Random quasi-phase-matched second-harmonic generation in periodically poled lithium tantalate

Abstract

We observe second harmonic generation via random quasi-phase-matching in a 2.0 μm periodically poled, 1-cm-long, z-cut lithium tantalate. Away from resonance, the harmonic output profiles exhibit a characteristic pattern stemming from a stochastic domain distribution and a quadratic growth with the fundamental excitation, as well as a broadband spectral response. The results are in good agreement with a simple model and numerical simulations in the undepleted regime, assuming an anisotropic spread of the random nonlinear component.

References in corpus (2)

• Generation of the second-harmonic Bessel beams via nonlinear Bragg diffraction
• A stochastical model for periodic domain structuring in ferroelectric crystals

Cited by in corpus (5)

• Second-harmonic focusing by nonlinear turbid medium via feedback-based wavefront shaping
• Degenerate four-wave mixing in triply-resonant Kerr cavities
• Continuous-wave backward frequency doubling in periodically poled lithium niobate
• Purely nonlinear disorder-induced localizations and their parametric amplification
• Features of randomized electric-field assisted domain inversion in lithium tantalate