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Green femtosecond laser and processing and using method thereof

A femtosecond laser and laser processing technology, applied in the field of lasers, can solve the problems of low processing efficiency and limited output power

Inactive Publication Date: 2021-05-18
WUHAN YANGTZE SOTON LASER CO LTD
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to overcome the problems of limited output power and low processing efficiency of traditional green femtosecond lasers in the background technology, thereby providing a green femtosecond laser

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  • Green femtosecond laser and processing and using method thereof
  • Green femtosecond laser and processing and using method thereof
  • Green femtosecond laser and processing and using method thereof

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Embodiment Construction

[0033] The technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Apparently, the described embodiments are some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0034] like Figure 4 , 5 The structure of a traditional green femtosecond laser is shown. High-power green femtosecond lasers usually use a femtosecond seed source to generate femtosecond pulses. The material of the femtosecond seed source is usually an optical fiber or crystal. Due to material limitations, the output wavelength of the femtosecond seed source is usually in the infrared band. Therefore, the output power of the femtosecond seed source is usually very low, generally on the order of milliwatts, ...

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Abstract

The invention relates to a green femtosecond laser and a processing and using method thereof, and the laser comprises a light beam shaper which is used for shaping a circular light spot outputted by an infrared femtosecond laser into a linear light spot through the light beam shaper; and frequency doubling crystal which is used for enabling the linear light spots to pass through the frequency doubling crystal to generate frequency doubling light; the infrared femtosecond laser, the beam shaper and the frequency doubling crystal are coaxially arranged in sequence at a certain distance, a circular beam generated by the infrared femtosecond laser is converted into a green-ray-shaped beam through the beam shaper and the frequency doubling crystal in sequence, and the green-ray-shaped beam irradiates a workpiece to perform linear machining. According to the invention, through the beam shaping device, a circular beam output by the infrared femtosecond laser is shaped into a linear beam with a larger mode field area, and then frequency multiplication is carried out, so that the output power is improved; and compared with traditional point-by-point scanning machining based on a circular output mode, the linear light beams can greatly improve the machining efficiency.

Description

technical field [0001] The invention relates to the technical field of lasers, in particular to a green femtosecond laser and a processing and using method thereof. Background technique [0002] At present, the output mode of the traditional green femtosecond laser is a circular Gaussian beam. Since the output spot of the laser is circular, when processing a straight line, it is usually necessary to process a series of densely distributed dots and combine them into a straight line. [0003] However, the circular output mode of traditional green femtosecond lasers usually needs to use point-by-point scanning in linear processing, which is inefficient and cannot meet the production requirements of high-power laser processing. [0004] Secondly, the output power of the traditional green femtosecond laser structure is often limited by the damage threshold of the frequency-doubling crystal and the coating on the surface of the frequency-doubling crystal, so that the existing gree...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/08H01S3/109
CPCH01S3/08059H01S3/109
Inventor 何飞陈抗抗
Owner WUHAN YANGTZE SOTON LASER CO LTD
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