Table-top high-energy 7  μm OPCPA and 260  mJ Ho:YLF pump laser

Elu, Ugaitz; Steinle, Tobias; Sánchez, D.; Maidment, Luke; Zawilski, Kevin T.; Schunemann, Peter G.; Zeitner, Uwe D.; Simon-Boisson, Christophe; Biegert, J.

doi:10.1364/ol.44.003194

Cited by 71 publications

(38 citation statements)

References 32 publications

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“…The electron beam duration is 27 fs, but its time of arrival from the linac may jitter by tens to hundreds of femtoseconds, so a pulse length of at least hundreds of femtoseconds to a few picoseconds is needed to cover the jitter for stable operation. Ho:YLF lasers operate at 2 μm and are capable of producing picosecond pulses with hundreds of millijoules of pulse energy, which is more than sufficient for this application [32].…”

Section: Numerical Studymentioning

confidence: 99%

Superradiant amplification in a chirped-tapered x-ray free-electron laser

Duris

Zhang

Huang

et al. 2020

Phys. Rev. Accel. Beams

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The chirp-taper free-electron laser (FEL) scheme has been proposed to generate subfemtosecond broadband pulses using laser-modulated electron bunches in x-ray FELs. In this paper, we extend the chirptaper concept to the postsaturation superradiant regime by combining an energy-modulated beam with a sinelike undulator taper. We show that subfemtosecond duration pulses with peak powers approaching a terawatt may be obtained with typical x-ray FEL parameters such as those at the Linac Coherent Light Source. The method shown here can produce a stable source of attosecond-scale, high-power x-ray pulses suitable for probing electronic dynamics within molecules.

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Section: Numerical Studymentioning

confidence: 99%

Superradiant amplification in a chirped-tapered x-ray free-electron laser

Duris

Zhang

Huang

et al. 2020

Phys. Rev. Accel. Beams

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“…These crystals are not transparent in the NIR, hence require pumping above 2 µm. Recent progresses in Ho ionbased ultrafast amplifier systems [20,[22][23][24] allow direct pumping of OPAs to amplify the pulses in MIR [22,[25][26][27].…”

Section: Introductionmentioning

confidence: 99%

Dispersion management for optical parametric amplifiers in midinfrared

Çankaya¹

2020

Turk J Phys

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Mid-infrared (MIR) is an attractive spectral region for many applications ranging from vibrational spectroscopy to attosecond physics. However, in this spectral region, the dispersion management techniques are not as mature as the ones in the nearinfrared or visible, which is a key ingredient of ultrafast laser technology. In this manuscript, the transfer of dispersion management schemes for optical parametric (chirped pulse) amplifiers (OP(CP)As) from NIR to MIR is discussed. Among those, a scheme based on Martinez type grating stretcher and a bulk compressor is proposed and numerically analyzed. As a case study, the proposed scheme is applied numerically to a 2-µm pumped two-stage OPA system at 4.06 µm. In the model OPA system, the seed pulses are generated by white-continuum in bulk crystal and then amplified via ZGPbased OPAs. Parametric gain bandwidth of the ZGP nonlinear crystal is numerically studied. According to the numerical simulations, 3-mm crystal supports pulses with 26.5 fs pulse duration (FWHM) at 4.06 µm. With the proposed dispersion management scheme, the seed pulses are first stretched inside a Martinez grating stretcher to 1.4-1.6 ps for efficient amplification in OPA stages and then compressed down to the transformlimit inside CaF2 bulk material.

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“…Moreover, their sizes are limited by growth method. Among these crystals, the (ZGP) crystal is commercially available with an aperture up to 1 inch ( ) [44] , so it has been adopted in recent OPCPA systems beyond [40–42] . Unfortunately, most semiconductor crystals, including ZGP, exhibit strong absorption to the well-established pump laser at approximately .…”

Section: Introductionmentioning

confidence: 99%

Toward terawatt few-cycle pulses via optical parametric chirped-pulse amplification with oxide crystals

Liu

Wang

et al. 2019

High Pow Laser Sci Eng

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High-power femtosecond lasers beyond $5~\unicode[STIX]{x03BC}\text{m}$ are attractive for strong-field physics with mid-infrared (IR) fields but are difficult to scale up. In optical parametric chirped-pulse amplification (OPCPA) at mid-IR wavelengths, a nonlinear crystal is vital, and its transmittance, dispersion, nonlinear coefficient and size determine the achievable power and wavelength. OPCPA beyond $5~\unicode[STIX]{x03BC}\text{m}$ routinely relies on semiconductor crystals because common oxide crystals are not transparent in this spectral range. However, the small size and low damage threshold of semiconductor crystals fundamentally limit the peak power to gigawatts. In this paper, we design a terawatt-class OPCPA system at $5.2~\unicode[STIX]{x03BC}\text{m}$ based on a new kind of oxide crystal of $\text{La}_{3}\text{Ga}_{5.5}\text{Nb}_{0.5}\text{O}_{14}$ (LGN). The extended transparent range, high damage threshold, superior phase-matching characteristics and large size of LGN enable the generation of 0.13 TW seven-cycle pulses at $5.2~\unicode[STIX]{x03BC}\text{m}$ . This design fully relies on the state-of-the-art OPCPA technology of an octave-spanning ultrafast Ti:sapphire laser and a thin-disk Yb:YAG laser, offering the performance characteristics of high power, a high repetition rate and a stable carrier–envelope phase.

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Table-top high-energy 7 μm OPCPA and 260 mJ Ho:YLF pump laser

Cited by 71 publications

References 32 publications

Superradiant amplification in a chirped-tapered x-ray free-electron laser

Superradiant amplification in a chirped-tapered x-ray free-electron laser

Dispersion management for optical parametric amplifiers in midinfrared

Toward terawatt few-cycle pulses via optical parametric chirped-pulse amplification with oxide crystals

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