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A Spatial Intensity Shaping Method of Laser Frequency Tripling

A space-strength, triple-frequency technology, applied in the field of laser applications, can solve problems such as poor safety of laser systems, poor quality of triple-frequency laser output beams, etc., and achieve the effect of improving reliability

Active Publication Date: 2017-02-01
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to solve the problem that the quality of the output beam of the existing frequency tripled laser is poor and the safety of the laser system is poor, the present invention further proposes a method for shaping the spatial intensity of the laser tripled frequency

Method used

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  • A Spatial Intensity Shaping Method of Laser Frequency Tripling
  • A Spatial Intensity Shaping Method of Laser Frequency Tripling
  • A Spatial Intensity Shaping Method of Laser Frequency Tripling

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specific Embodiment approach 1

[0010] Specific implementation mode one: combine Figure 1 to Figure 22 To illustrate this embodiment, a method for spatial intensity shaping of laser triple frequency described in this embodiment is realized through the following steps:

[0011] Step 1, generating a liquid crystal compensation triple frequency image;

[0012] Step 2, generate triple frequency laser partial shaping image;

[0013] Step 3: Complete the space intensity shaping.

[0014] The high-power laser system used in this embodiment includes a front-end seed source, a pre-amplifier system, a main amplifier system, a frequency conversion system, beam control, a measurement system, and a computerized centralized control system. Among them, the front end of the high-power laser system adopts an all-fiber structure, which can output a laser wavelength of 1053mm, an energy of 10nJ, and a pulse width of 3ns square wave; the pre-amplification system provides a high gain of 10 5 There is a liquid crystal spatial...

specific Embodiment approach 2

[0016] Specific implementation mode two: combination Figure 1 to Figure 22 Describe this embodiment, the steps of a spatial intensity shaping method for frequency tripled laser described in this embodiment, the specific steps for generating a liquid crystal compensated frequency tripled image are as follows:

[0017] Step (1), the original image is written into the liquid crystal, the laser is operated, and the CCD is used to collect the fundamental frequency light spot and the triple frequency light spot;

[0018] Step (2), determining the spatial correspondence between the CCD for measuring the fundamental frequency and the triple frequency and the liquid crystal spatial light modulator. Write the positioning hole on the original image, write it into the liquid crystal, run the laser, observe the changes of the positioning hole on the fundamental frequency CCD and triple frequency CCD, and determine their spatial relationship with the liquid crystal spatial light modulator,...

specific Embodiment approach 3

[0023] Specific implementation mode three: combination Figure 1 to Figure 22 To illustrate this embodiment, the specific steps of generating a triple frequency laser local shaping image in step 2 of a spatial intensity shaping method of a laser triple frequency described in this embodiment are as follows:

[0024] Step A, the initial image is written into the liquid crystal, the laser is operated, and the triple frequency spot is collected by the CCD;

[0025] Step B, extract the triple frequency spot, find some points with larger flux, and record the position;

[0026] Step C. Write a hole in the corresponding position of the initial image, select a suitable hole softening factor, hole size and hole depth, and generate a triple frequency laser local shaping image.

[0027] Other components and connections are the same as those in the first embodiment.

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Abstract

The invention belongs to the optical field, and relates to a space intensity shaping method, in particular to a laser tripled-frequency space intensity shaping method. The problems that an existing tripled-frequency laser output beam is poor in quality and laser system running is poor in safety are solved. The method comprises the specific steps that firstly, a liquid crystal compensation tripled-frequency image is generated; secondly, a tripled-frequency laser local shaping image is generated; thirdly, space intensity shaping is completed.

Description

technical field [0001] The invention relates to a spatial intensity shaping method, in particular to a spatial intensity shaping method for laser triple frequency, and belongs to the field of laser applications. Background technique [0002] In recent years, the demand for high-power laser applications in industrial processing, scientific research and other fields has continued to expand. Because of its relatively high gain, solid-state lasers are widely used in the field of high-power lasers. High-power ultraviolet lasers have short wavelengths and low diffraction, and are widely used in industrial processing and scientific research. The generation of ultraviolet laser mostly adopts the method of nonlinear frequency conversion, and KDP crystal is generally used as the medium of nonlinear frequency conversion. Triple-frequency lasers are widely used in the field of spatial intensity shaping, but the quality of the output beams of existing triple-frequency lasers is poor, a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B27/09H01S3/10
CPCG02B27/0927H01S3/10
Inventor 吕志伟李森森王雨雷朱成禹何伟明林殿阳陈义杜鹏远王新巴德欣远航郑振兴
Owner HARBIN INST OF TECH
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