Sagnac dual-parameter fiber sensor based on high birefringence micro/nano fiber

A fiber optic sensor, high birefringence technology, applied in the direction of converting sensor output, using optical devices to transmit sensing components, instruments, etc., can solve the problems of low integration, low temperature sensitivity, and uncompact structure, and achieve strong anti-interference ability. , high refractive index sensitivity, simple structure effect

Active Publication Date: 2019-02-22
HUAZHONG UNIV OF SCI & TECH
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Problems solved by technology

[0005] Aiming at the defects of the prior art, the object of the present invention is to provide a Sagnac dual-parameter optical fiber sensor based on high-birefringence micro-nano optical fiber, which aims to solve the problems of low temperature sensitivity and uncompact structure of the existing dual-parameter measurement sensor, which lead to a high degree of integration. lower question

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  • Sagnac dual-parameter fiber sensor based on high birefringence micro/nano fiber
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  • Sagnac dual-parameter fiber sensor based on high birefringence micro/nano fiber

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[0032] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0033] The present invention shows a Sagnac dual-parameter optical fiber sensor based on high birefringence micro-nano optical fiber, such as figure 1 As shown, it includes a broadband light source 1 and a Saganc sensing unit 2 with a built-in high birefringence micro-nano fiber;

[0034] The input end of the Saganc sensing unit 2 is connected to the broadband light source 1, and the output end is connected to the spectrometer 3; the broadband light source 1, the Saganc sensing unit 2 and the spectrometer 3 are all connected to each other by optical fiber fusion;

[0035] The Saganc sensing unit 2...

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Abstract

The invention discloses a sagnac dual-parameter fiber sensor based on a high birefringence micro / nano fiber. The sensor comprises a broadband light source and a Saganc sensing unit with a built-in high birefringence micro / nano fiber. An input end of the Saganc sensing unit receives the broadband light source and outputs a spectral interference signal, since the mode interference and Sagnac interference of a beam in the Sagnac sensing unit have different sensitivities to a refractive index and temperature, the wavelength demodulation of the interference signal of an output spectrum is performed, and the sensing of refractive index and temperature parameters can be achieved. The fiber sensor provided by the invention has the characteristics of all fiber, compact structure, low cost, simple manufacture and low loss, and the sensing of the refractive index and temperature parameters are achieved.

Description

technical field [0001] The invention belongs to the field of optical fiber sensors, and more specifically relates to a Sagnac dual-parameter optical fiber sensor based on high birefringence micro-nano optical fibers. Background technique [0002] Optical fiber sensors use light waves as the carrier and optical fibers as the medium to realize the transmission and perception of the measured signal. Compared with traditional sensors, optical fiber sensors show the advantages of anti-electromagnetic interference, light weight, high sensitivity, and simple structure; With the increase of demand in biological, medical and other application fields, researchers have begun to devote themselves to the research of multi-parameter optical fiber sensing technology, and the realization of temperature and refractive index dual-parameter sensing needs to solve the problem of cross-sensitivity between the two, which has also received extensive attention. [0003] The current optical fiber se...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/353
CPCG01D5/35322
Inventor 夏历阮田甜
Owner HUAZHONG UNIV OF SCI & TECH
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