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In this paper a curved Bragg reflector is analysed. Its main characteristic is the capability to confine the optical radiation and because of its transparency to an electron beam, it is particularly suitable for compact free-electron laser devices operating in the far infrared and millimetre wave range. Moreover it can be utilised in any kind of stable or unstable resonator. A mathematical method...
We discuss wave-guide Free Electron Laser gain formulae including inhomogeneous broadening and saturation effects. The analysis is not limited to the low gain regime. It is also proven that, after a proper redefinition, most of the empirical formulae exploited for the free space case can be utilised to model the wave-guide evolution.
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