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Optical beam parameter product symmetrization device of semiconductor laser array fast and slow axis

A technology of laser array and parameter product, applied in the field of laser technology application, can solve problems such as difficult assembly and difficult adjustment

Inactive Publication Date: 2008-07-16
JIAXING DAHE LASER EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Similar to the above method, there is also the patent US5986794 invented by Laserline Company, which also has the defects of difficult assembly and difficult adjustment

Method used

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  • Optical beam parameter product symmetrization device of semiconductor laser array fast and slow axis
  • Optical beam parameter product symmetrization device of semiconductor laser array fast and slow axis
  • Optical beam parameter product symmetrization device of semiconductor laser array fast and slow axis

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0065] For a one-dimensional array, its device includes a semiconductor laser one-dimensional array 1, the first microlens array 2 for collimating the fast and slow axes, the first flat glass stack A and the second flat glass stack B, and consists of a cylindrical lens 16 and a spherical lens 17. The focus lens group, as shown in Figure 1. In the figure: x is the direction of the slow axis of the one-dimensional array, y is the direction of the fast axis of the one-dimensional array, and z is the beam transmission direction. The first stack of flat glass A and the second stack of flat glass B are composed of 5 pairs of glass plates stacked together in sequence along the thickness direction of the glass plates, wherein each pair of glass plates includes two identical right-angled triangles. Glass plate, two right triangle glass plates are placed on the same level, so that the light beam emitted from the hypotenuse of the previous triangular glass plate can be incident on the hy...

Embodiment 2

[0073] The difference between this embodiment and Embodiment 1 is that the first flat glass stack A and the second flat glass stack B adopt the method of changing the size, and the other structures are completely the same.

[0074] The principle of changing the size method: the total length L of each pair of triangular glass plates is constant, by changing the length of the triangle base but keeping the bottom angle unchanged, so that the propagating light beam is transmitted between each pair of triangular glass plates despite the same refraction angle Different distances result in different offsets, as shown in Figure 9. For the one-dimensional array, the shaping principle of the method of changing the size is the same as that of the method of changing the angle in Embodiment 1: the light beam 3 collimated by the fast and slow axis collimating microlens is vertically incident on the triangular plate glass stack A2, and the light beam is divided into five parts and A refracti...

Embodiment 3

[0076] The difference between this embodiment and Embodiments 1 and 2 is that the first flat glass stack A and the second flat glass stack B adopt the distance changing method, and the other structures are identical.

[0077] The principle of changing the distance method: all the triangular glass plates in each group in the first flat glass stack A and the second flat glass stack B are exactly the same, and the beam is generated by changing the relative displacement S of each pair in the horizontal direction. Different offsets, as shown in Figure 13. For the one-dimensional array, the shaping principle of the method of changing the distance is the same as that of the method of changing the angle and the method of changing the size in Embodiments 1 and 2: the light beam 3 collimated by the fast and slow axis collimating microlens is vertically incident on the triangular plate glass pile A3, and the light beam It is divided into five parts and a refraction offset is generated in...

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Abstract

The invention relates to a homogenization device of a product of the beam parameters of a semiconductor laser array fast-slow shaft, belonging to the application field of laser technology and including a group of semiconductor laser array fast-slow shaft aligning micro-lens unit, a flat glass pile A, B and a focusing lens set. The light passing through the fast-slow shaft aligning micro-lens vertically injects on the flat glass pile A, a beam is divided into a plurality of portions and generates refraction excursion in the flat glass corresponding to each beam to obtain linear beams distributed in a ladder shape along the direction of the fast shaft of the laser array. The ladder shape linear beams pass through the flat glass pile B and the beams are led to generate reflection excursion along the direction of the slow shaft of the array and are further redistributed as linear beams according to a same beam recombining principle; consequently the beams given out by the semiconductor laser array have a more approximate beam parameter product on the fast-slow shaft, namely, a balanced beam quality in the fast-slow shaft direction. Finally, a uniform focusing spot with high power density and brightness in the fast-slow shaft direction can be obtained by the focusing of the focusing lens set.

Description

technical field [0001] The invention relates to beam shaping, in particular to a semiconductor laser array fast and slow axis beam parameter product homogenization device, which belongs to the application field of laser technology. Background technique [0002] The semiconductor laser one-dimensional array is referred to as Bar. It is composed of multiple light-emitting units. The divergence angle is 50-60 degrees, and the divergence angle on the slow axis is about 5-10 degrees. The semiconductor one-dimensional array is precisely composed of a plurality of such light-emitting units integrated along the direction parallel to the active layer, with a length of 10 mm. The semiconductor two-dimensional array is referred to as the semiconductor stack, which is integrated by multiple Bars along the vertical direction of the active layer, and can be divided into close-packed stacks and non-close-packed stacks according to the distance between the Bars. For a one-dimensional arra...

Claims

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Application Information

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IPC IPC(8): G02B27/09H01S5/40
Inventor 王智勇许春晓曹银花
Owner JIAXING DAHE LASER EQUIP
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