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Elliptical polarization maintaining fiber extinction ratio measuring device and method

A technology of ellipsometric polarization and measuring devices, which is applied in the field of optical fibers and can solve problems such as inapplicability

Active Publication Date: 2018-08-14
BEIJING JIAOTONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The invention provides a measuring device and method for the extinction ratio of an elliptical polarization-maintaining optical fiber to overcome the problem that the existing extinction ratio measurement method is not applicable to an elliptical polarization-maintaining optical fiber

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  • Elliptical polarization maintaining fiber extinction ratio measuring device and method
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  • Elliptical polarization maintaining fiber extinction ratio measuring device and method

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Embodiment Construction

[0031] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0032] Those skilled in the art will understand that unless otherwise stated, the singular forms "a", "an", "said" and "the" used herein may also include plural forms. It should be further understood that the word "comprising" used in the description of the present invention refers to the presence of said features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, Integers, steps, operations, elements, components, and / or groups thereof. It will be understoo...

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Abstract

The invention discloses an elliptical polarization maintaining fiber extinction ratio measuring device and method. The device includes a wide-spectrum light source, a polarizer, a polarization controller, a fiber to be measured, a polarization analyzer, a fiber adapter and a computer that are sequentially connected. The wide-spectrum light source forms linearly polarized light with a high extinction ratio through the polarizer, the polarization analyzer is combined with the polarization analyzer, so that the polarization state input to the fiber to be measured is consistent with the polarization intrinsic state of the fiber, and then the stokes parameter changes of the Poincare sphere are recorded, the variance of the power of the polarization intrinsic state and the power of another polarization intrinsic state orthogonal to the polarization intrinsic state, and the extinction ratio of the fiber to be measured at the length is obtained; the decibel difference of the two extinction ratios before and after the shearing can be obtained by a shearing method to be used as the extinction ratio decibel difference of the fiber to be measured. The device and method can measure the extinction ratio of the elliptical polarization maintaining fiber, and can also be used for measuring the extinction ratio of a conventional polarization-maintaining fiber.

Description

technical field [0001] The invention relates to the field of optical fiber technology, in particular to a measuring device and method for the extinction ratio of an elliptical polarization-maintaining optical fiber. Background technique [0002] Polarization maintaining fiber is widely used in fiber optic gyroscope, fiber optic hydrophone, coherent optical communication, fiber optic sensing and other fields. Elliptical polarization-maintaining fiber is a new type of polarization-maintaining fiber. It is drawn by controlling the rotation of the polarization-maintaining fiber preform during drawing. It can meet the application requirements of circular polarization-maintaining devices in the field of optical fiber sensing. Therefore, , The elliptical polarization maintaining fiber is also called high birefringence spun fiber, which can maintain the stable transmission of the elliptical polarization state, and is a key component of systems such as fiber optic current transformer...

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Application Information

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IPC IPC(8): G01M11/02
CPCG01M11/33
Inventor 吴重庆曹乾尧
Owner BEIJING JIAOTONG UNIV
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