Use of periodically poled nonlinear materials for the generation of ultrashort pulses of mid- and far-infrared radiation

摘要

We report on the generation of mid- and far-infrared radiation using periodically poled materials. In particular, cw mode-locked fs-OPOs based on MgO:PPLN with strongly reduced photorefractivity and optical rectification in PPLN for the generation of tunable narrowband THz radiation will be discussed.