AMPLIFYING OPTICAL CAVITY OF THE FABRY-PEROT TYPE

摘要

The invention relates to an amplifying optical cavity of the Fabry-Perot type that can be used in combination with a high-rate picosecond pumped laser for generating monochromatic X-rays. The invention relates to an amplifying optical cavity of the Fabry-Perot type that can be used for obtaining a strongly focused pumped laser beam having a high stability at the average power PMOY. The invention more particularly relates to an amplifying optical cavity (40) of the Fabry-Perot type for generating monochromatic X-rays by the Compton reaction between a high-rate picosecond pumped laser beam (12) and a synchronised electron beam, the cavity including a closed enclosure (42) that can be placed under a vacuum and through which extends an electron beam tube (46), the enclosure (42) including a laser beam input means, a means for maintaining and positioning two planar optical reflectors (M1, M2), and a means for maintaining and positioning two spherical optical reflectors (M3; M4) capable of focusing the laser beam (12) at an interaction point with the electron beam. The means for maintaining and positioning the optical reflectors (M1 - M4) are arranged so that said optical reflectors (M1 to M4) substantially define the vertexes of a tetrahedron.