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Opt Express. 2010 Aug 2;18(16):16430-6. doi: 10.1364/OE.18.016430.

Frequency-agile THz-wave generation and detection system using nonlinear frequency conversion at room temperature.

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RIKEN Advanced Science Institute, 519-1399 Aramaki Aoba, Aoba-ku, Sendai 980-0845, Japan.


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.

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