The Michelson resonator free-electron laser - Part 1. Passive mode structure and mode decay

Journal Article · Mon Feb 01 04:00:00 EST 1993 · IEEE Journal of Quantum Electronics (Institute of Electrical and Electronics Engineers); (United States)

DOI:https://doi.org/10.1109/3.199300· OSTI ID:6338601

Szarmes, E B; Madey, J M.J. ^[1]

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1. Duke Univ., Durham, NC (United States)

The authors present a general analysis of the evolution of phase locking in an RF linac-driven Michelson resonator FEL. By undergoing a delay of one RF period in the secondary arm of the interferometer, successive optical pulses can be coupled at the beamsplitter so that they build up from noise with a definite phase relationship. Phase locking is described in terms of longitudinal mode decay by extracting the mode losses directly from the passive frequency response of the resonator. This analysis is shown to be equivalent to a coupled pulse eigenmode analysis in the time domain. However, the frequency domain analysis has a much wider range of application because it can be applied to other resonator configurations with arbitrary mirror detunings. These analyses predict significant mode structure simplification in microsecond macropulses, so that high resolution spectroscopy is feasible on RF linac-driven FEL's. Finally, they describe simulations of the perfectly tuned Michelson resonator FEL from spontaneous radiation to saturation using a one-dimensional pulse propagation code, and demonstrate excellent agreement with the analytical results in the small-signal regime.

• OSTI ID: 6338601
• Journal Information: IEEE Journal of Quantum Electronics (Institute of Electrical and Electronics Engineers); (United States), Journal Name: IEEE Journal of Quantum Electronics (Institute of Electrical and Electronics Engineers); (United States) Vol. 29:2; ISSN 0018-9197; ISSN IEJQA7
• Country of Publication: United States
• Language: English

Related Subjects

42 ENGINEERING
426002* -- Engineering-- Lasers & Masers-- (1990-)
ACCELERATORS
CAVITY RESONATORS
ELECTRONIC EQUIPMENT
EQUIPMENT
FREE ELECTRON LASERS
FREQUENCY ANALYSIS
INTERFEROMETERS
LASERS
LINEAR ACCELERATORS
MEASURING INSTRUMENTS
MICHELSON INTERFEROMETER
MODE LOCKING
RESONATORS
RF SYSTEMS
SPECTROSCOPY
TUNING