Cherenkov lasers without inversion
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abstract
A novel scheme wherein lasing is attained by a coherent superposition of two electronic states in interfering interaction regions that can suppress stimulated absorption without hampering stimulated emission have been put forward. In the original scheme, an electron beam with mean momentum interacts with wiggler mode in region 1, changes its momentum and interact with wiggler mode in region 2. This paper put forward another scheme, wherein the wigglers are replace by Cherenkov effects. This scheme does not require population inversion in momentum space. Present analysis of Cherenkov and the two-wiggler schemes incorporates a new essential element. The possible application of the scheme for x-ray lasing is discussed.
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Proceedings of 5th European Quantum Electronics Conference