Title :
γ-radiation-induced absorption in pure-silica-core fibers in the visible spectral region: the effect of H2-loading
Author :
Tomashuk, A.L. ; Dianov, E.M. ; Golant, K.M. ; Rybaltovskii, A.O.
Author_Institution :
Inst. of Gen. Phys., Acad. of Sci., Moscow, Russia
Abstract :
γ-radiation-induced absorption in the visible spectral region is studied in H2-loaded and untreated optical fibers with high-OH low-Cl KU core and low-OH low-Cl KS-4V core. H2-loading is found to suppress the low-dosage transient absorption band centered at 670 nm in KS-4V fibers. After irradiation to 1.7 MGy(Si), H2-loaded fibers show losses many times lower than the untreated fibers. H2-loaded and irradiated fibers are found to retain very high radiation resistance under subsequent irradiations even in the absence of molecular hydrogen. It is concluded that H2-loading followed by pre-irradiation can be used as an efficient radiation hardening technique for pure-silica optical fibers
Keywords :
defect absorption spectra; gamma-ray effects; optical fibres; radiation hardening; 1.7 MGy; 670 nm; H2; H2 loading; KS-4V core; KU core; SiO2; gamma radiation induced absorption; optical fiber; pure silica core fiber; radiation hardening; transient absorption; visible spectra; Electromagnetic wave absorption; Hydrogen; Impurities; Inspection; Nuclear physics; Optical fiber losses; Optical fibers; Plasma applications; Radiation hardening; Silicon compounds;
Conference_Titel :
Radiation and Its Effects on Components and Systems, 1997. RADECS 97. Fourth European Conference on
Conference_Location :
Cannes
Print_ISBN :
0-7803-4071-X
DOI :
10.1109/RADECS.1997.698977
