Patent ID: 6795460
Filing Date: 2004-09-21
Classification: H01S

Abstract:
A laser device for generating a laser beam by supplying a pumping light to a laser medium contained in an optical fiber comprising:an optical fiber having a core portion in which said laser medium is added and a cladding portion covering said core portion, a fluid medium having a refractive index substantially identical to said cladding portion at a wavelength of said pumping light, a pumping light reflecting portion having an interior reflective surface defining an inner space filled with said fluid medium, the inner space being substantially surrounded by said reflective surface, and the inner space containing at least a part of said optical fiber thereby to confine said pumping light interiorly thereof, and a pumping light introducing port for introducing said pumping light into said pumping light reflecting portion, wherein the pumping light enters said core portion through said cladding portion, and wherein said pumping light reflecting portion comprises a part of a passage for said fluid medium.