High signal-to-noise-ratio electro-optical terahertz imaging system based on an optical demodulating detector array

We present a 64 x 48 pixel 2D electro-optical terahertz (THz) imaging system using a photonic mixing device time-of-flight camera as an optical demodulating detector array. The combination of electro-optic detection with a time-of-flight camera increases sensitivity drastically, enabling the use of a nonamplified laser source for high-resolution real-time THz electro-optic imaging. (C) 2009 Optical Society of America