Researchers develop high-efficiency mid- and long-wave optical parametric oscillator pump source

https://phys.org/news/2023-02-high-efficiency-mid-long-wave-optical-parametric.html

"lasers widely applied in Lidar... Ho:YAG achieves high-efficiency 2.1 μm laser output by scanning and optimizing pump laser wavelength... tunable Tm:YLF laser is pump source... continuous tunability ranges from 1906.04 to 1908.83 nm, corresponding to a linewidth of less than 0.41 nm... light-to-light conversion efficiency 59.12%, slope efficiency 68.26% under center wavelength of pump source of 1907.36 nm... high-efficiency tunable long-wave UV type I phase matching with tuning range 8.02–9.15 μm"

Related: Engineers develop first-of-its-kind integrated optical isolator

https://phys.org/news/2023-06-first-of-its-kind-optical-isolator.html