A system for generating vector beams by combining beams with Wollaston prisms

A Wollaston prism and Gaussian beam technology, applied in optics, optical components, instruments, etc., can solve the problems of difficult processing, affecting the stability of the combined beam, and increasing the difficulty, so as to achieve high generation efficiency, easy adjustment, and improved The effect of stability

Inactive Publication Date: 2011-12-07
BEIJING INSTITUTE OF TECHNOLOGYGY
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Problems solved by technology

[0004] Both the extra-cavity generation method and the intra-cavity vector beam generation method using spatial polarization conversion devices require some specially processed optical components, which are difficult to process and make practical applications more difficult; while using two Most of the methods of coherently combining beams to generate vector beams need to use a beam combining device similar to the Mach-Zehnder interferometer, which affects the stability of the combined beam

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  • A system for generating vector beams by combining beams with Wollaston prisms
  • A system for generating vector beams by combining beams with Wollaston prisms
  • A system for generating vector beams by combining beams with Wollaston prisms

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Embodiment Construction

[0018] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0019] Such as figure 1 As shown, the device of the present invention comprises a laser (1), a polarizer (2), a first beam expander (3), a compound binary amplitude grating (4) of a fork and three forks, a second beam expander (5) , diaphragm (6), focusing lens (7), half-wave plate (8), Wollaston prism (9), quarter-wave plate (10), analyzer (11) and CCD camera (12). The Gaussian beam emitted from the laser (1) passes through a polarizer (2) with a polarization direction of 0° and is transformed into 0° linearly polarized light, which is expanded by the first beam expander (3) and is perpendicularly incident on a On the three-prong compound binary amplitude grating (4), a 3×3 Laguerre-Gaussian beam array is generated, such as figure 2 shown, the horizontal direction is LG 01 and LG 0-1 Beam, vertical direction is LG 03 and LG 0-3 Beam...

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Abstract

The invention provides a system for generating a vector beam by using a Wollaston prism combined beam and belongs to the technical field of photo electricity. The invention consists of a laser, a polarizer, a first beam expander, a one-fork three-fork binary amplitude grating, a second beam expander, a diaphragm, a focusing lens, an one half wave plate, the Wollaston prism, a quarter wavelength plate, an analyzer and a CCD (charge coupled device) camera. The system can efficiently, stably and simply generate the high-purity random vector beam; and two beams of circular polarization spiral beams with opposite polarization rotation directions and opposite spiral phases are combined into one beam by using the Wollaston prism as the core element. The generated vector beam has special characteristics; and the system in the invention has a wide application prospect in the field of micro-nanometer optical and optical communication.

Description

technical field [0001] The invention relates to a system for generating vector beams by combining beams with a Wollaston prism, which belongs to the field of photoelectric technology. Background technique [0002] Polarization is one of the important properties of light. Linearly polarized light and elliptically polarized light are well-known forms of light field, and they have been widely used in many fields. The common feature of linearly polarized light and elliptically polarized light is that the polarization states of each point in the wavefront are the same. In recent years, people have discovered through research that some light beams whose polarization states are non-uniformly distributed according to specific rules have more important value in many application fields. The polarization state of this new type of polarized beam is different at each point in the wavefront, so it is difficult to characterize it with the traditional scalar method. A better characterizati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/28G02B27/09
Inventor 高春清辛璟焘王铮
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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