TERAHERTZ LASER, TERAHERTZ SOURCE AND USE OF SUCH A TERAHERTZ LASER

摘要

The invention relates to a terahertz laser (1) suitable for emitting at least one first electromagnetic radiation, a first emission frequency of which is between 700 and 1200 GHz. Said laser comprises an infrared laser source (10) and a resonant cavity (20) arranged to be optically pumped by the infrared laser source (10), said resonant cavity (20) containing ammonia gas as an amplifier medium and having at least one configuration in which the resonant cavity (20) is a resonant cavity at the first emission frequency. The infrared laser source (10) is a continuous semiconductor laser source capable of exciting molecules of the amplifier medium from an initial energy level to at least one first excited energy level, the molecules of the amplifier medium placed in said first energy level being able to relax through a pure inversion transition for which the relaxation energy corresponds to the first emission frequency. The invention further relates to a terahertz source comprising a terahertz laser according to the invention and a use of the terahertz laser according to the invention.