A sagnac dual-parameter fiber optic 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, uncompact structure, low temperature sensitivity, etc., and achieve strong anti-interference ability. , the effect of simple structure and high refractive index sensitivity

Active Publication Date: 2020-05-19
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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  • A sagnac dual-parameter fiber optic sensor based on high birefringence micro-nano fiber
  • A sagnac dual-parameter fiber optic sensor based on high birefringence micro-nano fiber
  • A sagnac dual-parameter fiber optic sensor based on high birefringence micro-nano fiber

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[0032] In order to make the objectives, technical solutions, and advantages of the present invention clearer, the following further describes the present invention in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention, but 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 sensor 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 means of optical fiber fusion;

[0035] The Saganc sens...

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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 a high birefringence micro-nano optical fiber. Background technique [0002] The optical fiber sensor uses light waves as the carrier and optical fiber as the medium to realize the transmission and perception of the measured signal. Compared with the traditional sensor, the optical fiber sensor exhibits the advantages of anti-electromagnetic interference, light weight, high sensitivity, and simple structure; With the increasing demand in applications such as biology and medicine, researchers have begun to devote themselves to the research of multi-parameter optical fiber sensing technology. Among them, the realization of temperature and refractive index dual-parameter sensing needs to solve the cross-sensitivity problem of the two has also received extensive attention. [0003] Current fiber optic sensors used fo...

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Application Information

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