Energy scalable terahertz-wave parametric oscillator using surface-emitted configuration

T. Ikari; R. Guo; H. Minamide; H. Ito

doi:10.2971/jeos.2010.10054

Journal of the European Optical Society - Rapid publications, Vol 5 (2010)

Energy scalable terahertz-wave parametric oscillator using surface-emitted configuration

T. Ikari, R. Guo, H. Minamide, H. Ito

Abstract

We experimentally demonstrated the scalability of the terahertz-wave parametric oscillator by using a pump beam with a wide aperture and a high pulse energy. Terahertz-wave absorption by the LiNbO3 crystal in the oscillator is substantially suppressed by employing a surface-emitting cavity configuration. We also improved the conversion efficiency by increasing the parametric interaction in the noncollinear phase-matching geometry. A pump depletion of 54% and a conversion efficiency of 0.9 Ã— 10-6 are achieved. A maximum terahertz output of 382 nJ/pulse was achieved at 1.46 THz using a 8.0-mm-diameter pump beam with a pulse energy of 465 mJ/pulse.

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