High Output Energy Quasi-Phase-Matched Optical Parametric Oscillator Using Diffusion-Bonded Periodically Poled and Single Domain LiNbO₃

Abstract

We report a quasi-phase-matched optical parametric oscillator with diffusion-bonded stacks of periodically poled lithium niobate (PPLN) and single domain lithium niobate. In the experiment, a 500-µm-thick PPLN wafer was diffusion-bonded between 500-µm-thick single-domain LN wafers. With large aperture and the crystal length of 40 mm, a low-threshold, high-output-energy quasi-phase-matched optical parametric oscillator was realized. The quasi-phase-matched optical parametric oscillator generated 1.61-µm-signal output energy of 2.35 mJ at the pump energy of 6.35 mJ.