Formation of drawing-induced E' centers in silica optical fibers

Using an electron spin resonance technique, E' centers have been observed in pure silica optical fibers fabricated under various drawing conditions. The E'-center concentration increases with increasing furnace temperature and drawing velocity. The influences of the temperature and velocit...

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Published in:Japanese Journal of Applied Physics 1985-09, Vol.24 (9), p.1117-1121
Main Authors: HIBINO, Y, HANAFUSA, H, SAKAGUCHI, S
Format: Article
Language:English
Subjects:
Applied sciences
Circuit properties
Electric, optical and optoelectronic circuits
Electronics
Exact sciences and technology
Integrated optics. Optical fibers and wave guides
Optical and optoelectronic circuits
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description Using an electron spin resonance technique, E' centers have been observed in pure silica optical fibers fabricated under various drawing conditions. The E'-center concentration increases with increasing furnace temperature and drawing velocity. The influences of the temperature and velocity have been studied by considering the diameter and temperature distributions of a preform in the drawing furnace. The analysis indicates that the E' centers are frozen in the optical fibers by a thermal activation process in the furnace. The activation energy for the creation of the E' centers is determined as 3.5±0.5 eV, and the effective recombination density for the decay of the E' center as 6.2×10 -13 . Furthermore, the fictive temperature of the optical fibers is estimated to be more than 2100 K from the E'-center concentration.
doi_str_mv 10.1143/jjap.24.1117
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source Institute of Physics IOPscience extra; Institute of Physics:Jisc Collections:IOP Publishing Read and Publish 2024-2025 (Reading List)
subjects Applied sciences
Circuit properties
Electric, optical and optoelectronic circuits
Electronics
Exact sciences and technology
Integrated optics. Optical fibers and wave guides
Optical and optoelectronic circuits
title Formation of drawing-induced E' centers in silica optical fibers
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