Frequency-agile THz-wave generation and detection system using nonlinear frequency conversion at room temperature.
A surface-emitting THz parametric oscillator is set up to generate a narrow-linewidth, nanosecond pulsed THz-wave radiation. The THz-wave radiation is coherently detected using the frequency up-conversion in MgO: LiNbO(3) crystal. Fast frequency tuning and automatic achromatic THz-wave detection are achieved through a special optical design, including a variable-angle mirror and 1:1 telescope devices in the pump and THz-wave beams. We demonstrate a frequency-agile THz-wave parametric generation and THz-wave coherent detection system. This system can be used as a frequency-domain THz-wave spectrometer operated at room-temperature, and there are a high possible to develop into a real-time two-dimensional THz spectral imaging system.
Guo
Ruixiang
R
RIKEN Advanced Science Institute, 519-1399 Aramaki Aoba, Aoba-ku, Sendai 980-0845, Japan. rguo@i2r.a-star.edu.com
Ikar'i
Tomofumi
T
Zhang
Jun
J
Minamide
Hiroaki
H
Ito
Hiromasa
H
D017076:Computer-Aided Design; D004867:Equipment Design; D008029:Lighting / Q000295:instrumentation*; D017711:Nonlinear Dynamics; D012542:Scattering, Radiation; D013696:Temperature; D055053:Terahertz Radiation; D014159:Transducers