A method and apparatus for detection of ultrasonic vibrations using an interferometer built, in its preferred embodiment, with optical fibers is disclosed. The method and apparatus are particularly useful where perturbations and disturbances adversely affecting other interferometer configurations are...http://www.google.com/patents/US5894531?utm_source=gb-gplus-sharePatent US5894531 - Method and apparatus for detection of ultrasound using a fiber-optic interferometer
