CA-1231 Frequency Doubling
Educational Objectives
l Behavior of Nonlinear Optics
l Second Harmonic Generation
l Power of SHG-Radiation
A KTP crystalconverts the Nd:YAG emission intra-cavity to green light. For green emissionabove 5 mW an outputcoupler mirror highly transmissive at532 nm is provided.Using an IR-absorbing filter the quadratic response of the SHG process ismeasured. Transverse cavity modes of the Nd:YAG laser are visualized by SHG impressively.
CA-1232 Active Q-Switching
Educational Objectives
l Active Q-Switch Technique
l Electro-Optical Modulator
l Q-Switching Behavior
A LiNbO3-Pockels cell changes the polarization state of the Nd:YAGemission. A Brewster plate introduces losses and laser operation is suppressed.When switching the cell, the losses are minimized and a laser pulse builds up.Switching voltage and frequency are adjusted by the Pockels cell controller. Incombination with CA-1231 intra- and extra-cavity SHG can be shown.