Frequency modulated free electron laser

Campbell, L. T. and McNeil, B. W. J. (2019) Frequency modulated free electron laser. Optics Express, 27 (6). pp. 8792-8799. ISSN 1094-4087 (https://doi.org/10.1364/OE.27.008792)

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Abstract

It is shown that the output frequency of a free electron laser may be modulated to generate a series of modes that span a bandwidth of at least an order of magnitude greater than the normal FEL bandwidth. This new method of frequency modulated FEL operation has close analogies to frequency modulation in conventional cavity lasers. The FM-FEL is analysed and described in the linear regime by a summation over the exponentially amplified frequency modes. Simulations using a 3D, broad bandwidth, numerical code also demonstrate FM-FEL operation for parameters typical of FEL facilities currently under construction. Harmonic bunching methods are used to seed the FM-FEL modes to generate a temporally correlated frequency modulated output over a large bandwidth. This new, FM-FEL mode of operation scales well for X-ray generation, offering users a significantly new form of high-power, short wavelength FEL output.

ORCID iDs

Campbell, L. T. ORCID logoORCID: https://orcid.org/0000-0003-1375-1551 and McNeil, B. W. J. ORCID logoORCID: https://orcid.org/0000-0002-7267-611X;
  • Item type:Article
    ID code:67277
    Dates:
    Date
    Event
    18 March 2019
    Published
    1 March 2019
    Accepted
    18 January 2019
    Submitted
    Notes:Has been highlighted as an Editor's Pick. Editor's Picks serve to highlight articles with excellent scientific quality and are representative of the work taking place in a specific field.
    Subjects:Science > Physics
    Department:Faculty of Science > Physics
    Depositing user: Pure Administrator
    Date deposited:12 Mar 2019 12:22
    Last modified:18 Nov 2024 01:10
    Related URLs:
    URI:https://strathprints.strath.ac.uk/id/eprint/67277
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