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Radiation-induced optical fibre loss in the far IR

 
: Henschel, H.; Köhn, O.

:
Postprint urn:nbn:de:0011-n-41119 (484 KByte PDF)
MD5 Fingerprint: 0060dd2a57f5788181654f6574023296
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Erstellt am: 25.9.2010


Sharp, R.:
Fifth European Conference on Radiation and Its Effects on Components and Systems, RADECS '99
Piscataway, NJ: IEEE, 2000
ISBN: 0-7803-5726-4
S.466-470
European Conference on Radiation and its Effects on Components and Systems (RADECS) <5, 1999, Abbaye de Fontevraud>
Englisch
Konferenzbeitrag, Elektronische Publikation
Fraunhofer INT ()
gamma-ray effect; gradient index optics; optical fibre loss; optical saturable absorption; far IR absorption loss; Ge-doped graded index fibre; gamma irradiation; single mode fibre; optical fibre; photobleaching; 830 nm; 1300 nm; 1550 nm; 10 muW

Abstract
It was observed that the loss of a Ge-doped graded index (GI) fibre during gamma irradiation grows stronger at a longer wavelength (about 1300 nm) than at a shorter one (830 nm). The same is known from Ge-doped and undoped single mode (SM) fibres at about 1550 and 1300 nm. During longer irradiations (or=10 muW). The stronger loss increase at 1550 nm of a Ge-doped SM fibre continued for more than 70 days, leading to an about 1.5 times higher loss at 1550 nm than at 1300 nm. The reason seems to be an long-lived absorption peak in the far IR.

: http://publica.fraunhofer.de/dokumente/N-4111.html