A Stabilized Fiber Laser for High-Resolution Low-Frequency Strain Sensing

We frequency stabilize a fiber laser for use in low-frequency sensing applications. Using a radio frequency locking technique, an Erbium-doped single longitudinal mode fiber laser is stabilized to a Mach-Zehnder interferometer. The low-frequency fiber laser noise was suppressed by more than 1.5 orde...

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Bibliographic Details
Published in:IEEE sensors journal 2009-08, Vol.9 (8), p.983-986
Main Authors: Lam, T.T.-Y., Chow, J.H., Mow-Lowry, C.M., McClelland, D.E., Littler, I.C.M.
Format: Article
Language:English
Subjects:
Capacitive sensors
Detection
Erbium-doped fiber lasers
Fiber lasers
frequency locked loops
frequency stability
Laser noise
Laser stability
laser stabilization
Locking
Low-frequency noise
Mach-Zehnder interferometers
measurement
Noise
Optical fiber sensors
Optical interferometry
Optical sensors
Radio frequencies
Radio frequency
Sensors
Strain
strain sensing
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Description
Summary:We frequency stabilize a fiber laser for use in low-frequency sensing applications. Using a radio frequency locking technique, an Erbium-doped single longitudinal mode fiber laser is stabilized to a Mach-Zehnder interferometer. The low-frequency fiber laser noise was suppressed by more than 1.5 orders of magnitude at frequencies below 300 Hz reaching a minimum of 2 Hz/radicHz between 60 and 250 Hz. The corresponding strain sensitivities are 2 pepsiv/radicHz at 1 Hz and 15 fepsiv/radicHz from 60 to 250 Hz.
ISSN:1530-437X
1558-1748
DOI:10.1109/JSEN.2009.2024040