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A Vector Beam Polarization State Detecting Method

A detection method and polarization state technology are applied in the field of vector beam polarization state detection, which can solve the problems of difficulty in applying high-speed communication systems, immature research on vector beam detection methods, and lack of vector beam polarization state detection methods, so as to improve detection efficiency. Effect

Active Publication Date: 2021-04-20
NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the research on vector beam detection methods is still immature, especially the lack of efficient detection methods for the polarization state of vector beams.
Researchers have proposed a method to detect the polarization state of a vector beam by using a rotating wave plate or a polarizer, but it is difficult to apply it to a high-speed communication system due to the need for multiple measurements

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  • A Vector Beam Polarization State Detecting Method
  • A Vector Beam Polarization State Detecting Method
  • A Vector Beam Polarization State Detecting Method

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Embodiment Construction

[0019] The technical solution of the present invention will be described more clearly and in detail below in conjunction with the accompanying drawings and embodiments, but the protection scope of the present invention is not limited thereto.

[0020] A method for detecting the polarization state of a vector beam, comprising the following steps:

[0021] Use the beam shaping system to adjust the beam of the vector beam to be measured, so that the size of the beam to be measured is adapted to the aperture of the detector;

[0022] The combination of four groups of 1 / 4 wave plates and polarizers with different orientations is placed at the same orientation of the vector beam and at different radial positions to perform polarization transformation on the vector beam to be measured;

[0023] Use the intensity detector to detect the vector beam after polarization transformation, and record the intensity values ​​at different pixel positions;

[0024] The intensity value under the ...

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Abstract

The invention discloses a method for detecting the polarization state of a vector light beam, which belongs to the technical field of polarization state detection of polarized light. The present invention places different combinations of quarter-wave plates and polarizers at different positions in the same orientation of the vector beam, thereby realizing different polarization modulations of the incident beam; using coordinate transformation to solve the measurement results in the same orientation as a group, Obtain the polarization state of the beam in this azimuth; use the regularity of the polarization state distribution of the vector beam to obtain the polarization distribution of the entire beam. The present invention utilizes four sets of wave plates and polarizing plate combinations to obtain the polarization state of the vector light beam with only one measurement, and is more suitable for high-speed or real-time measurement systems.

Description

technical field [0001] The invention relates to the technical field of polarization state detection of polarized light, in particular to a method for detecting the polarization state of a vector beam. Background technique [0002] With the improvement of social informatization, the demand for data transmission has also increased dramatically. In order to solve people's increasing communication needs, researchers have realized the multiplexing of existing communication technologies in multiple dimensions to improve the capacity and spectrum efficiency of communication systems, such as frequency division multiplexing technology, wavelength division multiplexing technology, polarization multiplexing technology and time division multiplexing technology, etc. Even so, existing communication technologies are still unable to meet people's increasing communication needs. [0003] The polarization state of traditional polarized light is uniform, so there are only two orthogonal sta...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01J4/00
CPCG01J4/00
Inventor 李华贵高峰刘旭东李晶
Owner NO 54 INST OF CHINA ELECTRONICS SCI & TECH GRP