Simultaneous forward and backward terahertz generations in periodically poled stoichiometric LiTaO3 crystal using femtosecond pulses
Forward and counterpropagated backward terahertz generations were demonstrated via
difference frequency generation using a femtosecond laser. By cooling the crystal to reduce
terahertz losses, we achieved the terahertz generations of 1.36 and 0.65 THz.
Temperature-dependent measurements showed gradual intensity increase of the terahertz
pulse and red shift of the center frequency as the temperature decrease from 255 to 143 K,
although there were insignificant decreases of the spectral bandwidth.
difference frequency generation using a femtosecond laser. By cooling the crystal to reduce
terahertz losses, we achieved the terahertz generations of 1.36 and 0.65 THz.
Temperature-dependent measurements showed gradual intensity increase of the terahertz
pulse and red shift of the center frequency as the temperature decrease from 255 to 143 K,
although there were insignificant decreases of the spectral bandwidth.
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