SOLID-STATE UPCONVERSION LASER Russian patent published in 2013 - IPC H01S3/941 

FIELD: physics.

SUBSTANCE: solid-state upconversion laser includes an upconversion laser medium placed in an optical resonator, and a pumping device which includes two semiconductor radiation sources at wavelengths λ1 and λ2 and a fibre module arranged such that optical outputs of both pumping radiation sources are interfaced with the fibre module, and the focusing system is achromatic at wavelengths λ1 and λ2 and is arranged such that the output of the fibre module is interfaced through it with the upconversion laser medium.

EFFECT: homogenisation and high spatial concentration of pumping radiation.

4 cl, 3 dwg