Thulium-doped fiber lasers with direct pumping. Medical perspectives

A family of compact thulium fiber lasers with a power of up to 40 W and wavelengths of 1.908 and 1.94 mcm is presented. There has been implemented the original scheme with one-piece fiber resonator, direct laser-diode pumping, and jointless output of radiation into the working lightguide. The devices are designed to perform operations of a wide class in open and endoscopic surgery.