A multi-wavelength laser photocoagulation system

By introducing a combination of self-frequency doubling and reflection modules into the laser photocoagulation system, the problem of large-scale optical path structure was solved, achieving efficient generation of multi-wavelength lasers and improved light quality, thus enhancing system compactness and beam quality.

CN116585097BActive Publication Date: 2026-06-30QINGDAO LASENCE GRP CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
QINGDAO LASENCE GRP CO LTD
Filing Date
2023-04-24
Publication Date
2026-06-30

AI Technical Summary

Technical Problem

The existing laser photocoagulation system has a large optical path structure, resulting in a bulky device. In addition, different wavelength laser beams require one-to-one matching laser crystals and pump sources, which makes the optical path structure complex.

Method used

The design employs a combination of two excitation modules, a self-frequency doubling module, a reflection module, and a shaping module. By placing a self-frequency doubling module between the excitation modules, the generation of multi-wavelength lasers is achieved by utilizing the frequency doubling effect of the laser crystal and the reflection effect of the reflection module. Parallel light is output through the shaping module, reducing the parallel arrangement of the laser crystal to avoid resonant cavity interference.

Benefits of technology

This technology enables the miniaturization of laser photocoagulation systems while maintaining high-quality multi-wavelength laser output, thus improving the quality of the light and the compactness of the system.

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Abstract

This application relates to a multi-wavelength laser photocoagulation system, comprising two excitation modules, a self-frequency doubling module, a reflection module, and a shaping module. The two excitation modules are arranged opposite to each other. Each excitation module includes at least one pump source. The self-frequency doubling module includes multiple laser crystals and is disposed between the two excitation modules. The multiple pump sources input pump lasers to the self-frequency doubling module. The absorption peaks of the pump lasers are matched one-to-one with those of the laser crystals, so that the pump lasers are frequency-doubled and excite multiple beams of visible light of different wavelengths. The reflection module is disposed between the excitation modules and the self-frequency doubling module. The reflection module is used to reflect the visible light so that the visible light is incident on the shaping module. The visible light is shaped into parallel light by the shaping module before being emitted. This application helps to reduce the size of the optical path structure of the photocoagulation system.
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