Cherenkov Phase-Matched Monochromatic Thz-Wave Generation Using Difference Frequency Generation With A Lithium Niobate Crystal

We demonstrated a Cherenkov phase-matching method for monochromatic THz-wave generation using the difference frequency generation process with a lithium niobate crystal, which resulted in high conversion efficiency and wide tunability. We successfully generated monochromatic THz waves across the range 0.2-3.0 THz. We obtained efficient energy conversion in the low frequency region below 0.5 THz, and achieved a flat tuning spectrum by varying the pumping wavelength during THz-wave tuning. (C) 2008 Optical Society of America.