Qualification and Optimization of Helical Phase Pulses in PW-Class Laser Systems

Iancu, Vicentiu; Talposi, Maria; Popa, Stefan; Ghenuche, Petru; Cernaianu, Mihail; Doria, D.; Cojocaru, G.; Dancus, I.; Ungureanu, R.; Chalus, Olivier; Ursescu, D.

doi:10.1364/aoa.2022.oth4b.2

Cited by 1 publication

(1 citation statement)

References 6 publications

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“…For obvious reasons, the phase plate must be installed before the compressor to avoid nonlinear effects with the temporally compressed pulse [18] . In addition, the maximum allowed energy was reduced to 1 J to keep intensity modulations, caused by the phase discontinuity of the phase plate, below the damage threshold of the compressor gratings and components in the following laser beamline.…”

Section: Experimental Validationmentioning

confidence: 99%

Zernike-coefficient extraction via helical beam reconstruction for optimization (ZEHBRO) in the far field

Ohland,

Posor,

Eisenbarth

et al. 2023

High Pow Laser Sci Eng

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The spatial distribution of beams with orbital angular momentum in the far field is known to be extremely sensitive to angular aberrations, such as astigmatism, coma and trefoil. This poses a challenge for conventional beam optimization strategies when a homogeneous ring intensity is required for an application. We developed a novel approach for estimating the Zernike coefficients of low-order angular aberrations in the near field based solely on the analysis of the ring deformations in the far field. A fast, iterative reconstruction of the focal ring recreates the deformations and provides insight into the wavefront deformations in the near field without relying on conventional phase retrieval approaches. The output of our algorithm can be used to optimize the focal ring, as demonstrated experimentally at the 100 TW beamline at the Extreme Light Infrastructure -Nuclear Physics facility.

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Section: Experimental Validationmentioning

confidence: 99%

Zernike-coefficient extraction via helical beam reconstruction for optimization (ZEHBRO) in the far field

Ohland,

Posor,

Eisenbarth

et al. 2023

High Pow Laser Sci Eng

View full text Add to dashboard Cite

show abstract

Qualification and Optimization of Helical Phase Pulses in PW-Class Laser Systems

Abstract: Optical vortices, generated by a spiral phase plate, were propagated over long distances and focused in the PW experimental area. A deformable mirror was used to correct the low-order distortions, obtaining a doughnut focus.

Cited by 1 publication

References 6 publications

Zernike-coefficient extraction via helical beam reconstruction for optimization (ZEHBRO) in the far field

Zernike-coefficient extraction via helical beam reconstruction for optimization (ZEHBRO) in the far field

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