Device for Simultaneously Measuring Power, Spectrum and Beam Quality of High Power Fiber Lasers

A fiber laser and beam quality technology, applied in measuring devices, testing optical performance, instruments, etc., can solve difficult problems such as simultaneous and accurate measurement of power, spectrum and beam quality, improve measurement efficiency and accuracy, and avoid interference factors , Improve the effect of measurement efficiency

Active Publication Date: 2020-04-10
NANJING UNIV OF SCI & TECH
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  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When measuring it, in order to measure accurately, whether it is power, spectrum or beam quality, it is necessary to ensure that the measurement beam is consistent with the original beam, and the measurement of high-power lasers requires attenuation and adjustment of aberrations. Difficult to simultaneously and accurately measure its power, spectrum, and beam quality

Method used

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  • Device for Simultaneously Measuring Power, Spectrum and Beam Quality of High Power Fiber Lasers
  • Device for Simultaneously Measuring Power, Spectrum and Beam Quality of High Power Fiber Lasers
  • Device for Simultaneously Measuring Power, Spectrum and Beam Quality of High Power Fiber Lasers

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Embodiment 1

[0041] Figure 4 It depicts an optical circuit diagram of a device for synchronously measuring the power, spectrum and beam quality of a high-power fiber laser. The laser beam output from the QBH output port of the high-power fiber laser is collimated by the collimator 1 and then emitted as parallel light. The emitted laser After hitting the high reflection mirror 2, it is divided into the first reflected light and the first transmitted light. The first reflected light hits the plano-concave mirror 3 and becomes diffused light. The diffused light hits the target surface 4 of the power meter. The power meter target surface 4 converts the measured thermal signal into a voltage signal and sends it to the power meter 5 to obtain output power. The first transmitted light hits the first wedge plate 6-1 and is divided into the second reflected light and the second transmitted light. After the second transmitted light is attenuated by the first multi-slot pluggable attenuator 7-1, it...

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Abstract

The invention discloses a device for synchronously measuring the power, the spectrum and the beam quality of a high-power fiber laser. A collimator, a high-reflectivity mirror group, first wedge glass, a first multi-slot pluggable attenuator, a convex lens and a fiber probe are successively arranged along the same optical axis and form a spectrum-measuring optical path. The collimator is arranged at the output end of the fiber laser to be tested. The fiber probe is connected with a fiber spectrometer. A plane-concave mirror and a power meter target surface are successively arranged on the reflection optical path of the high-reflectivity mirror group. The power meter target surface is connected with a power meter. Second wedge glass is disposed on the reflection optical path of the first wedge glass. The second multi-slot pluggable attenuator and a beam quality analyzer are successively disposed on the reflection optical path of the second wedge glass. The above components are arranged on an optical platform. The device synchronously measures the power, the spectrum and the beam quality of the high-power fiber laser, improves measurement efficiency, reduces the influences of interference factors such as optical aberrations and pumping light on a measurement result, and improves measurement accuracy.

Description

technical field [0001] The invention relates to the field of high-power laser measurement, in particular to a device for synchronously measuring the power, spectrum and beam quality of a high-power fiber laser. Background technique [0002] Since its inception, laser has been widely used in science and technology, military, medical, industrial processing and communication fields due to its high brightness, high directivity, high monochromaticity and high coherence. In recent years, with the progress and development of laser technology, the peak output power of lasers has continuously made breakthroughs, high-power lasers have achieved rapid development, and are rapidly used in industrial and military fields. In the manufacturing industry, it can be used as a high-intensity light source for cutting, drilling, welding, etc. In the military field, it can be used for vehicle-mounted and ship-borne laser weapons, and can also be used as a beacon light source for laser weapons. I...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01M11/02
CPCG01M11/00
Inventor 韩志刚孟令强沈华朱日宏陈磊何勇尹路李雪汤亚洲黄哲强李登科葛诗雨石慧张秋庭
Owner NANJING UNIV OF SCI & TECH
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