Terahertz wave Parametric Generation based on Frequency Controlled 1.5 μm beams using a Spectral Drill Cavity

We demonstrated terahertz wave parametric generation based on frequency controlled 1.5 $\mu$m beams in a nonlinear MgO:LiNbO
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crystal. The pumping beam is generated using a PPLN-OPG seeded by a stabilized laser beam as traceable to the national standard. The generated pulses are amplified by a KTA-OPA pumped by a SLM Nd:YAG MOPA system. The seeding beam is monitored and controlled by a “spectral drill” cavity. The frequency of seeding beam is observed as intensity of error signal. We expect that these methods will open up new fields.