Analysis of the beam-pointing stability in the high power laser system

Ding, Lei; Li, Sensen; Lü, Zhiwei; Wang, Yulei; Zhu, Chengyu; Chen, Yi; Du, Peng; Zhang, Hongyue; Cui, Can; Zhou, Li; Yuan, Hang; Bai, Zhenxu; Wang, Yirui; Tan, Tan

doi:10.1016/j.ijleo.2016.04.061

Cited by 17 publications

(5 citation statements)

References 34 publications

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“…The analysis of δox and δoy distribution can also prove that the system plays a significant positive role in stabilizing the beam pointing. In addition, the following equation was introduced to analyze the beam pointing stability quantitatively: 45 Δθ=1N∑j=1N(δjf)2,where δj is the j’th position offset, f is the focal length of the focusing lens (128 mm), and N is the total amount of measured position offset data.…”

Section: Experimental Setup and Resultsmentioning

confidence: 99%

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Improving laser cutting quality of carbon fiber-reinforced plastics by improving laser beam pointing stability

et al. 2022

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.A heat-affected zone significantly reduces the mechanical properties of carbon fiber-reinforced plastics (CFRP). However, the beam quality, especially the stability of the beam pointing, limits the heat-affected zone (HAZ) minimization studies. In this study, the HAZ is reduced by improving the pointing stability of the laser beam. A beam pointing stabilization system (BPSS) based on position-sensitive devices and fast steering mirrors (FSMs) was developed. The research focuses on building a control model from the position-sensitive devices’ position deviation signals to the FSMs’ corrected control angles. The control model can detect and predict the beam pointing deviations and correct the attitudes of the FSMs to correct the beam pointing deviations, improving the beam pointing stability. The performance of the proposed BPSS and the corresponding control model were experimentally verified. The results indicate that the pointing deviations of the corrected beam in the X and Y directions are reduced by 78.08% and 70.28%, respectively. Additionally, the HAZ of CFRP processed with the corrected laser is reduced by 30.8%. The quality of the laser cutting of CFRP is significantly improved.

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Section: Experimental Setup and Resultsmentioning

confidence: 99%

“…The coordinate systems of FSM1 and FSM2 are obtained by rotating the original spatial coordinate system clockwise by 45 10) and (11), respectively. R 2 and R 3 are the rotation matrices of FSM1 and FSM2 in their coordinate systems, respectively, as shown in Eqs.…”

Section: > > > mentioning

confidence: 99%

Improving laser cutting quality of carbon fiber-reinforced plastics by improving laser beam pointing stability

et al. 2022

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“…The temporally variable thermal expansion of the laser crystal and mechanical vibrations disturbing laser sources are the main factors of the jitter of beamlets 1 and 2. [18] The rms values of the pointing jitter for the combined beam are 𝜎 𝑋 = 8.5 µrad and 𝜎 𝑌 = 5.7 µrad (Fig. 6(c)).…”

Section: Fsmmentioning

confidence: 96%

High Power Pulse Laser Reflection Sequence Combination with a Fast Steering Mirror*

Gong¹,

Xu²,

Zhang³

et al. 2019

Chinese Phys. Lett.

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We propose and demonstrate a new approach for a high power pulse laser reflection sequence combination with a fast steering mirror (FSM). This approach possesses significant advantages for lasers combining with a variety of output power, wavelength, pulse duration, repetition rates and polarization. The maximum number of laser routes participating in combination principally depends on the FSM’s adjustment time of the step response, lasers’ repetition rates and pulse duration. A proof-of-principle experiment is performed with two 2-kW level pulsed beams. The results indicate that the combined beam has an excellent pointing stability with rms pointing jitter ∼8.5 μrad. Meanwhile, a high combining efficiency of 98.6% is achieved with maintaining good beam quality.

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“…The obvious drift of the laser spot on the imaging plane caused by the change of the influencing factors reflected the absolute location accuracy of the system, which was evaluated by the drifting RMS [17,18], as shown in equations ( 16) and ( 17)…”

Section: Absolute Location Accuracymentioning

confidence: 99%

Research on laser spot location accuracy of low-power laser diode source applied to high precision laser measurement system

Nan

Zhou

Wan³

et al. 2022

Meas. Sci. Technol.

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The results of laser spot location have an important influence on the accuracy of a laser measurement system. Laser diode (LD) sources have been widely used in recent years because of its low cost and easy integration. Based on the low-power LD source, a conventional laser spot location system was built to study the factors that affect the accuracy of location. We analyzed the influencing factors on laser spot location from two aspects of LD driven and CCD imaging, and experiments were conducted to further obtain quantitative analysis results and laws on different influencing factors, including the LD temperature, LD injection current, the size of imaging laser spot and its intensity fluctuation. The drifting RMS and the dithering range R were adapted to evaluate the drift and dither of the laser spot respectively, and the influence laws of location error were discussed. Finally, laser triangulation displacement sensor was taken as an optimization design example when considering the influencing factors studied in this paper. As a result, the RMS accuracy of the design example was 3.6μm and its repeatability was 2.17 μm. The experimental results provided guidance for the optimization design of laser spot location measurement system.

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Analysis of the beam-pointing stability in the high power laser system

Cited by 17 publications

References 34 publications

Improving laser cutting quality of carbon fiber-reinforced plastics by improving laser beam pointing stability

Improving laser cutting quality of carbon fiber-reinforced plastics by improving laser beam pointing stability

High Power Pulse Laser Reflection Sequence Combination with a Fast Steering Mirror*

Research on laser spot location accuracy of low-power laser diode source applied to high precision laser measurement system

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