Flexural disk fiber optic hydrophone

摘要: A hydrophone or other acoustic vibration sensing apparatus having a disk circumferentially supported for flexure induced by vibrations and wound on each side with flat spiral of optical fiber fixedly attached to the so that due lengthens one shortens side. The spirals are connected as two legs optic interferometer provide an output corresponding while canceling errors pressure temperature effects common legs. pair disks associated may be mounted opposite ends body outer leg inner another cancel differences in lengths acceleration double sensitivity differential single disk.