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Photoinduced processes in Sn-doped silica fiber-preforms

Photoinduced processes in Sn-doped silica fiber-preforms
Photoinduced processes in Sn-doped silica fiber-preforms
Effects induced by KrF ultraviolet excimer laser on Sn-doped silica fiber performs were analyzed by means of optical and electron paramagnetic resonance (EPR) techniques. Bond breaking in substitutional Sn sites was evidenced by the Sn–E EPR signal due to sp3 unpaired electrons in threefold coordinated Sn sites. Red photoluminescence excited at 633 nm, due to nonbridging-oxygen sites, was also observed after laser exposure. The intensity of this emission did not follow the Sn concentration profile, being observed at the core–cladding interface and in the core center. Birefringence data showed that these effects are accompanied by stress relief in the Sn-doped region. Different structural features of core and cladding were evidenced by micro-Raman measurements and related to the observed photosensitivity.
0003-6951
3701-3703
Chiodini, N.
d516f93d-7d8e-4033-b1be-b33ad58bf4f6
Ghidini, S.
f2b840b8-0476-4345-905b-51810f979fa9
Paleari, A.
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Brambilla, G.
815d9712-62c7-47d1-8860-9451a363a6c8
Pruneri, V.
0e97eb94-b682-409f-a107-ae6b84763f02
Chiodini, N.
d516f93d-7d8e-4033-b1be-b33ad58bf4f6
Ghidini, S.
f2b840b8-0476-4345-905b-51810f979fa9
Paleari, A.
8f5681e9-6393-4a6a-b346-3905b72e9dbd
Brambilla, G.
815d9712-62c7-47d1-8860-9451a363a6c8
Pruneri, V.
0e97eb94-b682-409f-a107-ae6b84763f02

Chiodini, N., Ghidini, S., Paleari, A., Brambilla, G. and Pruneri, V. (2000) Photoinduced processes in Sn-doped silica fiber-preforms. Applied Physics Letters, 77 (23), 3701-3703. (doi:10.1063/1.1330749).

Record type: Article

Abstract

Effects induced by KrF ultraviolet excimer laser on Sn-doped silica fiber performs were analyzed by means of optical and electron paramagnetic resonance (EPR) techniques. Bond breaking in substitutional Sn sites was evidenced by the Sn–E EPR signal due to sp3 unpaired electrons in threefold coordinated Sn sites. Red photoluminescence excited at 633 nm, due to nonbridging-oxygen sites, was also observed after laser exposure. The intensity of this emission did not follow the Sn concentration profile, being observed at the core–cladding interface and in the core center. Birefringence data showed that these effects are accompanied by stress relief in the Sn-doped region. Different structural features of core and cladding were evidenced by micro-Raman measurements and related to the observed photosensitivity.

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Published date: 2000

Identifiers

Local EPrints ID: 13619
URI: https://eprints.soton.ac.uk/id/eprint/13619
ISSN: 0003-6951
PURE UUID: 44ac01b7-180f-4884-82cd-b64f984ca808

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Date deposited: 01 Jan 2005
Last modified: 17 Jul 2017 17:01

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