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Laser based on monolithic KDP (Potassium Dihydrogen Phosphate) crystal cascade optical frequency conversion, and working method thereof

A crystal cascade and laser technology, applied in the field of lasers, can solve the problems of poor conversion efficiency, difficulty in obtaining high-power yellow light output, low peak power of fundamental frequency light, etc., achieve multiple output wavelengths, avoid instability, pulse narrow width effect

Inactive Publication Date: 2017-08-29
SHANDONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Limited by the low peak power of the fundamental frequency light and poor conversion efficiency, it is difficult to obtain high-power yellow light output

Method used

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  • Laser based on monolithic KDP (Potassium Dihydrogen Phosphate) crystal cascade optical frequency conversion, and working method thereof
  • Laser based on monolithic KDP (Potassium Dihydrogen Phosphate) crystal cascade optical frequency conversion, and working method thereof
  • Laser based on monolithic KDP (Potassium Dihydrogen Phosphate) crystal cascade optical frequency conversion, and working method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0048] A laser with cascaded optical frequency conversion based on a single KDP crystal, such as figure 1 As shown, it includes a pumping source 1, an aperture 2, an attenuation system 3, a lens 4, a frequency doubling tangential KDP crystal 5, a first color filter 6, and a second color filter 7 arranged sequentially along the optical path;

[0049] The pump source 1 generates laser light, which is incident into the KDP crystal 5. The KDP crystal 5 converts the fundamental frequency light into frequency-doubled light, and at the same time, the frequency-doubled light generates stimulated Raman scattering in the KDP crystal 5 to obtain the stimulated Raman scattering of the frequency-doubled light. For the stimulated Raman scattering laser, the optical frequency conversion of frequency doubling and stimulated Raman scattering cascade is realized in KDP crystal 5.

[0050] KDP crystal 5 is grown by an aqueous solution method, the growth technology is mature, and it is easy to gr...

Embodiment 2

[0059] According to embodiment 1, a laser based on cascaded optical frequency conversion of a single KDP crystal, the difference is that the cutting angle of the type II phase matching of KDP crystal 5 is (θ1, φ1), θ1=59°, φ1=0 °, the transparent surface is polished and uncoated, and the length is 32mm.

Embodiment 3

[0061] According to embodiment 1, a laser with cascaded optical frequency conversion based on a single KDP crystal, such as Image 6 As shown, the difference is that the lens 4 is replaced by a beam reduction system 8 .

[0062] In this embodiment, the beam reduction system 8 is used instead of the lens 4 to increase the energy density incident on the KDP crystal 5 , and realize cascaded frequency conversion of frequency doubling stimulated Raman scattering in the KDP crystal 5 .

[0063] In this embodiment, the beam diameter of the fundamental frequency pump light is kept constant during the transmission in the crystal. Compared with the lens 4, the energy density of the fundamental frequency pump light in the crystal transmission process is improved, and it can also be used in the KDP crystal 5 Realize the cascaded frequency conversion of frequency doubling stimulated Raman scattering in .

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Abstract

The invention relates to a laser based on monolithic KDP crystal cascade optical frequency conversion, and a working method thereof. The laser comprises a pumping source, a diaphragm, an attenuation system, a KDP crystal cut by doubling frequency, a first color filter and a second color filter. The monolithic KDP crystal cut by the doubling frequency realizes the cascade optical frequency conversion of the doubling frequency and the stimulated raman scattering, can conveniently perform optical frequency conversion to Nd:YAG (1064nm) or Nd:glass (1053nm) pulse laser, and can output the green light, the yellow-orange light and the red light by using different transmission spectrum filters. The laser can be used as green, yellow and red laser signal lights, and also can be used as a yellow light source to be applied to the laser medical field, the spectroscopy field, the military field, the meteorological field, and so on. The laser is characterized in simple structure, strong stability, low cost, wide application, simple operation, strong practicability, and so on.

Description

technical field [0001] The invention relates to a laser based on a single KDP crystal cascaded optical frequency conversion and a working method thereof, belonging to the technical field of lasers. Background technique [0002] Now, lasers are widely used in all walks of life and are closely related to people's lives. However, the wavelength of the laser is limited, and the most common technical route to obtain a new wavelength is to perform frequency doubling, sum frequency, difference frequency, Optical frequency conversion such as stimulated Raman scattering. Among them, the combination of frequency doubling and stimulated Raman can obtain yellow light, orange light, red light, etc. in visible light. Lasers in the yellow-orange band have important applications in laser medical field, spectroscopy, military, meteorological field, information storage and other fields. In recent years, people have been working on the generation of lasers in the yellow-orange band. At pre...

Claims

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Application Information

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IPC IPC(8): H01S3/10H01S3/30
CPCH01S3/10H01S3/30
Inventor 王正平吴志心许心光孙洵任宏凯张立松
Owner SHANDONG UNIV
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