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Method for inclined square prism stack to implement strip array semiconductor laser device beam shaping

A rhomboid prism and beam shaping technology, applied in prisms, optics, instruments, etc., can solve problems such as inconvenient design of adjustment mechanical parts, complicated fabrication of micro-chip prism stacks, and cost reduction, achieving shaping efficiency and system performance stability Improvement, compact structure, and system cost reduction

Inactive Publication Date: 2008-11-12
INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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  • Abstract
  • Description
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  • Application Information

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Problems solved by technology

However, the above-mentioned stripe shaping methods all have certain shortcomings. For example, the stepped reflector performs two 90-degree spatial deflections on the optical axis of the system, causing the shaping elements to be independent of each other in space, which brings inconvenience to the adjustment and mechanical parts design. ; The catadioptric shaping method of the prism group deflects the direction of the optical axis more, and there is also the problem of inconvenient adjustment; the micro-chip prism stack is not only complicated to manufacture, but also requires considerable alignment and gluing accuracy between the prisms, which is not conducive to cost reduction

Method used

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  • Method for inclined square prism stack to implement strip array semiconductor laser device beam shaping
  • Method for inclined square prism stack to implement strip array semiconductor laser device beam shaping
  • Method for inclined square prism stack to implement strip array semiconductor laser device beam shaping

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Embodiment 1

[0028] In this embodiment, the shaping process of coupling the bar array semiconductor laser beam with the optical fiber with a core diameter of 800 μm and a numerical aperture of 0.37 is realized by the method of the present invention. The design process is as follows:

[0029] (1) After the fast and slow axes of the strip semiconductor laser 1 are collimated, the light spot size in the slow axis direction is about 10mm, and the number of deflection times of the slow axis light spot is N=2 times by using a rhombic prism, and aligned along the fast axis direction; the shaping system needs A parallel flat plate 8 and a front group rhombic prism 6 and a rear group rhombic prism 7, such as Figure 4 Shown; For the laser wavelength (such as 808nm) near the visible light, you can choose cheap K9 glass to make parallel plate 8, front group rhomboid prism 6 and rear group rhomboid prism 7. In this example, the width of the parallel plate 8 is selected as 6 mm. In order to ensure that...

Embodiment 2

[0036] (1) In the present embodiment, after the fast and slow axes of the strip semiconductor laser are collimated, the spot size in the slow axis direction is about 12mm, and the slow axis spot is deflected N=3 times by using a stack of orthorhombic prisms, and aligned along the fast axis direction; The system needs a parallel flat plate 15 and a reflective prism pile composed of two front group rhomboidal prisms and two rear group rhomboidal prisms; as shown in Figure 6, the two front group rhomboidal prisms respectively Prism 11 and the second rhombic prism 12 of front group, two rear group rhomboidal prisms are respectively the first rhombic prism 13 of rear group and the second rhombic prism 14 of rear group; Similar to embodiment 1, parallel plate 15, front The first rhombohedral prism 11 of the group and the second rhombohedral prism 12 of the front group, the first rhombohedral prism 13 of the rear group and the second rhombohedral prism 14 of the rear group are all mad...

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Abstract

The invention discloses a method for realizing the light beam reshaping of a striped array semiconductor laser by an oblique square prism pile, which is characterized in that (1) the parameters and parallel plates of the systems of the front group or the rear group of the oblique square prism pile are determined according to the requirements of luminous spot folding; (2) the oblique square prism and the parallel plates needed are processed by the optical flat parts processing technology and then bonded to form an overall reshaping component; (3) the bonded oblique square prism pile is placed in quasi-parallel light which is collimated by a fast axis and a slow axis of the striped array semiconductor laser respectively; the luminous spot is rotates from left to right around a perpendicular of a base of the laser to lead the deflected luminous spot to align with the direction of the fast axis; (4) the emergent luminous spot after the reshaping emerges along the direction in parallel to an optical axis; a focusing lens is added at a proper position of the emergent light and a reshaped light beam is coupled into an optical fiber. Compared with the traditional method, the method for realizing the light beam reshaping of the striped array semiconductor laser by the oblique square prism pile of the invention has the advantages of simple design, compact structure, convenient adjustment, low cost, etc.

Description

technical field [0001] The invention relates to a method for realizing beam shaping of a striped semiconductor laser by using a rhomboid prism stack. Background technique [0002] High-power semiconductor lasers (Laser Diode, LD) with pigtail output have been widely used in the fields of medical treatment, material processing, pumping of solid-state lasers and fiber lasers, military, printing and printing. Among them, the coupling of strip semiconductor lasers (LD bar) and optical fibers is a field that has been studied more. Due to many limitations, it cannot be made to be infinitely long in the horizontal direction, so the current bar array semiconductor laser is generally about 1cm long, and the continuous output power is generally <100W. [0003] The main characteristics of the output beam of semiconductor lasers are that in the horizontal direction (customarily called "slow axis"), the beam divergence angle is small (about 8-10 degrees, FWHM), and the light-emitting...

Claims

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Application Information

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IPC IPC(8): G02B27/09G02B27/48G02B5/04
Inventor 郑国兴杜春雷周崇喜谢伟民
Owner INST OF OPTICS & ELECTRONICS - CHINESE ACAD OF SCI
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