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Anti-reflection system and method for fiber laser

A fiber laser and anti-reflection technology, applied in the field of anti-reflection systems, can solve the problems of difficulty in controlling the reflection direction and intensity of reflected light from the workpiece, unstable laser output spectrum, and output power jitter, etc., to improve the optical transmission efficiency. , the structure is simple, the effect of reducing energy loss

Active Publication Date: 2020-05-08
BEIJING INST OF AEROSPACE CONTROL DEVICES
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

In the process of high-power laser processing, as the high-power laser is incident on the surface of the processed material, the processing molten pool is formed, and the reflective surface of the workpiece surface will change dynamically, resulting in dynamic changes in the surface scattering of the workpiece, making the reflected light reflection direction and the Difficult to control light intensity
The reflected laser light is very easy to enter the laser, causing the instability of the output spectrum of the laser, the jitter of the output power, etc., and eventually damaging the laser

Method used

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  • Anti-reflection system and method for fiber laser
  • Anti-reflection system and method for fiber laser
  • Anti-reflection system and method for fiber laser

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Embodiment

[0032] Such as figure 1 and figure 2 As shown, an anti-reflection system for a fiber laser, the anti-reflection system includes a first reflector, a second reflector, a first collimator, a second collimator, an energy-absorbing box, a transmission fiber, and an end cap , photodetector and main control circuit;

[0033] The second mirror is an adjustable mirror, and the adjustable reflection angle is 0-10°;

[0034] The end cap is welded to one end of the transmission fiber, the connection point between the end cap and the transmission fiber is the return light detection point, and the other end of the transmission fiber is fixedly connected to the second collimator;

[0035] When the workpiece to be processed is processed, the laser light emitted by the fiber laser passes through the first collimator, the first reflector, the second reflector, and the second collimator in sequence, and then is transmitted to the end cap through the transmission fiber, and then transmitted t...

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Abstract

The invention relates to an anti-reflection system and method for a fiber laser, and belongs to the technical field of fiber laser protection. A transmission light path of high-power laser generated by the optical fiber laser sequentially passes through a transmission optical fiber, a space reflector, a tunable reflector, a transmission optical fiber, a return light detection point and an end capto reach a processing area; and return of a machined part can be attenuated through a welding point, and meanwhile light leaked from the welding point can be monitored through a photoelectric detector. And when the return light monitored by the photoelectric detector reaches a specific threshold value, the second reflector deflects, and the emitting direction of the laser is changed.

Description

technical field [0001] The invention relates to an anti-reflection system and method for fiber lasers, belonging to the technical field of fiber laser protection. Background technique [0002] Fiber laser plays a pivotal role in the field of laser processing. It has made rapid progress in the fields of laser cutting, laser welding, laser cladding, laser cleaning, and laser 3D printing, and has a tendency to replace traditional processing. With the advancement of laser technology, lasers can already process a variety of materials, but in the field of processing high-reflective materials such as aluminum, copper, and silver, it is still necessary to use auxiliary oxidizing gas to reduce the laser power threshold for processing, so as to effectively Reduce the reflected light on the surface of the processed material from damaging the laser. In the process of high-power laser processing, as the high-power laser is incident on the surface of the processed material, the processin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01S3/00H01S3/067
CPCH01S3/0014H01S3/0064H01S3/0071H01S3/067
Inventor 师红星王军龙张路姜诗琦李本海杨晓丽
Owner BEIJING INST OF AEROSPACE CONTROL DEVICES
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