Fiber laser device
AssigneeFujikura Ltd.
InventorKensuke Shima
Life of this patent
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Abstract
An object of the invention is to provide a fiber laser device capable of stabilizing intensity of laser light output therefrom. A fiber laser device 100 includes: an pumping light source 11 configured to output pumping light; a rare earth-doped fiber 20 to which the pumping light is input; and a first FBG 30 formed on one side of the rare earth-doped fiber 20 and a second FBG 40 formed on the other side of the rare earth-doped fiber 20 that are configured to reflect light amplified in the rare earth-doped fiber 20, wherein the second FBG 40 has a reflectance lower than that of the first FBG 30, a reflection wavelength band in that of the first FBG 30, and Bragg wavelength on short wavelength side of Bragg wavelength of the first FBG 30.
Claims3
A fiber laser device comprising:
- an pumping light source configured to output pumping light;
- a rare earth-doped fiber to which the pumping light is input;
- and
- a first FBG formed on one side of the rare earth-doped fiber and a second FBG formed on the other side of the rare earth-doped fiber that are configured to reflect, light amplified in the rare earth-doped fiber, wherein
- the second FBG has a reflectance lower than that of the first FBG, a reflection wavelength band in that of the first FBG, and Bragg wavelength on short wavelength side of Bragg wavelength of the first FBG.
Dependencies are inferred from the claim text.