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Core-crossing microstructure sensing optical fiber

A technology of sensing fiber and microstructure, applied in the direction of cladding fiber, optical waveguide light guide, etc., can solve the problems of unsuitable long-distance use, difficult coupling, and large fusion loss.

Inactive Publication Date: 2011-05-04
XIAN JINHE OPTICAL TECH
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Problems solved by technology

Due to the large transmission attenuation, the optical fiber with this structure is not suitable for long-distance use. On the other hand, the fusion of the optical fiber with this structure and ordinary optical fibers also has problems such as large fusion loss and difficult coupling, which limits the scope of use of the optical fiber with this structure as a sensor.

Method used

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  • Core-crossing microstructure sensing optical fiber
  • Core-crossing microstructure sensing optical fiber
  • Core-crossing microstructure sensing optical fiber

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Embodiment Construction

[0016] figure 1 , 2 It is a cross-sectional and longitudinal cross-sectional schematic view of the microstructured optical fiber according to the present invention. There is an optical fiber core 2 with a slightly higher refractive index in the optical fiber matrix 1, and an optical fiber cladding 3 is formed on the periphery of the optical fiber core 2. In the optical fiber cladding 3, there is a microhole 4 at the position passing through the optical fiber core 2. In the microhole A part of 4 is filled with a refractive index matching liquid 5, and one end of the microhole is an opening, thus forming a microstructured sensing fiber, the optical signal is transmitted in the fiber core 2, and the filled refractive index matching liquid in the microhole 4 The liquid 5 will reduce the loss of the optical signal transmitted in the optical fiber core 2 at the intersection with the microhole 4. When the external physical quantity changes, the air in the cavity 6 in the microhole w...

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Abstract

The invention discloses a core-crossing microstructure sensing optical fiber, wherein a fiber core with higher refractive index is arranged on an optical fiber matrix, a cladding with lower refractive index is arranged on the periphery of the fiber core, at least a part of the micropores which are arranged in the cladding is intersected with the fiber core. The microstructure sensing optical fiber is simple and practical in structure, convenient for use in long distance and for the construction of a distributed sensing system; a plurality of physical quantities such as temperature, stress, pressure, vibration and the like can be measured as long as the slight adjustment is executed; the structure has low requirement to a monitoring instrument so that a selected optical source, a light power meter and a light time domain reflectometer can be used; the microstructure sensing optical fiber is low in operation and use cost, which is suitable for popularization and use.

Description

technical field [0001] The invention relates to a through-core microstructure sensing fiber, more specifically a microstructure sensing fiber with a microhole structure. Background technique [0002] At present, micro-structured optical fiber refers to photonic crystal optical fiber. The structural characteristic of photonic crystal optical fiber is that there is a periodic distribution of micro-pore structure extending infinitely along the optical fiber axis in the cross section. Due to the large transmission attenuation, the optical fiber with this structure is not suitable for long-distance use. On the other hand, the fusion of the optical fiber with this structure and ordinary optical fibers also has problems such as large fusion loss and difficult coupling, which limits the scope of use of the optical fiber with this structure as a sensor. . Contents of the invention [0003] The purpose of the present invention is to provide a core-through microstructure sensing opt...

Claims

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Application Information

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IPC IPC(8): G02B6/02
Inventor 杜兵杜蔚杜迎涛
Owner XIAN JINHE OPTICAL TECH
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