Transmission behavior of silica core: fluorine-doped cladding fibers in the visible and ultraviolet region

Sonja Unger; Johannes Kirchhof; Siegmund Schroeter; Anka Schwuchow; Holger Frost

doi:10.1117/12.463809

26 March 2002 Transmission behavior of silica core: fluorine-doped cladding fibers in the visible and ultraviolet region

Sonja Unger, Johannes Kirchhof, Siegmund Schroeter, Anka Schwuchow, Holger Frost

Author Affiliations +

Proceedings Volume 4616, Optical Fibers and Sensors for Medical Applications II; (2002) https://doi.org/10.1117/12.463809
Event: International Symposium on Biomedical Optics, 2002, San Jose, CA, United States

Abstract

Pure silica core fibers with a high OH content are believed to be the best fiber type for the visible and ultaviolet region concerning low attenuation and high power stability. Here we present systematic investigations of silica core - fluorine doped cladding fibers made by MCVD, where the composition of the fiber core was slightly modified by doping with germanium, phosphorus, boron, aluminium, and fluorine at a low level of typically 0.5 mol%. Moreover, the influence of hydrogen treatment was studied. The attenuation level in the visible region, the defect band at 330 nm and the oxygen deficiency bands around 250 nm could be correlated with the preform modifications in a systematic manner. Interaction mechanisms between the defect bands and with the OH groups are discussed. The stability of the fiber against high power blue light in the Watt range was investigated. By suitably modified fibers, stability times could be realized much longer than in conventional high OH fibers.

Citation Download Citation

Sonja Unger, Johannes Kirchhof, Siegmund Schroeter, Anka Schwuchow, and Holger Frost "Transmission behavior of silica core: fluorine-doped cladding fibers in the visible and ultraviolet region", Proc. SPIE 4616, Optical Fibers and Sensors for Medical Applications II, (26 March 2002); https://doi.org/10.1117/12.463809

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