Solid state laser pumped by rectangular light guides from an elliptical cavity Available to Purchase

Using curved and twisted light guides, the pump radiation screened off by laser lamp in elliptical cavity was efficiently coupled to pump Nd:YAG laser crystal without affecting the performance of the main laser. With a transmission efficiency of 70%, the light guides of rectangular cross section are displayed around the crystal flow tube for a uniform pumping. For an efficient absorption of the active medium, a double-pass pumping scheme was accomplished with a reflecting coating. With a 98% output coupler, the measured output power was 0.8W, giving an electrical to optical efficiency of 0,8%.