title: Highly efficient phase-sensitive parametric gain in periodically poled LiNbO3ridge waveguide.
abstract: We have developed a periodically poled LiNbO3(PPLN) ridge waveguide device and experimentally demonstrated a phase-sensitive optical parametric amplification. The highly efficient net phase-sensitive parametric gain of +18.6  dB is obtained in a cascaded second harmonic generation and difference frequency generation configuration. The phase-sensitive gain is greater by +5.8  dB in comparison with the phase-insensitive gain. We successfully confirmed the phase-sensitive amplification with a high gain in the PPLN ridge waveguide.
authors.forename: Tadashi
authors.initials: T
authors.lastname: Kishimoto
authors.forename: Koji
authors.initials: K
authors.lastname: Inafune
authors.forename: Yoh
authors.initials: Y
authors.lastname: Ogawa
authors.forename: Hironori
authors.initials: H
authors.lastname: Sasaki
authors.forename: Hitoshi
authors.initials: H
authors.lastname: Murai