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D-shaped photonic crystal fiber for temperature and refractive index detection

A technology of photonic crystal fiber and refractive index, which is applied in the direction of cladding fiber, optical waveguide light guide, and optical device to transmit sensing components, etc. It can solve the problem that it is difficult to detect without being affected by the outside world, and achieve high sensitivity.

Pending Publication Date: 2021-06-04
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] However, in practical applications, due to the cross-sensitivity of temperature, it is difficult to make the detection unaffected by the outside world

Method used

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  • D-shaped photonic crystal fiber for temperature and refractive index detection
  • D-shaped photonic crystal fiber for temperature and refractive index detection
  • D-shaped photonic crystal fiber for temperature and refractive index detection

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Embodiment Construction

[0025] In order to make the purpose, technical solution and advantages of the present invention clearer, the embodiments of the present invention will be further described below in conjunction with the accompanying drawings.

[0026] Please refer to figure 1 , the embodiment of the present invention provides a D-shaped photonic crystal fiber for temperature and refractive index detection, including a fiber body 10, the cross-section of the fiber body 10 is an inverted "D"-shaped structure, which includes a cladding 13 and In the fiber core, the cladding layer 13 is provided with a first air hole group, a second air hole group and a third air hole group arranged axially along the fiber body 10 and distributed sequentially along the fiber body 10 radial direction , wherein, the first air hole group includes a plurality of first air holes 20, and the plurality of first air holes 20 are arranged at intervals along the circumference of the fiber core, and along the centerline of th...

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Abstract

The invention relates to the technical field of optical fiber sensing, in particular to a D-shaped photonic crystal fiber for temperature and refractive index detection. The photonic crystal fiber comprises a fiber body, the cross section of the fiber body is of an inverted-D-shaped structure, one side of the fiber body is provided with a polishing face arranged in the axial direction of the fiber body, a first gold film layer is laid on the polishing face, and the fiber body comprises a wrapping layer and a fiber core. The wrapping layer is internally provided with a first air hole group, a second air hole group and a third air hole group which are arranged in a penetrating manner along the axial direction of the optical fiber body and are sequentially distributed along the radial direction of the optical fiber body, and the second air hole group is filled with a temperature-sensitive substance. The D-shaped photonic crystal fiber provided by the invention can realize dual detection of the temperature and the refractive index of the liquid to be detected, and has very high sensitivity.

Description

technical field [0001] The invention relates to the technical field of optical fiber sensing, in particular to a D-shaped photonic crystal optical fiber used for temperature and refractive index detection. Background technique [0002] Surface plasmon resonance (SPR) is an optical phenomenon in which electron density oscillations are excited at the metal-dielectric interface by p-polarized light or transverse magnetic waves. Compared with prism-based SPR sensors such as traditional prism structures, SPR sensors based on optical fiber or photonic crystal fiber (PCF) have the advantages of small size, high integration, and low cost, and have shown great potential in the fields of real-time, remote sensing, and distributed measurement. potential. [0003] Photonic crystal fiber is a kind of optical fiber with open design, which can flexibly control the light wave mode, light field distribution and light field area transmitted in the fiber by designing its internal microstructu...

Claims

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Application Information

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IPC IPC(8): G02B6/032G02B6/02G01D5/353
CPCG01D5/3538G02B6/02371G02B6/0239G02B6/032
Inventor 余志华陈澳
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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