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Why ‘Divide and Conquer’ Works in Photonics, Too

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Divided-pulse amplification is a viable alternative to chirped-pulse amplification.

Breck Hitz

Chirped-pulse amplification has become the tried-and-true technique for amplifying short laser pulses, whose peak intensity would damage the amplifying medium if the pulses were amplified directly. In chirped-pulse amplification, a short pulse is stretched and frequency-chirped by a dispersive device — usually a grating pair — and then amplified. Because the peak power in the stretched pulse is reduced, it does not damage the amplifying medium. After amplification, the chirped pulse is compressed to its original shape by another dispersive device, usually another grating pair. Figure 1....Read full article

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    Published: May 2007
    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...
    amplifyingChirped-pulse amplificationlaser pulsesResearch & TechnologyLasers

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