title: Resonantly pumped monolithic nonplanar Ho:YAG ring laser with high-power single-frequency laser output at 2122 nm.
abstract: We demonstrated a stable single-frequency laser operating at 2122 nm from a monolithic nonplanar Ho:YAG ring oscillator (NPRO). The Ho:YAG NPRO was resonantly pumped by a 1907 nm Tm:YLF laser built up by ourselves. The maximum multimode output power from the Ho:YAG NPRO was 9.66 W and the slope efficiency was 71.7%. With accurate adjustment of the pump position to make the laser oscillate in single frequency condition, an output power of 8.0 W was obtained with a slope efficiency of 61.4% and an optical-optical efficiency of 50.0%. The power stability of the Ho:YAG NPRO laser was 0.29% at maximum single frequency output power. The beam quality M(2) factors were measured to be less than 1.1 in x- and y- directions.
authors.affiliation: School of Opto-Electronics, Beijing Institute of Technology, Beijing 100081, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Wang
authors.forename: Chunqing
authors.initials: C
authors.lastname: Gao
authors.forename: Mingwei
authors.initials: M
authors.lastname: Gao
authors.forename: Yan
authors.initials: Y
authors.lastname: Li
mesh_terms: D004867:Equipment Design; D019544:Equipment Failure Analysis; D007834:Lasers