DiPOLE: a 10 J, 10 Hz cryogenic gas cooled multi-slab nanosecond Yb:YAG laser

Banerjee, Saumyabrata; Ertel, Klaus; Mason, Paul; Phillips, Jonathan; Vido, Mariastefania De; Smith, Joanna; Butcher, Thomas; Hernandez‐Gomez, C.; Greenhalgh, R. J. S.; Collier, J.

doi:10.1364/oe.23.019542

Cited by 75 publications

(30 citation statements)

References 14 publications

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“…With increasing demand for scientific research and engineering applications in space communication, laser marking and laser material processing, Joule-class laser sources with high gain and energy have been receiving increasing attention. Preamplifiers in high-power laser facilities, such as the National Ignition Facility (NIF), Laser Mega Joule (LMJ), SG-II series and the extreme light infrastructure (ELI) [1][2][3] , are representative of these laser systems. As seed sources in the laser inertial confinement fusion (ICF), these preamplifiers are used as boost amplifiers of front-end systems in highpower laser systems, or petawatt pump source systems.…”

Section: Introductionmentioning

confidence: 99%

High-power, Joule-class, temporally shaped multi-pass ring laser amplifier with two Nd:glass laser heads

Guo

Hui

Huang

et al. 2019

High Pow Laser Sci Eng

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A high-power, Joule-class, nanosecond temporally shaped multi-pass ring laser amplifier system with two neodymium-doped phosphate glass (Nd:glass) laser heads is demonstrated. The laser amplifier system consists of three parts: an all-fiber structure seeder, a diode-pumped Nd:glass regenerative amplifier and a multi-pass ring amplifier, where the thermally induced depolarization of two laser heads is studied experimentally and theoretically. Following the injection of a square pulse with the pulse energy of 0.9 mJ and pulse width of 6 ns, a 0.969-J high-energy laser pulse at 1 Hz was generated, which had the ability to change the waveform arbitrarily, based on the all-fiber structure front end. The experimental results show that the proposed laser system is promising to be adopted in the preamplifier of high-power laser facilities.

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Section: Introductionmentioning

confidence: 99%

High-power, Joule-class, temporally shaped multi-pass ring laser amplifier with two Nd:glass laser heads

Guo

Hui

Huang

et al. 2019

High Pow Laser Sci Eng

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“…The all-diode pumped high energy (HE) nanosecond DiPOLE-100X laser is developed by STFC CLF (UK) [125]. It delivers up to 80 J at 515 nm wavelength with pulse durations of 2-15 ns with a maximum repetition rate of 10 Hz.…”

Section: Hed Instrumentation and Capabilitiesmentioning

confidence: 99%

Photon Beam Transport and Scientific Instruments at the European XFEL

et al. 2017

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Featured Application: This article describes the layout of the European XFEL, a soft and hard X-ray free-electron laser user facility starting operation in 2017. Emphasis is put on the photon beam systems, scientific applications and the instrumentation of the scientific instruments of the European XFEL.Abstract: European XFEL is a free-electron laser (FEL) user facility providing soft and hard X-ray FEL radiation to initially six scientific instruments. Starting user operation in fall 2017 European XFEL will provide new research opportunities to users from science domains as diverse as physics, chemistry, geo-and planetary sciences, materials sciences or biology. The unique feature of European XFEL is the provision of high average brilliance in the soft and hard X-ray regime, combined with the pulse properties of FEL radiation of extreme peak intensities, femtosecond pulse duration and high degree of coherence. The high average brilliance is achieved through acceleration of up to 27,000 electron bunches per second by the super-conducting electron accelerator. Enabling the usage of this high average brilliance in user experiments is one of the major instrumentation drivers for European XFEL. The radiation generated by three FEL sources is distributed via long beam transport systems to the experiment hall where the scientific instruments are located side-by-side. The X-ray beam transport systems have been optimized to maintain the unique features of the FEL radiation which will be monitored using build-in photon diagnostics. The six scientific instruments are optimized for specific applications using soft or hard X-ray techniques and include integrated lasers, dedicated sample environment, large area high frame rate detector(s) and computing systems capable of processing large quantities of data.

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“…Laser shock peening experiments were carried out using the DiPOLE laser system at the Central Laser Facility in UK. DiPOLE is a scalable diode pumped, cryogenic gas cooled, multi-slab ceramic Yb:YAG laser system, capable of generating temporally shaped pulses (2-10 ns in duration) at 1030 nm wavelength up to 10 J at 10 Hz [12]. The output beam has a square 18 mm by 18 mm footprint.…”

Section: Experimental Setup and Theorymentioning

confidence: 99%

Acoustic signature of laser shock peening for a qualitative evaluation of residual stresses

et al. 2019

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Acoustic signals recorded from laser shock peening (LSP) of aluminium, titanium and stainless steel alloys were analysed for different laser pulse widths, energy and confinement conditions. In this paper, we report that different materials and conditions registered unique acoustic signatures. Further, the acoustic signatures in the time domain were transformed to the frequency domain and were fitted to a lognormal distribution, yielding a unique set of parameters for each material and set of conditions. These parameters were benchmarked using the measurements of residual stress by the incremental centre hole-drilling (ICHD) method. Detailed analysis of the acoustic signal reveals that this method once calibrated with few ICHD data, can identify successful peening of materials.

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DiPOLE: a 10 J, 10 Hz cryogenic gas cooled multi-slab nanosecond Yb:YAG laser

Cited by 75 publications

References 14 publications

High-power, Joule-class, temporally shaped multi-pass ring laser amplifier with two Nd:glass laser heads

High-power, Joule-class, temporally shaped multi-pass ring laser amplifier with two Nd:glass laser heads

Photon Beam Transport and Scientific Instruments at the European XFEL

Acoustic signature of laser shock peening for a qualitative evaluation of residual stresses

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