An ultrashort-pulse fiber-based cold molecular photofragmentation device

Abstract

The application discloses a cold molecule optical association device based on supercontinuum fiber, and relates to the technical field of laser physics, which comprises the following components: an optical dipole trap laser (1) is used for outputting high-power laser to form an optical dipole trap; the laser is shot into a first double-color mirror (9); a titanium-sapphire laser (2) and a semiconductor laser (3) are used for emitting different molecular association beams; the association beams are combined by a polarization beam splitter (4) and then combined with a detection laser (5) to form a detection light beam; the four light beams are combined by the first double-color mirror (9) and then coupled into the same supercontinuum fiber (7) through an aspheric mirror (6); the four light beams output by the supercontinuum fiber (7) are expanded by a set of lens groups (10) and then focused on an atomic group (12) in a vacuum cavity (8) through an achromatic lens (11); and the number of atoms is obtained. The application can not only ensure complete coincidence of two light beams but also realize coincidence of multiple light beams, and the experimental operation is simple. The application further solves the above technical problems in the prior art.

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