激光、光学与光子学杂志

A Free-Electron Laser (FEL) is a (fourth time) synchrotron light source making incredibly splendid and short beats of synchrotron radiation. A FEL capacities and acts from numerous points of view like a laser, yet rather than utilizing invigorated outflow from nuclear or sub-atomic excitations; it utilizes relativistic electrons as an addition medium. Synchrotron radiation is produced as a lot of electrons go through an attractive design (called undulator or wiggler). In a FEL, this radiation is moreover upgraded as the synchrotron radiation re-associates with the electron pack to such an extent that the electrons begin to produce soundly, accordingly permitting a dramatic expansion in general radiation force. [