Abstract
This thesis reports tunable single- and two-color lasers with an intra-cavity etalon or an etalon output coupler. For the former, the two-color laser was generated at 1064.21 and 1064.69 nm (or 1064.27 and 1064.58 nm), with a 127 GHz (or 82 GHz) peak separation from an a-cut Nd:YVO4 with a 500 µm-thick (or 760 µm-thick) intra-cavity etalon. Hundreds of mW power from the 2-color laser was obtained with a pump of 14.8 W. By tilting the high-finesse etalon coupler, its high-loss transmission peak can be shifted to scan across the gain spectrum of the laser. With a 114 µm-thick etalon output coupler, a single-color laser was produced at 1066.7, 1065.0, or 1084.0 nm, whereas a two-color laser was produced at 1065.3 and 1067.0 nm with a 448 GHz peak separation from a c-cut Nd:YVO4 laser system. Moreover, a single-color laser was generated at 1063.7 or 1066.0 nm, whereas a two-color laser was generated at 1063.8 and 1066.0 nm with a 581 GHz peak separation from an Nd:GdVO4 laser system with a 150 µm-thick etalon output coupler.