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    • 6. 发明授权
    • Method and a device for realizing both high extraction efficiency of laser light from electron beams and femto-second ultra-short in free-electron lasers pulses
    • 用于实现来自电子束的激光的高提取效率和在自由电子激光脉冲中的毫微微秒超短的装置
    • US06970483B2
    • 2005-11-29
    • US10104068
    • 2002-03-25
    • Eisuke MineharaRyoichi HajimaNobuyuki NishimoriRyoji Nagai
    • Eisuke MineharaRyoichi HajimaNobuyuki NishimoriRyoji Nagai
    • H01S3/30H01S3/08H01S3/09H05H7/02H05H7/20H01S3/00
    • H01S3/08H01S3/0903H05H7/02H05H7/20
    • A method for realizing both high extraction efficiency of laser light from electron beams and femto-second ultra-short pulses in a free-electron laser, wherein the peak current of electron pulses from a superconducting or normal conducting linear accelerator serving as a driver for the free-electron laser is adjusted to be greater than a certain lower limit and electron beams are brought into perfect synchronism with light or the time of duration for which the electron pulses are repeated is made longer than the time to saturation of light oscillation (the time during which light is emitted due to the increase of optical output by an amount corresponding to the gain up to the point where the optical output does not increase any more), whereby the oscillation of light is facilitated, wherein the extraction efficiency of laser light from electron beams is increased to exceed the theoretical limit which is expressed by 1/(2 Nw)˜1/(4 Nw) (Nw=the number of undulator periods) of electron beam power or rendered proportional to the square of N, or the number of electrons in a micropulse, and wherein ultra-short pulses of the femto-second range are generated.
    • 一种用于在自由电子激光器中实现来自电子束的激光的高提取效率和毫微微秒级超短脉冲的方法,其中来自用作驱动器的超导或正常导电线性加速器的电子脉冲的峰值电流 自由电子激光器被调整为大于一定的下限,并且使电子束与光完全同步,或者使电子脉冲重复的持续时间比光振荡的饱和时间长(时间 在此期间,由于光输出的增加量与增益相应的光量增加到光输出不再增加的点),由此促进了光的振荡,其中激光的提取效率从 电子束增加到超过由1 /(2 Nw)〜1 /(4 Nw)表示的理论极限(Nw =波动时间的数量) m倍或与N的平方或微脉冲中的电子数成正比,并且其中产生毫微微秒范围的超短脉冲。