Title :
Optical fibres for high radiation dose environments
Author :
Henschel, H. ; Köhn, O. ; Schmidt, H.U. ; Bawirzanski, E. ; Landers, A.
Author_Institution :
Fraunhofer-INT, Euskirchen, Germany
fDate :
6/1/1994 12:00:00 AM
Abstract :
A variety of modern single mode (SM) and graded index (GI) fibres as well as a new pure silica multimode step index (MMSI) fibre with high OH content were irradiated at a 60Co gamma ray source with a dose rate of ≈1.5 Gy/s up to a total dose of 106 Gy. The radiation-induced loss of all fibres was measured continuously during and after irradiation at discrete wave lengths (≈850, ≈1070, ≈1300, ≈1550 nm). With one SM fibre type also the “breaking stress” before and after irradiation was determined. Radiation-induced losses of ≲5 dB/50m (at ≈1300 nm) were found with some of the SM fibres, whereas the MMSI fibre showed a final induced loss of only 0.5 dB/50m at 1070 nm wavelength. The breaking stress of the SM fibre increased by about 10%
Keywords :
fracture toughness; gamma-ray effects; gradient index optics; optical fibres; optical losses; 10E6 Gy; 850 to 1550 nm; 60Co gamma rays; breaking stress; gamma ray irradiation; graded index fibres; high OH content; multimode step index fibre; radiation-induced loss; single mode fibres; Modems; Optical fiber communication; Optical fiber losses; Optical fiber testing; Optical fibers; Samarium; Silicon compounds; Space heating; Stress; Ultraviolet sources;
Journal_Title :
Nuclear Science, IEEE Transactions on
