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Self frequency conversion solid state laser based on neodymium doped gadolinium calcium oxborate crystal

A technology of solid-state lasers and calcium neodymium borate, which is applied in lasers, laser components, phonon exciters, etc., can solve the problems that hinder laser self-frequency doubling crystals from becoming practical, NYAB crystals have poor optical uniformity, and cannot meet the requirements of commercialization, etc. problem, to achieve the effect of low cost, small structure, simple and compact structure

Inactive Publication Date: 2011-05-25
SHANDONG UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But since YAl(BO 3 ) 4 (YAB) and NdAl(BO 3 ) 4 (NAB) has a different crystal structure, resulting in poor optical uniformity of NYAB crystals, making it difficult to grow high-quality NYAB crystals, which cannot meet the requirements of commercialization
Due to Nd:Mg:LiNbO 3 These shortcomings of the NYAB and NYAB crystals hinder the practical use of these two laser self-frequency doubling crystals

Method used

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  • Self frequency conversion solid state laser based on neodymium doped gadolinium calcium oxborate crystal
  • Self frequency conversion solid state laser based on neodymium doped gadolinium calcium oxborate crystal
  • Self frequency conversion solid state laser based on neodymium doped gadolinium calcium oxborate crystal

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Effect test

Embodiment 1

[0054] refer to figure 1 , making a self-variable frequency solid-state laser based on neodymium-doped calcium-gadolinium borate (Nd:GdCOB) crystal.

[0055] In this embodiment, a Nd:GdCOB self-converting crystal 2 with a doping concentration of 5at.% is used, cut in the direction of θ=90°, φ=47.5°, and the two end faces in the light passing direction are polished according to the polishing process of laser crystals. The light-transmitting surface of the self-variable crystal 2 is square, the size of the self-variable crystal 2 is 3×3×5 mm, and the end face of the self-variable crystal 2 is not coated. Self-converting crystal 2 adopts natural cooling method without external cooling device.

[0056] The pumping source 1 adopts a continuous output semiconductor laser diode with an emission wavelength of 808nm, and the pumping method is end pumping. The pumping source 1 adopts a cooling heat dissipation device equipped with a pumping source (commercially available).

[0057] ...

Embodiment 2

[0063] refer to figure 2 , making a self-variable frequency solid-state laser based on Nd:GdCOB crystal.

[0064] The pumping source 1, the coupling component 6, the self-variable frequency crystal 2, the input cavity mirror 3 and the output coupling mirror 4 used in this embodiment, and the composition optical path of the self-variable solid-state laser are the same as those in the first embodiment.

[0065] The difference is:

[0066] (1) The self-converting solid-state laser has an independent input cavity mirror and an output coupling cavity mirror, and a film layer 8 that is antireflective to pump light, fundamental frequency light and frequency conversion light is coated on both ends of the self-conversion crystal 2, to eliminate Fresnel scattering losses.

[0067] (2) Place the self-converting crystal 2 in the crystal refrigeration temperature control device 13, use water cooling as the cooling and heat dissipation method, use the contact type copper heat sink crysta...

Embodiment 3

[0070] refer to image 3 , making a self-variable frequency microchip solid-state laser based on Nd:GdCOB crystal.

[0071] The pump source 1, self-variable frequency crystal 2, crystal cooling and temperature control device 13 used in this embodiment, and the self-variable frequency crystal 2 are installed in the cooling and temperature control device 13, and the optical path of the solid-state laser is the same as that of embodiment 1.

[0072] The difference is:

[0073] (1) The independent input cavity mirror 3 is removed, and a film layer 9 with high transparency to the pump light and high reflection of the fundamental frequency light and the double frequency light is plated on the input end face of the self-converting crystal 2 as the input cavity mirror;

[0074] (2) Remove the independent output coupling cavity mirror 4, and coat the film 10 on the output end face of the self-converting crystal 2 with high reflection of the fundamental frequency light and high transmi...

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Abstract

The present invention relates to a self frequency conversion solid state laser based on neodymium doped gadolinium calcium oxborate crystal, compromising a self frequency conversion crystal composed of NdxGd1-xCa4O(BO3)3 wherein x is from 0.001 to 0.2, a pumping source, and a laser resonator. The self frequency conversion crystal is cut along a direction perpendicular to the frequency conversion phase match direction of the crystal, and two light-through end surfaces of the self frequency conversion crystal are polished; the pumping source is a laser with wave length from 802 to 815 nm, 830nm, or from 868 to 887 nm, and the laser resonator realizes a unity feedback of the fundamental frequency light and a unity output of the frequency conversion light; wherein the laser resonator is set in front of a pumping source output optical path, the self frequency conversion crystal is arranged in the laser resonator, and the pumping mode is an end surface pumping mode or a side surface pumping mode. The self multiplication frequency, self sum frequency, self slip frequency or self parameter oscillation laser output of different fundamental frequency light can be obtained through determining the optimal frequency conversion phase match direction of the crystal in different fundamental frequency wave lengths and designing the corresponding laser cavity mirror membrane transmittance. The solid state laser is small in size, compact in structure, and stable in performance.

Description

technical field [0001] The invention relates to a self-variable frequency solid laser, in particular to a self-variable frequency solid laser based on neodymium-doped calcium gadolinium borate (Nd:GdCOB) crystal. Background technique [0002] With the development of laser technology and its wide application in information storage, biomedicine, laser display, optical research and other fields, the demand for solid-state lasers with different output wavelengths is becoming more and more urgent. Visible wavelength lasers are widely used in full-color display, medical treatment, printing, entertainment and scientific research. At present, the main way to obtain green light output is to use frequency doubling crystals KTP, PPLN or LBO to treat Nd 3+ The 1.06μm laser generated by the ion is frequency-doubled to obtain a 0.53μm green light output. For low and medium power green light output, Nd:YVO is usually used 4 +KTP way to get. Nd:YVO 4 It is glued together with the KTP c...

Claims

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Application Information

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IPC IPC(8): H01S3/16H01S3/06H01S3/109H01S3/08
Inventor 王继扬张怀金王正平于浩海蒋民华许祖彦韩琳王保山宗楠彭钦军
Owner SHANDONG UNIV
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