Shack — Hartmann wavefront sensor for measuring the parameters of high-power pulsed solid-state lasers

Aleksandrov, A.; Zavalova, Valentina Ye.; Kudryashov, Alexis; Rukosuev, Alexey; Sheldakova, Julia; Samarkin, Vadim; Romanov, Pavel

doi:10.1070/qe2010v040n04abeh014061

Cited by 39 publications

(7 citation statements)

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“…The DM operates with a low-power beam with a pulse repetition rate of 100 Hz. The wavefront is measured with a Hartmann sensor [ 89 , 90 ] , and the quality of focusing is measured with a charge-coupled device (CCD) camera that records the energy distribution in the far-field. Two sets of sensors are used and, accordingly, two feedbacks, shown in Figure 14 by yellow lines.…”

Section: Exawatt Center For Extreme Light Studies Lasermentioning

confidence: 99%

eXawatt Center for Extreme Light Studies

Khazanov,

Shaykin,

Kostyukov

et al. 2023

High Pow Laser Sci Eng

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The eXawatt Center for Extreme Light Studies project aimed to create a large scientific infrastructure based on lasers with giant peak power. The project relies on the significant progress achieved in the last decade. The planned infrastructure will incorporate a unique light source with a pulse power of 600 PW using optical parametric chirped pulse amplification in large-aperture KD 2 PO 4 , deuterated potassium dihydrogen phosphate crystals. The interaction of such laser radiation with matter represents a completely new fundamental physics. The direct study of the space-time structure of vacuums and other unknown phenomena at the frontier of high-energy physics and the physics of superstrong fields will be challenged. Expected applications will include the development of compact particle accelerators, the generation of ultrashort pulses of hard X-ray and gamma radiation for material science enabling one to probe material samples with unprecedented spatial and temporal resolution, the development of new radiation and particle sources, etc. The paper is translation from Russian [Kvantovaya Elektronika 53, 95 (2023)].

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Section: Exawatt Center For Extreme Light Studies Lasermentioning

confidence: 99%

eXawatt Center for Extreme Light Studies

Khazanov,

Shaykin,

Kostyukov

et al. 2023

High Pow Laser Sci Eng

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“…Wavefront φ measurements by an HS are based on the estimations of local slopes of a distorted wavefront ∂φ∕∂n versus some ideal ones [6,7]. The whole wavefront is divided into several subapertures by a set of diaphragms (Hartmann mask) and the deviation of the light spot at the sensing plane with respect to some reference position in each subaperture is measured.…”

Section: A Some Theorymentioning

confidence: 99%

Extremely high-power CO₂ laser beam correction

et al. 2015

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This paper presents the results of high-power CO2 laser-aberration correction and jitter stabilization. A bimorph deformable mirror and two tip-tilt piezo correctors were used as executive elements. Two types of wavefront sensors, one Hartmann to measure higher-order aberrations (defocus, astigmatism etc.) based on an uncooled microbolometer long-wave infrared camera and the other a tip-tilt one based on the technology of obliquely sputtered, thin chromium films on Si substrates, were applied to measure wavefront aberrations. We discuss both positive and negative attributes of suggested wavefront sensors. The adaptive system is allowed to reduce aberrations of incoming laser radiation by seven times peak-to-valley and to stabilize the jitter of incoming beams up to 25 μrad at a speed of 100 Hz. The adaptive system frequency range for high-order aberration correction was 50 Hz.

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“…The accurate acquisition of the thermal distortion of a single optical surface is essentially important to the design and control of the high-power laser. Shack-Hartmann wavefront sensing (SHWFS) is widely used to measure the wavefront distortion of the laser beam in high-power laser facilities, including the National Ignition Facility [6,7], the Laser MégaJoule Facility [8], the OMEGA extended performance Laser System, and the Chinese ICF Facility [9]. However, the SHWFS mainly focuses on the wavefront distortion measurement of the whole system.…”

Section: Introductionmentioning

confidence: 99%

Surface Shape Distortion Online Measurement Method for Compact Laser Cavities Based on Phase Measuring Deflectometry

et al. 2022

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Conventional phase measuring deflectometry (PMD) takes up a large measurement space and is not suitable for compact online measurement, as the liquid crystal display (LCD) has to be placed in parallel with the mirror under test. In this paper, a compact online phase measuring deflectometry (COPMD) with the LCD screen set perpendicular to the mirror under test is presented for surface shape distortion real-time measurement. The configuration of the COPMD in an enclosed laser cavity is proposed, and the principle of the method is theoretically derived by using the vector-form reflection law. Based on the analysis model, the fringe modulation regulation of the LCD is revealed, and the measurement errors caused by misalignments of the components are illustrated. The validity and flexibility of the COPMD method are verified in the experiment by using a single-actuator deformable mirror as the mirror under test and the PMD method as the comparison. The proposed COPMD method remarkably expands the application range of the conventional PMD method, as it could make efficient use of compact space and is applicable for real-time measurement in enclosed laser facilities and assembled laser systems.

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Shack — Hartmann wavefront sensor for measuring the parameters of high-power pulsed solid-state lasers

Cited by 39 publications

References 0 publications

eXawatt Center for Extreme Light Studies

eXawatt Center for Extreme Light Studies

Extremely high-power CO₂ laser beam correction

Surface Shape Distortion Online Measurement Method for Compact Laser Cavities Based on Phase Measuring Deflectometry

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Shack — Hartmann wavefront sensor for measuring the parameters of high-power pulsed solid-state lasers

Cited by 39 publications

References 0 publications

eXawatt Center for Extreme Light Studies

eXawatt Center for Extreme Light Studies

Extremely high-power CO2 laser beam correction

Surface Shape Distortion Online Measurement Method for Compact Laser Cavities Based on Phase Measuring Deflectometry

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Product

Resources

About

Extremely high-power CO₂ laser beam correction