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Device and method for improving linear polarization output power of neodymium:yttrium aluminum garnet (Nd:YAG) laser

An output power and laser technology, applied in lasers, laser parts, phonon exciters, etc., can solve the problems affecting the output power, birefringence, thermal depolarization effect of solid-state lasers, etc., and achieve easy engineering application, output The effect of increasing power and avoiding additional losses

Inactive Publication Date: 2011-11-16
BEIJING UNIV OF TECH
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Problems solved by technology

[0002] The emission spectrum of the semiconductor laser matches the absorption spectrum of the solid gain medium to a high degree, but as the pumping power increases, the thermal effect of the laser medium becomes more and more obvious, causing thermally induced birefringence and other phenomena
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 improving linear polarization output power of neodymium:yttrium aluminum garnet (Nd:YAG) laser
  • Device and method for improving linear polarization output power of neodymium:yttrium aluminum garnet (Nd:YAG) laser
  • Device and method for improving linear polarization output power of neodymium:yttrium aluminum garnet (Nd:YAG) laser

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Embodiment Construction

[0020] Such as figure 1 As shown, the present invention is composed of a total reflection mirror (1), a polarizing beam splitter (2), a semiconductor laser pumping module (3), a laser medium (4) and an output mirror (5), and [111] and [ The thermal stress birefringence effect of Nd:YAG crystal cut in the direction of 100], and the thermal depolarization effect generated therefrom will further illustrate the method of the present invention.

[0021] When the polarizing beam splitter is not added, the semiconductor laser pumps the [100] direction to cut the Nd:YAG crystal rod, and generates 1064nm laser light in any polarization state. 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. For Nd:YAG crystals cut in the [100] dire...

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Abstract

The invention relates to a device and a method for improving the linear polarization output power of a rod-like neodymium:yttrium aluminum garnet (Nd:YAG) laser. In the method, compared with a conventional Nd:YAG crystal rod cut in a direction [111], the Nd:YAG crystal rod cut in the direction [100] by a lateral pump of a semiconductor laser improves the output energy of linearly polarized light in fit with a proper linear polarization direction. The method provided by the invention can be widely used for the all-solid state rod-like Nd:YAG laser; and the all-solid state rod-like Nd:YAG laser can be ensured to have the characteristics of high linearly polarized light power, low thermally induced depolarization loss, operational simplicity and the like, and is easy to apply to engineering.

Description

technical field [0001] The invention relates to a device and method for finding the maximum output power of linearly polarized light by using a semiconductor laser side pumping a Nd:YAG crystal rod cut in the [100] direction and rotating a polarizing beam splitter, which belongs to the field of laser manufacturing. Background technique [0002] The emission spectrum of the semiconductor laser matches the absorption spectrum of the solid gain medium to a high degree, but as the pumping power increases, the thermal effect of the laser medium becomes more and more obvious, causing thermally induced birefringence and other phenomena. 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. In order to reduce the influence of ther...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/06H01S3/101
Inventor 李强孙哲惠勇凌雷訇姜梦华
Owner BEIJING UNIV OF TECH
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