Optical system for improving laser beam quality

A beam quality and optical system technology, applied in the field of optical systems, can solve the problems of high power value and poor beam quality, etc., and achieve the effect of comprehensive beam quality improvement and good beam quality

Inactive Publication Date: 2016-07-13
WUHU ANRUI LASER TECH CO LTD
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  • Claims
  • Application Information

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Problems solved by technology

Although the current semiconductor beam combining technology can combine the output beams of multiple semiconductor lasers into one, but due to the huge differe

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  • Optical system for improving laser beam quality
  • Optical system for improving laser beam quality

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Example Embodiment

[0022] Example 1:

[0023] The optical system of the present invention is such as figure 1 Shown.

[0024] The preferred specific embodiments of the present invention will be described below with reference to the accompanying drawings:

[0025] Using 975nm, output power of 10W, output bar width Lx = 150 microns, optical mode field thickness Ly = 1 micron semiconductor laser die 1, its fast axis (y axis) divergence angle is 70 °, slow axis (x axis) The divergence angle is 18°, and it is installed on the aluminum nitride transition heat sink and the copper heat sink. The original BPP of the semiconductor laser die 1 is 0.34 mm·mrad on the y-axis and 9.8 mm·mrad on the slow x-axis. The first fast axis collimating lens 2 is used to partially collimate the fast axis of the semiconductor laser die 1, so that the image of the light emitting surface of the die basically coincides in the fast axis direction and the slow axis direction, forming a unified image. The y divergence angle is 30°...

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Abstract

The invention discloses an optical system for improving beam quality of a semiconductor laser.According to the optical system, a semiconductor laser tube core is subjected to the processes that 1, the light-emitting area of the semiconductor laser tube core is amplified through an optical amplification element; 2, the light-emitting area is segmented, and each segment is subjected to optical conversion of 90-degree rotation through 90-degree optical rotating elements; 3, each segment is subjected to spatial translation through optical translation elements, so that the segments can be closer to one another, and gaps among the segments are reduced; 4, an image of the light-emitting area is subjected to proper linear shrinkage through an optical shrinkage element, and adapted linear sizes and divergence angles are output.By means of the optical system, the beam parameter product (BPP) of the beam output by the semiconductor laser is effectively reduced, beam quality is improved, and a powerful technological path is provided for manufacturing a high-power semiconductor pump laser and a high-power direct semiconductor laser system.

Description

technical field [0001] The invention relates to an optical system capable of improving the beam quality, in particular to an optical system for improving the beam quality of a semiconductor laser. Background technique [0002] With the application of semiconductor high-power laser technology in fiber laser pumping and direct semiconductor lasers, semiconductor lasers are required to output higher power and have better beam quality. In a high-power fiber laser system, the greater the power of the semiconductor pump laser, the fewer the number of branches of the fiber combiner required, and the simpler the system structure, it is easier to manufacture and maintain. In high-power direct semiconductor lasers, it is necessary to combine the beams of as many semiconductor lasers as possible, and at the same time require the beam quality to be as good as possible. But the current difficulty lies in that the slow axis (horizontal) direction is relatively wide in the light-emitting ...

Claims

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Application Information

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IPC IPC(8): G02B27/09
CPCG02B27/0916G02B27/0927G02B27/0955G02B27/0966G02B27/0972
Inventor 李丰黄伟杨立梅
Owner WUHU ANRUI LASER TECH CO LTD
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