Far-infrared ultrashort-pulse in the wavelength range of 10 -30 μm is generated using an organic nonlinear crystal DAST. The frequency down conversion is performed by the difference frequency generation between the signal and idler waves from an optical parametric amplifier pumped by the 120 fs Ti: sapphire laser pulses. The pulse width is measured using the cross-correlation with the pump. In the present paper, the shortest pulse width of 210 fs was obtained with the spectrum range of 10 - 30 THz.
All Science Journal Classification (ASJC) codes
- Physics and Astronomy(all)