Bending Properties Of Large Core Optical Fibers Used For Medical Therapy

Sadao Chigira; Tateyuki Oohashi; Kazuo Sanada; Koichi Inada

doi:10.1117/12.952125

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15 June 1989 Bending Properties Of Large Core Optical Fibers Used For Medical Therapy

Sadao Chigira, Tateyuki Oohashi, Kazuo Sanada, Koichi Inada

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Proceedings Volume 1067, Optical Fibers in Medicine IV; (1989) https://doi.org/10.1117/12.952125
Event: OE/LASE '89, 1989, Los Angeles, CA, United States

Abstract

Transmission characteristics of silica based large core fibers ( SLF ) have been investigated. Concerning with the spectral loss in ultra violet region, a pure silica core and B,F doped silica cladding fiber showed the lowest value approximately 3 dB/m at 200 nm wavelength. It has been clarified that the bending loss of SLF strongly depends on the Numerical Aperture and core diameter. It has been found that excess loss due to bending has the methodical relations with core diameter and bending diameter. On the other hand, a fiber was fractured by about 20 times of its diameter. As a result, it has been clarified that large NA fiber has the advantage in laser surgery. This paper describes the details of the transmission characteristics and the mechanical reliability of SLF for medical usage.

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Sadao Chigira, Tateyuki Oohashi, Kazuo Sanada, and Koichi Inada "Bending Properties Of Large Core Optical Fibers Used For Medical Therapy", Proc. SPIE 1067, Optical Fibers in Medicine IV, (15 June 1989); https://doi.org/10.1117/12.952125

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