Myriawatt-level optical fiber connector capable of eliminating aberration

Abstract

The invention relates to a myriawatt-level optical fiber connector capable of eliminating aberration and belongs to the field of laser technology. The myriawatt-level optical fiber connector comprisesan optical fiber input terminal, a collimating lens assembly, a focusing lens assembly, an optical fiber output terminal and a lens water-cooling device. The collimating lens assembly comprises a first positive focal power crescent moon convex lens, a first aspherical negative focal power concave lens and a first positive focal power convex lens; the focusing lens assembly comprises a second positive focal power convex lens, a second aspherical negative focal power concave lens and a second positive focal power crescent moon convex lens; and the optical fiber input terminal, the optical fiberoutput terminal and all the lenses are sequentially coaxially arranged in a light propagation direction. The myriawatt-level optical fiber connector provided by the invention adopts 4 spherical lenses and 2 aspherical lenses in design, thereby having an aberration eliminating function while cost is reduced; materials and film layers of the lenses have high damage thresholds, and a cooling deviceis arranged, so that the connector can be used for myriawatt-level optical fiber laser transmission; and the connector has good interchangeability and compatibility and is applicable to transmission performed by optical fibers with different numerical apertures, so that the long-distance transmission problem from a light source to a workstation is effectively solved.

Description

technical field [0001] The invention relates to the field of optical fiber laser technology, in particular to an aberration-eliminating 10,000-watt optical fiber connector. Background technique [0002] In recent years, with the maturity of optical fiber preparation technology, the use of optical fiber to transmit high-energy laser beams has been widely used in industry, national defense, medical treatment, information and other fields. The use of optical fibers to transmit high-energy laser beams has the following advantages: (1) The flexible transmission of optical fibers makes it easy to integrate the light source with the robot arm, thereby realizing three-dimensional processing; (2) With the continuous improvement of optical fiber preparation technology, quartz optical fibers can The nearby transmission loss has been reduced to below 1dB / km, which is close to the lowest limit determined by Rayleigh scattering; (3) The laser transmission distance remains unchanged during...

AI Technical Summary

Problems solved by technology

[0003] At present, there are still unresolved problems in the fiber coupling process of lasers with a power of up to 10,000 watts: (1) Due to the high-power laser irradiation, the lens will be heated to a high temperature state, resulting in deformation or even damage to the lens

When the diameter of the incident spot is larger than the fiber core diameter or the divergence angle of the incident beam is larger than the fiber numerical aperture, part of the laser light will be transmitted along the waveguide of the cladding layer, and the laser light will overflow into the coating layer at a certain position during the process, thus A weak point is formed here, which can easily cause the fiber to be burned

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