Demonstration of CW THz generation using a two-color Ti-sapphire laser containing a Fabry-Perot etalon

Describes an experiment demonstrating generation of CW THz radiation from a Ti-sapphire laser. The laser was forced to oscillate on two modes by an intracavity Fabry-Perot etalon. The mode spacing was in the THz range, determined by the etalon thickness. A photoconductive antenna was used as a photomixing element to produce THz radiation, which was then detected by a Golay cell. A simple one-dimensional pattern was imaged using the setup.