Improvement of optical damage in specialty fiber at 266 nm wavelength

Tobisch, T.; Ohlmeyer, H.; Zimmermann, Horst; Prein, S.; Kirchhof, J.; Unger, Sonja; Belz, Mathias; Klein, Karl-Friedrich

doi:10.1117/12.2041798

Cited by 3 publications

(1 citation statement)

References 21 publications

(48 reference statements)

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“…However, recently, special glass material processing techniques, such as the use of pure silica fibers with a low water concentration, infusion of hydrogen into the silica core, or fluorine doping of the cladding, have resulted in fibers that exhibit lower UV sensitivity below 260 nm. [27][28][29] When these types of fibers are exposed to UV light, the attenuation first increases rapidly and then stabilizes to an asymptotic value. The exact asymptotic value and the time to reach the plateau depend on the fiber type from specific manufacturers and on the UV wavelength.…”

Section: Fibers Resistant To Uv-induced Darkeningmentioning

confidence: 99%

Review of diverse optical fibers used in biomedical research and clinical practice

et al. 2014

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Abstract. Optical fiber technology has significantly bolstered the growth of photonics applications in basic life sciences research and in biomedical diagnosis, therapy, monitoring, and surgery. The unique operational characteristics of diverse fibers have been exploited to realize advanced biomedical functions in areas such as illumination, imaging, minimally invasive surgery, tissue ablation, biological sensing, and tissue diagnosis. This review paper provides the necessary background to understand how optical fibers function, to describe the various categories of available fibers, and to illustrate how specific fibers are used for selected biomedical photonics applications. Research articles and vendor data sheets were consulted to describe the operational characteristics of conventional and specialty multimode and single-mode solid-core fibers, double-clad fibers, hard-clad silica fibers, conventional hollow-core fibers, photonic crystal fibers, polymer optical fibers, side-emitting and side-firing fibers, middle-infrared fibers, and optical fiber bundles. Representative applications from the recent literature illustrate how various fibers can be utilized in a wide range of biomedical disciplines. In addition to helping researchers refine current experimental setups, the material in this review paper will help conceptualize and develop emerging optical fiber-based diagnostic and analysis tools.

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Section: Fibers Resistant To Uv-induced Darkeningmentioning

confidence: 99%

Review of diverse optical fibers used in biomedical research and clinical practice

et al. 2014

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Optical Fibers for Biophotonics Applications

Keiser

2016

Graduate Texts in Physics

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UV-fibers: two decades of improvements for new applications

Klein

Khalilov²

2015

SPIE Proceedings

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Multimode UV-fibers with high-OH synthetic silica core and F-doped silica cladding have been available for over 40 years. At the beginning, the spectral UV-range above 250 nm wavelength was commonly used, because the generation of UV-absorbing defect centers prevented reliable light transfer below 250 nm; even light from a low-power broadband deuterium-lamp was sufficient to damage these UV-fibers of the 1 st generation. However, even then, applications in the field of spectroscopy, laser light delivery, sensors and process control were discussed and improvements of fiber quality in this very interesting UVC range required by researchers and industrical end-users. Starting in 1993 with hydrogen-loaded fibers, further modification in preform and fiber manufacturing including additional fiber treatments lead to currently available hydrogen-free UV-fiber (4 th generation) with significantly improved stability in the DUV-region below 250 nm, enabling routine use of optical fibers in this field. In addition to the UV-fiber improvements, some selected UV fiber-optic applications using broadband deuterium-lamps will be discussed. Finally, there is still room for further improvements, especially in combination with newly available pulsed UV light sources, which are low-cost, small sized and highly reliable.

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Improvement of optical damage in specialty fiber at 266 nm wavelength

Cited by 3 publications

References 21 publications

Review of diverse optical fibers used in biomedical research and clinical practice

Review of diverse optical fibers used in biomedical research and clinical practice

Optical Fibers for Biophotonics Applications

UV-fibers: two decades of improvements for new applications

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