Synchronous and noncollinear infrared upconversion in AgGaS2

Abstract
Synchronous noncollinear upconversion detection is reported for the first time with a Nd:YAG laser in AgGaS2. Q‐switched pump laser pulses with a repetition rate up to 50 Hz were synchronized with intracavity chopped continuous wave CO2 laser pulses. Results were obtained both by tuning the CO2 laser and by varying the angle between the laser beams.