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Dual transmission peak plasma optical fiber sensor based on asymmetric opening ring structure

A technology of optical fiber sensor and open ring, which is applied in the field of micro-nano optoelectronics and optical fiber sensing, can solve the problems of low measurement accuracy and limited application range, and achieve the effect of improving the measurement range, reducing errors and improving utilization rate

Active Publication Date: 2018-12-28
GUILIN UNIV OF ELECTRONIC TECH
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Problems solved by technology

[0005] What the present invention aims to solve is that the existing optical fiber-based plasma optical sensor has only a single transmission peak, which leads to its limited application range and low measurement accuracy. It provides a dual transmission peak plasma optical fiber sensor based on an asymmetrical open ring structure

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  • Dual transmission peak plasma optical fiber sensor based on asymmetric opening ring structure
  • Dual transmission peak plasma optical fiber sensor based on asymmetric opening ring structure
  • Dual transmission peak plasma optical fiber sensor based on asymmetric opening ring structure

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Embodiment Construction

[0024] 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 combination with specific examples and with reference to the accompanying drawings. It should be noted that the directional terms mentioned in the examples, such as "upper", "lower", "middle", "left", "right", "front", "rear", etc., are only referring to the directions of the drawings. Therefore, the directions used are only for illustration and are not intended to limit the protection scope of the present invention.

[0025] A dual-transmission-peak plasmonic optical fiber sensor based on an asymmetric open ring structure is composed of an optical fiber and a sensing body arranged on the end face of the optical fiber. where sensors such as figure 1 As shown, it is composed of a metal film 1 and a plurality of asymmetric opening ring slit units. The production method of the present invention is to first dep...

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Abstract

The invention discloses a dual transmission peak plasma optical fiber sensor based on an asymmetric opening ring structure. The sensor comprises a metal film and a periodic opening ring slit array structure formed on the metal film, wherein a single periodic structure is composed of left and right opening ring slits, and two opening ring slits having the same inner and outer radius but different central angles are horizontally located on the left and right sides in the middle of the unit. The sensor structure provided by the invention has a dual transmission peak characteristic of a high quality factor and high transmittance in a near-infrared frequency band, and the sensitivity of the sensor can be further improved and the sensor can be operated in two different frequency bands by using the characteristic. At the same time, the purpose of adjusting the spectral position of the dual transmission peak can be achieved by modifying the relevant structural parameters, thereby realizing a plasma optical fiber sensor with a wide working frequency band, wide application range, high sensitivity and easy processing.

Description

(1) Technical field [0001] The present invention relates to the field of micro-nano optoelectronic technology, and belongs to the field of optical fiber sensing, in particular to optical fiber sensing technology based on surface plasmon resonance (SPR), in particular to a double transmission peak plasmonic optical fiber based on an asymmetric open ring structure sensor. (2) Background technology [0002] Surface plasmon is a special electromagnetic wave mode existing on the metal-dielectric surface, which is generated by the collective oscillation of free electrons on the metal surface under the excitation of incident light. This special electromagnetic wave propagates along the direction of the metal surface and decays exponentially in the direction perpendicular to the metal surface. Due to its unique surface wave characteristics, it can confine the light wave to a space whose spatial size is much smaller than its free-space wavelength. area. The property that surface pl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/552
CPCG01N21/553
Inventor 肖功利韦清臣杨宏艳徐俊林杨秀华窦婉滢李海鸥李琦孙堂友张法碧
Owner GUILIN UNIV OF ELECTRONIC TECH
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