Ultra-Low Photon Defect Diode-Pumped Cryo-Cooled Er:YAG Laser

摘要

Efficient ultra-low-photon-defect resonantly diode-pumped Er:YAG cryogenically-cooled laser is demonstrated for the first time. Quasi-CW diode pumping by InGaAsP/InP 10-diode bar stack (without spectral narrowing) was implemented. Laser performance at ～80°K in this first experiment was found to be 71.5% efficient (output power versus power absorbed in the cavity mode, slope). Er.YAG laser output variations with the gain medium temperature was investigated. Maximum quasi-CW power of ～65 W was achieved by optimization the gain medium operating temperature.