High-power optical fibre laser

摘要

A high-power optical fiber laser includes: an oscillator (1); a pumping laser (5) able to emit a high-power pumping optical radiation beam; and a signal-amplifying optical fiber (3) able to receive the optical source signal and the high-power pumping optical radiation beam so as to generate a high-power laser beam. The pumping laser includes a plurality of pumping multimode laser diodes (7a-7f) and a laser cavity, the laser cavity including a double-clad fiber (4) including: a neodymium-doped monomode waveguide; a fiber Bragg grating (9) forming one end of the laser cavity; and a fiber reflector (11) forming the other end of the laser cavity, the monomodefiber laser being able to generate a laser radiation beam when it is optically pumped by a pumping radiation beam originating from the plurality of pumping laser diodes in order for the laser cavity to emit a high-power pumping laser radiation beam.

主权项

1. A high-power optical fiber laser comprising:
an oscillator that emits a source optical signal to be amplified; a pump laser that emits a high-power pump optical radiation; and a signal-amplifying optical fiber operatively connected to receive said source optical signal and said high-power pump optical radiation, wherein, said pump laser comprises a plurality of multimode pump laser diodes and a laser cavity, said laser cavity consisting essentially of a double-clad fiber including a Neodymium-doped single-mode guide, an optical fiber Bragg grating forming a first end of said laser cavity and a fiber reflector forming an opposite, second end of said laser cavity, said single-mode laser fiber being optically pumped by a pump radiation at a wavelength of 806 nm coming from the plurality of pump laser diodes, said pump radiation being injected into the multimode clad of said double-clad amplifying fiber, and said optical fiber Bragg grating filtering and reflecting a pump signal amplified at a wavelength of 930 nm, so that said laser cavity emits a high-power pump laser radiation at the wavelength of 930 nm, and said signal-amplifying optical fiber comprises a Ytterbium-doped single-mode optical fiber section, said signal-amplifying optical fiber being optically pumped by said high-power pump optical radiation at the wavelength of 930 nm so as to amplify said source optical signal to generate a high-power laser beam at about 978 nm.