Longitudinal Coherence Preservation and Chirp Evolution in a High Gain Laser Seeded Free Electron Laser Amplifier | Zendy

J.B. Murphy | Zendy; Juhao Wu | Zendy; Xijie Wang | Zendy; Takumi Watanabe | Zendy

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Longitudinal Coherence Preservation and Chirp Evolution in a High Gain Laser Seeded Free Electron Laser Amplifier

Author(s) -

J.B. Murphy,

Juhao Wu,

Xijie Wang,

Takumi Watanabe

Publication year - 2006

Publication title -

osti oai (u.s. department of energy office of scientific and technical information)

Language(s) - English

Resource type - Reports

DOI - 10.2172/883267

Subject(s) - chirp , laser , physics , free electron laser , optics , pulse duration , coherence (philosophical gambling strategy) , coherence time , amplifier , cathode ray , high gain antenna , time evolution , electron , optoelectronics , quantum mechanics , cmos

In this letter we examine the start-up of a high gain free electron laser in which a frequency-chirped coherent seed laser pulse interacts with a relativistic electron beam. A Green function formalism is used to evaluate the initial value problem. We have fully characterized the startup and evolution through the exponential growth regime. We obtain explicit expressions for the pulse duration, bandwidth and chirp of the amplified light and show that the FEL light remains fully longitudinally coherent

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