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Stable light splitting method and device of laser beam and calibration method and device of laser power meter

A technology of laser power meter and laser beam, which is applied in photometry, measuring device, optical radiation measurement, etc., can solve the problems of randomness, impossibility of calibration of power meter, difficulty in development of high-power laser test instrument, etc., and achieve Effect of eliminating time fluctuation error

Pending Publication Date: 2022-08-02
EDINBURGH NANJING OPTO ELECTRONICS EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because usually the polarization direction of the high-power fiber laser output laser beam is randomly changed and uncertain, and most of the beamsplitters suitable for high-power laser beam splitting are dielectric film beamsplitters, and dielectric film beamsplitters are polarization-dependent , therefore, the power of the laser beam that is distributed has serious randomness and uncertainty, which brings great difficulties to the development of high-power laser test equipment, resulting in the use of high-power fiber laser to test the power meter. Calibration cannot be achieved
So far, there is no effective solution for stable and reliable beam splitting of randomly polarized fiber lasers, and there is no report on the use of randomly polarized fiber lasers for high-power laser power meter calibration

Method used

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  • Stable light splitting method and device of laser beam and calibration method and device of laser power meter
  • Stable light splitting method and device of laser beam and calibration method and device of laser power meter
  • Stable light splitting method and device of laser beam and calibration method and device of laser power meter

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Experimental program
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Effect test

Embodiment 1

[0064] like figure 1 As shown, a stable beam splitting device for a laser beam includes a beam expander, a first polarized beam splitter, a second polarized beam splitter, a first reflector, a first polarized beam combiner, a third polarized beam splitter, a second polarized beam splitter, and a second polarized beam splitter. mirror and a second polarizing beam combiner;

[0065] The beam expander and the first polarizing beam splitter are sequentially arranged along the propagation direction of the optical path;

[0066] along the propagation direction of the reflected light path of the first polarization beam splitter and the transmission light path of the second polarization beam splitter, the first polarization beam splitter, the second polarization beam splitter, the first reflector and the first polarization beam combiner are arranged in sequence;

[0067] along the propagation direction of the reflected light path of the first polarized beam splitter and the reflected...

Embodiment 2

[0076] like figure 1 As shown, a device for applying an industrial-grade fiber laser to laser power meter calibration includes a beam expander, a first polarization beam splitter, a second polarization beam splitter, a first reflector, a first polarization beam combiner, a third Polarization beam splitter, second reflector, second polarization beam combiner, first laser power meter and second laser power meter; the first laser power meter is a sampling laser power meter, and the second laser power meter is a laser power meter to be measured or standard laser power meter;

[0077] The beam expander and the first polarizing beam splitter are sequentially arranged along the propagation direction of the optical path;

[0078]Along the propagation direction of the reflected light path of the first polarization beam splitter and the transmission light path of the second polarization beam splitter, the first polarization beam splitter, the second polarization beam splitter, the firs...

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Abstract

The invention discloses a laser beam stable light splitting method and device and a laser power meter calibration method and device.The laser beam stable light splitting method comprises the following steps that (1) a laser beam It is divided into a first light beam Ia and a second light beam Ib, it, Ia and Ib represent the light intensity of the corresponding light beams respectively, and it = Ia + Ib; 2) dividing the first light beam Ia into a first A light beam n% Ia and a first B light beam (100-n)% Ia; dividing the second light beam Ib into a second A light beam n% Ib and a second B light beam (100-n)% Ib; 3) combining the first A light beam n% Ia and the second A light beam n% Ib to obtain n% It; combining the first B light beam (100-n)% Ia and the second B light beam (100-n)% Ib to obtain (100-n)% It; and stable light splitting of the laser beam is realized. According to the invention, laser beams of various energy levels, including high-power fiber laser beams with random polarization directions, can be stably and accurately split; the calibration and on-site monitoring of the high-power laser power meter are realized by using the high-power optical fiber laser beams.

Description

technical field [0001] The invention relates to a stable spectroscopic method and device of a laser beam, and a method and device for calibrating a laser power meter, belonging to the technical field of laser beam splitting and laser power meter calibration. Background technique [0002] High-power fiber lasers with output powers of tens of watts, hundreds of watts, several kilowatts or even tens of thousands of watts have been mass-produced and applied in industrial production practices. These have penetrated into the output of high-power fiber lasers in all walks of life in industrial production. Power must often be measured and monitored using a laser power meter. [0003] In order to ensure accurate measurement and monitoring of laser output power, these power meters used in industrial production sites must be regularly calibrated and numerically corrected, which requires the development of high-precision, high-stable laser power meter calibration equipment . [0004] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01J1/02G01J1/04G01J1/08G01J1/44
CPCG01J1/0295G01J1/08G01J1/0407G01J1/44G01J2001/444
Inventor 王善忠
Owner EDINBURGH NANJING OPTO ELECTRONICS EQUIP CO LTD