Optical fiber coupler

Abstract

The invention relates to the technical field of optical fiber lasers, in particular to an optical fiber coupler. The optical fiber coupler is obtained by forming optical fiber bundles composed of a plurality of optical fibers provided with rectangular fiber cores and rectangular wrapping layers into a hole through a fused biconical taper, and is cut off and manufactured at the fused biconical taper, and the cut-off section formed by cut-off is adopted as the output end of the optical fiber coupler; the multiple optical fibers form optical fiber bundles through mold fixation; the mold is provided with a V-shaped groove array for fixedly embedding the optical fibers; the mold is provided with a rectangular groove array for pressing down the fixed optical fibers; the mold is formed by glass or ceramics; the multiple optical fibers form the optical fiber bundles through UV adhesive fixation; the cross sections of the optical fiber bundles composed of the multiple optical fibers are rectangular or similar to a circle; the cut-off section is rectangular or similar to a circle or is in a irregular shape. The coupler is reasonable in design, simple in structure, easy to manufacture, low incost and suitable for large-batch production.

Description

Technical field [0001] The invention relates to the technical field of fiber lasers, in particular to the design and manufacture of a fiber coupler. Background technique [0002] As a representative of the third-generation laser technology, fiber lasers have been widely used. Fiber coupler is an important part of fiber laser, it directly affects the coupling efficiency and even affects the power index of fiber laser. [0003] At present, the high-power fiber lasers on the market have complex structures and large volumes, which make them have certain application limitations. Among them, the structure of fiber couplers is more complicated, and it is not easy to mass produce and reduce costs. Production repeatability and stability are not enough, the output spot is difficult to control, the output power increase is limited, and it is difficult to adapt to the wide application of fiber lasers at the current stage. Summary of the invention [0004] The purpose of the present invention ...

AI Technical Summary

Problems solved by technology

[0003] At present, the structure of high-power fiber lasers on the market is relatively complex and the volume is large, which makes it have certain application limitations. The structure of the fiber coupler is relatively complicated, and it is not easy to mass produce and reduce costs. The fiber coupler The production repeatability and stability are not enough, the output spot is difficult to control, the output power increase is limited, and it is difficult to adapt to the wide application of fiber lasers at the current stage

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