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Multilayer Dielectric Gratings Enable More-Powerful High-Energy Lasers

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Researchers around the world discover new techniques and materials that increase grating size while also increasing the laser-damage threshold.

Bruno Touzet and Dr. John R. Gilchrist, Jobin Yvon Inc.

Over the past 20 years, the use of chirped-pulse amplification has enabled lasers to produce powerful pulses in the femtosecond and picosecond time regime. The development of higher-energy lasers is hampered by a major limiting factor. In general, the compression stage of chirped pulse amplification is based on diffraction gratings — two gratings usually working by reflection. Higher-energy lasers require larger, high-efficiency gratings, but laser-induced damage remains the main obstacle to the realization of such lasers. The traditional holographic gold-coated diffraction gratings...Read full article

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    Published: September 2003
    Glossary
    chirped-pulse amplification
    Chirped pulse amplification (CPA) is a technique used in laser physics to amplify ultrashort laser pulses to high energies without causing damage to the amplifying medium. The method was first proposed by Gérard Mourou and Donna Strickland in the mid-1980s and has since become a fundamental technology in the field of high-intensity laser systems. The basic idea behind chirped-pulse amplification involves stretching the duration of a short laser pulse temporally (chirping) before it...
    Basic ScienceChirped-pulse amplificationCoatingsFeaturesfemtosecond and picosecond time regimeindustrialpulses

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