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Diode pumped solid-state laser with improved pump light absorption

A solid-state laser, pump laser technology, applied in lasers, laser parts, phonon exciters, etc., can solve the problem of complex mode matching, and achieve the effect of reducing production cost and increasing tolerance

Inactive Publication Date: 2012-05-09
KONINK PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For high-power pump diodes, mode matching becomes more complicated, as an increase in pump power is accompanied by a degradation in beam quality or M2 factor, respectively

Method used

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  • Diode pumped solid-state laser with improved pump light absorption
  • Diode pumped solid-state laser with improved pump light absorption
  • Diode pumped solid-state laser with improved pump light absorption

Examples

Experimental program
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Embodiment Construction

[0037] figure 1 A first embodiment of a diode-pumped solid-state laser device 1 is shown. A diode-pumped solid-state laser device 1 comprises a pump laser diode 3 and a solid-state laser 7 with a laser crystal 11 . According to a preferred embodiment of the present invention, a blue laser diode is used as the pumping light source. The solid-state laser 7 is designed to emit laser light at a wavelength different from that of the laser light emitted from the pump laser diode 3 . For example, solid-state lasers can be designed to emit in the green wavelength range or in the red wavelength range if Pr:YLF crystals are used.

[0038] The cavity 71 of the solid state laser 7 is terminated by a wavelength selective mirror 9, eg a dielectric mirror, and an output coupler 14. The output coupler 14 is translucent to the laser light 71 generated by the solid state laser 7 . For example, the output coupler can be designed to transmit a certain % share of the laser radiation and reflec...

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PUM

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Abstract

For a diode pumped solid-state laser, measures to improve the pump light absorption in anisotropic crystals are proposed. The proposed measures reduce the dependency of the pump light absorption on the diode current and the diode temperature as well as on the detuning of the pump diode from the absorption line. These measures include sending the pump radiation twice through the crystal, placement of the laser crystal in an orientation that does not exhibit the optimum absorption and the use of a retarder.

Description

technical field [0001] The present invention relates generally to the field of solid-state lasers, and more particularly to diode-pumped solid-state lasers. Background technique [0002] Many solid-state lasers are implemented with narrow emission lines corresponding to 4f-4f transitions in rare earth ions. Furthermore most of these systems are also characterized by narrow and weak absorption bands corresponding to 4f-4f transitions in rare earth ions. Efficient diode pumping of these materials is achieved by a good match of the pump diode emission wavelength to the ion's absorption line, which can be achieved by proper selection of the pump diode and good tuning and stabilization of the diode temperature. [0003] Diode-pumped solid-state lasers (DPSSL) are now mostly Nd:YAG or Nd:YVO 4 Lasers that emit at infrared wavelengths and are used eg in medical applications or material processing applications. These applications require low to medium sized volumes of laser sourc...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/0941H01S3/16G02F1/00H01S3/08
CPCH01S3/08059H01S3/1653H01S3/09415H01S3/094084H01S3/1645H01S3/1613H01S3/1022H01S3/1673H01S3/08054
Inventor U. 魏希曼U. 马肯斯
Owner KONINK PHILIPS ELECTRONICS NV
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