Narrow linewidth, high power Q-switched erbium doped fibre laser
Narrow linewidth, high power Q-switched erbium doped fibre laser
For distributed temperature sensing based on Brillouin scattering, narrow linewidth pulsed sources required to spectrally resolve the Rayleigh and Brillouin backcattered radiation. The temperature is determined by the relative intensity of the Rayleigh and Brillouin backscattered light i.e. the Landau-Placek ratio. Typically the backscattered Brillouin is separated from the Rayleigh by about 10 GHz. A Q-switched fibre laser using a narrowband in-fibre Bragg grating as an output coupler ensures the Q-switched laser operates with a narrow linewidth, whilst the Q-switched operation produces the high power pulses necessary to produce a strong back-scattered Brillouin signal. Figure 1 shows the optical arrangement used for the Q-switched laser.
Lees, G.P.
0c1c9d69-debd-4e3c-a159-b3463564ca2e
Cole, M.J.
10f9ce86-9ed0-4e4f-9da8-8b85161669b3
Newson, T.P.
6735857e-d947-45ec-8163-54ebb25daad7
8 September 1996
Lees, G.P.
0c1c9d69-debd-4e3c-a159-b3463564ca2e
Cole, M.J.
10f9ce86-9ed0-4e4f-9da8-8b85161669b3
Newson, T.P.
6735857e-d947-45ec-8163-54ebb25daad7
Lees, G.P., Cole, M.J. and Newson, T.P.
(1996)
Narrow linewidth, high power Q-switched erbium doped fibre laser.
Conference on Lasers and Electro-Optics (CLEO Europe), Hamburg, Hamburg, Germany.
08 - 13 Sep 1996.
Record type:
Conference or Workshop Item
(Paper)
Abstract
For distributed temperature sensing based on Brillouin scattering, narrow linewidth pulsed sources required to spectrally resolve the Rayleigh and Brillouin backcattered radiation. The temperature is determined by the relative intensity of the Rayleigh and Brillouin backscattered light i.e. the Landau-Placek ratio. Typically the backscattered Brillouin is separated from the Rayleigh by about 10 GHz. A Q-switched fibre laser using a narrowband in-fibre Bragg grating as an output coupler ensures the Q-switched laser operates with a narrow linewidth, whilst the Q-switched operation produces the high power pulses necessary to produce a strong back-scattered Brillouin signal. Figure 1 shows the optical arrangement used for the Q-switched laser.
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1307
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Published date: 8 September 1996
Venue - Dates:
Conference on Lasers and Electro-Optics (CLEO Europe), Hamburg, Hamburg, Germany, 1996-09-08 - 1996-09-13
Identifiers
Local EPrints ID: 76853
URI: http://eprints.soton.ac.uk/id/eprint/76853
PURE UUID: 3958bf15-9573-4ccb-b718-429554478732
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Date deposited: 11 Mar 2010
Last modified: 13 Mar 2024 23:38
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Contributors
Author:
G.P. Lees
Author:
M.J. Cole
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