A simple liquid‐nitrogen Dewar has been constructed to hold semiconductor platelets for use in a ring laser assembly. Laser action in an external ring cavity is observed when the platelets are longitudinally pumped by an Ar+laser. Microscope objectives mounted outside the Dewar are used to focus the pump beam as well as the lasing beam onto the crystal. Positioning of the platelets in horizontal and vertical directions is accomplished by attaching the Dewar to anxyzstage.