Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
1430780 | Materials Science and Engineering: C | 2006 | 5 Pages |
Abstract
Sensing experiments with a long-period grating (LPG) inscribed by a CO2 laser in a single-mode fiber with an inverted-parabolic index profile in the fiber cladding were done. A single LPG with a period of 500 μm was used in experiments and spectral changes of the attenuation band centered at ≈1520 nm were measured. Responses of the LPG to temperature changes and temperature-induced refractive-index changes were investigated. An average shift of 0.56 nm/°C was obtained for the bare LPG and of 0.86 nm/°C for the LPG recoated with a polymeric layer. An overall shift of the central wavelengths was observed in experiments repeated after two weeks that can be attributed to post-curing processes in the polymeric layer.
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Authors
M. Chomát, D. Berková, V. Matějec, I. Kašík, J. Kaňka, R. Slavík, A. Jančárek, P. Bittner,