Improvement of radiation resistance of pure silica core fibers by hydrogen treatment

Kaya Nagasawa, Yutaka Hoshi, Yoshimichi Ohki, Kichinosuke Yahagi

Research output: Contribution to journalArticlepeer-review

51 Citations (Scopus)


A pure silica core fiber with glass cladding is known to produce larger absorption in the visible wavelength region under γ-ray irradiation than a similar fiber with silicone cladding. This absorption is a serious problem, especially in image-guiding fibers used in radiation environments such as in nuclear power plants. The absorption is attributed to the formation of defect centers such as non-bridging oxygen hole centers and E' centers induced by bond scission. A new and simple method of hydrogen treatment to improve the radiation resistance of an optical fiber with a pure silica core has been proposed. Post-treatment by this method can significantly reduce existing radiation-induced absorption, while preliminary treatment can suppress the increase of the radiation-induced absorption.

Original languageEnglish
Pages (from-to)1224-1228
Number of pages5
JournalJapanese journal of applied physics
Issue number9R
Publication statusPublished - 1985 Sept 1

ASJC Scopus subject areas

  • Engineering(all)
  • Physics and Astronomy(all)


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