J.-F. Ripoche

École Polytechnique

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A. Mysyrowicz

École Polytechnique

B. Prade

École Polytechnique

M. Franco

Pontificia Universidad Javeriana

H. Lange

TU Dresden

R. Lange

Laserline (Germany)

G. Grillon

École Nationale Supérieure de Techniques Avancées

Erik T. J. Nibbering

Max-Born-Institute for Nonlinear Optics and Short Pulse Spectroscopy

A. Chiron

Laboratoire Leprince-Ringuet

M. Franco

Laboratoire d'Optique Appliquée

P. Agostini

National Agency for New Technologies, Energy and Sustainable Economic Development

Cooperative Institutions

École Polytechnique

Centre National de la Recherche Scientifique

Laboratoire d'Optique Appliquée

École Nationale Supérieure de Techniques Avancées

Commissariat à l'Énergie Atomique et aux Énergies Alternatives

CEA Paris-Saclay

Laboratoire Interactions, Dynamiques et Lasers

Sorbonne Université

Laboratoire pour l'utilisation des lasers intenses

Centre National pour la Recherche Scientifique et Technique (CNRST)

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Temporal evolution of selfguided femtosecond laser pulses in the presence of Kerr-nonlinearity and ionisation

Springer series in chemical physics (1998)

H. Lange J.-F. Ripoche A. Chiron B. Lamouroux M. Franco

10.1007/978-3-642-72289-9_35

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Spectral analysis of ultrashort pulses after nonlinear propagation

AIP conference proceedings (1997)

R. Lange J.-F. Ripoche M. Franco G. Grillon B. Prade

The spectrum of intense femtosecond optical pulses after propagation through transparent nonlinear medium contains precious information on the phase and amplitude of the optical pulse, provided the nonlinear response of the medium is known. Alternatively, knowing the phase and amplitude of the optical pulse, it is possible to extract with high accuracy the nonlinear Kerr response of the medium. Examples of pulse characterisation and determination of Kerr coefficients of different solids, liquids, and gases will be presented. A particular interesting phenomenon occurs in air, where spontaneous revivals of the nonlinearity are observed well after the passage of the pulse.

Nonlinear medium

Self-phase modulation

Femtosecond pulse

10.1063/1.51838

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Reconstruction of the time profile of femtosecond laser pulses through cross-phase modulation

IEEE Journal of Selected Topics in Quantum Electronics (1998)

H. Lange M.A. France J.-F. Ripoche B. Prade Philippe Rousseau

Experimental results concerning the determination of the time profile of femtosecond laser pulses are presented. The method is based on the analysis of the changes of the laser spectrum induced at different delays by cross-phase modulation. Pulses from a 30-fs Ti:sapphire laser at 800 nm are characterized over a high dynamic range. Second-harmonic pulses at 400 nm from the same laser are also characterized, exhibiting the expected improvement in contrast ratio.

Modulation (music)

Ti:sapphire laser

10.1109/2944.686735

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Citations (20)

High-Order Harmonic Generation and Quasi-Phase-Matching With Self-Guided Femtosecond Laser Pulses

Springer series in chemical physics (1998)

H. Lange J.-F. Ripoche A. Chiron B. Prade P. Breger

Self-phase modulation

Frequency Conversion

10.1007/978-3-642-72289-9_115

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Increased Coherence Length in High Order Harmonic Generation by a Self-Guided Beam

H. Lange A. Bouhal J.-F. Ripoche A. Mysyrowicz P. Breger

High-order harmonics as a potential source of coherent XUV have resulted in extensive studies of this effect. One of the limitations to the efficiency of the generation process is the phase shift occurring at the focus of a gaussian beam (Goyd factor) [1]. This can be minimized by using long focal length and setting the atomic jet either before or after the focus. Self-guided beams are an attractive alternative to focused beams since they can, in principle, be made intense enough while their phase front remains flat in the high intensity region. This is because the curvatures of the wavefront due to diffraction and the Kerr effect compensate each other.

Gaussian beam

Extreme ultraviolet

10.1364/hfsw.1997.the15

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Exact measurement of the temporal profile of intense femtosecond laser pulses

HAL (Le Centre pour la Communication Scientifique Directe) (1998)

J.-F. Ripoche

Source

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How to characterize intense femtosecond lasers pulses by cross-phase modulation

J.-F. Ripoche R. Lange M. Franco B. Prade A. Mysyrowicz

Summary form only given. With the rapid progress in femtosecond laser technology, the accurate measurement of pulse time profile becomes a more and more important issue. Several diagnostics techniques have been demonstrated, which go beyond the 2/spl omega/ autocorrelation method. We show in this presentation that methods based on spectrally resolved cross-phase modulation (XPM) provide a powerful and simple tool for femtosecond pulses analysis. Two distinct physical processes are exploited: multiphoton ionization (MPI) in a neutral gas or instantaneous optical Kerr effect (OKE) in a transparent solid.

Modulation (music)

Self-phase modulation

10.1109/cleo.1998.676003

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Increased Coherence Length in High-Order Harmonic Generation by a Self-Guided Beam

Springer eBooks (1998)

H. Lange A. Chiron A. Bouhal J.-F. Ripoche P. Breger

10.1007/978-1-4757-9241-6_12

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Citations (1)

Determination of the duration of UV femtosecond pulses

Optics Communications (1997)

J.-F. Ripoche B. Prade M. Franco G. Grillon R. Lange

Pulse duration

10.1016/s0030-4018(96)00528-7

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Citations (8)

How to measure femtosecond pulses

AIP conference proceedings (1998)

M. Franco J.-F. Ripoche H. Lange J. P. Chambaret Philippe Rousseau

We discuss techniques allowing to measure the duration of ultrashort laser pulses. In particular, a new method is described, which recovers the phase, amplitude and absolute intensity of femtosecond pulses, allowing to reconstruct the temporal pulse profile with femtosecond resolution. It is based on the spectral analysis, at different time delays, of a probe pulse experiencing cross-phase modulation induced by a pump pulse.

Temporal resolution

Pulse duration

10.1063/1.55248

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Citations (2)