| 摘要 |
PURPOSE:To generate a laser regardless of the direction of electron beams by mounting an optical fiber and an electron beam source irradiating the optical fiber with relativistic electron beams and emitting Cerenkov beams in the optical fiber. CONSTITUTION:The title laser device consists of an electron accelerator 3 outputting electron beams having high energy and having a large aperture and an optical fiber 1 arranged so that relativistic electron beams 20 emitted from the electron accelerator 2 are applied, and the angle of the direction of the electron beams 20 and the longitudinal direction of the optical fiber 1 is brought to a value such as a right angle. Mirrors 4a, 4b for resonance are evaporated at both ends of the optical fiber 1, and the reflectivity of one mirror 4b for resonance is brought to 100%, and the reflectivity of the other mirror 4a for resonance is made slightly lower than that of the mirror 4b and a laser- beam output is acquired from the mirror 4a side. That is, Cerenkov beams are generated in the optical fiber 1 by the irradiation of free electrons, but they are propagated into the optical fiber 1 without leaking to the outside and stimulated emission is induced. Accordingly, laser beams can be extracted from a terminal. |
