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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Veröffentlicht in:	IEEE sensors journal 2009-08, Vol.9 (8), p.983-986
Hauptverfasser:	Lam, T.T.-Y., Chow, J.H., Mow-Lowry, C.M., McClelland, D.E., Littler, I.C.M.
Format:	Artikel
Sprache:	eng
Schlagworte:	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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Beschreibung
Zusammenfassung:	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