Laser device

A laser device, laser diode technology, applied in lasers, laser welding equipment, semiconductor lasers, etc., can solve problems such as beam leakage, and achieve the effect of reducing diameter

Inactive Publication Date: 2019-05-03
SHIMADZU SEISAKUSHO CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, even if a beam having a beam diameter larger than the core diameter of the optical fiber is incident on the core, the beam leaks into the cladding.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] Below, while referring to the attached Figure 1 A laser device according to an embodiment of the present invention will be described in detail.

[0043] (basic structure of the present invention)

[0044] First, the basic configuration of the laser device of the present invention will be described. figure 1 It is a figure which shows the structure of the unit 12 which consists of the collimator lens holder 11-1 and the LD holder 10-1 in the laser apparatus concerning embodiment of this invention. figure 2 It is an overall configuration diagram of a laser device according to an embodiment of the present invention.

[0045] The laser device is equipped with: a plurality of laser diodes 10; a plurality of collimating lenses 11 (corresponding to the optical element of the present invention), which is set corresponding to the plurality of laser diodes 10; a plurality of units 12, which are connected to the plurality of laser diodes 10 is arranged correspondingly, is to f...

Embodiment 2

[0075] The spectral linewidth of the lateral multimode laser diode 10 is wider than the spectral linewidth of the lateral single-mode laser diode 10 . In applications requiring high intensity and narrow spectral linewidth, such as light sources for fluorescence excitation, it is necessary to improve the spectral linewidth. Therefore, the laser device according to the second embodiment of the present invention is characterized in that the spectral linewidth is improved by using an aperture member with a diffraction grating.

[0076] Figure 10 (a) is a diagram in which a diaphragm member 21 d with a diffraction grating is provided before the collimator lens 11 in the laser device according to Example 2 of the present invention. Figure 10 (b) is a diagram in which the aperture member 33 with a diffraction grating is provided after the collimator lens 11 in the laser device according to the second embodiment of the present invention.

[0077] Such as Figure 10 As shown in (a...

Embodiment 3

[0082] Figure 11 It is a configuration diagram of a laser device using a pinhole according to Example 3 of the present invention. Figure 11 The characteristic feature is that the laser device according to the third embodiment of the present invention is provided with a condenser lens 34 , a pinhole 35 , and a collimator lens 36 after the collimator lens 11 .

[0083] The condensing lens 34 condenses the light beam collimated by the collimator lens 11 to the hole PH formed in the pinhole 35 . Pinhole 35 utilizes hole PH to remove high M 2 ingredients, only take out the low M 2 Components are emitted to the collimator lens 36 . The collimating lens 36 is only for the low M 2 The components of the beam are collimated.

[0084] Thus, according to the laser device using the pinhole of the third embodiment, the same effect as that of the laser device of the first embodiment can be obtained.

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PUM

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Abstract

Provided is a laser device wherein a plurality of optical elements are provided correspondingly to a plurality of laser diodes, and collimate a plurality of beams emitted from the plurality of laser diodes. A plurality of selective transmission elements are provided correspondingly to the plurality of optical elements, and selectively transmit beams emitted from the plurality of laser diodes or beams emitted from the plurality of optical elements except for the outer periphery of the beams. One or more light traveling direction-control members control the light traveling directions of the plurality of beams having passed through the plurality of optical elements and the plurality of selective transmission elements, in order to move the plurality of beams to the vicinity of the optical axisof the fiber. A light-condensing unit condenses the plurality of beams emitted from the one or more light traveling direction-control members to the fiber.

Description

technical field [0001] The invention relates to a laser device used in laser processing, laser welding, laser marking and the like. Background technique [0002] There is known a laser device that couples light beams emitted from a plurality of laser diodes (LDs) to a single fiber core to obtain high output from the fiber. [0003] Patent Document 1 describes an optical system for optical power combining capable of efficiently coupling light from a plurality of light sources to one light receiver to obtain high output. According to this optical system for optical power combining, the magnification of the lens system can be reduced by using an anamorphic optical element to make the beams in the vertical direction and the beams in the horizontal direction the same size, and thus the converging diameter can be reduced. Therefore, the coupling efficiency to the photoreceiver can be improved, and a high-output laser beam can be obtained. [0004] The beam emitted from the laser...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/42
CPCB23K1/0056B23K26/0604B23K26/0652B23K26/362B23K26/064B23K26/21B23K26/352G02B6/4206G02B6/4296H01S5/02212H01S5/141H01S5/4012H01S5/4025B23K26/22G02B6/4214G02B6/4215G02B6/4272H01S5/02253
Inventor 坂本隼规齐川次郎东條公资
Owner SHIMADZU SEISAKUSHO CO LTD
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