Q-switched resonantly diode-pumped Er3+:YAG laser with fiberlike geometry

摘要

Crystalline fiberlike diode-pumped laser systems offer a convenient way to obtain compact, robust, and efficientnoperation whenever long active media are required. One of these cases is the diode-pumped Er3þ:YAG laser emittingnat 1:6 μm, where long crystals are needed to avoid the upconversion processes. By resonantly pumping the 4I13=2nlevel around 1:53 μm, and by confining the pump radiation into the crystal by total internal reflection, a maximumnoutput power of 14:5 W in cw mode is reached when pumped with ~40Wof absorbed power. In Q-switching mode,npulse energies of more than 8 mJ were obtained at a repetition rate of 90 Hz, limited by coating damage.