Phys. Rev. Lett. 70, 3412–3415 (1993)Experimental observation of limit-cycle oscillations in a short-pulse free-electron laserReceived 10 March 1992; published in the issue dated 31 May 1993 The first experimental observation of limit-cycle power oscillations in a short-pulse free-electron laser is presented. These are due to a nonlinear modulation of the optical micropulse shape and phase by the electrons, which leads to the formation of a train of subpulses. Experimentally, the oscillations have been found to depend on the slippage distance and on the desynchronism between optical pulses and electron bunches, comparing well with theoretical predictions. © 1993 The American Physical Society URL:
http://link.aps.org/doi/10.1103/PhysRevLett.70.3412
DOI:
10.1103/PhysRevLett.70.3412
PACS:
41.60.Cr
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