Liquid temperature sensing system based on echo wall mode spherical optical microcavity

A technology of whispering gallery mode and optical microcavity, which is used in thermometers, thermometers, scientific instruments, etc. with physical/chemical changes. problems, to achieve the effect of easy manipulation, easy preparation, and improved sensitivity

Active Publication Date: 2021-01-26
BEIHANG UNIV
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

However, the thickness of the sensitive medium coated on the surface of the microcavity is difficult to control accurately, and the quality factor of the whispering gallery mode optical microcavity made of the sensitive medium is low, which affects the temperature measurement accuracy

Method used

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  • Liquid temperature sensing system based on echo wall mode spherical optical microcavity

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Embodiment Construction

[0017] Below with the accompanying drawings ( figure 1 ) to illustrate the present invention.

[0018] figure 1 A structural schematic diagram of a liquid temperature sensing system based on a whispering gallery mode spherical optical microcavity for implementing the present invention. refer to figure 1 As shown, a liquid temperature sensing system based on the spherical optical microcavity of the whispering gallery mode includes a double-tapered micro-nano optical fiber 3 with a thick part at the left end, a thin part at the middle and a thick part at the right end. The optical microcavity 4 is contact-coupled, the left end thick part is connected to the input single-mode fiber 2, the right end thick part is connected to the output single-mode fiber 5, the double-tapered micro-nano fiber 3 and the whispering gallery mode spherical optical microcavity 4 is packaged in a glass tube 9 filled with isopropanol liquid 7, and the spherical optical microcavity 4 in whispering gall...

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Abstract

The invention discloses a liquid temperature sensing system based on an echo wall mode spherical optical micro-cavity, and the system employs the thermo-optical sensing combination of a micro-nano optical fiber, the echo wall mode spherical optical micro-cavity and isopropanol liquid. A thermo-optical sensing path that the refractive index of the isopropanol liquid is changed due to the change ofthe measured temperature so as to change or move or drift the resonance wavelength of the resonance peak of the micro-cavity is formed, the original high-quality factor characteristic of the echo wallmode optical micro-cavity can be reserved, the temperature sensing sensitivity can be improved, and the accurate measurement of the temperature is further realized.

Description

technical field [0001] The present invention relates to optical fiber device technology, especially a liquid temperature sensing system based on a whispering gallery mode spherical optical microcavity, through the combination of micro-nano optical fiber, whispering gallery mode spherical optical microcavity and isopropanol liquid for thermo-optic sensing, Forming a thermo-optic sensing path that changes the refractive index of the isopropanol liquid due to the change of the measured temperature, thereby causing the resonant peak of the microcavity to change or move or drift, which can not only retain the original high quality factor characteristics of the whispering gallery mode optical microcavity In addition, the sensitivity of temperature sensing can be improved, thereby realizing accurate measurement of temperature. Background technique [0002] Whispering gallery mode optical microcavity is an optical element that confines the light field in a micron-scale space area ba...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01K11/32
CPCG01K11/32
Inventor 丁铭尹贻恒王波涛秦旭东
Owner BEIHANG UNIV
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