Sustained saturation in a free-electron laser oscillator at perfect synchronism of an optical cavity.
Sustained saturation in a free-electron laser oscillator at perfect synchronism of an optical cavity.
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自由电子激光振荡器在光学腔的完美同步下持续饱和。
DOI：
10.1103/physrevlett.86.5707
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发表时间：
2001
影响因子：
8.6
通讯作者：
E. Minehara
中科院分区：
文献类型：
--
作者：
N. Nishimori;R. Hajima;R. Nagai;E. Minehara
本文首次在光学腔完全同步的情况下观察到自由电子激光器（FEL）振荡器的持续饱和现象。同时测量FEL功率和光学腔的绝对失谐长度（deltaL）清楚地表明，FEL效率在deltaL = 0.0+/-1微米处达到最大值，尽管由于众所周知的激光休眠效应，一直认为在deltaL = 0处仅存在瞬态。我们的数值模拟很好地再现了所观察到的效率失谐曲线，并包含了较小的散点噪声效应。
The first observation of sustained saturation in a free-electron laser (FEL) oscillator at perfect synchronism of an optical cavity is presented. A simultaneous measurement of FEL power and absolute detuning length of the optical cavity ( deltaL) has clearly shown that the FEL efficiency becomes maximum at deltaL = 0.0+/-1 microm, although it has been considered that only a transient state exists at deltaL = 0 due to the well-known laser lethargy effect. The observed efficiency detuning curve is well reproduced by our numerical simulation including a small shot-noise effect.