Responses of a long-period grating fabricated in a graded-index optical fiber to temperature and refractive-index changes
Responses of a long-period grating fabricated in a graded-index optical fiber to temperature and refractive-index changes
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.
CO laser, Fiber-optic sensor, Long-period grating
457-461
Chomát, M.
73f0a9ca-de6f-411c-9bc2-f7528eab579b
Berková, D.
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Matějec, V.
dab0855a-f5e6-45a2-ad6e-a1564bc13a08
Kašík, I.
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Kaňka, J.
5a3ada06-2264-4dfe-ba12-8f2e3cbefaae
Slavík, R.
2591726a-ecc0-4d1a-8e1d-4d0fd8da8f7d
Jančárek, A.
c453c1ef-6c70-4fa5-9873-56ee96677602
Bittner, P.
9bfe1870-518d-4467-9a5c-2bfb55e9324a
March 2006
Chomát, M.
73f0a9ca-de6f-411c-9bc2-f7528eab579b
Berková, D.
c3bf4aff-0380-4784-9648-2afd7c8f0afb
Matějec, V.
dab0855a-f5e6-45a2-ad6e-a1564bc13a08
Kašík, I.
62ae9530-a54d-4685-a2c4-44f49ec558fc
Kaňka, J.
5a3ada06-2264-4dfe-ba12-8f2e3cbefaae
Slavík, R.
2591726a-ecc0-4d1a-8e1d-4d0fd8da8f7d
Jančárek, A.
c453c1ef-6c70-4fa5-9873-56ee96677602
Bittner, P.
9bfe1870-518d-4467-9a5c-2bfb55e9324a
Chomát, M., Berková, D., Matějec, V., Kašík, I., Kaňka, J., Slavík, R., Jančárek, A. and Bittner, P.
(2006)
Responses of a long-period grating fabricated in a graded-index optical fiber to temperature and refractive-index changes.
Materials Science and Engineering C, 26 (2-3), .
(doi:10.1016/j.msec.2005.10.024).
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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Published date: March 2006
Additional Information:
This research was supported by the Grant Agency of the Czech Republic (contract No. 102/03/0475).
Keywords:
CO laser, Fiber-optic sensor, Long-period grating
Identifiers
Local EPrints ID: 456628
URI: http://eprints.soton.ac.uk/id/eprint/456628
ISSN: 0928-4931
PURE UUID: f44be1ec-1b84-48c6-83fa-1cf19a2be985
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Date deposited: 05 May 2022 16:59
Last modified: 18 Mar 2024 03:12
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Contributors
Author:
M. Chomát
Author:
D. Berková
Author:
V. Matějec
Author:
I. Kašík
Author:
J. Kaňka
Author:
A. Jančárek
Author:
P. Bittner
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