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Controllable polarization beam splitter based on multi-core coupling optical fiber and substrate switching effect

A polarization beam splitter and multi-core optical fiber technology, applied in the coupling of optical waveguide, light guide, optics, etc., can solve the problems of reducing energy and extinction ratio

Active Publication Date: 2019-11-26
WUHAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In many application systems, in order to couple polarized light into the waveguide structure, it is necessary to add an additional coupler in the optical path, but it will reduce the overall energy and extinction ratio

Method used

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  • Controllable polarization beam splitter based on multi-core coupling optical fiber and substrate switching effect
  • Controllable polarization beam splitter based on multi-core coupling optical fiber and substrate switching effect
  • Controllable polarization beam splitter based on multi-core coupling optical fiber and substrate switching effect

Examples

Experimental program
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Embodiment 1

[0032] This embodiment takes 7 cores as an example, and the principle of multi-core coupling optical fibers with other numbers of cores is the same as that of this embodiment.

[0033] Such as figure 1 and figure 2 As shown, the seven-core coupled optical fiber of this embodiment includes a core 1 and a cladding 2, and a coating layer is arranged outside the cladding 2. The cores 1 are arranged according to a certain rule, that is, the middle core is located in the center of the entire fiber, and the outer The cores are uniformly distributed around the middle core, the core diameter A and core spacing B are 9 µm and 35 µm, respectively, and the cladding diameter is 125 µm. In order to prevent crosstalk between the cores 1 and realize multi-channel signal transmission, a coaxial interferometer 3 with a diameter of 10 µm and a circularly symmetrical structure was prepared by fusion-tapering the seven-core fiber.

[0034] Such as image 3 and Figure 4 As shown, the coaxial ...

Embodiment 2

[0050] A controllable polarization beam splitter based on multi-core coupling optical fiber and substrate switching effect, the multi-core optical fiber is selected as dual-core optical fiber, the substrate is still selected as PDMS material, and other parameters are consistent with the first embodiment.

Embodiment 3

[0052] A controllable polarization beam splitter based on multi-core coupling fiber and substrate switching effect. The multi-core fiber uses fibers with different numbers of cores. The substrate can be made of polymer materials, soft glass materials or metal materials. Other parameters and implementation Example 1 is the same.

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Abstract

The invention provides a controllable polarization beam splitter based on a multi-core coupling optical fiber and a substrate switching effect. The controllable polarization beam splitter comprises acircular-symmetry-structure-based coaxial interferometer obtained by tapering processing of the multi-core coupling optical fiber and a substrate arranged at the bottom of the coaxial interferometer.The multi-core coupling optical fiber includes more than one fiber core and a cladding; the fiber cores are divided into central cores and peripheral cores, wherein the central cores and peripheral cores have the same core diameters; and the core distances between the adjacent fiber cores are the same. The refractive index of the substrate is lower than that of the multi-core coupling optical fiber and is higher than that of the air. The linear polarized light intensity ratio between the central core and the peripheral core is regulated and controlled according to the approaching degree of thesubstrate so as to form optical switch switching and light control effects of the central cores and the peripheral cores. According to the invention, the energy of polarized light of the central coreand the peripheral core is in an opposite state by utilizing the substrate effect; and the distribution of energy in different fiber cores can be controlled by adjusting the inputted polarized lightangle, so that light paths of the multi-core optical fiber are controlled.

Description

technical field [0001] The invention belongs to the field of optical fiber sensing, in particular to a controllable polarization beam splitter based on multi-core coupling optical fiber and substrate switching effect. Background technique [0002] Multicore fibers offer an innovative approach to designing fibers for high capacity applications. Multi-core optical fiber has a wide range of applications: such as subway network systems, radio base stations, connecting data center backplanes, chip communication systems, new optical fiber amplifiers, downhole sensing in oil exploration, and pipeline inspection. Multi-core optical fiber has advantages from saving space to improving the ability of high-speed communication, making it more miniaturized, elastic, flexible and customizable. The small size, spatial distribution of cores, and good thermal stability of multi-core optical fibers make them widely used in the field of optical fiber sensing. [0003] Optical fiber polarizati...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/126G02B6/125G02B6/12G02B6/27
CPCG02B6/12G02B6/125G02B6/126G02B6/2733G02B2006/12145G02B2006/1215
Inventor 胡文彬杨念郭东来杨明红祁耀斌
Owner WUHAN UNIV OF TECH