Patent ID: 9112328
Filing Date: 2015-08-18
Classification: G02B,H01S

Abstract:
1. An optical source having a fiber emitting controlled transverse single-mode radiation at a wavelength lower than 1030 nm, comprising: at least one laser diode suitable for emitting a pumping wave, and a section of clad amplifying optical fiber having two ends, said clad amplifying optical fiber comprising a core and a pumping clad, the clad amplifying optical fiber being doped with a rare earth element, means for coupling a pumping source in the clad of said doped fiber, the core of the doped fiber comprising a cylindrical portion doped with a rare earth element selected from ytterbium, neodymium, and thulium, so as to obtain a core refractive index that is higher than that of the clad; and the excitation wavelength of said laser diode being between 750 nm and 960 nm; and a diameter of the inner clad is higher than 50 microns and a radius ratio of the pumping clad to the doped core is between 2.82 and 7.07.