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Device and method for increasing linearly polarized light output power of neodymium (Nd): yttrium aluminum garnet (YAG) laser

A YAG laser and output power technology, applied in lasers, laser parts, phonon exciters, etc., can solve the problems of affecting the output power of solid-state lasers and increasing the thermal depolarization effect, so as to reduce the cost of the laser and reduce the additional loss. , The effect of easy engineering application

Inactive Publication Date: 2012-07-11
BEIJING UNIV OF TECH
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Problems solved by technology

For lasers that require linearly polarized beams to operate, such as electro-optic Q-switching, frequency doubling, and external beam modulation, the thermal depolarization effect caused by thermally induced birefringence will increase significantly, seriously affecting the output power of solid-state lasers

Method used

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  • Device and method for increasing linearly polarized light output power of neodymium (Nd): yttrium aluminum garnet (YAG) laser
  • Device and method for increasing linearly polarized light output power of neodymium (Nd): yttrium aluminum garnet (YAG) laser
  • Device and method for increasing linearly polarized light output power of neodymium (Nd): yttrium aluminum garnet (YAG) laser

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0027] Such as figure 1 Shown, the present invention is by semiconductor laser (1), 808nm anti-reflection 1064nm total reflection mirror (2), Nd:YAG crystal rod (3), polarization beam splitter prism (4), T=50% output mirror (5), The method of the present invention will be further described below in combination with the thermal stress birefringence effect of [111] and [100] direction cut Nd:YAG crystals, and the thermal depolarization effect generated therefrom.

[0028] For lasers that require linearly polarized beams to operate, such as electro-optic Q-switching, frequency doubling, and external beam modulation, etc., it is necessary to add a polarizing beam splitter and other devices that can generate linearly polarized light in the resonator, such as figure 2 shown. When the [111] direction cut Nd:YAG crystal is used as the gain medium of...

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Abstract

The invention relates to a device and a method for increasing the linearly polarized light output power of a neodymium (Nd): yttrium aluminum garnet (YAG) laser. According to the method, a Nd: YAG crystal bar which is cut in [100] direction is used, the crystal bar is rotated for proper direction, and the output power of linearly polarized light is increased. The method can be widely applied to the Nd: YAG laser with a semiconductor end face; and the Nd: YAG laser can be ensured to have the characteristics of high linearly polarized light power, low hot depolarized loss, simplicity in operation and project application and the like.

Description

technical field [0001] The invention relates to a semiconductor end-pumped laser that cuts Nd:YAG crystal rods in the [100] direction, a device and method for finding the maximum output power of linearly polarized light by rotating the Nd:YAG crystal rods, and belongs to the field of laser manufacturing. Background technique [0002] The polarization state of the output laser of the semiconductor end-pumped Nd:YAG laser is related to the polarization state of the pump light. When the polarization state of the pump light is changed, the polarization state of the output laser is also changed. The polarization state of the end pump light of the Nd:YAG laser is consistent with that of the output laser. In 2004, N.V.Kravtsov et al. used Nd:YAG crystals with [111] cutting direction as the gain medium of semiconductor end-pumped lasers, and carried out theoretical and experimental studies on the consistent relationship between the polarization state of the pump light and the polari...

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Application Information

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IPC IPC(8): H01S3/16H01S3/06H01S3/10
Inventor 李强孙哲惠勇凌雷訇姜梦华
Owner BEIJING UNIV OF TECH
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