Method and system of generating vectorial beams in half-cavity with degrees adjustable

A beam and order technology, applied in optics, lasers, optical components, etc., can solve the problems of difficult adjustment, complex extra-cavity conversion method, and high adjustment accuracy requirements, and achieve the effect of device stability.

Active Publication Date: 2016-04-20
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

Its purpose is to solve the problems such as the difficulty in adjusting the intracavity generation method, and the difficulty in realizing the switching output of vector

Method used

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  • Method and system of generating vectorial beams in half-cavity with degrees adjustable
  • Method and system of generating vectorial beams in half-cavity with degrees adjustable
  • Method and system of generating vectorial beams in half-cavity with degrees adjustable

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Embodiment Construction

[0026] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0027] The invention is mainly used to generate vector beams. Different from conventional polarized light, the vector beam is a new type of beam with a polarization state distributed according to a specific law. The common polarization state distribution methods include radial polarization and angular polarization. A vector beam can be represented by a Jones matrix as:

[0028]

[0029] In the formula, l is the order of the vector beam, when l=0, the above formula represents linearly polarized light. r is the radial coordinate, is the angular coordinate. Φ 0 for when the initial polarization direction, when Φ 0 = 0, it means radially polarized vector beam, when Φ 0 =π / 2 means angularly polarized vector beam. Due to the regular distribution of the polarization state of the vector beam, its polarization state distribution can be determined by adding a rota...

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Abstract

The invention discloses a method and system of generating vectorial beams in a half-cavity with degrees adjustable. The vectorial beam generating system is composed of a main machine, a pump source, a resonant cavity and an outer cavity conversion part. According to the principle, the main machine is used for controlling the pump source and the resonant cavity, the resonant cavity emits vortex beams, the main machine controls the outer cavity conversion part, and the vortex beams are converted into the vectorial beams. According to the method and system of generating the vectorial beams in the half-cavity with the degrees adjustable, the structure is stable, operation is facilitated, and generation of the vectorial beams with different degrees and different polarization state distributions can be achieved. Compared with an existing vectorial beam generating technology, great progress is achieved.

Description

technical field [0001] The invention relates to the field of optoelectronic technology, in particular to a method and system for generating vector beams in a semi-cavity with adjustable orders. Background technique [0002] A vector beam is a new type of beam. Different from common beams, the polarization state distribution at the light field cross section of vector beams is anisotropic. Common vector beams include radially polarized light and angularly polarized light. The vector beam with axisymmetric polarization state distribution is the eigensolution of Maxwell's equations in the cylindrical coordinate system. Therefore, it can also be called polarized vortex beam and axisymmetric polarized beam, etc. The cross-sectional light intensity distribution of the vector beam is also different from that of common laser beams. It is in the shape of a hollow ring with no light intensity at the center due to a polarization singularity. [0003] These characteristics of the vect...

Claims

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Application Information

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IPC IPC(8): H01S3/10G02B27/28
CPCG02B27/286H01S3/10061
Inventor 高春清付时尧史阳
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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