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Laser line-width reduction and beam expanding method and system based on isosceles right angle triangular prism

A technology of laser line width and beam expansion system, which is applied in the laser field, can solve the problems of strict requirements on prism positioning accuracy and single prism incident angle, high processing cost, and long prism processing cycle, and achieve low processing cost and cycle, and simple structure , Reduce the effect of internal defect damage

Active Publication Date: 2013-03-20
RAINBOW SOURCE LASER RSLASER
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  • Claims
  • Application Information

AI Technical Summary

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 reduction and beam expanding method and system based on isosceles right angle triangular prism
  • Laser line-width reduction and beam expanding method and system based on isosceles right angle triangular prism
  • Laser line-width reduction and beam expanding 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 beam expanding system based on the isosceles right angle triangular prism of the present invention. like 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-angle triangular prisms that are 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 front M prisms have the same apex angle, and the rear N-M prisms have the opposite apex angles to the first M prisms, where M is A natural number and less than or equal to N-1. The vertex angle here refers to a 45-degree a...

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Abstract

The invention discloses a laser line-width reduction and beam expanding method and a system. The system comprises a beam expanding device and a grating, wherein the beam expanding device is used for conducting one-dimensional beam expanding on laser light; the grating is used for conducting central wavelength selection on the laser light, so that line-width reduction is realized. The beam expanding device consists of a single prism or a prism combination, wherein the single prism and the prisms constituting the prism combination are isosceles right angle triangular prisms. The laser line-width reduction and beam expanding method and the system have the advantages that the structure simple, the processing precision is high, and a small effect is caused on beam transmission wavefront; different laser beam expanding multiplying factors are realized by selecting an angle of incidence and the number of elements of the prism combination; and a required narrow-band laser line-width is obtained.

Description

technical field [0001] The invention belongs to the technical field of lasers, and in particular relates to a laser line width narrowing beam expanding method and system 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 prism group beam expansion combined with grating splitting is currently a widely used line width narrowing structure. The prism beam expander group expands the beam size one-dimensionally based on the prism dispersion characteristics. The prism group has the advantages of convenien...

Claims

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Application Information

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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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