Optical fiber laser coupler

Abstract

The invention provides an optical fiber laser coupler, comprising a laser input optical cable, a laser shaping and coupling device and a multi-beam-mode energy transferring optical fiber, wherein themulti-beam-mode energy transferring optical fiber comprises a circular fiber core and annular fiber cores, and each annular fiber core is coaxial with the circular fiber core; a fluorine-doped layer is arranged between the circular fiber core and the annular fiber cores, and the fluorine-doped layer is arranged between adjacent annular fiber cores; an adjustable collimating lens assembly and an adjustable focusing lens assembly of the laser shaping and coupling device can horizontally move along a direction of a laser beam in a shell of the laser shaping and coupling device; the laser shapingand coupling device is used for coupling a laser beam input by the laser input optical cable, inputting the laser beam into different fiber cores of the multi-beam-mode energy transferring optical fiber and acquiring output laser beams in different beam modes. The optical fiber laser coupler provided by the embodiment of the invention combines different fiber core structures of the multi-beam-modeenergy transferring optical fiber by virtue of the laser shaping and coupling device and can independently realize real-time switching between different beam modes.

Description

technical field [0001] The present invention relates to the technical field of fiber lasers, and more particularly, to a fiber laser coupler. Background technique [0002] With the increasing application of fiber lasers in civil industry, defense industry, and medical industry, fiber laser technology has also developed rapidly in recent years, especially high-power fiber lasers have shown unique advantages in the field of industrial processing. At present, it has been widely used in the cutting of metal sheets, but at the same time it has shown great potential in welding, cladding, cleaning and other fields. However, with the increase of the fields covered by the application of fiber lasers, more requirements are put forward for the diversity of its beam modes. [0003] At present, the output beam modes of most fiber lasers on the market are basically Gaussian or Gaussian-like, but the application range of Gaussian or Gaussian-like beams is extremely limited. For example, ...

AI Technical Summary

Problems solved by technology

In order to obtain beams with different beam modes, in practical applications, complex spatial optical transformations are required, requiring each beam to correspond to a laser, which greatly increases the cost of use and system complexity

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