Fraunhofer-Gesellschaft

Publica

Hier finden Sie wissenschaftliche Publikationen aus den Fraunhofer-Instituten.

Regeneration of irradiated optical fibres by photobleaching?

 
: Henschel, H.; Köhn, O.

:
Postprint urn:nbn:de:0011-n-41143 (429 KByte PDF)
MD5 Fingerprint: 7979d055219b3ccf41a533c198d1293d
© 2000 IEEE. Personal use of this material is permitted. However, permission to reprint/republish this material for advertising or promotional purposes or for creating new collective works for resale or redistribution to servers or lists, or to reuse any copyrighted component of this work in other works must be obtained from the IEEE.
Erstellt am: 25.9.2010


IEEE Transactions on Nuclear Science 47 (2000), Nr.3, S.699-704
ISSN: 0018-9499
Englisch
Zeitschriftenaufsatz, Elektronische Publikation
Fraunhofer INT ()
gamma-ray effect; optical fibre loss; optical saturable absorption; gamma irradiation; optical fibre regeneration; photobleaching; nuclear reactor; particle accelerator; radiation induced loss; laser light injection; silica core fibre; Ge-doped fibre

Abstract
Optical fibres that are permanently installed in nuclear reactors (fission or fusion) or at high energy physics accelerators can accumulate considerable long-lived radiation-induced loss. Four different fibre types were irradiated up to dose values from 10/sup 3/ to 10/sup 6/ Gy and an attempt was made to reduce the residual loss >or=28 h after the end of irradiation by injection of high intensity laser light (40-100 mW) of 672, 830 and 980 nm wavelength. The radiation-induced loss of undoped silica core fibres could not be reduced by photobleaching, whereas the loss of Ge-doped fibres could only be reduced after lower dose values and in the wavelength region of lowest loss increase (800-1200 nm) where it is tolerable anyhow.

: http://publica.fraunhofer.de/dokumente/N-4114.html