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        Phase locking in an infrared short-pulse free-electron laser

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        IconPhase_locking_in_an_infrared_short-pulse_free-electron_laser.pdf (718.1Kb)
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        Author
        Oepts, D.
        Colson, W.B.
        Date
        1990
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        Abstract
        In a free-electron laser operating in the infrared and far-infrared spectral regions and using a radio-frequency accelerator for the electron beam, the electron pulse length can be of the same order as the slippage length or even shorter. Such a laser emits short pulses of multimode broad-band radiation. If the repetition time of the electron pulses is short compared to the round-trip time of an optical pulse in the resonator cavity, then phase locking between successive optical pulses can be induced by an intracavity interferometric device. This causes a reduction of the number of active cavity modes, and leads to a significant increase in the power per mode. External selection of a single mode with reasonable power then becomes possible. The feasibility of the phase-locking procedure has been tested by simulation of the optical pulse evolution in a short-pulse free-electron laser, using a model based on the self-consistent solution of the equations of motion for the electrons and the wave equation driven by single-particle currents. The simulations show that a high degree of coherence between successive pulses can be induced by a low-finesse etalon.
        Description
        The article of record as published may be found at https://doi.org/The article of record as published may be found at http://dx.doi.org/10.1109/3.53390
        Rights
        This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
        URI
        http://hdl.handle.net/10945/61056
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