Arbitrary column vector light generating device and method based on orthogonal polarization modulation

Abstract

The invention discloses an arbitrary column vector light generating device and an arbitrary column vector light generating method based on orthogonal polarization modulation. The arbitrary column vector light generating device comprises a linearly polarized light generating module, an orthogonal polarization modulation module and a light intensity detection module, wherein the linearly polarized light generating module is used for generating linearly polarized incident light satisfying requirements; the orthogonal polarization modulation module is used for performing orthogonal polarization modulation on the linearly polarized incident light to obtain column vector light in an arbitrary polarization state; and the light intensity detection module is used for detecting the obtained column vector light. According to the arbitrary column vector light generating device, left-handed circularly polarized vortex light and right-handed circularly polarized vortex light synthesizing the columnvector light are generated by means of two vortex light generating devices respectively, and the column vector light in an arbitrary polarization state can be obtained through modulating a phase difference between phase diagrams loaded on the two vortex light generating devices; the arbitrary column vector light generating device has the advantages of simple and reasonable light path and high repeatability; and the entire device just needs one beam of light to realize the generation of the column vector light, the energy utilization rate is high, the generated light beam is more stable and thequality is higher.

Description

technical field [0001] The present invention relates to the field of information optics technology, in particular to a device and method for generating arbitrary cylindrical vector light based on orthogonal polarization modulation. Background technique [0002] Polarization is a basic characteristic of light, including two polarization states of uniform polarization and non-uniform polarization. Uniformly polarized light includes common linearly polarized light, circularly polarized light and elliptically polarized light. The biggest commonality between them is the beam cross section The polarization state of each point is the same. Non-uniformly polarized light with uneven polarization spatial distribution is also called vector light. The unique polarization characteristics have made vector light attract people's attention in recent years. Among them, cylindrical vector light with axisymmetric distribution of polarization is particularly eye-catching. And it has many impor...

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Problems solved by technology

These methods have their own advantages in generating cylindrical vector light, but there are still some unavoidable disadvantages, most of them adopt beam splitting modulation and beam recombination, it is difficult to ensure the stability and flexibility of the generated cylindrical vector light , and these experimental systems are complex, and the repeatability is quite difficult

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