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Multi-channel optical fiber refractive index sensor and sensing device

An optical fiber refractive index and sensor technology, applied in cladding optical fibers, instruments, optics, etc., can solve the problems of low sensitivity and complex structure of optical fiber sensors, and achieve the effects of high sensitivity, easy implementation and improved efficiency.

Pending Publication Date: 2022-06-24
BEIJING UNIV OF POSTS & TELECOMM +1
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Problems solved by technology

[0005] The invention provides a multi-channel optical fiber refractive index sensor and sensing device to solve the problems of low sensitivity and complex structure of the optical fiber sensor in the traditional technology

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  • Multi-channel optical fiber refractive index sensor and sensing device

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[0027] In order to make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention. , not all examples. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0028] In the description of the embodiments of the present invention, it should be noted that the terms "center", "portrait", "horizontal", "top", "bottom", "front", "rear", "left", "right" , "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, only for the con...

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Abstract

The invention provides a multi-channel optical fiber refractive index sensor and a sensing device.The multi-channel optical fiber refractive index sensor comprises an optical fiber body, the optical fiber body comprises a fiber core and a cladding which are arranged in sequence, a plurality of through holes are formed in the cladding at intervals, the through holes extend in the length direction of the optical fiber body, and the through holes are communicated with the fiber core; an energy exchange channel is formed between every two adjacent through holes; and the metal film is arranged on the outer wall of the cladding and at least covers each energy exchange channel. According to the multi-channel optical fiber refractive index sensor provided by the invention, a surface plasma effect sensing mechanism is realized by utilizing the metal film, so that the refractive index of liquid to be detected is sensed. The sensor is simple in structure and high in sensitivity, and has a wide application prospect in the fields of biomedicine and environmental science.

Description

technical field [0001] The invention relates to the technical field of optical fiber sensing, in particular to a multi-channel optical fiber refractive index sensor and a sensing device. Background technique [0002] In the field of optical fiber sensing, "how to improve the performance of the sensor and increase the application scenarios of the sensor" has always been a research hotspot. Later, metal was introduced into the structural design of optical fiber sensors, and the surface plasmon resonance (SPR) effect occurred on the metal surface was used to improve the performance of the sensor. [0003] Surface plasmon resonance is a phenomenon caused by the collective oscillation of electrons. When the phase matching condition of the SPR effect is satisfied, the energy of the incident light is coupled with the surface plasmon wave (SPW), resulting in light at the resonance wavelength. The loss increases sharply, resulting in a loss peak on the transmission spectrum. Since ...

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Application Information

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IPC IPC(8): G01N21/41G02B6/02
CPCG01N21/41G02B6/02342G02B6/02371
Inventor 苑金辉张晋槔屈玉玮邱石周娴颜玢玢王葵如桑新柱余重秀
Owner BEIJING UNIV OF POSTS & TELECOMM
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