A Photonic Crystal Optical Fiber Methane Sensor Based on Sensitive Film Coating
A photonic crystal fiber, methane sensor technology, applied in the measurement of phase influence characteristics, etc., can solve the problem of remote distributed real-time monitoring, etc., and achieve the effects of excellent interference spectrum, accurate methane concentration, and reduced loss
Active Publication Date: 2019-04-26
SHENYANG NORMAL UNIV
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Problems solved by technology
At present, there are different types of methane sensors based on semiconductors, thermal catalysis, optical interference, infrared absorption, and electrochemical methods, but none of them can perform remote distributed real-time monitoring, which has brought great limitations to gas monitoring. Therefore, Research on a safe, reliable, and highly sensitive distributed methane concentration remote detection system has significant social and economic benefits
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[0022] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be described in further detail below in conjunction with the embodiments and accompanying drawings. It should be understood that the specific embodiments described here are only used to explain the present invention and are not intended to limit the invention.
[0023] Such as figure 1 As shown, the structure schematic diagram of the photonic crystal fiber methane sensor based on the sensitive film coating provided by the present invention includes a broadband light source 1, a single-mode fiber 2, a 3dB coupler 3, a photonic crystal fiber 4, a mirror 5, and a refractive index matching liquid 6 and a spectrum analyzer 7, the two ports on one side of the 3dB coupler 3 are respectively connected to the broadband light source 1 and the spectrum analyzer 7 through a single-mode fiber 2, and one of the two ports on the other side of the 3dB coupler...
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Abstract
The invention belongs to the technical field of optical fiber sensing, and in particular relates to a photonic crystal optical fiber methane sensor coated with a sensitive film, which consists of a broadband light source, a single-mode optical fiber, a 3dB coupler, a photonic crystal optical fiber, a reflector, a refractive index matching liquid and a spectral sensor. Analyzer composition, the two ports on one side of the 3dB coupler are respectively connected to the broadband light source and the spectrum analyzer through a single-mode fiber, and the two ports on the other side are fused with a photonic crystal fiber through a single-mode fiber, and the other is connected through a single-mode fiber The optical fiber leads to the refractive index matching liquid, and the other end of the photonic crystal fiber is connected to the mirror through a single-mode fiber to form a reflective MZI interference circuit; the outside of the photonic crystal fiber cladding is coated with a cage-shaped molecular sensitive film, and the single The mode fiber, the photonic crystal fiber coated with the cage molecular sensitive film and the mirror together constitute the probe structure of the photonic crystal fiber methane sensor, which can make the photonic crystal fiber sensor realize remote distributed real-time monitoring.
Description
technical field [0001] The invention belongs to the technical field of optical fiber sensing, in particular to a photonic crystal optical fiber methane sensor based on sensitive film coating. Background technique [0002] my country is rich in coal resources and is a major coal producing country in the world. At the same time, it is also one of the regions with the most mining accidents in the world. Coal production is facing very serious safety production problems, and an important source of danger that hinders safe production—gas disasters. A serious hidden danger of death and group injury. Gas is a harmful gas adsorbed in coal and surrounding rock formations, and methane is the main component of mine gas, accounting for about 83-89%. The occurrence of gas accidents has caused huge losses to the property of the country and the people, and has seriously affected the safe production of coal mines. It is imperative to control the occurrence of gas accidents. Among them, the ...
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IPC IPC(8): G01N21/45
CPCG01N21/45
Inventor 高朋于吉
Owner SHENYANG NORMAL UNIV