title: Strong signal suppression in single-pump optical parametric amplifiers.
abstract: We show that the combined action of parametric gain and Raman scattering can lead to the complete suppression of an input optical signal in a single-pump parametric amplifier. This suppression is due to an interference between the two parametric gain modes. The interference occurs only at a set of discrete combinations of pump power, phase mismatch, and frequency detuning. Experimentally we are able to demonstrate over 95% (13 dB) suppression of an input signal in an amplifier with a peak parametric gain of only 6 dB.
authors.affiliation: Physics Department, University of Auckland, Private Bag 92019, Auckland 1010, New Zealand.
authors.forename: J C C
authors.initials: JC
authors.lastname: Wang
authors.forename: S G
authors.initials: SG
authors.lastname: Murdoch
authors.forename: R
authors.initials: R
authors.lastname: Leonhardt
authors.forename: J D
authors.initials: JD
authors.lastname: Harvey