Optical-Fiber Accelerometer Array: Nano-g Infrasonic Operation in a Passive 100 km Loop

Optical-Fiber Accelerometer Array: Nano-g Infrasonic Operation in a Passive 100 km Loop

In this paper, an all-optical accelerometer array system is presented, ideally suited for permanent seismic seabed arrays and passive surveillance. A directly measured accelerometer resolution of better than 60 ng/¿Hz (-145 dB/ reg/¿Hz) down to 10 Hz is achieved for all channels in a completely pass...

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Veröffentlicht in:IEEE sensors journal 2010-06, Vol.10 (6), p.1117-1124
Hauptverfasser: Littler, I.C.M., Gray, M.B., Lam, T.T.-Y., Chow, J.H., Shaddock, D.A., McClelland, D.E.
Format: Artikel
Sprache:eng
Schlagworte:
Acceleration measurement
Accelerometers
Arrays
Channels
Crosstalk
Electromagnetic measurements
fiber optics
Geophysical measurements
Magnetic field measurement
Nanomaterials
Nanostructure
Noise levels
oil industry
Optical arrays
Optical fiber sensors
Resonance
Seismic engineering
Seismic phenomena
seismic transducers
Springs
Surveillance
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Beschreibung
Zusammenfassung:In this paper, an all-optical accelerometer array system is presented, ideally suited for permanent seismic seabed arrays and passive surveillance. A directly measured accelerometer resolution of better than 60 ng/¿Hz (-145 dB/ reg/¿Hz) down to 10 Hz is achieved for all channels in a completely passive 100 km fiber loop. The detection bandwidth is chosen to be from 10 to 300 Hz, with a closed-loop dynamic range of 120 dB. The crosstalk between channels spaced by 100 GHz is better than -64 dB.
ISSN:1530-437X
1558-1748
DOI:10.1109/JSEN.2009.2039128