Dr. Federico Canova Profile

Dr. Federico Canova

Global Sales Manager, VP

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Publications (3)

Proceedings Article | 31 May 2007 Paper

Wavefront correction and aberrations pre-compensation in the middle of Petawatt-class CPA laser systems

Federico Canova, Lorenzo Canova, Alessandro Flacco, Raphaël Clady, Jean-Paul Chambaret, Fabien Plé, Moana Pittman, Thomas Planchon, Marco Silva, Roberto Benocci, Gianni Lucchini, Dimitri Batani, Emeric Lavergne, Guillaume Dovillaire, Xavier Levecq

Proceedings Volume 6584, 658404 (2007) https://doi.org/10.1117/12.721581

KEYWORDS: Deformable mirrors, Mirrors, Optical amplifiers, Wavefronts, Modulation, Laser systems engineering, Adaptive optics, Phase shift keying, Laser beam propagation, Wavefront sensors

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Proceedings Article | 7 February 2006 Paper

Complete characterization of damage threshold in titanium doped sapphire crystals with nanosecond, picosecond, and femtosecond laser pulses

F. Canova, J.-P. Chambaret, G. Mourou, M. Sentis, O. Uteza, P. Delaporte, T. Itina, J.-Y. Natoli, M. Commandre, C. Amra

Proceedings Volume 5991, 599123 (2006) https://doi.org/10.1117/12.638769

KEYWORDS: Crystals, Titanium, Sapphire, Laser damage threshold, Laser crystals, Femtosecond phenomena, Picosecond phenomena, Polishing, Crystallography, Surface finishing

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The major bottleneck for the development of robust and cost-effective femtosecond amplification systems is the uncertainty concerning the damage threshold of Ti: Sapphire crystals. Up to now, Ti: Sapphire is the only material that supports the generation of temporally short pulses (few femtosecond) at high repetition rates, and overcoming this bottleneck will represent a major advance in laser performance for all the femtosecond community. Currently, when pumped at 532nm, the uncertainty on Ti:Sapphire damage threshold, is about a factor of ten. The empirically estimated threshold is 10J/cm² but for safety reasons the femtosecond laser community (especially the companies producing the lasers) uses the conservative value of 1J/cm². Such a low pumping fluency means low extraction efficiency during the amplification process and a great waste of pumping energy, the most expensive part of a Ti:Sapphire amplifier. In order to remove this bottleneck, we launch a complete analysis of all the factors that influence the damage threshold in Ti:Sapphire Crystals. Our program is to first measure the bulk threshold to define the upper threshold limit, and the influence of Ti ion concentration in the crystal garnet. Then, we will analyze all the surface effects that influence the value of the threshold. These effects depend on the polishing, on the cleaning process, as well as the type of anti-reflective coating. Only a complete understanding of all the mechanisms involved in threshold limitation will allow us to produce Ti:Sa crystals with the best performances. The study of the characteristics of the Ti:Sapphire damage threshold will not be complete and reliable without a complete characterization of the pump beams (temporal and spatial modulations), and this analysis will be done with nanosecond and picosecond pulses at 532nm. Finally, to complete the exploration of the the behavior of the titanium doped sapphire crystal, we will characterize the damage threshold with femtosecond pulses, at 800nm to reach the deterministic dielectric threshold and validate fundamentals models and simulation results. To our knowledges this is the first time that such a complete characterization is done for Ti:Sapphire laser crystals. We will present the first conclusions about the experiments as well as the methods we will employ in our systematic analysis.

Proceedings Article | 7 February 2006 Paper

100 TW ultra-intense femtosecond laser systems

Gilles Cheriaux, Jean Paul Chambaret, Federico Canova

Proceedings Volume 5991, 59911L (2006) https://doi.org/10.1117/12.638813

KEYWORDS: Optical amplifiers, Pulsed laser operation, Laser systems engineering, Femtosecond phenomena, Mirrors, Crystals, Laser crystals, Mode locking, Oscillators, Prisms

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