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Alcohol-filling-based high-sensitivity photonic crystal fiber temperature sensor

A technology of photonic crystal fiber and temperature sensor, which is applied in the direction of physical/chemical change thermometers, thermometers, instruments, etc., can solve the problems of low temperature sensor sensitivity, poor anti-interference performance, etc., to improve anti-interference performance and eliminate measurement error, high temperature sensitive effect

Inactive Publication Date: 2013-12-25
SHENYANG NORMAL UNIV
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Problems solved by technology

[0006] Aiming at the problems of low sensitivity and poor anti-interference performance of the existing FLM interference structure temperature sensor, the present invention provides an alcohol perfusion high birefringence photonic crystal fiber optic ring mirror interferometer with high temperature sensitivity, anti-interference, simple structure and easy operation

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  • Alcohol-filling-based high-sensitivity photonic crystal fiber temperature sensor
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Embodiment Construction

[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0022] See attached figure 1 , a high-sensitivity photonic crystal fiber temperature sensor based on alcohol perfusion, which consists of an incident fiber 1 and a receiving fiber 2, an interference arm A3 and an interference arm B4, an outgoing fiber A5 and an outgoing fiber B6, and a 3-dB Composed of coupler 7, 3-dB coupler 8 at the beam combining end 2×2, alcohol perfusion high birefringence photonic crystal fiber 9, and silver reflector 10; two 3-dB coupler 7 at the beam splitting end 2×2 Two ports are respectively connected with the incident fiber 1 and the receiving fiber 2, the other two ports of the 2×2 3-dB coupler 7 at the beam splitting end are respectively connected with the interference arm A3 and the interference arm B4, and the 3-dB coupler 7 at the beam combining end 2×2 The two ports on one side of the -dB coupler 8 ...

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Abstract

The invention discloses an alcohol-filling-based high-sensitivity photonic crystal fiber temperature sensor which mainly solves the problems that the temperature sensor of an existing fiber loop mirror (FLM) interference structure is low in sensitivity, poor in anti-external interference, and the like. The alcohol-filling-based high-sensitivity photonic crystal fiber temperature sensor comprises an incident fiber (1), a receiving fiber (2), an interference arm A (3), an interference arm B (4), an emergent fiber A (5), an emergent fiber B (6), a 3-d coupler B (7) with a beam splitting end being 2*2, a 3-d coupler B (8) with a beam combining end being 2*2, an alcohol filling type high-birefringence photonic crystal fiber (9), and a silver reflecting mirror (10). The 3-d coupler B (7) with the beam splitting end being 2*2, the interference arm B (4), and the 3-d coupler B (8) with the beam combining end being 2*2 form an FLM. The alcohol-filling-based high-sensitivity photonic crystal fiber temperature sensor is high in sensitivity and strong in anti-external electromagnetic interference capability, and can be applied to various practical engineering.

Description

technical field [0001] The invention relates to a high-sensitivity temperature sensor based on a high-birefringence photonic crystal fiber loop mirror, in particular to a high-sensitivity photonic crystal fiber temperature sensor based on alcohol perfusion, and belongs to the technical field of fiber optic sensing. Background technique [0002] Fiber Loop Mirror (FLM) is widely used in fiber optic communication and sensing systems. The two light waves transmitted in opposite directions in the fiber circle formed by the same fiber will have different phase shifts under the action of external factors. Its most typical application is rotation sensing, that is, fiber optic gyroscope. Because it has no moving parts, no nonlinear effects and the lock-up region of the laser gyroscope at low speed, it is very promising to be made into a high-performance and low-cost device. Detection by interference effect is the basic principle of Sagnac interferometer. The fiber optic sensor ba...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K11/32
Inventor 高朋
Owner SHENYANG NORMAL UNIV
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