2020
DOI: 10.1063/5.0005140
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Measuring the orbital angular momentum of high-power laser pulses

Abstract: In this article, we showcase experimental results of methods to produce and characterize orbital angular momentum (OAM) carrying high-power lasers. The OAM pulses were produced on the ASTRA laser of the Central Laser Facility (CLF) using a continuous spiral phase plate (SPP). Three different characterization methods were then used to measure the OAM content of the beam. The methods that were used were a cylindrical lens diagnostic, an interferometric diagnostic and a projective diagnostic. We further discuss t… Show more

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Cited by 15 publications
(11 citation statements)
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“…Considering high energy lasers, VBs were generated at the ASTRA laser facility using a spiral phase plate made of polymethyl methacrylate. The incident laser beam on the sample was 50 fs short and had a pulse energy of about 600 mJ at a central wavelength of 800 nm [24]. A different approach was taken in the UHi100 facility, where laser induced fork plasma gratings were used to diffract the laser pulses possessing orbital angular momentum after diffraction [25].…”
Section: Introductionmentioning
confidence: 99%
“…Considering high energy lasers, VBs were generated at the ASTRA laser facility using a spiral phase plate made of polymethyl methacrylate. The incident laser beam on the sample was 50 fs short and had a pulse energy of about 600 mJ at a central wavelength of 800 nm [24]. A different approach was taken in the UHi100 facility, where laser induced fork plasma gratings were used to diffract the laser pulses possessing orbital angular momentum after diffraction [25].…”
Section: Introductionmentioning
confidence: 99%
“…Concurrently, new optical techniques for producing helical wave-fronts [15,16,17,18,19,20] are also being developed. There now exist multiple computational [21,22,23,24,17,25,26,27,28,29] and experimental [15,18,30,31,32] studies examining interactions of helical laser beams with plasmas. There are also some published works on the terawatt scale helical laser production using a chirped-pulse amplification system [33,34].…”
Section: Introductionmentioning
confidence: 99%
“…Concurrently, new optical techniques for producing helical wave-fronts [15][16][17][18][19][20] are also being developed. There now exist multiple computational [17,[21][22][23][24][25][26][27][28][29] and experimental [15,18,[30][31][32] studies examining interactions of helical laser beams with plasmas.…”
Section: Introductionmentioning
confidence: 99%
“…Various new simulation phenomena and theories on interactions between intense LG mode laser beams and plasma have been proposed [8,9,10,11,12,13,14,15,16,17,18,19,20,21,22]. In experiments, several works have been reported [23,24,16,25,26,27,28]. But high-efficiency OAM exchange between plasma and field still needs more attention.…”
Section: Introductionmentioning
confidence: 99%