OPTICAL PARAMETRIC GENERATOR BASED ON A SLANT- STRIPE PERIODICALLY POLED NONLINEAR MATERIAL WITH OPTIMISED LATERAL OUTPUT COUPLING OF A TERAHERTZ SIGNAL

摘要

An optical parametric device comprising a slant- stripe periodically poled nonlinear material that is operable to generate signal (KTHZ (1), KTHZ (2) and idler waves (Ki (1), Ki(2) ) in response to interaction with a pump wave (kp), the non- linear interaction being such that the pump and idler waves are collinear and the signal wave is non - collinear relative to the pump and idler waves, wherein the slant- stripe non- linear material is able to generate two idler waves and two signal waves, and the device is adapted to allow for the selection and output coupling of a required one of the two signal waves.