Composite crystal and high-power double-end pumping device

A technology of composite crystals and crystals, applied in the field of lasers, can solve the problems that crystals cannot adapt to thermal effects, crystal cracks, etc., and achieve the effects of alleviating thermal effects, low heat generation performance, and good thermal conductivity and mechanical properties.

Pending Publication Date: 2022-07-08
CHANGZHOU INNO MACHINING +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art, provide a composite crystal and a high-p

Method used

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  • Composite crystal and high-power double-end pumping device
  • Composite crystal and high-power double-end pumping device
  • Composite crystal and high-power double-end pumping device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] like figure 1 As shown, a composite crystal 2 is formed by bonding multiple sections of Nd:YAG crystals with different doping concentrations; the composite crystal 2 includes

[0059] intermediate crystal 20; and

[0060] Multiple pairs of side crystals, each pair of side crystals is symmetrically arranged on both sides of the middle crystal 20;

[0061] The doping concentration distribution of the composite crystal 2 is as follows: the edge gradually increases toward the middle direction, that is, the side crystal concentration of the two edges is the smallest, and the middle crystal 20 concentration is the largest.

[0062] In this embodiment, the number of the side crystals is two pairs, which are:

[0063] A pair of first side crystals 21 are symmetrically arranged on both sides of the middle crystal 20;

[0064] A pair of second side crystals 22 are symmetrically arranged on both sides of the first side crystal 21;

[0065] The doping concentration of the inter...

Embodiment 2

[0075] This embodiment is based on the first embodiment, and at the same time is different from the first embodiment,

[0076] In this implementation, if figure 2 As shown, the number of the side crystals is three pairs, which are:

[0077] A pair of first side crystals 21 are symmetrically arranged on both sides of the middle crystal 20;

[0078] A pair of second side crystals 22 are symmetrically arranged on both sides of the first side crystal 21;

[0079] A pair of third side crystals 23 are symmetrically arranged on both sides of the second side crystal 22;

[0080] The doping concentration of the intermediate crystal 20 is 0.4-0.9%;

[0081] The doping concentration of the first side crystal 21 is 0.2-0.4%;

[0082] The doping concentration of the second side crystal 22 is 0.03-0.2%;

[0083] The doping concentration of the third side crystal 23 is 0%.

[0084] In this embodiment, compared with the first embodiment, a pair of third side crystals 23 is added, and t...

Embodiment 3

[0087] like Figure 4 shown, a high-power double-terminal pumping device based on Nd:YAG crystal, including

[0088] Crystal, which adopts the composite crystal 2 of Embodiment 1 or Embodiment 2;

[0089] The first pump source 31 is located on one side of the crystal, and is suitable for emitting laser light toward the crystal from this side, with a pump power of 150-500W and a wavelength of 808nm;

[0090] The second pump source 32 is located on the other side of the crystal, and emits laser light from this side toward the crystal, with a pump power of 150-500W and a wavelength of 885nm;

[0091] at least one first pump coupling lens 41, located between the first pump source and the crystal;

[0092] at least one second pump coupling lens 42, located between the second pump source and the crystal;

[0093] The first dichroic mirror 51 is located between the first pump source 31 and the crystal, and the light emitted by the first pump source 31 enters the crystal after bein...

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Abstract

The invention relates to a composite crystal which is formed by bonding a plurality of Nd: YAG crystals with different doping concentrations. The doping concentration of the composite crystal is gradually increased from the edge to the middle, that is, the concentration of the side crystal at the edges of the two sides is minimum, and the concentration of the middle crystal is maximum. The crystal has very good heat conduction and mechanical properties, and is especially suitable for high-power pumping. The high-power double-end pumping device comprises the composite crystal. A first pumping source; a second pumping source; the reflectivity of the first dichroic mirror is greater than 99.5%, and the transmittance of the first dichroic mirror is greater than 95%; the reflectivity of the second dichroic mirror is greater than 99.5%, and the transmittance is greater than 95%; the transmittance of the third dichroic mirror is greater than 95%; and the transmittance of the fourth dichroic mirror is greater than 95%. The double-end-face pump provided by the invention can be suitable for high-power pumping.

Description

technical field [0001] The invention relates to the technical field of lasers, in particular to a composite crystal and a high-power double-end pumping device. Background technique [0002] The double-end pump structure is a commonly used pump structure for laser oscillators and amplifiers. The mature gain medium that can be used for double-end pumping is Nd:YVO 4 Crystal, Yb:YAG crystal and Nd:YAG crystal, the existing patent 202110757616.3 and patent 202110339538.5 are based on Nd:YVO 4 The double-pumped structures of crystals and Yb:YAG crystals are described. [0003] In fact, these three laser gain media have their own advantages and disadvantages, Nd:YVO 4 The crystal gain is high, but the crystal thermal conductivity and mechanical properties are poor, suitable for low power work, generally a single Nd:YVO 4 The pump power of the crystal does not exceed 200W; the Yb:YAG crystal has a wide gain spectrum and is often used to amplify femtosecond lasers, but its quasi-...

Claims

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Application Information

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IPC IPC(8): H01S3/07H01S3/06H01S3/094H01S3/16
CPCH01S3/07H01S3/0602H01S3/1611H01S3/1643H01S3/1698H01S3/094038
Inventor 晏恒峰赵晓杰
Owner CHANGZHOU INNO MACHINING
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