title: Nonclassical intensity correlation from a type I phase-matched optical parametric oscillator.
abstract: Signal and idler beams from a type I phase-matched nondegenerate optical parametric oscillator are separated by a Mach-Zehnder interferometer. Broadband nonclassical intensity correlation is observed, in agreement with a theory that includes pump noise. The maximum observed correlation, which occurs at 1.1 MHz, yields a noise level 2.8 dB below the shot noise.
authors.forename: K W
authors.initials: KW
authors.lastname: Leong
authors.forename: N C
authors.initials: NC
authors.lastname: Wong
authors.forename: J H
authors.initials: JH
authors.lastname: Shapiro