Few-cycle pulses at 400 kHz for electron-ion coincidence experiments

Furch, Federico J.; Birkner, Sascha; Kelkensberg, F.; Giree, Achut; Anderson, Alexandria; Schulz, C. P.; Vrakking, Marc J. J.

doi:10.1364/hilas.2014.hth3b.2

Cited by 5 publications

(10 citation statements)

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“…For pump pulses with picosecond duration, the seed pulse was typically chosen to fit. Re-using of the pump was previously reported by focusing the amplified signal and the depleted pump into an additional nonlinear crystal [13][14][15].…”

Section: Introductionmentioning

confidence: 99%

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Multipass OPCPA system at 100 kHz pumped by a CPA-free solid-state amplifier

et al. 2016

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We present a compact few-cycle 100 kHz OPCPA system pumped by a CPA-free picosecond Nd:YVO₄ solid-state amplifier with all-optical synchronization to an ultra-broadband Ti:sapphire oscillator. This pump approach shows an exceptional conversion rate into the second harmonic of almost 78%. Efficient parametric amplification was realized by a two stage double-pass scheme with following chirped mirror compressor. The amount of superfluorescence was measured by an optical cross-correlation. Pulses with a duration of 8.7 fs at energies of 18 µJ are demonstrated. Due to the peak power of 1.26 GW, this simple OPCPA approach forms an ideal high repetition rate driving source for high-order harmonic generation.

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Section: Introductionmentioning

confidence: 99%

“…In this work, we demonstrate the clean recompression with a pure chirped mirror compressor. Several experiments as coincidence measurments with a reaction microscope [13], photoemission electron microscopy [16,17] or photoelectron spectroscopy [18] can benefit from the increased statistics at repetition rates of 100 kHz or higher.…”

Section: Introductionmentioning

confidence: 99%

Multipass OPCPA system at 100 kHz pumped by a CPA-free solid-state amplifier

et al. 2016

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“…The noncollinear angle was detuned from the magic angle and the above-mentioned calculation was repeated for four different beam waists of 125 µm, 250 µm, 500 µm and 1000 µm. These particular beam sizes were chosen in such a way that the smallest beam is comparable to the physical extension of the pump pulse and in order to cover several experimentally used pump beam sizes [6,8]. For a peak intensity of 40 GW/cm 2 , the pump pulse energies corresponding to the four different beam sizes are 10.5 µJ, 42 µJ, 168 µJ and 672 µJ respectively.…”

Section: Influence Of Detuning the Noncollinear Anglementioning

confidence: 99%

“…In addition, noncollinear phase-matching offers a large gain bandwidth capable of supporting the amplification of few-cycle pulses. Therefore, in recent years noncollinear optical parametric amplification has become the technique of choice to amplify few-cycle pulses at high repetition rates (>>10 kHz) [5][6][7][8][9][10][11]. Furthermore, secondary sources based on noncollinear optical parametric amplifiers (NOPAs) have received increased interest, in particular, in strong field physics and attosecond science [6,[10][11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Numerical study of spatiotemporal distortions in noncollinear optical parametric chirped-pulse amplifiers

Giree¹,

Mero²,

Arisholm³

et al. 2017

Opt. Express

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During amplification in a noncollinear optical parametric amplifier the spatial and temporal coordinates of the amplified field are inherently coupled. These couplings or distortions can limit the peak intensity, among other things. In this work, a numerical study of the spatiotemporal distortions in BBO-based noncollinear optical parametric chirped-pulse amplifiers (NOPCPAs) is presented for a wide range of parameters and for different amplification conditions. It is shown that for Gaussian pump beams, gain saturation introduces strong distortions and high conversion efficiency always comes at the price of strong spatiotemporal couplings which drastically reduce the peak intensity even when pulse fronts of the pump and the signal are matched. However, high conversion efficiencies with minimum spatiotemporal distortions can still be achieved with flat-top pump beam profiles.

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“…The CEP of these Ti:Sapphire oscillators is now routinely stabilized using f-to-2f interferometry [8,9]. Owing to the phase preserving nature of the parametric amplification process itself, CEPstable output pulses are directly achievable [10][11][12].…”

Section: Introductionmentioning

confidence: 99%