Beam expander system capable of simultaneously outputting multiple laser beams with different polarization states

Abstract

The invention discloses a beam expander system capable of simultaneously outputting multiple laser beams with different polarization states. The beam expander system comprises polarization maintaining optical fibers, fiber interfaces, a multi-dimensional adjusting rack, a collimating lens, a beam expanding concave lens, a beam expanding convex lens, a half-wave plate, a rotating snap ring, a depolarized beam splitter and a quarter-wave plate, wherein two liner polarization laser beams are connected into the two fiber interfaces of beam expanders through the polarization maintaining optical fibers; the polarization directions of the two laser beams can be adjusted respectively by rotating the half-wave plate; the depolarized beam splitter is used for beam combination, and cannot change the polarization of incident light, so that the output of two linearly polarized lights with different polarization directions is obtained; then, simultaneous output of richer polarization combinations such as linear polarization and circular polarization can be obtained through the quarter-wave plate. The beam expander system is capable of simultaneously outputting multiple laser beams with different polarization states, so that special requirements on laser polarization experimentally are solved, the number of the beam expanders required experimentally is reduced, the experimental system is simplified, and a large number of resources are saved.

Description

technical field [0001] The invention relates to the field of laser beam expansion, in particular to a beam expander mirror system capable of simultaneously outputting multiple laser beams with different polarization states. Suitable for laser beam expansion. Background technique [0002] In the field of cold atomic physics research, laser is the most important means of manipulating atoms. Beam expanders often act as a bridge between optical systems and physical systems. There are two main functions: 1. Collimating the light; 2. Expanding the beam of the light. These functions play a vital role not only in the process of atom cooling and trapping, but also in the process of atom detection. [0003] The traditional beam expander is a monocular structure with one input port and one output port. In actual experiments, if it is necessary to act on atoms with two frequencies of light, the two kinds of light are generally coupled into the same polarization-maintaining fiber, an...

AI Technical Summary

Problems solved by technology

Although this solves the problem of polarization, it will inevitably mean that the two beams of light do not overlap, which may have a greater impact on the experiment; on the other hand, more beam expanders mean that larger or more windows are required ,

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