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Radiation sensitivity of passive components of fibre optic data transfer and sensor systems

: Henschel, H.; Köhn, O.; Schmidt, H.U.

Postprint urn:nbn:de:0011-px-307366 (264 KByte PDF)
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Copyright 1994 Society of Photo-Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.
Created on: 25.9.2010

Society of Photo-Optical Instrumentation Engineers -SPIE-, Bellingham/Wash.:
Symposium on Optical Fibre Sensing und Systems in Nuclear Environments : 17-18 October 1994, Mol, Belgium
Bellingham, WA: SPIE, 1994 (Proceedings of SPIE 2425)
ISBN: 0-8194-1773-4
ISSN: 0277-786X
Symposium on Optical Fibre Sensing und Systems in Nuclear Environments <1994, Mol>
Conference Paper, Electronic Publication
Fraunhofer INT ()
fibre connectors; fibre couplers; gamma irradiation; lens connectors; optical glues; radiation effect; wavelength multiplexers

Test results of residual passive components of fibre optic systems (apart from optical fibres), 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 of about 0.2 Gy/s up to a final dose of 100 (integrated optic devices) or 10E4 Gy (fibre optic components). Direct connectors can contribute < about 0.3 dB to the total loss (10E4 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 fibres, lambda=865 nm) and about 50 dB (coupler made of GRIN lenses, lambda=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 (10E4 Gy). Optical glues of 0.02 to 0.04 mm thickness showe d noticeable loss increase only for wavelenghts < about 500 nm (10E4 and 10E5 Gy).