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Papers by Vadim Tcheremiskine

CLEO/Europe. 2005 Conference on Lasers and Electro-Optics Europe, 2005., 2005

In the quest to reach ultra-intense femtosecond laser pulses with a high contrast of the leading ... more In the quest to reach ultra-intense femtosecond laser pulses with a high contrast of the leading edge, an alternative to all "solid-state only" technology is to use an active gas medium for direct amplification of femtosecond pulses. Unlike solid-state laser systems, a small optical nonlinearity of the gaseous gain medium permits the direct amplification of ultrashort pulses to high intensities (at least up to 10 J) without the need to use a low efficient, complex and costly grating based compressor system at the end of the laser chain. In particular, the excimer XeF(C-A) medium possesses unique properties for amplification because of its broad bandwidth (70 nm centered at 475 nm) spectrally matching the second harmonic of Ti:Sapphire laser, a high saturation energy density (-0.05 J/cm2), and a small stimulated transition cross section (10-'7 cm2). Such properties allow the amplification of ultrashort pulses down to 10 fs transform limited duration and theoretically the achievement peak powers of 4 TW per cm2 of output aperture. In addition, the scalability of the XeF(C-A) active media to higher energy has theoretically no limit due to its gaseous nature. Moreover, since the brightness depends inversely on the wavelength, ultrahigh brightness can be achieved with XeF(C-A) medium at significantly lower power. This advantageous properties motivate the development of a hybrid solid-gas femtosecond high contrast TW laser chain using Ti:Sapphire-based technology for the front-end and the final amplification in the photolitycally driven XeF(C-A) medium [I]. The oscillator consists of a 50 fs Kerr mode-locked Ti :Sa laser running at 950 nm central wavelength. The beam is stretched to the ns domain and further amplified to a few tens of mJ with the help of Optical Parametric Amplification (OPA) technique. Afterwards, a grating compressor restores either the initial femtosecond or picosecond pulse duration depending on the amplification factor in the final XeF(C-A) amplifier. The objective pursued is to ensure a safe low B-integral value (B < 1) in XeF(C-A) active medium. The nonlinear conversion to the double frequency provides the temporal "cleaning" ensuring a very high contrast of pulses injected into a final Joule-level XeF(C-A) amplifier, as well as the spectral matching between the amplification stages. The eventual final compression is done either in a material of the output window of final gas amplifier or by means of a prism-based compressor.

International Conference on Lasers, Applications, and Technologies 2007: Advanced Lasers and Systems, 2007

We present the design of an OPCPA (Optical Parametric Chirped Pulse Amplification) pre-amplifier ... more We present the design of an OPCPA (Optical Parametric Chirped Pulse Amplification) pre-amplifier incorporated in a visible (475 nm) high-contrast multiterawatt femtosecond laser chain based on hybrid (solid/gas) technology.

UVX 2012 - 11e Colloque sur les Sources Cohérentes et Incohérentes UV, VUV et X ; Applications et Développements Récents, 2013

Proceedings of SPIE, …, 2008

Gain characteristics of a photolytically driven XeF (CA) laser amplifier are studied experimental... more Gain characteristics of a photolytically driven XeF (CA) laser amplifier are studied experimentally in the unsaturated amplification regime. The gaseous active medium is optically pumped by the vacuum-ultraviolet (VUV) radiation from two large-area ...

Journal de Physique IV (Proceedings), 2005

Cet article présente la conception d'une chaîne laser femtoseconde TW visible, associant (i) un o... more Cet article présente la conception d'une chaîne laser femtoseconde TW visible, associant (i) un oscillateur solide Ti :Sa opéréà 950 nm, (ii) un amplificateur optiqueà dérive de fréquence permettant l'amplification du signalà 950 nm au niveau de plusieurs dizaines de mJ, (iii) un système doubleur pour convertir le signalà 475 nm et l'injecter dans le milieu amplificateur XeF (C-A), (iv) un milieu gazeux excimères XeF (C-A) permettant l'amplification directe du signalà 475 nmà plusieurs centaines de mJ et ainsi l'obtention d'impulsions TW visiblesà contrasteélevé. * uteza@LP3.univ-mrs.fr; téléphone : 33 4 91 82 92 83; fax : 33 4 91 82 92 89; www.lp3.univ-mrs.fr 1 Rapports d'intensité entre l'impulsion principale et les pieds d'Emission Spontanée Amplifiée (I pulse /I ESA ou contraste incohérent) ou les pré-impulsions laser (I pulse /I pré−post−impulsion ou contraste cohérent).

