Coupled orbital angular momentum conversions in a quasi-periodically poled LiTaO3 crystal

Abstract

We experimentally demonstrate the orbital angular momentum (OAM) conversion by the coupled nonlinear optical processes in a quasi-periodically poled LiTaO3 crystal. In such crystal, third-harmonic generation (THG) is realized by the coupled second-harmonic generation (SHG) and sum-frequency generation (SFG) processes, i.e., SHG is dependent on SFG and vice versa. The OAMs of the interacting waves are proved to be conserved in such coupled nonlinear optical processes. As increasing the input OAM in the experiment, the conversion efficiency decreases because of the reduced fundamental power intensity. Our results provide better understanding for the OAM conversions, which can be used to efficiently produce an optical OAM state at a short wavelength.

References in corpus (7)

• Entanglement of Orbital Angular Momentum States of Photons
• Optical spin-to-orbital angular momentum conversion in inhomogeneous anisotropic media
• Beating the channel capacity limit for linear photonic superdense coding
• Experimental high-dimensional two-photon entanglement and violations of generalised Bell inequalities
• Frequency up-conversion and arbitrary sum arithmetic of lights with orbital angular momentum
• Orbital angular momentum light frequency conversion and interference with quasi-phase matching crystals
• Nonlinear Transformation of Orbital Angular Momentum through Quasi-phase Matching

Cited by in corpus (5)

• Generating controllable Laguerre-Gaussian laser modes through intracavity spin-orbital angular momentum conversion of light
• Third-harmonic generation of spatially structured light in a quasi-periodically poled crystal
• Mode Selective Image Upconversion over Turbulence
• Up-conversion detection of mid-infrared light carrying orbital angular momentum
• Nonlinear manipulation of orbital angular momentum spectra with second- and third- harmonic generation in a quasi-periodically poled crystal