A novel-high energy pulse compression system: generation of multigigawatt sub-5-fs pulses

Nisoli, M.; Stagira, S.; Silvestri, S. De; Svelto, O.; Sartania, S.; Zhao, Chao; Lenzner, M.; Spielmann, Ch.; Krausz, Ferenc

doi:10.1007/s003400050263

Cited by 167 publications

(74 citation statements)

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“…The key ingredient for reducing the pulse duration to few optical cycles at high power levels lies in additional spectral broadening through either (i) nonlinear propagation in hollow-core-fiber (HCF) [2] and laser-induced (co-)filaments [3][4][5] or (ii) ultrabroadband optical parametric amplification (OPA) [6] and OPCPA [7]. However, the main challenge remains in controlling the spectral phase of the ultrabroadband spectrum.…”

Section: Introductionmentioning

confidence: 99%

Mechanism of hollow-core-fiber infrared-supercontinuum compression with bulk material

et al. 2010

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We numerically investigate the pulse compression mechanism in the infrared spectral range based on the successive action of nonlinear pulse propagation in a hollow-core fiber followed by linear propagation through bulk material. We found an excellent agreement of simulated pulse properties with experimental results at 1.8 µm in the two-optical-cycle regime close to the Fourier limit. In particular, the spectral phase asymmetry attributable to self-steepening combined with self-phase modulation is a necessary prerequisite for subsequent compensation by the phase introduced by glass material in the anomalous dispersion regime. The excellent agreement of the model enabled simulating pressure and wavelength tunability of sub-two cycles in the range from 1.5 to 4 µm with this cost-efficient and robust approach.

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Section: Introductionmentioning

confidence: 99%

Mechanism of hollow-core-fiber infrared-supercontinuum compression with bulk material

et al. 2010

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“…Hollow-core fiber based nonlinear broadening of femtosecond pulses generated by commercial systems (Figure 4) can provide this essential ingredient [50][51][52]. Remarkably though a nearly 5-fold increase of the spectral width with respect to that achieved in the inaugural experiments of this technique is essential to achieving superoctave pulses that fulfill the requirements for sub-cycle field synthesis.…”

Section: Synthesis Of Light Fields: the Next Frontiermentioning

confidence: 99%

MAKING OPTICAL WAVES, TRACING ELECTRONS IN REAL-TIME: THE ONSET OF THE ATTOSECOND REALM (Invited Review)

Goulielmakis¹,

Krausz²

2014

PIER

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Abstract-Tracing the dynamics of electrons inside atoms molecules or solids as they occur in real time resides at the forefront of modern science and technology. Advances in attosecond physics over the last decade and beyond are now enabling this essential experimental capability. Here we discuss some of the key developments in light sciences that made possible attosecond metrology and control of electronic processes inside matter on native time scales. These developments hold the promise for new, fundamental insights into the innerworkings of the microcosm as well as the identification of innovative routes for light-based electronic and photonic devices operating at PHz rates.

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“…However, for obtaining such pulses with energies above 100 µJ, pulse amplification (see section 3.2.2) followed by external spectral broadening and pulse compression has to be employed. This has been achieved via self-phase modulation in gas filled hollow core fibers [143] or filaments [144] Lasers Figure 3.6: Shortest achieved pulse duration over the course of the last three decades [139]. Circles denote lasers based on dyes as gain media while triangles denote Ti:S technology.…”

Section: Laser Pulse Productionmentioning

confidence: 99%

Resolving Strong Field Dynamics in Cation States of CO_2 via Optimised Molecular Alignment

Oppermann

2014

Springer Theses

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In this thesis, the role of the molecular structure in strong field induced processes in CO 2 is resolved by the use of optimised impulsive molecular alignment. Two processes were investigated: recollision induced ionisation and the dissociation of the molecular ion CO + 2 . Both processes are driven by the initial tunneling ionisation of CO 2 . Through the use of molecular alignment, the orbital symmetries of the involved molecular ionic states were resolved, revealing the internal molecular dynamics in the form of ionisation and excitation pathways.A novel data analysis procedure was developed to extract the alignment distribution and rotational temperature of the impulsively aligned molecular ensemble. This facilitated the optimisation of molecular alignment in mixed gas samples and was demonstrated for N 2 , O 2 and CO 2 seeded in Ar.The recollision induced or nonsequential double ionisation (NSDI) of CO 2 was then studied in the molecular frame. The process was fully characterised by measuring the shape of the recolliding electron wavepacket and the angularly resolved inelastic electronion recollision cross section. The results reveal the contribution from both the ionic ground and first excited state of CO + 2 to the NSDI mechanism. This study was extended to the strong field induced dissociation of impulsively aligned CO + 2 . It was found that dissociation is driven by a parallel dipole transition from the second excited ionic state B to the predissociating state C, whilst recollision excitation was shown to not play a role. The strong field induced coupling of the ionic states B and C could thus be controlled by the laser polarisation.The results obtained in this thesis further the understanding of population dynamics of cation states in strong field processes. This is of special interest for extending molecular strong field physics to the study of electronic degrees of freedom and their coupling to the nuclear motion. had hoped for in a research degree and I cannot thank Jon enough for making it such an enriching experience, both professionally and personally.

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A novel-high energy pulse compression system: generation of multigigawatt sub-5-fs pulses

Cited by 167 publications

References 0 publications

Mechanism of hollow-core-fiber infrared-supercontinuum compression with bulk material

Mechanism of hollow-core-fiber infrared-supercontinuum compression with bulk material

MAKING OPTICAL WAVES, TRACING ELECTRONS IN REAL-TIME: THE ONSET OF THE ATTOSECOND REALM (Invited Review)

Resolving Strong Field Dynamics in Cation States of CO_2 via Optimised Molecular Alignment

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