Continuous Wave Terahertz Generation from Photodiode-Based Emitters with up to 200 μ W Terahertz Power

The output characteristics of an optoelectronic terahertz (THz) transmitter based on a high-speed, waveguide-integrated photodiode is demonstrated. THz power measurements are performed with a calibrated pyroelectric detector. 1.4 J.lW at 1 THz and up to 200 μW at 52 GHz are obtained. Up to 35 mW, the current system limit for optical illumination power, no saturation of the THz output is observed.