We report 56% efficient external cavity resonant second harmonic generation of a diode-laser pumped, CW single-axial-mode Nd :YAG laser. A theory of external doubling with a resonant fundamental is presented and compared to experimental results for three monolithic cavities of nonlinear MgO : LiNb03. The best conversion efficiency was obtained with a 12.5 mm long monolithic ring cavity doubler,...

Due to tedious and time-consuming work put into the conventional mold/die microprocessing (about 37% of total time entire production). Therefore, improve or enhance quality mold/dies at final step with a less number trained skilled operators decrease processing cut overall cost dramatically, AISI-O1 cold steel was micro-processed by Pulsed Nd: YAG laser. The influence laser parameters on evolut...