin F. B. Turner "Fiber-guided tunable UV-laserlight system around 215 nm", Proc. SPIE 2977, Specialty Fiber Optics for Biomedical and Industrial Applications, (18 April 1997); https://doi.org/10.1117/12.271012

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