title: Technique for measuring phase-conjugation fidelity by heterodyning signals.
abstract: A simple heterodyning technique is described that permits a rigorous measurement of the phase-conjugate fraction of a scattered beam in Brillouin scattering. A general expression for interferometry using phase-conjugate mirrors is derived. The applications of the technique to the measurement of laser phase structure and intensity-dependent phase shifts, and also for high-resolution determination of Brillouin acoustic frequencies, are discussed.
authors.forename: M J
authors.initials: MJ
authors.lastname: Damzen
authors.forename: M H
authors.initials: MH
authors.lastname: Hutchinson