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Proceedings Paper

Radiation sensitivity of passive components of fibre optic data transfer and sensor systems
Author(s): Henning Henschel; Otmar Koehn; Hans Ulrich Schmidt
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Paper Abstract

Test results of residual passive components of fiber optic systems (apart from optical fibers), such as connectors, couplers, wavelength division multiplexers (WDMs), and optical glues are presented. Most of the components were only irradiated at a 60Co gamma ray source with a dose rate of about 0.2 Gy/s up to a final dose of 100 (integrated optic devices) or 104 Gy (fiber optic components). Direct connectors can contribute <EQ 0.3 dB to the total loss (104 Gy), compared with 0.3 to 0.6 dB for lens connectors. The measured coupler inherent losses were between about 0.01 dB (fused coupler, high OH multimode stepindex fibers, (lambda) equals 865 nm) and about 50 dB (coupler made of GRIN lenses, (lambda) equals 865 nm). Fused WDMs showed negligible loss increase at the high power outputs and an increase of output power of up to several dB at the isolating output, as well as shifts of the isolating and throughput regions between about 5 and 14 nm (104 Gy). Optical glues of 20 to 40 micrometers thickness showed noticeable loss increase only for wavelengths <EQ 500 nm (104 and 105 Gy).

Paper Details

Date Published: 30 December 1994
PDF: 8 pages
Proc. SPIE 2425, Optical Fibre Sensing and Systems in Nuclear Environments, (30 December 1994); doi: 10.1117/12.198637
Show Author Affiliations
Henning Henschel, Fraunhofer-Institut fuer Naturwissenschaftlich-Technische Trendanalyen (Germany)
Otmar Koehn, Fraunhofer-Institut fuer Naturwissenschaftlich-Technische Trendanalyen (Germany)
Hans Ulrich Schmidt, Fraunhofer-Institut fuer Naturwissenschaftlich-Technische Trendanalyen (Germany)

Published in SPIE Proceedings Vol. 2425:
Optical Fibre Sensing and Systems in Nuclear Environments
Roger Van Geen; Francis Berghmans; Marc C. Decreton, Editor(s)

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