Generation of tunable THz radiation at the difference frequency in a single crystal ZnGeP2 when pumped by two-frequency radiation at wavelengths ~ 2.12 μm Текст научной статьи по специальности «Физика»

THz-PS-3

Generation of tunable THz radiation at the difference frequency in a single crystal ZnGeP2 when pumped by two-frequency radiation at wavelengths ~ 2.12 ^m

A.Sirotkin1

1GPI Institute of General Physics RAS, OK, Moscow, Russian Federation

THz-radiation in ZnGeP2 single crystal with pumping by double frequency radiation of optical parametric oscillator in wavelength range ~ 2.12 |im based on KTP crystal with sizes 7'5'10 mm, cut by angle 0 ~ 51.5° relatively Z-axis in XY-plane was experimentally obtained. Intracavity pumping of OPO was carrying out by electro optical (EO) shutter. Maximum average power of THz radiation, achieved in the experiment, consisted ~ 3.3 nW (l= 181 ^m) (with pulse frequency repetition 800 Hz, pulse duration 10 ns, pulse energy 1 mJ). THz radiation tuning in ~ 120-270 ^m wavelength range was realized. Whereby, tuning range was limited just by ZnGeP2 single crystal aperture.