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Calibration method and calibration device for high-power laser power meter

A technology of laser power meter and calibration method, which is applied in the direction of photometry, measuring device, optical radiation measurement, etc., can solve the problems of output power stability, output laser polarization state stability, etc. Start-up stable time, suppression of uncertainty, high precision effect

Pending Publication Date: 2021-10-29
EDINBURGH NANJING OPTO ELECTRONICS EQUIP CO LTD +1
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  • Abstract
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  • Application Information

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Problems solved by technology

[0003] However, fiber lasers that can generate kilowatt-level laser output are usually fiber lasers. The value of the output power, the stability of the output power, and the stability of the polarization state of the output laser are not suitable for the precise calibration of kilowatt-level laser power meters.

Method used

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  • Calibration method and calibration device for high-power laser power meter
  • Calibration method and calibration device for high-power laser power meter

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Embodiment 1

[0049] Such as figure 1 As shown, a high-power laser power meter calibration device includes a standard power meter, a power meter to be calibrated, and a low-power laser optical path; there are three low-power laser optical paths, one of which is the central laser optical path, and the rest are peripheral Laser light path, all low-power laser light paths are combined and superimposed on the standard power meter or the power meter to be calibrated. After the beam is combined and superimposed, the angle between the peripheral laser beam and the central laser beam is less than 5°.

Embodiment 2

[0051] On the basis of embodiment 1, the following improvements have been further made: all low-power laser light path structures are the same, and along the propagation direction of the light path, each low-power laser light path includes successively connected lasers (500W), beam expanders , polarizers and mirrors.

Embodiment 3

[0053] On the basis of embodiment 2, further improvements are made as follows: each low-power laser optical path is provided with a laser sampler and a laser sampling power meter, the laser sampler is arranged between polarizer mirrors, and the laser sampling power meter is used for Used to measure the power of samples sampled by laser samplers.

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Abstract

The invention discloses a calibration method and a calibration device for a high-power laser power meter. The calibration method for the high-power laser power meter comprises the steps of: combining and superposing more than two beams of low-power laser with the same power on a standard power meter or a calibrated power meter, and achieving the calibration of the calibrated power meter, wherein one beam in the low-power laser is a central laser beam, the rest are peripheral laser beams, and an included angle between the peripheral laser beams and the central laser beam after beam combination and superposition is smaller than 5 degrees. The calibration device for the high-power laser power meter realizes calibration of the high-power laser power meter by using low-power laser, and is high in precision, good in stability, easy to operate and high in safety.

Description

technical field [0001] The invention relates to a high-power laser power meter calibration method and a calibration device, belonging to the technical field of high-power laser power meter calibration. Background technique [0002] Fiber lasers with kilowatt output have been mass-produced and widely used in cutting, welding, drilling, marking, cleaning, foreign matter removal, anti-drone and other industries. In practical applications, accurate measurement of laser output power is crucial to ensure the normal function of laser processing equipment. If the laser output power is too low, the function of the equipment will fail; if the laser output power is too high, the equipment itself and the workpiece to be processed will face the risk of being burned. The laser output power is usually measured by a laser power meter. As the components of the laser power meter age, the readings of the laser power meter may drift and become inaccurate. The laser power meter is calibrated. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J1/00
CPCG01J1/00
Inventor 王善忠张金兴曲英丽
Owner EDINBURGH NANJING OPTO ELECTRONICS EQUIP CO LTD
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