Surface and subsurface detection sensor

Details Surface and subsurface detection sensor Surface and subsurface detection sensor

2008-07-08

2008-07-08

Mack, Ricky L (Department: 2873)

Optical: systems and elements

Optical modulator

Light wave temporal modulation

Reexamination Certificate

active

11437776

ABSTRACT:
A sensor comprises an optical modulator that generates a modulation signal, an interferometer that mixes an acoustic signal evoked by a pulsed laser with the modulation signal to down-convert the acoustic signal to lower frequencies, and a photodetector that detects the down-converted signal.

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