Title :
Optical-Fiber Accelerometer Array: Nano-g Infrasonic Operation in a Passive 100 km Loop
Author :
Littler, Ian C M ; Gray, Malcolm B. ; Lam, Timothy Tien-Yue ; Chow, Jong H. ; Shaddock, Daniel A. ; McClelland, David E.
Author_Institution :
Centre for Gravitational Phys., Australian Nat. Univ., Canberra, ACT, Australia
fDate :
6/1/2010 12:00:00 AM
Abstract :
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.
Keywords :
accelerometers; acoustic waves; fibre optic sensors; oceanographic equipment; seismic waves; seismology; sensor arrays; distance 100 km; frequency 10 Hz to 300 Hz; nano-g infrasonic operation; optical fiber accelerometer array; passive surveillance; permanent seismic seabed array; Accelerometers; Crosstalk; Electromagnetic measurements; Geophysical measurements; Magnetic field measurement; Optical arrays; Optical fiber sensors; Resonance; Springs; Surveillance; Acceleration measurement; fiber optics; oil industry; seismic transducers; surveillance;
Journal_Title :
Sensors Journal, IEEE
DOI :
10.1109/JSEN.2009.2039128
