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Yb: YAG laser amplifier based on dual-wavelength beam-combining single-ended pumping

A laser amplifier and dual-wavelength technology, which is applied to lasers, laser devices, laser components, etc., to achieve the effects of reducing costs, reducing adjustment difficulties, and high beam quality

Pending Publication Date: 2021-08-31
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the currently known and reported Yb:YAG laser amplifiers all use a single wavelength pumping scheme

Method used

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  • Yb: YAG laser amplifier based on dual-wavelength beam-combining single-ended pumping
  • Yb: YAG laser amplifier based on dual-wavelength beam-combining single-ended pumping
  • Yb: YAG laser amplifier based on dual-wavelength beam-combining single-ended pumping

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Embodiment 1

[0044] A Yb:YAG laser amplifier based on dual-wavelength combined beam single-ended pumping, such as figure 1 As shown, the laser amplifier includes a seed light source 12 and a dual-wavelength beam combining single-ended pumping structure;

[0045] The dual-wavelength beam-combining single-ended pump structure includes a 940nm semiconductor laser 1, a first pump coupling lens 2, a second pump coupling lens 3, a first dichroic mirror 4, a second dichroic mirror 9, and Yb arranged sequentially along the optical path: YAG crystal 10, and the third dichroic mirror 11;

[0046] One side of the first dichroic mirror 4 is also sequentially provided with a 969nm semiconductor laser 5, a third pump coupling lens 6, a fourth pump coupling lens 7 and a first reflector 8 along the optical path;

[0047] The pump light output by the 940nm semiconductor laser first passes through the first pump coupling lens 2 and the second pump coupling lens 3 for beam adjustment, and then the 940nm pum...

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Abstract

The invention relates to a Yb: YAG laser amplifier based on dual-wavelength beam combination single-ended pumping. The amplifier comprises a 940nm semiconductor laser, a first pump coupling lens, a second pump coupling lens, a first dichroic mirror, a 969nm semiconductor laser, a third pump coupling lens, a fourth pump coupling lens, a first reflecting mirror, a second dichroic mirror, a Yb: YAG crystal, a third dichroic mirror and a seed light source which are sequentially arranged along a light path. By adopting a 940nm and 969nm dual-wavelength beam combination mode, output lasers of two high-brightness semiconductor lasers are combined into one beam in space, and then the one beam is used as pumping laser to be coupled into a Yb: YAG crystal. According to the invention, the dual-wavelength absorption characteristic of the Yb: YAG crystal is fully utilized, so that double single-end pumping power is provided under the same laser brightness.

Description

technical field [0001] The invention relates to a Yb:YAG laser amplifier based on dual-wavelength combined beam single-end pumping, and belongs to the technical field of laser amplifiers. Background technique [0002] Ytterbium-doped yttrium aluminum garnet (Yb:YAG) crystal has very excellent physical and optical properties, such as high thermal conductivity, low nonlinearity, high damage threshold, etc., so it is widely used as the gain medium of 1.03μm laser amplifier. At present, according to the geometric shape of Yb:YAG crystal, the typical amplifier structures mainly include: rod crystal amplifiers, crystal fiber amplifiers, slab amplifiers, and sheet amplifiers. From the perspective of the pump structure, the end-pump and side-pump structures are usually the main ones. Among them, the efficiency of the end-pumped structure amplifier is very dependent on the brightness of the pump laser. Unlike the Nd:YAG crystal, the Yb:YAG crystal belongs to the quasi-three-level st...

Claims

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Application Information

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IPC IPC(8): H01S3/0933H01S3/08H01S3/10H01S3/16H01S5/40
CPCH01S3/0933H01S5/4012H01S3/1643H01S3/08072H01S3/1001
Inventor 刘兆军王上赵智刚丛振华张行愚
Owner SHANDONG UNIV
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