title: Two-dimensional PPLN for simultaneous laser Q-switching and optical parametric oscillation in a Nd:YVO4 laser.
abstract: We report on a tunable intracavity optical parametric oscillator (IOPO) achieved using a two-dimensional (2D) periodically poled lithium niobate (PPLN) as simultaneously an electro-optic (EO) Bragg Q-switch and an optical frequency mixer (OFM) in a diode-pumped Nd:YVO(4) laser. The 2D periodic domain inversion structure is designed to provide two orthogonal reciprocal vectors to respectively satisfy the phase-matching conditions required by the two quasi-phase-matching devices (i.e., the PPLN EO Bragg deflector and the PPLN OFM). At a ~140-V Q-switching voltage and a 1-kHz switching rate, we obtained a signal wave at 1550 nm with a pulse energy of 9.7 μJ (corresponding to a peak power of ~2.4 kW) from the IOPO at 9.1-W diode pump power. Simultaneously we also observed multi-wavelength generation from the system originating in the single-pass parametric conversions in the 2D nonlinear photonic crystal structure. Temperature tuning of the IOPO signal wavelength in the eye-safe region was also demonstrated.
authors: Department of Optics and Photonics, National Central University, Jhongli 320, Taiwan.
authors: W K
authors: WK
authors: Chang
authors: Y H
authors: YH
authors: Chen
authors: H H
authors: HH
authors: Chang
authors: J W
authors: JW
authors: Chang
authors: C Y
authors: CY
authors: Chen
authors: Y Y
authors: YY
authors: Lin
authors: Y C
authors: YC
authors: Huang
authors: S T
authors: ST
authors: Lin
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D007834:Lasers; D053844:Lasers, Solid-State; D009556:Niobium / Q000737:chemistry*; D009991:Oscillometry / Q000295:instrumentation*; D010087:Oxides / Q000737:chemistry*; D012815:Signal Processing, Computer-Assisted / Q000295:instrumentation*
chemical_list: D010087:Oxides; D009556:Niobium; C091692:lithium niobate