Abstract

High sensitivity interferometric acoustic sensors have been demonstrated using optical fiber interferometry and ellipsoidal shells. A new push-pull winding scheme has been tested in which circular windings of optical fiber are bonded to the pole(s) and to the equator of an ellipsoidal shell. Previous push-pull ellipsoids incorporated one leg of the interferometer around the equator and the second around the meridional circumference. In the new scheme the polar leg replaces the equatorial leg while maintaining the desired push-pull performance.

© 1992 Optical Society of America