We observe second harmonic generation via random quasi-phase-matching in a 2.0 micron 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.
Stivala, S., Busacca, A., Pasquazi, A., Oliveri, R.L., Morandotti, R., Assanto, G. (2010). Random quasi-phase-matched second-harmonic generation in periodically poled lithium tantalate. OPTICS LETTERS, 2010-02-01, 363-365 [10.1364/OL.35.000363].
Random quasi-phase-matched second-harmonic generation in periodically poled lithium tantalate
STIVALA, Salvatore;BUSACCA, Alessandro;OLIVERI, Roberto Luigi;
2010-01-01
Abstract
We observe second harmonic generation via random quasi-phase-matching in a 2.0 micron 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.
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