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Control method, control device and light source device

A control method and technology of a light source device, which are applied to lasers, laser parts, semiconductor lasers, etc., can solve the problems of labor cost, lower utilization efficiency of laser diodes, lower utilization efficiency of laser light sources, etc., and achieve the effect of improving utilization efficiency.

Active Publication Date: 2019-05-17
FUJIKURA LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The reason is that if all the laser light sources are not replaced at the same time, but only the laser light source that needs to be replaced at any time, the replacement operation is not easy, and the possibility of successive replacement operations is high, which takes a lot of effort and cost.
[0008] On the other hand, in the method of replacing all the laser light sources at the same time, it is also considered that the laser light source that does not actually need to be replaced is replaced, so there is a possibility that the utilization efficiency of the laser light source will decrease.
Such a problem may also occur in a light source device using an LD module including a plurality of laser diodes as a laser light source.
In particular, in an LD module including a plurality of laser diodes, even if only a part of the laser diodes fails, there is a high possibility that the entire LD module must be replaced, and there is a possibility that the utilization efficiency of the laser diodes will further decrease.

Method used

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  • Control method, control device and light source device
  • Control method, control device and light source device
  • Control method, control device and light source device

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Experimental program
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Embodiment approach 1

[0021] Hereinafter, a fiber laser according to an embodiment of the present invention will be described with reference to the drawings.

[0022] [Configuration of Fiber Laser 100 ]

[0023] First, refer to figure 1 , the configuration of the fiber laser 100 according to the embodiment of the present invention will be described. figure 1 It is a figure which shows the structure of the fiber laser 100 which concerns on embodiment of this invention.

[0024] figure 1 The illustrated fiber laser 100 generates output light as high-output laser light by amplifying excitation light (laser light) emitted from a plurality of LD (Laser Diode: laser diode) modules (laser light sources), and outputs the output light. device. Such as figure 1 As shown, the fiber laser 100 has a plurality of subunits 110 . Each subunit 110 includes a plurality of LD modules 112 , a plurality of LD power supplies 114 , a plurality of LD drivers 115 , a pump multiplexer 116 , and an optical fiber 118 fo...

Embodiment approach 2

[0074] Other embodiments of the present invention will be described below based on the drawings.

[0075] [Configuration of Fiber Laser 101 ]

[0076] Such as figure 1 As shown, the fiber laser 101 according to this embodiment has the same configuration as the above-mentioned fiber laser 100 .

[0077] (control circuit 120)

[0078] The driving current control unit 122 of the control circuit 120 of the fiber laser 101 is the same as the case of the fiber laser 100, and based on the intensity of the output light fed back from the PD 130, the intensity of the output light is maintained at a predetermined intensity, so that it belongs to a specific The driving current of the group of LD modules 112 increases. In addition, in the fiber laser 101 in this embodiment, the driving current of the LD modules 112 belonging to a specific group is set to be higher than the driving currents of the LD modules of other groups.

[0079] When the drive current of the LD modules 112 belongin...

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Abstract

The control method is a control method of a fiber laser (100) with a plurality of LD modules (112) forming multiple groups, and the control method includes: a detection process, detecting the intensity of laser light output by the fiber laser (100); and driving The current control step increases the drive current of the LD modules (112) of a specific group among the plurality of groups when the intensity of the laser light detected in the detection step is lower than a predetermined lower limit threshold.

Description

technical field [0001] The present invention relates to a control method, a control device, and a light source device for controlling a driving current for emitting excitation light. Background technique [0002] Conventionally, there is known a fiber laser that introduces excitation light emitted from a laser diode (laser light source) into an optical fiber for amplification, and amplifies the laser light in the optical fiber for amplification to generate high-output laser light. In such a fiber laser, in particular, a plurality of excitation lights emitted from a plurality of laser diodes are multiplexed and introduced into an optical fiber for amplification, whereby higher output laser light can be generated. High-output laser light output from such a fiber laser is used for applications such as laser processing, for example. [0003] In the method described in Patent Document 1 below, in a fiber laser device including a plurality of laser diodes that emit excitation lig...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01S3/131H01S3/0941H01S5/062H01S5/0683
CPCH01S3/067H01S3/09408H01S3/09415H01S3/094053H01S5/06825H01S5/0683H01S3/1305H01S5/4025H01S3/1312H01S3/2383H01S3/13013H01S5/042H01S5/0687H01S5/4012
Inventor 阪本真一
Owner FUJIKURA LTD