Thin-slice laser based on topological structure dodging layer and preparation method of thin-slice laser

By introducing a topological homogenizing layer and a composite homogenizing waveguide structure into a thin-film laser, the thermal management problem of the thin-film laser during high-power operation is solved, the pumping efficiency and beam quality are improved, higher power output and system stability are achieved, and the production process is simplified.

CN121965262APending Publication Date: 2026-05-01BEIJING UNIV OF TECH
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Patent Information

Application Number
CN202610153710.0
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2026-02-03
Publication Date
2026-05-01

AI Technical Summary

Technical Problem

Existing thin-plate lasers face challenges in thermal management during high-power operation, leading to thermally induced wavefront distortion and beam quality degradation. Furthermore, multi-pass pump structures are complex and it is difficult to achieve large-aperture gain media.

Method used

A thin-film laser based on a topological homogenizing layer is employed. By designing the topological pattern, the pump light is homogenized and the mode is matched in a composite homogenizing waveguide structure. The refractive index difference between low-refractive-index and high-refractive-index materials is used to form waveguide transmission. The number of optical components is reduced by integrating the planar waveguide structure, and the device is fabricated using mature micro-nano fabrication technology.

Benefits of technology

It improves pump efficiency and beam quality, reduces thermal load in the gain medium, achieves higher power output and system stability, simplifies the structure, and facilitates modular production.

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Abstract

The invention discloses a slice laser based on a topological structure dodging layer. The slice laser comprises a pumping system, a pumping light injection module and a composite dodging waveguide structure, pumping light generated by the pumping system enters the composite dodging waveguide structure through the pumping light injection module; the front end face of the composite dodging waveguide structure is plated with a pumping light wavelength high-reflective film and a laser wavelength antireflection film, and the rear end face of the composite dodging waveguide structure is plated with a pumping source wavelength and laser wavelength high-reflective film; the composite dodging waveguide structure comprises a slice gain medium, a topological structure dodging layer and a middle refractive index layer which are sequentially arranged from the front end face to the rear end face. The topological structure dodging layer is composed of a low-refractive-index material layer and a high-refractive-index material topological graph arranged on the low-refractive-index material layer; and the pump light injection module is fixed above the high refractive index material of the middle refractive index layer or the topological structure dodging layer. Pumping uniformity is improved fundamentally, high-order mode suppression and efficient fundamental mode extraction are facilitated, and output power and light beam quality are improved at the same time.
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