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Opt Lett. 2000 May 15;25(10):737-9. doi: 10.1364/ol.25.000737.

Cylindrical KTiOPO(4) crystal for enhanced angular tunability of phase-matched optical parametric oscillators.

Optics letters

O Pacaud, J P Fève, B Boulanger, B Ménaert

PMID: 18064168 DOI: 10.1364/ol.25.000737

Abstract

We demonstrate what is to our knowledge the first optical parametric oscillator (OPO) based on a cylindrical phase-matched nonlinear crystal. Experiments are performed with an uncoated KTiOPO(4) crystal cut as a cylinder with a diameter of 21.2 mm and a thickness of 5 mm. We achieve 20.5-internal-degree angular tuning in a 1064-nm-pumped type III OPO, which would correspond to ~36 degrees external angular rotation for a parallelepipedal crystal. The goals of using such a device are to narrow the spectral width of the output and to enhance the spatial quality of the generated beams in widely tunable OPO's.

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