title: Self-injection-locking of a CW-OPO by intracavity frequency-doubling the idler wave.
abstract: We report on the observation of self-injection-locking of the signal wave of an optical parametric oscillator (OPO) with the intracavity frequency doubled idler wave. The two-mirror OPO is based on a periodically poled LiNbO3 (PPLN) crystal and pumped with a grating stabilized, continuous-wave (CW) single-frequency diode master-oscillator power-amplifier (MOPA) system. Simultaneous quasi-phase-matching (QPM) of OPO and second harmonic generation (SHG) is provided in the same crystal which carries two different domain gratings. The beat of the signal wave and the frequency-doubled idler wave is suppressed within a 500-kHz wide frequency range centered around zero as expected for self-injection- locking. The measurements prove the feasibility of optically phase-stabilized by-three-division of an optical frequency with CW-OPOs using cascaded nonlinearities.
authors.forename: D H
authors.initials: DH
authors.lastname: Lee
authors.forename: M
authors.initials: M
authors.lastname: Klein
authors.forename: J P
authors.initials: JP
authors.lastname: Meyn
authors.forename: P
authors.initials: P
authors.lastname: Grob
authors.forename: R
authors.initials: R
authors.lastname: Wallenstein
authors.forename: K
authors.initials: K
authors.lastname: Boller