Brillouin-based fiber-optic distributed temperature sensor with optical preamplification
Brillouin-based fiber-optic distributed temperature sensor with optical preamplification
Optical preamplification has been used in a fiber-optic distributed temperature sensor based on spontaneous Brillouin scattering and the use of direct detection, resulting in improved signal-to-noise ratios. The fiber-based optical preamplifier system comprises a three-port circulator, an erbium-doped fiber amplifier with a small-signal gain of 27dB, and a fiber Bragg grating with 47GHz bandwidth. An improvement of 17dB in the optical signal-to-noise ratio for the Brillouin signal is demonstrated in a 23km sensor. The limit to the signal-to-noise ratio is attributed to spontaneous beat noise generated at the photodetector by amplified spontaneous emission from the optical amplifier.
1331-1333
de Souza, K.
03fbf873-6edf-490a-b884-7c7c5dcb058e
Newson, Trevor
6735857e-d947-45ec-8163-54ebb25daad7
2000
de Souza, K.
03fbf873-6edf-490a-b884-7c7c5dcb058e
Newson, Trevor
6735857e-d947-45ec-8163-54ebb25daad7
de Souza, K. and Newson, Trevor
(2000)
Brillouin-based fiber-optic distributed temperature sensor with optical preamplification.
Optics Letters, 25 (18), .
(doi:10.1364/OL.25.001331).
Abstract
Optical preamplification has been used in a fiber-optic distributed temperature sensor based on spontaneous Brillouin scattering and the use of direct detection, resulting in improved signal-to-noise ratios. The fiber-based optical preamplifier system comprises a three-port circulator, an erbium-doped fiber amplifier with a small-signal gain of 27dB, and a fiber Bragg grating with 47GHz bandwidth. An improvement of 17dB in the optical signal-to-noise ratio for the Brillouin signal is demonstrated in a 23km sensor. The limit to the signal-to-noise ratio is attributed to spontaneous beat noise generated at the photodetector by amplified spontaneous emission from the optical amplifier.
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Published date: 2000
Organisations:
Optoelectronics Research Centre
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Local EPrints ID: 13613
URI: http://eprints.soton.ac.uk/id/eprint/13613
ISSN: 0146-9592
PURE UUID: 21b1ac59-a95e-4b09-873a-085c87faa3b3
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Date deposited: 31 Dec 2004
Last modified: 15 Mar 2024 05:08
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Author:
K. de Souza
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