Radial polarization beam laser

Abstract

The invention discloses a radial polarization beam laser. The radial polarization beam laser comprises an output cavity mirror (101), a pumping source (102), a gain medium (103) and a symmetrical polarization selecting assembly (104). The output cavity mirror is a mirror plane reflecting one part of light emitted by the laser and transmitting the other part of the light emitted by the laser, and the output cavity mirror outputs one part of the laser generated by the laser in a coupling mode and reflects the other part of the light to the laser to maintain laser resonance. The pumping source provides energy for the laser gain medium, and the laser gain medium is excited to jump to a higher energy level. The radial polarization beam laser structurally comprises the pumping source, the gain medium and the symmetrical polarization selecting assembly, wherein the pumping source and the gain medium provide energy for the laser resonance, the symmetrical polarization selecting assembly is composed of a barrel-shaped polarization mold, a reflecting mirror and a conical reflector. Polarization of a beam in a cylindrical symmetry mode can be achieved through the symmetrical polarization selecting assembly, and thus beam output of the radial polarization laser is achieved. The radial polarization beam laser is clear in structure, high in stability and capable of achieving high-power output.

Description

technical field [0001] The invention relates to the technical field of lasers, in particular to a radially polarized beam laser, which is a radially polarized beam laser realized based on symmetric polarization selection. Background technique [0002] The radial polarization state is a special polarization state different from ordinary polarization characteristics, and its electric field is symmetrically distributed around the center of the beam, such as image 3 shown. The special polarization distribution characteristics of radially polarized beams make it have special advantages in many fields, such as laser optical tweezers, laser processing, near-field optics, and high-density optical storage. [0003] At present, most of the radially polarized beam generators reported at home and abroad are in the form of passive conversion. Some active radially polarized beam lasers are also based on high-priced microstructured metal gratings or spatial phase modulators. The structure...

AI Technical Summary

Problems solved by technology

[0003] At present, most of the radially polarized beam generators reported at home and abroad are in the form of passive conversion. Some active radially polarized beam lasers are also based on high-priced microstructured metal gratings or spatial phase modulators. The structure is difficult to realize and the cost is high. There are also certain limitations in achieving high energy output

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