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Light guide device, laser module, and manufacturing method of light guide device

A technology of light guide device and laser beam, applied in semiconductor laser device, laser device, semiconductor laser and other directions, can solve the problem of reducing the coupling efficiency of laser diode group L and optical fiber OF, and achieve the effect of small reduction of coupling efficiency

Active Publication Date: 2021-01-15
THE FUJIKURA CABLE WORKS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

As a result, the coupling efficiency between the laser diode group L and the optical fiber OF decreases.

Method used

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  • Light guide device, laser module, and manufacturing method of light guide device
  • Light guide device, laser module, and manufacturing method of light guide device
  • Light guide device, laser module, and manufacturing method of light guide device

Examples

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Deformed example 2

[0064] refer to Figure 6 A second modified example of the laser module 1 will be described. exist Figure 6 Among them, (a) is a plan view of the laser module 1B according to this modification, and (b) is a side view of the laser module 1B according to this modification.

[0065] exist figure 1 In the laser module 1 shown, the upper surface of the substrate B on which the laser diodes LD1 to LDn are placed is planar, and Figure 6 In the illustrated laser module 1B, the upper surface of the substrate B on which the laser diodes LD1 to LDn are arranged has a stepped shape. exist Figure 6 In the illustrated laser module 1B, one laser diode LD1 to LDn is placed on each step of the substrate B, one by one. For example, the laser diode LD10 is placed on the highest step of the substrate B, the laser diode LD9 is placed on the second highest step of the substrate B, and the laser diode LD8 is placed on the third highest step of the substrate B. Therefore, the farther away f...

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Abstract

The present invention achieves the coupling efficiency between the laser diode group (LD) and the optical fiber (OF) that may occur when the resin (R1, R2) used to fix the collimator lens (C1-Cn) absorbs water and expands compared with the past. Lower suppressed laser modules (1, 1A, 1B). The direction of travel of each laser beam constituting the second beam before being focused by the focusing lens (L) is shifted from the reference direction to counteract the water absorption by the resin (R1, R2) used to fix the corresponding collimating lens (Ci). Changes in direction of travel caused by expansion are compensated.

Description

technical field [0001] The invention relates to a light guiding device for guiding light beams. In addition, it relates to a laser module including such a light guide device, and a manufacturing method for manufacturing such a light guide device. Background technique [0002] As a light source for outputting a laser beam, a laser module including a plurality of laser diodes is widely used. As a document disclosing such a laser module, for example, Patent Document 1 is cited. [0003] Such as Figure 8 As shown, the laser module 10 described in Patent Document 1 includes: (1) a laser diode group LD that generates laser beams whose optical axes are arranged in parallel in the first plane and whose F axis is perpendicular to the first plane. The first light beam; (2) collimating lens group C, which will form the expansion of the F axis direction of each laser beam of the first light beam generated by the laser diode group LD to collimate; (3) mirror group M, which will Throu...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02B6/42G02B6/32H01S5/40
CPCH01S5/40G02B6/4214G02B6/4239G02B6/4206H01S5/02251H01S5/02253H01S5/4012G02B7/021G02B7/025G02B27/30H01S5/02255
Inventor 葛西洋平
Owner THE FUJIKURA CABLE WORKS LTD