AUTHOR=Cui Zheng , Yu Yong , Pan Chao 

TITLE=High efficiency continuous-wave Ho: LSO laser wing-pumped by the laser diode at 1.91 μm

JOURNAL=Frontiers in Physics

VOLUME=12

YEAR=2024

URL=https://www.frontiersin.org/journals/physics/articles/10.3389/fphy.2024.1407963

DOI=10.3389/fphy.2024.1407963

ISSN=2296-424X

ABSTRACT=<p>We present a high-efficiency continuous-wave Ho: LSO laser wing-pumped by a 1.91 μm laser diode. The impact of different output transmittances on the laser output power is compared and analyzed. The optimal result was achieved with a −500-mm radius curvature and a 6% transmission output coupler. The maximum output power of the Ho: LSO laser is 7.81 W, with a slope efficiency of 44.7%, a center wavelength of 2,106.6 nm, and beam quality factors of 1.4 in the <italic>x</italic>-direction and 1.3 in the <italic>y</italic>-direction.</p>