Affiliation:
1. International School for Optoelectronic Engineering
2. Shanghai Institute of Optics and Fine Mechanics
Abstract
In this paper, we explore the laser properties of a 2.1 µm Ho:LaF3 laser intracavity pumped by a LD-pumped Tm:YLF laser. Ho:LaF3 crystals, with a doping concentration of 2%, have been verified as a novel type of laser gain material, whose luminescence lifetime of the 5I7 level was up to 25.7 ms. The Ho:LaF3 laser achieved an average output power of 2.07 W with a slope efficiency of 16.2%. The dual-wavelength output centered at 2089 nm and 2093 nm and exhibited excellent spot quality with M2x and M2y values of 1.19 and 1.23, respectively. Our results effectively demonstrate the impressive capability of Ho:LaF3 crystals for generating high-power 2.1 µm mid-infrared lasers.
Funder
Taishan Scholars Program of China
National Natural Science Foundation of China
Natural Science Foundation of Shanghai
Qilu University of Technology (Shandong Academy of Sciences), Talent Research Project
Natural Science Foundation of Shandong Province