Free-space quasi-phase matching

Abstract

We report a new approach to phase matching of nonlinear materials based on the free space multipass cells. This concept quasi-phase matches crystalline quartz and increases the second harmonic generation efficiency by a factor 40.

References in corpus (3)

• Laser spectroscopic characterization of the nuclear clock isomer ${}^{229m}$Th
• Optically reconfigurable quasi-phase-matching in silicon nitride microresonators
• Tunable and efficient ultraviolet generation in nanophotonic lithium niobate