title: Fiber optic displacement sensor with subangstrom resolution.
abstract: A simple Fabry-Perot interferometer that uses a singlemode bidirectional fiber coupler as a beam splitter is described. With light from a high stability He-Ne laser focused on the optic fiber, noise levels of 0.5-A rms equivalent reflector displacements were obtained in a bandwidth of 0.02-1 kHz.
authors.forename: S
authors.initials: S
authors.lastname: Breen
authors.forename: B E
authors.initials: BE
authors.lastname: Paton
authors.forename: B L
authors.initials: BL
authors.lastname: Blackford
authors.forename: M H
authors.initials: MH
authors.lastname: Jericho