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Spread angle measurement device, spread angle measurement method, laser device, and laser system

A measuring device and measuring method technology, applied in the field of laser systems, can solve the problems of monitoring the laser diffusion angle, difficulty, etc., and achieve the effect of a simple structure

Inactive Publication Date: 2019-09-20
THE FUJIKURA CABLE WORKS LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, similar to the structure of Patent Document 1, it is difficult to monitor the spread angle of laser light emitted from a high-power fiber laser device under actual operating conditions.

Method used

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  • Spread angle measurement device, spread angle measurement method, laser device, and laser system
  • Spread angle measurement device, spread angle measurement method, laser device, and laser system
  • Spread angle measurement device, spread angle measurement method, laser device, and laser system

Examples

Experimental program
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Effect test

no. 1 Embodiment approach 〕

[0038] figure 1 It is a block diagram showing the configuration of the laser device of the first embodiment.

[0039] like figure 1 As shown, the laser device 1 of this embodiment includes a laser light source 11 , a transmission fiber 12 , a cladding light removing unit 13 , a connector 14 , and a spread angle measuring device 15 . The laser device 1 emits laser light L outward from the connector 14 . In addition, when the laser device 1 is used for, for example, laser processing, the laser light L is emitted from the head (not shown) at the tip of the connector 14 toward the surface to be processed.

[0040] The first end portion 12a of the transmission fiber 12 is connected to the laser light source 11, and the laser light L is input thereto. The second end 12 b of the transmission fiber 12 is connected to the connector 14 . In the present embodiment, along the propagation direction of light, the side of the first end portion 12a is referred to as the light input side, ...

no. 2 Embodiment approach 〕

[0081] Figure 7 It is a block diagram showing the configuration of the laser device of the second embodiment.

[0082] Such as Figure 7 As shown, the laser device 2 of this embodiment adopts a replacement figure 1 The shown laser device 1 has a structure in which a spread angle measuring device 15 is provided with a spread angle measuring device 40 . The diffusion angle measuring device 40 has a temperature detector 41 instead of figure 1 The configuration of the second photodetector 32 of the laser device 1 is shown.

[0083] The temperature detector 41 detects the temperature of a specific part of the cladding light removal part 13 (for example, Figure 3A , Figure 3B A detector that detects the temperature at predetermined positions of the casing 20 and the cover 25 shown). The cladding light removed by the cladding light removing unit 13 is absorbed by the cladding light removing unit 13 , thereby increasing the temperature of the cladding light removing unit 13 ....

no. 3 Embodiment approach 〕

[0086] Figure 8 It is a block diagram showing the configuration of the laser device of the third embodiment.

[0087] like Figure 8 As shown, the laser device 3 of this embodiment adopts a replacement figure 1 The shown laser device 1 has a configuration in which a diffusion angle measurement device 15 is provided with a diffusion angle measurement device 50 . In this diffusion angle measuring device 50, the configuration is omitted. figure 1 The second photodetector 32 of the shown laser device 1 inputs the detection result of the current detector CD provided in the laser light source 11 to the computing unit 33 .

[0088] The current detector CD detects the driving current supplied to the laser light source 11 (for example, the current for driving the excitation light source provided in the laser light source 11 ). The power of the laser light emitted from the laser light source 11 is approximately proportional to the driving current of the laser light source 11 . The...

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Abstract

A spread angle measurement device (15) monitors the spread angle of a laser light propagating within an optical fiber (F) that has a core and a cladding. The spread angle measurement device is provided with a first light detector (31) that detects the laser light leaking out from the cladding of the optical fiber, and a computation unit (33). The computation unit determines the spread angle of the laser light on the basis of a detection result from the first light detector and power information that indicates the power of the laser light propagating within the optical fiber.

Description

technical field [0001] The present invention relates to a diffusion angle measurement device, a diffusion angle measurement method, a laser device and a laser system. [0002] This application claims priority based on Japanese Patent Application No. 2017-059779 filed in Japan on March 24, 2017, and the content thereof is incorporated herein. Background technique [0003] In recent years, attention has been paid to fiber laser devices as high-output laser devices used in the industrial field. Compared with conventional high-output laser devices (such as carbon dioxide laser devices), this fiber laser device has beam quality (BPP: BeamParameter Product or M 2 ) are superior and have high light-gathering properties. Therefore, if a fiber laser device is used instead of a conventional carbon dioxide laser device or the like, processing time can be shortened and energy can be saved. [0004] In such a fiber laser device, there is a possibility that the spread angle of the emit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J1/02G01J1/42G01M11/00G01M11/02G02B6/42H01S3/00
CPCG01J2001/4261G01J1/0437G01J1/4228G01J1/0425G01J1/0252G02B6/4206G02B6/4219G01J1/42G02B6/42G01M11/02G01J1/02
Inventor 日高辉
Owner THE FUJIKURA CABLE WORKS LTD
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