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Intermediate infrared Bragg fiber and gas qualitative and quantitative detection device thereof

A Bragg fiber, quantitative detection technology, applied in the direction of measurement device, clad fiber, multi-layer core/clad fiber, etc., can solve the problems of test result error, fiber interface loss, etc. good test effect

Active Publication Date: 2020-06-16
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, when using quartz optical fiber to measure the substance to be tested, the sensing optical fiber may need to be replaced each time, and the optical fiber may be fused and cut when detecting multiple substances, which will cause loss of the optical fiber interface and cause errors in the detection results

Method used

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  • Intermediate infrared Bragg fiber and gas qualitative and quantitative detection device thereof
  • Intermediate infrared Bragg fiber and gas qualitative and quantitative detection device thereof
  • Intermediate infrared Bragg fiber and gas qualitative and quantitative detection device thereof

Examples

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Comparison scheme
Effect test

Embodiment 1

[0049] 1. A mid-infrared Bragg optical fiber, the schematic cross-section of which is shown in figure 1 , see side view figure 2 , the described mid-infrared Bragg fiber is an optical fiber with a sulfur-tellurium hollow-core Bragg structure; the mid-infrared Bragg fiber is made of tellurate TZPPN glass layer 2 and chalcogenide As 2 S 5 The cladding area formed by lamination of glass layers 3 and the hollow core area 1 surrounded by the cladding area; wherein, the cladding area is a Bragg structure layer, the first layer of which is a tellurate TZPPN glass layer 2, Chalcogen As 2 S 5 The glass layer 3, by analogy, consists of a tellurite glass layer and a chalcogenide glass layer as a stack, and the Bragg structure layer has five sets of stacks.

[0050] Two rows of through holes 4 are set on the side of the mid-infrared Bragg fiber, each through hole 4 is arranged along the central axis direction of the mid-infrared Bragg fiber, and is evenly arranged on a straight line ...

Embodiment 2

[0066] 1. A mid-infrared Bragg optical fiber with a sulfur-tellurium hollow-core Bragg structure, including a Bragg structure layer and a hollow core area surrounded by a Bragg structure layer. The Bragg structure layer is a stack of tellurate glass layers and chalcogenide glass layers alternately spaced. Cloth; Wherein, the present embodiment selects, and the composition of described tellurite glass layer is TeO 2 ·ZnO·PbO·PbF 2 ·Na 2 O(TZPPN), the composition of the chalcogenide glass layer is As 2 S 5 .

[0067] According to its refractive index comparison, this embodiment designs the chalcogenide glass layer as the first layer of the Bragg structure;

[0068] Specifically, the cladding region of the mid-infrared Bragg optical fiber includes at least 6 layers of glass layers, at least 3 layers of tellurite glass layers and 3 layers of chalcogenide glass layers, distributed in layers. The thickness ratio of the tellurate glass layer and the chalcogenide glass layer is a...

Embodiment 3

[0076] 1. A mid-infrared Bragg optical fiber, the described mid-infrared Bragg optical fiber is an optical fiber with a sulfur-tellurium hollow-core Bragg structure; the mid-infrared Bragg optical fiber is composed of a cladding region formed by lamination of a tellurite glass layer and a chalcogenide glass layer and The hollow area surrounded by the cladding area; wherein, the cladding area is a Bragg structure layer, the first layer of which is a chalcogenide glass layer, the second layer is a tellurite glass layer, and so on, with a layer of chalcogenide glass layer The glass layer and one tellurite glass layer are one set of stacks, and the Bragg structure layer has five sets of stacks.

[0077] Two rows of through holes are arranged on the side of the mid-infrared Bragg optical fiber, each through hole is arranged along the central axis of the mid-infrared Bragg optical fiber and evenly arranged on a straight line parallel to the central axis; The holes are evenly distrib...

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Abstract

The invention, which belongs to the technical field of optics and laser photons, discloses an intermediate infrared Bragg fiber and a gas qualitative and quantitative detection device thereof. The intermediate infrared Bragg fiber comprises a Bragg structure layer and a hollow area formed by the Bragg structure layer in a surrounding manner. The Bragg structure layer is formed by alternately stacking tellurate glass layers and chalcogenide glass layers at intervals; a chalcogenide glass layer and a tellurate glass layer form a group of laminated layers, and at least three groups of laminated layers are arranged on the Bragg structure layer; the intermediate infrared Bragg fiber is provided with two rows of through holes along an axial direction, a plurality of through holes are uniformly distributed in each row, and two corresponding holes in two opposite rows of holes are uniformly distributed on the circumference of the fiber. The optical fiber can detect the position and intensity of an infrared absorption peak in gas, and is high in measurement precision and good in sensitivity. After measurement, gas detection can be realized without replacing the intermediate infrared Bragg fiber.

Description

technical field [0001] The invention relates to the technical field of optics and laser photons, in particular to the technical field of sensing optical fiber and detection device, in particular to a mid-infrared Bragg optical fiber and a gas qualitative and quantitative detection device thereof. Background technique [0002] With the development of technology, fiber optic sensing technology has been widely used. [0003] Optical fiber sensing technology includes two functions of perception and transmission of the substance to be measured. Perception is that the external signal changes the optical fiber transmission signal according to its changing law, and measures the change of optical parameters to perceive the substance to be measured, such as: intensity, wavelength, frequency, etc. . Transmission refers to the process in which the optical fiber transmits the light wave for measuring the substance to be measured to the photodetector. [0004] Among them, the most commo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B6/032G02B6/036G02B6/02G01N21/3504
CPCG01N21/3504G02B6/02309G02B6/032G02B6/036
Inventor 程同蕾王启明李曙光闫欣张学楠张帆
Owner NORTHEASTERN UNIV
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