THERAPEUTIC TREATMENT DEVICE AND METHOD FOR THERAPEUTIC TREATMENT OF BIOLOGICAL LUMEN

摘要

An optical fiber (12) of a therapeutic treatment device (10A) has a core (16), a cladding (18) covering the core (16), and an emission section (20) that emits laser beams through a lateral circumferential surface (20a). The emission section (20) is provided with two or more grooves (annular grooves (26)), in the longitudinal direction, at different positions of the emission section (20). The two or more grooves have two or more kinds of shapes, and the laser beams emitted from adjacent grooves have different intensities.