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Up-conversion excitation unit and laser thereof

A conversion unit and laser technology, applied in the field of lasers, can solve problems such as low laser efficiency, and achieve the effects of improving laser efficiency, reducing overflow loss, and improving conversion efficiency

Active Publication Date: 2021-11-19
THE HONG KONG POLYTECHNIC UNIV SHENZHEN RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an up-conversion excitation unit, aiming to solve the technical problem of low laser efficiency of existing up-conversion lasers

Method used

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  • Up-conversion excitation unit and laser thereof
  • Up-conversion excitation unit and laser thereof
  • Up-conversion excitation unit and laser thereof

Examples

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Embodiment 1

[0051] An up-conversion laser, comprising: a total reflection mirror with a refractive index of 100% and a non-total reflection mirror with a refractive index of 95%, and an up-conversion unit arranged between the total reflection mirror and the non-total reflection mirror; The up-conversion unit consists of 40SiO 2 -13Al 2 o 3 -10Na 2 CO 3 -20BaF 2 -4LaF 3 A glass carrier and an up-conversion material distributed inside the glass carrier, the up-conversion material including Ba 2 LaF 7 Nanocrystalline carrier and Yb doped in nanocrystalline carrier 3+ and Tm 3+ Rare earths; up-conversion materials are precipitated by annealing at 680°C for 1 hour. Among them, compared to Ba 2 LaF 7 , Yb 3+ and Tm 3+ The doping percentage (compared to Ba 2 LaF 7 ) are 90%, 3% respectively. The up-conversion excitation unit is a cuboid, and the vertical distance between the two opposite sides of the total reflection mirror and the non-total reflection mirror varies from more tha...

Embodiment 2

[0053] An up-conversion laser, comprising: a total reflection mirror with a refractive index of 100% and a non-total reflection mirror with a refractive index of 95%, and an up-conversion unit arranged between the total reflection mirror and the non-total reflection mirror; The up-conversion unit consists of 40SiO 2 -13Al 2 o 3 -10Na 2 CO 3 -20BaF 2 -4LaF 3 A glass carrier and an up-conversion material distributed inside the glass carrier, the up-conversion material including Ba 2 LaF 7 Nanocrystalline carrier and Yb doped in nanocrystalline carrier 3+ and Tm 3+ Rare earths; up-conversion materials are precipitated by annealing at 670°C for 1 hour. Among them, compared to Ba 2 LaF 7 , Yb 3+ and Tm 3+ The doping percentage (compared to Ba 2 LaF 7 ) are 90%, 3% respectively. The up-conversion excitation unit is a cuboid, and the vertical distance between the two opposite sides of the total reflection mirror and the non-total reflection mirror varies from more tha...

Embodiment 3

[0055] An up-conversion laser, comprising: a total reflection mirror with a refractive index of 100% and a non-total reflection mirror with a refractive index of 95%, and an up-conversion unit arranged between the total reflection mirror and the non-total reflection mirror; The up-conversion unit consists of 40SiO 2 -13Al 2 o 3 -10Na 2 CO 3 -20BaF 2 -4LaF 3 A glass carrier and an up-conversion material distributed inside the glass carrier, the up-conversion material including Ba 2 LaF 7 Nanocrystalline carrier and Yb doped in nanocrystalline carrier 3+ and Tm 3+ Rare earths; up-conversion materials are precipitated by annealing at 660°C for 1 hour. Among them, compared to Ba 2 LaF 7 , Yb 3+ and Tm 3+ The doping percentage (compared to Ba 2 LaF 7 ) are 90%, 3% respectively. The up-conversion excitation unit is a cuboid, and the vertical distance between the two opposite sides of the total reflection mirror and the non-total reflection mirror varies from more tha...

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Abstract

The invention belongs to the technical field of lasers, and particularly relates to an up-conversion excitation unit which comprises a total reflection mirror and a non-total reflection mirror which are oppositely arranged in parallel, and an up-conversion unit arranged between the total reflection mirror and the non-total reflection mirror. The up-conversion unit comprises a microcrystal carrier and an up-conversion material distributed in the microcrystal carrier. According to the up-conversion excitation unit provided by the invention, the total reflection mirror and the non-total reflection mirror are sequentially introduced to the two opposite sides of the up-conversion unit, so that the absorption efficiency of the up-conversion material in the cavity to incident light waves is improved, the conversion efficiency of the up-conversion material to the light waves is improved, the laser emission efficiency of the up-conversion excitation unit is improved, and the overflow loss of the excitation light source is reduced.

Description

technical field [0001] The invention belongs to the technical field of lasers, and in particular relates to an up-conversion excitation unit and an up-conversion laser. Background technique [0002] In recent years, up-conversion lasers have attracted much attention because they can convert low-energy photons into high-energy photons, especially the ability to convert infrared light into visible light and reach a practical level. It can be used not only for photobiological imaging, but also for high-energy deep ultraviolet laser with tunable wavelength, especially for ultraviolet sterilization, communication, etc. However, with the discovery of materials, the huge problem facing up-conversion materials is how to improve the luminous efficiency. The luminous efficiency of current up-conversion materials is low, especially for deep-ultraviolet lasers, whose luminous efficiency is generally lower than 1%, which will obviously limit its application, resulting in the stagnation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/094H01S3/00
CPCH01S3/094092H01S3/0092
Inventor 王婷余兆丰
Owner THE HONG KONG POLYTECHNIC UNIV SHENZHEN RES INST
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