MONOLITHIC, FIBER-TO-FIBER COUPLED NONLINEAR RESONATOR FOR BREWSTER CUT PERIODICALLY POLED CRYSTALS

摘要

An apparatus and method for nonlinear conversion of laser light is described herein. The apparatus of the instant invention comprises a fiber coupled light source, a cavity in optical alignment with the first light beam from the light source, wherein the cavity comprises: two concave mirrors, one or more Brewster-cut periodically poled crystals, and a cavity servo to lock the length of cavity to laser frequency. In one aspect of the present invention the feedback to the lock is S-polarized component of first laser light reflected off the Brewster surface of nonlinear crystal.