A germano-silicate glass optical fiber with inner cladding layers of pure silica buffer and boron-doped silica was fabricated to enhance photosensitivity of fiber Bragg grating (FBG) maintaining the radiation resistance for sensing applications. The gamma-ray dose-rate dependence on the radiation-induced attenuation (RIA) and the peak shift of the FBG inscribed in the core of the fiber was investigated. As the γ-ray irradiation on the fiber with the FBG increased to 22.86 kGy/h, the reflected peak power increased together with small temperature increase but the transmitted power at 1550 nm decreased. While the Bragg reflection wavelengths were shifted toward longer wavelengths during the γ-ray irradiation, the FWHM bandwidth remained unchanged. The Bragg peak shift of the FBG was found to saturate at a 78 pm level and the RIA of 1.345 dB/m at 1550 nm was obtained with the accumulated dose-rate of 22.86 kGy/h.
CITATION STYLE
Ju, S., Kim, Y., Jeong, S., Kim, J. Y., Lee, N. H., Jung, H. K., & Han, W. T. (2016). Gamma-ray dose-rate dependence on radiation resistance of specialty optical fiber with inner cladding layers. In Springer Proceedings in Physics (Vol. 177, pp. 51–65). Springer Science and Business Media, LLC. https://doi.org/10.1007/978-3-319-27321-1_5
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