Littler, Ian; Chow, Jong; Shaddock, Daniel; McClelland, David; Gray, Malcolm
The interrogation, via optical, fiber, of fiber Fabre Perot interferometers using laser based radio frequency modulation techniques, can provide ultra-sensitive acoustic sensing over very long distances. The benefits over other fiber optical acoustic sensing schemes include; immunity to laser polarization, coherence and intensity noise as well as reduced susceptibility to Rayleigh back scattering. Well defined error signals can be extracted at up to 120 km away. We report on the first...[Show more]
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