Le Journal de Physique IV, 1999

Applied Physics B, 2006

The strategy used to develop an innovative high contrast multiterawatt femtosecond laser chain ba... more The strategy used to develop an innovative high contrast multiterawatt femtosecond laser chain based on a hybrid (solid/gas) technology is reported. The laser system includes a Ti:sapphire oscillator generating 50 fs pulses at 950 nm, an optical parametric chirped pulse amplification stage, a second harmonic frequency converter for pulse temporal cleaning, and a final photolytical XeF(C-A) excimer amplifier for direct high peak-power amplification of ultrashort laser pulses in the blue (475 nm) spectral region. Several important issues concerning the design of the laser front-end, the energy extraction and beam phase control in the high peak-power XeF(C-A) amplifier are theoretically addressed. A detailed description of the XeF(C-A) amplifier and careful measurements of its energetic, optical and pumping characteristics are also given, together with the first pilot amplification experiments in the low density XeF(C-A) medium to assert the significance of our approach.

Applied Physics B, 2008

Gain characteristics of a photolytically driven XeF(C–A) laser amplifier are studied experimental... more Gain characteristics of a photolytically driven XeF(C–A) laser amplifier are studied experimentally in the unsaturated amplification regime. The gaseous active medium is optically pumped by vacuum-ultraviolet (VUV) radiation from two large-area multichannel surface discharges initiated along opposite walls of the amplifier chamber. A total gain factor of 102 is obtained for the ultrashort optical pulses under multipass amplification in the

The transport of broadband incoherent radiation through a bleaching medium is analyzed using a di... more The transport of broadband incoherent radiation through a bleaching medium is analyzed using a different analytical treatment. The principal features of the photodecomposition bleaching wave formation are examined for media characterized by uniform initial distribution of decomposing absorbers. Considering a broad-band radiation from uniform planar or cylindrical source with stable radiative characteristics, we show that the problem has an asymptotic stationary solution for the case where the absorption spectrum is nonzero within the bandwidth that leads to decomposition. In more general cases the process dynamics can be adequately described by an asymptotic approach to a stationary solution obtained for properly chosen limits of integration over frequency.

The review summarizes milestones and major breakthrough results obtained in the course of the dev... more The review summarizes milestones and major breakthrough results obtained in the course of the development of a photochemical method applied to optical excitation of gas lasers on electronic molecular transitions by radiation from such unconventional pump sources as high-temperature electrical discharges and strong shock waves in gas. It also describes principles and techniques applied in hybrid (solid/gas) high-intensity laser systems emitting in the blue-green spectral region, and discusses wavelength scaling of laser– matter interaction by the example of laser wake-field acceleration (LWFA), high-order harmonic generation (HHG) and ''water window'' soft X-ray lasers. One of the most significant results of the photochemical method development consists in emerging broad bandwidth lasers (XeF(C–A), Xe 2 Cl, and Kr 2 F) operating in the blue-green spectral range, which have potential for amplification of ultra-short (down to 10 fs) optical pulses towards the Petawatt peak power level. The main goal of this review is to argue that the active media of these lasers may provide a basis for the development of fs systems generating super-intense ultrashort laser pulses in the visible spectral range. Some specific hybrid schemes, comprising solid state front-ends and photodissociation XeF(C–A) power boosting amplifiers, are described. They are now under development at the Lasers Plasmas and Photonic Processes (LP3) Laboratory (Marseille, France), the P.N. Lebedev Physical Institute (Moscow, Russia) and the Institute of High-Current Electronics (Tomsk, Russia) with the aim of conducting proof-of-principle experiments. Some consequences of the visible-wavelength laser field interaction with matter are also surveyed to demonstrate advantages of short driver wavelength in the considered examples. One of the most important consequences is thelebedev.ru (L.D. Mikheev). possibility of coherent soft X-ray generation within the ''water window'' spectral range with the use of short wavelength driver pulses to pump a recombination laser.