Measurement of output characteristics of Tm:YAG laser at 25–300K

In this paper, output characteristics of a laser diode end-pumped Tm:YAG laser in a wide temperature range were investigated. In this laser system, a Tm:YAG crystal was cooled in a cryostat with liquid helium or liquid nitrogen as coolant. At the temperature of 88K, a maximum output power of 4.68W is achieved when the incident pump power is 8.9W, and the optical–optical conversion efficiency is 52.6%, with a slope efficiency of 56.1%. The dependence of the output characteristics of Tm:YAG on temperature was experimentally studied in the temperature range of 25–300K.