Laser radiation device employing a fiber laser capable of emitting a laser beam including two or more wavelength components

摘要

A laser radiation device comprises a pumping light emission section (1), a fiber laser device (14) and a beam guiding section (13, 13A, 13B). The pumping light emission section (1) generates and emits pumping light (2). In the fiber laser device (14), an optical fiber (4) doped with laser ions is excited by the pumping light (2) and thereby a laser beam (6) including two or more wavelength components is generated. The beam guiding section (13, 13A, 13B) guides the laser beam (6) into desired place and direction. The laser beam (6) including the two or more wavelength components having characteristic effects are focused by a beam shaping section (10) and applied to the surface of an object (11). When holmium ions are doped in the optical fiber (4) of the fiber laser device (14) as the laser ions, a laser beam (6) including a 3 mu m band component (which is suitable for precise incision of a living body) and a 2 mu m band component (which is suitable for tissue coagulation and hemostasis) is emitted by the fiber laser device (14), and the two wavelength components are applied to the surface of the object (11) maintaining coaxiality, thereby the two effects of the two wavelength components are attained simultaneously on the object (11).