&lt;title&gt;High-power solid state lasers with improved beam quality&lt;/title&gt;

Wittrock, Ulrich; Bostanjoglo, G.; Dong, Shalei; Eppich, B.; Haase, Th.; Lue, Qitao; Mueller-Stolzenburg, Norbert; Holst, Otto

doi:10.1117/12.184604

Cited by 2 publications

(1 citation statement)

References 6 publications

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“…Unfortunately, as the laser power continues to increase, the thermal effect of the laser not only limits the improvement of the beam quality severely, but also makes the beam diameter and beam divergence change greatly [ 5 , 6 ]. How to obtain high average power and high beam quality at the same time is a basic physical problem in laser research [ 7 , 8 , 9 ]. Adaptive optics (AO) is a technology that can correct the wavefront distortion of the laser beam in real-time, as shown in Figure 1 .…”

Section: Introductionmentioning

confidence: 99%

Wavefront Restoration Technology of Dynamic Non-Uniform Intensity Distribution Based on Extreme Learning Machine

Lin

Wang

2021

Sensors

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Non-uniform intensity distribution of laser near-field beam results in the irregular shape of the spot in the wavefront sensor. The intensity of some sub-aperture spots may be too weak to be detected, and the accuracy of wavefront restoration is seriously affected. Therefore, an extreme learning machine method is proposed to realize high precision wavefront restoration under dynamic non-uniform intensity distribution. The simulation results show that this method has better accuracy of wavefront restoration than the classical modal algorithm under dynamic non-uniform intensity distribution. The root mean square error of the residual wavefront for the proposed method is only 2.9% of the initial value.

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Section: Introductionmentioning

confidence: 99%

Wavefront Restoration Technology of Dynamic Non-Uniform Intensity Distribution Based on Extreme Learning Machine

Lin

Wang

2021

Sensors

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Automatic low-order aberration correction based on geometrical optics for slab lasers

Dong

Lai

et al. 2017

Appl. Opt.

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In this paper, we present a method based on geometry optics to simultaneously correct low-order aberrations and reshape the beams of slab lasers. A coaxial optical system with three lenses is adapted. The positions of the three lenses are directly calculated based on the beam parameters detected by wavefront sensors. The initial sizes of the input beams are 1.8 mm×11 mm, and peak-to-valley (PV) values of the wavefront range up to several tens of microns. After automatic correction, the dimensions may reach nearly 22 mm×22 mm as expected, and PV values of the wavefront are less than 2 μm. The effectiveness and precision of this method are verified with experiments.

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<title>High-power solid state lasers with improved beam quality</title>

Cited by 2 publications

References 6 publications

Wavefront Restoration Technology of Dynamic Non-Uniform Intensity Distribution Based on Extreme Learning Machine

Wavefront Restoration Technology of Dynamic Non-Uniform Intensity Distribution Based on Extreme Learning Machine

Automatic low-order aberration correction based on geometrical optics for slab lasers

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