Laser line width narrowing and beam expansion method and system based on isosceles right-angle triangular prism

A laser line width and beam expander system technology, applied in the laser field, can solve the problems of high processing cost, long prism processing cycle, strict requirements on prism positioning accuracy and single prism incident angle, etc., achieve low processing cost and cycle, reduce internal Effect of flaw damage and high machining accuracy

Active Publication Date: 2016-11-23
RAINBOW SOURCE LASER RSLASER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0013] The technical problem to be solved by the present invention is that traditional right-angled triangular prisms used for line width narrowing and beam expansion usually require high-precision processing of specially designed vertex angles. The processing cycle of the prism is long and the processing cost is high. The strict requirements of positioning accuracy and single prism angle of incidence

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  • Laser line width narrowing and beam expansion method and system based on isosceles right-angle triangular prism
  • Laser line width narrowing and beam expansion method and system based on isosceles right-angle triangular prism
  • Laser line width narrowing and beam expansion method and system based on isosceles right-angle triangular prism

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Embodiment

[0038] Figure 4 It is a schematic diagram of an embodiment of the laser line width narrowing and beam expanding system based on the isosceles right-angle triangular prism of the present invention. Such as Figure 4 As shown, the system includes an output mirror 1 , a laser discharge cavity 3 , a prism group 3 and a grating 4 .

[0039] In this embodiment, the prism group 3 is composed of N cascaded isosceles right-angled triangular prisms cascaded in sequence, where N is a natural number and N is greater than or equal to 2. That is, the first prism 31 , the second prism 32 , . . . , the N−1th prism 33 and the Nth prism 34 . The prisms are arranged based on the combination of up-…up-down…-down, that is, in the incident direction of the light beam, the apex angles of the first M prisms are in the same direction, and the apex angles of the next N-M prisms are opposite to those of the first M prisms, where M is A natural number and less than or equal to N-1. The apex angle he...

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Abstract

The invention discloses a method and system for narrowing and expanding laser line width. The system includes a beam expanding device and a grating. The beam expanding device is used for one-dimensional beam expanding of the laser, and the grating is used for selecting the center wavelength of the laser. , so as to achieve line width narrowing. The beam expander is composed of a single prism or a prism group, and the single prism and the prisms forming the prism group are all isosceles right-angled triangular prisms. The invention has the advantages of simple structure, high processing precision, and little influence on the beam transmission wavefront. By selecting the incident angle of the prism and the number of prism group elements, different laser beam expansion magnifications can be realized, and the required narrow-band laser linewidth can be obtained. .

Description

technical field [0001] The invention belongs to the field of laser technology, and in particular relates to a method and system for narrowing and expanding laser line width and beam based on an isosceles right-angle triangular prism. Background technique [0002] Narrow bandwidth laser output at specific wavelengths has great applications. In order to meet the application requirements with spectral control requirements and narrow-band laser output, it is necessary to narrow the natural spectrum generated by the free oscillation of the laser through special line width narrowing spectral control measures, and at the same time perform high-precision wavelength selection. [0003] The spectral control method of combining beam expansion with prism group combined with grating splitting is the most widely used linewidth narrowing structure at present. The prism beam expander group expands the beam size one-dimensionally based on the dispersion characteristics of the prism. The pr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/09G02B7/18
Inventor 李慧赵江山单耀莹沙鹏飞宋兴亮蔡茜玮彭卓君范元媛张立佳鲍洋周翊王宇
Owner RAINBOW SOURCE LASER RSLASER
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