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Fast-slow axis beam quality homogenizing device of semiconductor laser

A beam quality, laser technology, applied in the field of lasers, to achieve the effect of easy processing and simple structure

Active Publication Date: 2015-08-12
INST OF APPLIED ELECTRONICS CHINA ACAD OF ENG PHYSICS
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Problems solved by technology

Such a beam with extremely asymmetric beam quality on the fast and slow axes cannot be focused by the focusing system into a focal spot with a symmetrical size and a certain depth of focus

Method used

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  • Fast-slow axis beam quality homogenizing device of semiconductor laser
  • Fast-slow axis beam quality homogenizing device of semiconductor laser
  • Fast-slow axis beam quality homogenizing device of semiconductor laser

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Embodiment

[0027] The selected semiconductor laser contains 5 light-emitting points, each light-emitting point has a fast-axis light-emitting area with a size of 1 μm and a slow-axis light-emitting area with a size of 100 μm, and the distance between each light-emitting point is 1000 μm. Energy), slow axis divergence angle is less than 10° (contains 90% energy). use as figure 1 In the beam shaping structure shown, a fast-axis collimator lens with a focal length of 360 μm is used to collimate the semiconductor laser on the fast axis. The spot distribution after collimation is as follows Figure 4 As shown in (mark 11), the remaining divergence angle of the fast axis after collimation is 3mrad, and the spot size in the fast axis direction is 0.5mm. use as figure 2 The right-angle prism group shown rotates the light-emitting point. The right-angled prism A has a right-angled side of 0.5mm and a height of 1mm, and the right-angled prisms B and C have a right-angled side of 0.5mm and a hei...

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Abstract

The invention provides a technical scheme of a fast-slow axis beam quality homogenizing device of a semiconductor laser. Based on the beam total reflection principle, the scheme comprises the following steps: using a rectangular prism spatial combination as a beam rotating component, using a cylindrical lens assembly as Y-direction collimation, and using two-pieces type cylindrical beam-shrinking mirror as an X-direction beam-shrinking component so as to shape the fast-slow axis light beam quality of the semiconductor laser in a homogenizing manner. Through the adoption of the device provided by the invention, the beam rotation is aberration-free, the beam forward direction cannot be changed, and a shaping system is simple in adjustment and easy to operate. A semiconductor laser high-brightness optical fiber coupling output light source researched based on the device can be applied to various fields such as pumping optical fiber lasers, medical treatment and industry processing.

Description

technical field [0001] The invention relates to the technical field of lasers, in particular to a fast and slow axis beam quality homogenization device of a semiconductor laser. Background technique [0002] Due to the advantages of high electro-optical conversion efficiency, good reliability, and miniaturization, semiconductor lasers have been rapidly developed and widely used in laser pumping sources and direct applications, especially as pumping sources for solid-state lasers and fiber lasers. The rapid development of all solid-state lasers. A high-brightness, high-power semiconductor laser pump source is an important basic condition for fiber lasers and solid-state lasers to achieve high efficiency and high power output. [0003] Semiconductor lasers have an asymmetrically distributed output light field. The semiconductor laser presents a high divergence angle of 30°~70° in the direction perpendicular to the PN junction (fast axis direction), but the light-emitting are...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S5/06G02B6/43
Inventor 唐淳余俊宏郭林辉吴华玲颜昊王昭高松信武德勇
Owner INST OF APPLIED ELECTRONICS CHINA ACAD OF ENG PHYSICS
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