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

Volume

10

Issue

6

fYear

2010

fDate

6/1/2010 12:00:00 AM

Firstpage

1117

Lastpage

1124

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/Â¿Hz (-145 dB/ reg/Â¿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;

fLanguage

English

Journal_Title

Sensors Journal, IEEE

Publisher

ieee

ISSN

1530-437X

Type

jour

DOI

10.1109/JSEN.2009.2039128

Filename

5443649