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Method for realizing high absorption efficiency of Nd:YAG laser for pumping light

A pump light, high absorption technology, applied in the field of Nd: yag laser, can solve the problem that the spectral line width pump light energy cannot be absorbed, achieve excellent thermal conductivity and photoelectric performance, and improve the effect of energy utilization efficiency

Inactive Publication Date: 2012-07-25
XIDIAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The mismatch between the two in terms of spectral line width will result in about 20-30% of the pump light energy not being absorbed

Method used

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  • Method for realizing high absorption efficiency of Nd:YAG laser for pumping light
  • Method for realizing high absorption efficiency of Nd:YAG laser for pumping light
  • Method for realizing high absorption efficiency of Nd:YAG laser for pumping light

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Experimental program
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Effect test

Embodiment 1

[0030] Such as figure 1 As shown, a Nd: yag laser method for achieving high absorption efficiency of pump light, including a laser diode pump source 1, a laser resonator 12, a first laser medium 4, the first laser medium is Nd: YAG, along In the direction of pump light propagation, there is a second laser medium 5 behind the first laser medium 4, and the second laser medium 5 is Nd:YVO4. The second laser medium 5 is used to absorb the pump light. When all the pump light passes through the first laser medium 4, the pump light power within the first laser medium 4 (Nd: YAG crystal 808.6nm wavelength absorption spectrum) will be completely is absorbed, and the pump light power outside the first laser medium 4 (Nd: YAG crystal absorption spectrum |) enters the second laser medium 5 (Nd: YVO 4 crystal), absorbed by the second laser medium 5.

[0031] When working, the laser diode pump source 1 enters the optical coupling unit 2 with a certain spatial distribution, and injects t...

Embodiment 2

[0034] figure 2 Given another example, it is the same as figure 1 The difference is that a Q-switch 7 is placed inside the output mirror 6 of the resonator, and the Q-switch 7 is used to realize the Q-switch pulse output of the Nd:YAG laser. The role of the second laser medium 5 (Nd: YVO4 medium) is the same as figure 1 exactly the same.

Embodiment 3

[0036] exist image 3 In the first laser medium 4, the optical reflection film is coated on one side of the pump light end face to form a resonant cavity mirror, eliminating the need for figure 1 and figure 2 The resonator mirror 3 in .

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Abstract

The invention relates to a method for realizing high absorption efficiency of an Nd:YAG laser for pumping light, which requires a laser diode pumping source, a laser resonant cavity and laser media Nd:YAG. The method is characterized in that an Nd:YVO4 medium is arranged on the rear of the laser media Nd:YAG along the transmission direction of the pumping light and used for sufficiently absorbing the pumping light, pumping light with the power within a wavelength absorption spectrum of 808.6nm of Nd:YAG crystal is completely absorbed after the pumping light passes through all the laser media Nd:YAG, and pumping light with the power out of the absorption spectrum of the Nd:YAG crystal enters Nd:YVO4 crystal and is absorbed by the Nd:YVO4 crystal. When the laser works, energy absorbed by the two types of crystal can be converted into oscillation laser with identical wavelengths, and high-power laser is outputted. Excellent heat conduction and an excellent photoelectric performance of the media Nd:YAG and the characteristic of broadband absorption of the medium Nd:YVO4 are utilized, the advantages of the media Nd:YAG and the advantages of the medium Nd:YVO4 are combined, and the shortcomings of the media Nd:YAG and the shortcomings of the Nd:YVO4 are overcome. By the aid of the method, the energy utilization rate of the pumping light can be increased by about 20%.

Description

technical field [0001] The invention relates to an end-pumped laser diode pumped solid-state laser, in particular to a Nd:yag laser method for realizing high absorption efficiency of pump light. Background technique [0002] Laser diode solid-state lasers are mainly composed of pump source laser diodes, coupling systems, and resonant cavities. The resonant cavity is the core part of the laser, and the laser medium is the hub to realize the conversion of pump energy into laser energy. The pump source laser diode emits pump light, which acts on the laser medium in the resonant cavity through the coupling system to generate the particle population inversion required for laser oscillation. There are various types of laser media, which are usually selected according to the special requirements of the laser wavelength and physical parameters emitted by the laser. Among them, Nd-doped: YAG is currently the most commonly used laser medium due to its excellent thermal conductivity,...

Claims

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Application Information

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IPC IPC(8): H01S3/16H01S3/07
Inventor 王石语过振蔡德芳李兵斌商继敏
Owner XIDIAN UNIV
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