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Microprobe type hygrometer based on Fabry-Perot interferometer and manufacturing method thereof

A technology of a Perot interferometer and a manufacturing method, which are applied in the field of micro-probe hygrometer and its manufacture, can solve the problems of low mechanical strength, low nonlinear sensitivity, temperature cross-sensitivity, etc. of a fiber grating humidity sensor, and achieve a wide range of applications , The effect of good measurement accuracy and small size

Inactive Publication Date: 2009-12-30
CHONGQING UNIV
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Problems solved by technology

However, this long-period fiber grating humidity sensor has disadvantages such as low mechanical strength, temperature cross-sensitivity, small measurement range, and low nonlinear sensitivity, which are subject to many limitations in practical applications.

Method used

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  • Microprobe type hygrometer based on Fabry-Perot interferometer and manufacturing method thereof
  • Microprobe type hygrometer based on Fabry-Perot interferometer and manufacturing method thereof
  • Microprobe type hygrometer based on Fabry-Perot interferometer and manufacturing method thereof

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Embodiment Construction

[0024] attached figure 1 A specific structural diagram of using MM-HNA-5 multimode photonic crystal fiber for large numerical aperture multimode photonic crystal fiber 3, ordinary single mode fiber 1, large core diameter hollow core fiber 2 and MM-HNA-5 multimode photonic crystal The fibers are welded and fixed in sequence; the outer diameter of the ordinary single-mode fiber 1 is 125 μm, the core diameter is 8 μm, the outer diameter of the large-core hollow-core fiber 2 is 125 μm, and the inner diameter is 40 μm, MM-HNA-5 multimode photonic crystal fiber The outer diameter of the fiber is 115 μm, and the core diameter is 5 μm; an interference cavity is formed inside the large core diameter hollow core fiber 2, and the hydrogel filler 4 is filled in the interference cavity of the large core diameter hollow core fiber 2; MM-HNA-5 The length of the multimode photonic crystal fiber is less than the length of the large core diameter hollow core fiber 2, and the length of the MM-HN...

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Abstract

The invention discloses a microprobe type hygrometer based on a Fabry-Perot interferometer and a manufacturing method thereof; the microprobe type hygrometer comprises a general mono-mode optical fiber, a large-core diameter hollow-core optical fiber, a big numerical value bore diameter multi-mode photonic crystal optical fiber which are welded and fixed in succession; the hollow core of the large-core diameter hollow-core optical fiber is internally filled with hydrogel stuffing; the length of the big numerical value bore diameter multi-mode photonic crystal optical fiber is less than that of the large-core diameter hollow-core optical fiber; and an air hole on an outer cladding of an exposed end of the big numerical value bore diameter multi-mode photonic crystal optical fiber forms a through hole. The invention also discloses the manufacturing method for the hygrometer. The invention has the beneficial technical effects that the novel hygrometer is simple and convenient to operate, better in measurement accuracy, and small and exquisite in volume, and has wide application range.

Description

technical field [0001] The invention relates to a sensor and a manufacturing method thereof, in particular to a microprobe type hygrometer based on a Fabry-Perot interferometer and a manufacturing method thereof. Background technique [0002] At present, in warehouses, museums, libraries, computer centers and some factories (such as the microelectronics industry), it is necessary to monitor changes in humidity in the air at any time to ensure that important properties such as food, articles, and materials are not affected by moisture and mildew. , so the measurement of environmental humidity has important practical significance, and the research and development of new humidity sensors is becoming more and more important, and has attracted extensive attention of scholars at home and abroad. [0003] Traditional hygrometers have poor resistance to electromagnetic interference, are not suitable for long-distance measurement, and are limited in small volume areas. The most impor...

Claims

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Application Information

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IPC IPC(8): G01N21/41G02B6/02G02B6/255
Inventor 朱涛徐敏饶云江
Owner CHONGQING UNIV
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