Patent Number: 7,787,725

Title: Fiber optic microphone and a communication system utilizing same

Abstract: An arrangement for a fiber optic microphone having at least one pair of optical fibers, each having an input end portion and an output end portion made of a material having a critical refractive angle .theta..sub.crit and having a numerical aperture NA. The input end portion of a first fiber is connectable to a source of light and the output end portion of a second fiber is connectable to a photoelectrical transducer. Both end portions have an inner diameter, an axis and a rim. The input and output end portions are mutually affixed along a single plane with their rims touching each other at a point, the axes forming an angle .alpha. therebetween. The rims are cut with respect to the axis, at an angle in a plane perpendicular to the single plane and to a bisector of angle .alpha. at the point, where .alpha.=2.times..theta..sub.crit-NA.

Inventors: Kahana; Yuvi (Rinatya, IL), Kots; Alexander (Ashdod, IL), Paritsky; Alexander (Modiin, IL)

Assignee: Optoacoustics Ltd.

International Classification: G02B 6/00 (20060101); G02B 6/26 (20060101); G02B 6/42 (20060101); B06B 1/06 (20060101); H04B 10/02 (20060101); H04B 10/12 (20060101)

Expiration Date: 8/31/12018