Gamma Irradiation Characteristics of Optical Fibers
SHOWA ELECTRIC WIRE AND CABLE CO SAGAMIHARA (JAPAN)
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The characteristics of optical fibers during 60 Co gamma irradiation, i.e. the effect of dopant, OH content, dose rate and temperature were investigated. Moreover, the model which presumes the effect of long term use from the result of short term irradiation was investigated. The range of environment and a type of fiber which could be used for a long time was decided. From experimental results, it became clear that the fiber which could be used in radiation exposed area was only pure silica core fiber. Moreover, the increase of transmission loss of pure silica core fiber was able to be explained from the model of color center formation by irradiation and from the dose rate dependence. The increase of transmission loss of pure silica core fiber used for a long time was presumed quantitatively.
- Fiber Optics and Integrated Optics