Patent ID: 6072921
Filing Date: 2000-06-06
Classification: G01H,H04R

Abstract:
A method of operating a fiber-optic acoustical sensor, said method comprising steps of:providing into one end of an elongate fiber-optic conductor a pair of orthogonally-polarized light beams;providing a polarizer receiving said pair of orthogonally-polarized light beams from a second opposite end of said elongate fiber-optic conductor and responsively providing a polarized output light beam;providing an optical acoustical transducer receiving said polarized output light beam and also receiving acoustical energy ambient to said transducer, andutilizing said optical acoustical transducer to responsively providing a modulated optical output light beam signal analogous to a characteristic of said acoustical energy;further including the step of providing said pair of orthogonally-polarized light beams in the form of a train of time-interleaved pulses of light.