Patent ID: 6766075
Filing Date: 2004-07-20
Classification: G02B,H01S

Abstract:
A side-pumped, fiber laser system, comprising:a double clad laser fiber having a numerical aperture and at least one flat surface, and having at least one core doped with at least one element which is photo-emissive in response to electromagnetic radiation of a particular wavelength; and a plurality of delivery fibers, each contiguous with the periphery of internal cladding of said laser fiber; characterized by the improvement comprising: each said delivery fiber delivering electromagnetic radiation into said laser fiber at an acute angle selected to provide substantially total internal reflection within said laser fiber of any electromagnetic radiation transmitted into said internal cladding; each said delivery fiber having a numerical aperture which is one-half or less of the numerical aperture of said laser fiber; and the refractive index of the core of each said delivery fiber being substantially equal to the refractive index of said inner cladding of said laser fiber.