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research article
Stress changes in H2-loaded SMF optical fibers induced by cw-Ar+ 244 nm irradiation
Bragg gratings were inscribed in H2-loaded SMF-28e optical fibers and measured for axial stress changes for various exposure doses. Mean refractive index changes as high as 7.5 × 10-3 were observed under cw-244 nm irradiation of 143 W/cm2. Bragg grating reflectivity >99% was achieved for 0.7 mm long (1/e2) gratings. Axial stress measurements realized before and after UV exposure of the fibers, show two competing dose-dependent photosensitivity mechanisms: Negative stress changes at the early stages of exposure and positive stress changes for high exposures.
Type
research article
Web of Science ID
WOS:000310647500004
Authors
Publication date
2012
Publisher
Published in
Volume
2
Issue
11
Start page
1490
End page
1495
Subjects
Peer reviewed
REVIEWED
EPFL units
Available on Infoscience
September 12, 2012
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