Patent ID: 8911432

Claim:
An apparatus for medical treatment by means of laser light, comprising: an optical conducting fiber having a curved light emission end and comprising a core, a cladding arranged above the core for conducting laser light coupled into the optical conducting fiber, and capillaries arranged in the cladding, wherein said capillaries run in a longitudinal direction of the optical conducting fiber at a radial distance from a longitudinal axis of the optical conducting fiber and form at least one capillary ring when viewed in cross-section, wherein said capillaries have a light-emitting melt shut end and have cavities which are separated by bridges, said bridges having a width which is smaller than a wavelength of the laser light, wherein the laser light emerges from a forward surface of the light emission end, and wherein the laser light is transmitted in a direction which runs transverse to a substantially straight longitudinal section located directly in front of a curvature of the curved light emission end.