Dual-coupling structure-based single-mode core-dislocated fiber temperature measurement method

A dislocation optical fiber and temperature measurement technology, which is applied in the field of single-mode dislocation optical fiber temperature measurement, can solve the problems of unguaranteed temperature sensor system research, complex optical path and signal processing system, irregular optical signal attenuation, etc. Compact structure and low power consumption

Inactive Publication Date: 2015-11-25
HENAN NORMAL UNIV
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Problems solved by technology

Since the output signal will be affected by optical fiber transmission loss, splicing loss, optical fiber vibration and multiple external environments, it will seriously cause the irregularity of optical signal attenuation
Double-beam interference fiber optic sensors, multi-mode interference fiber optic sensors and digital interference fiber optic sensors have been gradually applied in the field of temperature measurement, but there are still many shortcomings, such as strict requirements on the performance of light sources and optical fibers, optical paths and signal processing. The system is complex and many factors need to be considered
Due to the complexity of interference, the signal detected by the sensor is very weak, the temperature resolution is not high, and the stability is poor, all of which lead to increased cost and no guarantee for the research of the temperature sensor system

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[0012] The above-mentioned contents of the present invention are described in further detail below through the embodiments, but this should not be interpreted as the scope of the above-mentioned themes of the present invention being limited to the following embodiments, and all technologies realized based on the above-mentioned contents of the present invention all belong to the scope of the present invention.

[0013] A method for measuring temperature based on a single-mode dislocation optical fiber with a double-coupling structure. Based on the interference theory of light, the optical signal emitted by the 980nm pump light source 1 first passes through the 980 / 1550nm wavelength division multiplexer 2 (WDM) and the multi-turn single-mode doped The erbium fiber ring 3 passes through the optical isolator 4, and then the optical signal passes through the structure of the single-mode dislocated optical fiber 5, passes through the optical fiber circulator composed of the first opt...

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Abstract

The invention discloses a dual-coupling structure-based single-mode core-dislocated fiber temperature measurement method. Based on a core-dislocated fiber structure, interferential optical signals pass through a coupler to generate the laser light of a particular wavelength. After that, the wavelengths of the laser light outputted at different temperatures correspondingly are analyzed, and then the performance of a temperature sensing system is studied. The dual-coupling structure is high in resolution rate, stable in performance and high in sensitivity.

Description

technical field [0001] The invention belongs to the technical field of single-mode dislocation optical fiber temperature measurement, and in particular relates to a method for measuring temperature based on a double-coupling structure single-mode dislocation optical fiber. Background technique [0002] At present, the research on optical fiber sensors based on interference theory has achieved many research results, but there are still many problems to be solved urgently. Since the output signal will be affected by optical fiber transmission loss, splicing loss, optical fiber vibration and multiple external environments, it will seriously cause the irregularity of optical signal attenuation. Double-beam interference fiber optic sensors, multi-mode interference fiber optic sensors and digital interference fiber optic sensors have been gradually applied in the field of temperature measurement, but there are still many shortcomings, such as strict requirements on the performance...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K11/32
Inventor 王芳朱晗王旭李云鹏于坤郭彩霞刘玉芳李蕾
Owner HENAN NORMAL UNIV
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