Study on the spectral characteristics of the cascaded parametric conversion in a single cavity tandem multi-channel PPMgLNs-based optical parametric oscillator
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- Wu, B., Yang, D.Z., Jiang, P.P. et al. Laser Phys. (2009) 19: 1383. doi:10.1134/S1054660X09070019
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We report an acousto-optic Q-switched Nd:GdVO4 laser pumped flexibly tunable cascaded optical parametric oscillator (OPO) based on two separate multi-channel periodically poled magnesium oxide doped Lithium Niobate (PPMgLN). Even under lower pump power, long wavelength parametric output was found to be more easily generated than in single stage OPO. A cascaded idler output at 5.075 μm was found to be generated. A convenient method to monitor the occurring of the cascaded parametric process was also presented by measuring the spectrum of sum-frequency generation of the pump power and the cascaded signal power.