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Proceedings Paper

High-power stability of optical fibers for the visible wavelength region
Author(s): Johannes Kirchhof; Sonja Unger; Siegmund Schroeter; Anka Schwuchow; Holger Frost; Christhard Deter
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Paper Abstract

It is not generally known that light in the visible region can produce a time-dependent damage of optical fibers. For application in a novel laser projection system, fibers with silica core and fluorine doped cladding were fabricated by MCVD technique. The transmission behavior in the visible and ultraviolet spectral region was investigated. Modifications of the preparation process comprised the deposition and collapsing under reducing or oxidizing conditions to influence oxygen deficiencies and chlorine content, the treatment with water vapor and hydrogen, and the deposition of the core with small amounts of dopants as germanium. The complex diffusion and reaction behavior of hydrogen was studied and described by temperature- and concentration- dependent diffusion coefficients. All these modifications correlate with specific variations of the loss spectrum and with the fiber lifetime under blue light illumination at 446 nm wavelength with a mean power of 1 Watt corresponding to an intensity of about 0.6 MW/cm2. In the result, an increase of the power stability of the fiber and a prolongation of the lifetime by a factor of about 20 could be achieved by carefully tailored preform treatments.

Paper Details

Date Published: 19 October 2001
PDF: 12 pages
Proc. SPIE 4579, Optical Fiber and Planar Waveguide Technology, (19 October 2001); doi: 10.1117/12.444913
Show Author Affiliations
Johannes Kirchhof, Institut fuer Physikalische Hochtechnologie eV Jena (Germany)
Sonja Unger, Institut fuer Physikalische Hochtechnologie eV Jena (Germany)
Siegmund Schroeter, Institut fuer Physikalische Hochtechnologie eV Jena (Germany)
Anka Schwuchow, Institut fuer Physikalische Hochtechnologie eV Jena (Germany)
Holger Frost, Schneider Laser Technologies AG (Germany)
Christhard Deter, Schneider Laser Technologies AG (Germany)

Published in SPIE Proceedings Vol. 4579:
Optical Fiber and Planar Waveguide Technology
Shuisheng Jian; Yanming Liu, Editor(s)

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