A free-electron laser is able to resonate at two different frequencies, both in free space and in a waveguide. The two waves have positive and negative slippage. We describe the nonlinear interaction between the two waves by a set of partial differential equations which in free space do not require the slowly varying envelope approximation (SVEA). In a waveguide a less restrictive SVEA is applied to each wave. By injecting a small signal at the low frequency, a strong signal and bunching are produced at the high frequency. This effect suggests a new method of generating short wavelength radiation.

Up-frequency conversion in a two-resonant-wave high-gain free-electron-laser amplifier / N. Piovella, V. Petrillo, C. Maroli, R. Bonifacio. - In: PHYSICAL REVIEW LETTERS. - ISSN 0031-9007. - 72:1(1994), pp. 88-91.

Up-frequency conversion in a two-resonant-wave high-gain free-electron-laser amplifier

N. Piovella;V. Petrillo;C. Maroli;R. Bonifacio
1994

Abstract

A free-electron laser is able to resonate at two different frequencies, both in free space and in a waveguide. The two waves have positive and negative slippage. We describe the nonlinear interaction between the two waves by a set of partial differential equations which in free space do not require the slowly varying envelope approximation (SVEA). In a waveguide a less restrictive SVEA is applied to each wave. By injecting a small signal at the low frequency, a strong signal and bunching are produced at the high frequency. This effect suggests a new method of generating short wavelength radiation.
Settore FIS/03 - Fisica della Materia
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Utilizza questo identificativo per citare o creare un link a questo documento: http://hdl.handle.net/2434/751911
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