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Light polarization state evaluation method and device, application, electronic equipment and medium

A technology of polarization state and evaluation method, which is applied in the field of optical fiber depolarization, polarized light, and polarization degree.

Active Publication Date: 2020-10-23
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] The purpose of the embodiment of the present invention is to provide a method for evaluating the polarization state of light by polarization separation degree, so as to solve the problem that the existing method of measuring the polarization state of light by the degree of polarization cannot quantitatively obtain the type and content of polarized light in the beam, let alone targeted Provide effective guidance for the subsequent processing of polarized light

Method used

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  • Light polarization state evaluation method and device, application, electronic equipment and medium
  • Light polarization state evaluation method and device, application, electronic equipment and medium
  • Light polarization state evaluation method and device, application, electronic equipment and medium

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Embodiment 1

[0045] refer to figure 1 , the present embodiment provides a method for evaluating the polarization state of light, comprising the following steps:

[0046] Step S102, collecting data points on the polarization state of the light to be evaluated on the Poincar sphere;

[0047] Specifically, the polarization state analyzer 8 is used to collect data points of the polarization state of the light to be evaluated on the Poincar sphere. Any elliptically polarized light can use two azimuth angles to represent the polarization state, and the two azimuth angles can be represented by longitude and latitude on the sphere on the Poincar sphere, so a point on the Poincar sphere can represent a polarization state, especially for unpolarized light, its polarization state changes randomly with time, so it needs to be accurately described in time series.

[0048] Points on the equator of the Poincare sphere represent linearly polarized light with different vibration directions; the north pol...

Embodiment 2

[0073] This embodiment provides an application of a method for evaluating the polarization state of light in evaluating the performance of a depolarization device. The method for evaluating the polarization state of light is the method described in Embodiment 1. No more details here.

Embodiment 3

[0075] This embodiment also provides a light polarization state evaluation device, refer to Figure 5 , this embodiment is a virtual device corresponding to Embodiment 1, and the device includes:

[0076] The collection module 10 is used to collect the data points of the polarization state of the light to be evaluated on the Poincar sphere;

[0077] A separation module 20, configured to separate the polarization state data points according to the eight hexagrams of the spatial Cartesian coordinate system;

[0078] Fitting module 30, is used for carrying out Delaunay triangular part algorithm fitting to the polarization state data point in each hexagram limit;

[0079] The first calculation module 40 is used to calculate the sum S of the areas of the triangles within the eight hexagrams obtained by fitting. Delaunay ;

[0080] The second calculation module 50 is used to convert S Delaunay Divide by the total area of ​​the unit Poincar sphere S 0 , to obtain the degree of p...

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Abstract

The invention discloses a light polarization state evaluation method, a light polarization state evaluation device, application, electronic equipment and a medium. The light polarization state evaluation method comprises the steps of: acquiring polarization state data points of to-be-evaluated light on a Bonding ball; separating the polarization state data points according to eight octants of a space rectangular coordinate system; carrying out Delaunay triangular part algorithm fitting on the polarization state data points in each octant; calculating a sum S<Delaunay> of the areas of the triangular parts in the eight octants obtained by fitting; and dividing the S<Delaunay> by the unit Poincare sphere total spherical surface area S0 to obtain a polarization separation degree. Especially for non-polarized light, the polarization state of the non-polarized light changes randomly along with time, and therefore accurate description needs to be conducted in a time sequence. The light polarization state evaluation method is used for quantitatively analyzing the polarization state of the signal light in time, and can provide numerical value reference for improving a depolarizer and improving the precision of an optical fiber sensor. In addition to optical fiber sensing systems, the light polarization state evaluation method can be used in other optical systems (e.g., optical coherencesystems) to quantitatively analyze and evaluate non-polarized light and polarized light.

Description

technical field [0001] The invention relates to the fields of degree of polarization, optical fiber depolarization and polarized light, in particular to a method, application, device, electronic equipment and medium for evaluating the polarization state of light. Background technique [0002] According to the polarization characteristics of light, it can be divided into completely polarized light (three polarization states: linear polarization, elliptical polarization, and circular polarization), completely unpolarized light (such as natural light) and partially polarized light. In fact, a random and disordered collection of polarized light is also unpolarized light. [0003] At present, more and more people pay more and more attention to optical fiber sensors, which play an important role in military, aviation, medical and other fields. But the phase bias of the fiber optic sensor is easily affected by external factors. This is due to the fact that, ideally, single-mode f...

Claims

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Application Information

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IPC IPC(8): G01J4/00
CPCG01J4/00G01J4/04
Inventor 周一览邹康毕然缪立军李楠王磊陈侃舒晓武
Owner ZHEJIANG UNIV
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