Fiber laser for inhibiting stimulated Raman scattering effect and manufacturing method thereof

Abstract

The application relates to a fiber laser for inhibiting the stimulated Raman scattering effect; the fiber laser comprises a semiconductor pumping source and an active fiber, the semiconductor pumping source is connected with the active fiber, and the fiber laser further comprises at least one pair of first gratings arranged on the input side and the output side of the active fiber respectively and the at least one inclined grating arranged on the output side of the active optical fiber; and at least one of the first grating and the inclined grating is arranged on the active optical fiber in an inscribing manner. According to the fiber laser method for inhibiting the stimulated Raman scattering effect, a laser source is adjusted according to preset laser power and irradiation time, and at least one of the pair of first gratings and the at least one inclined grating is inscribed at the grating to be inscribed of the active fiber. The fiber bragg gratings with different functions are inscribed on the basis of the active fiber, so that the welding points of the laser can be further reduced, the welding loss is reduced, the laser is more compact, the efficiency of the laser is improved, and meanwhile, the stimulated Raman scattering effect can be inhibited.

Description

technical field [0001] The present application relates to a laser device, in particular to a fiber laser suppressing the effect of stimulated Raman scattering and a manufacturing method thereof. Background technique [0002] Compared with traditional solid-state lasers, fiber lasers have the advantages of high light-to-light conversion efficiency, good beam quality, compact structure, and good heat dissipation. With the development of fiber laser technology and the maturity of supporting fiber devices, the output power of fiber lasers is getting higher and higher. High-power fiber lasers have been widely used in metal cutting, welding, cladding, national defense, scientific research and other fields. The stimulated Raman scattering effect is one of the main factors that currently limit the further improvement of the power of fiber lasers. Therefore, in the field of high-power fiber lasers, improving the efficiency of lasers and suppressing the effect of stimulated Raman sc...

AI Technical Summary

Problems solved by technology

However, the more fiber fusion points in the fiber laser, it will not only introduce higher fiber fusion loss, but also affect the overall output efficiency of the laser

In addition, the more the number of optical fiber devices introduced, the longer the pigtail of the device, which will also reduce the stimulated Raman scattering threshold of the laser

Images