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Optical fiber humidity sensor based on molybdenum diselenide and preparation method thereof

A technology of humidity sensor and molybdenum diselenide, which is applied in instruments, scientific instruments, and material analysis through optical means, can solve the problems of insufficient precision, complex structure, and difficult preparation, and achieve low production cost and linear correlation High, anti-electromagnetic interference effect

Active Publication Date: 2017-06-27
JINAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although this patent has high sensitivity and resolution, it not only has a complex structure and is not easy to prepare, but also has a nonlinear response to humidity and lacks precision.

Method used

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  • Optical fiber humidity sensor based on molybdenum diselenide and preparation method thereof
  • Optical fiber humidity sensor based on molybdenum diselenide and preparation method thereof
  • Optical fiber humidity sensor based on molybdenum diselenide and preparation method thereof

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Embodiment 2

[0045] Figure 7 A method for preparing an optical fiber humidity sensor based on molybdenum diselenide is shown in Embodiment 2 of the present invention, comprising the steps of:

[0046] S1. Preparation of side-polished single-mode optical fiber: by polishing, a part of the cladding 110 and the fiber core 120 of the optical fiber are removed, and a flat area of ​​a certain length is formed on the surface of the optical fiber, that is, the polished surface 300; the side-polished The thickness of the polished surface 300 of the optical fiber 100 is 67 μm (a part of the fiber core 120 is also polished at this time), and the length of the polished surface 300 is 16 mm;

[0047] S2. Depositing a molybdenum diselenide film layer 200: as figure 2 , use UV glue to fix the side polishing part on the glass slide 400, with the polishing surface 300 facing up, and then use UV glue to make a groove 500 around the polishing surface 300, the size of the groove 500 is 2×0.5×0.1 cm 3 , d...

Embodiment 3

[0050] The steps of embodiment 3 are basically the same as those of embodiment 2, both of which use single-mode optical fiber as the preparation method of side-polished optical fiber 100, the difference lies in:

[0051] The polishing surface 300 has a thickness of 60 μm and a length of 15 mm;

[0052] Use UV glue to make a groove 500 around the polishing surface 300 with a size of 4.5×2×0.5 cm 3 ;

[0053] The molybdenum diselenide dispersion concentration is 10mg / ml;

[0054] The molybdenum diselenide film layer 200 has a thickness of 496nm.

Embodiment 4

[0056] A kind of preparation method based on optical fiber humidity sensor, comprises the steps:

[0057] S1. Preparation of side-polished multimode optical fiber: by polishing, a part of the cladding 110 and the fiber core 120 of the optical fiber are removed, and a flat area of ​​a certain length is formed on the surface of the optical fiber, that is, the polished surface 300; the polished surface 300 and the optical fiber The distance between the fiber core 120 is 1.5 μm, and the length of the polishing surface 300 is 17 mm;

[0058] S2. Depositing the molybdenum diselenide film layer 200: use UV glue to fix the side polishing part on the glass slide 400, with the polishing surface 300 facing up, and then use UV glue to make a groove 500 around the polishing surface 300, The slot size is 4.5×2×0.5 cm 3 , drop the molybdenum diselenide dispersion liquid into the tank, place it at room temperature, wait until the water and alcohol evaporate naturally, and form a molybdenum ...

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Abstract

The invention relates to the field of optical fiber sensing technology, and discloses an optical fiber humidity sensor based on molybdenum diselenide. The optical fiber humidity sensor comprises a side edge polishing optical fiber and a molybdenum diselenide film, wherein the side edge polishing optical fiber comprises a cladding and a fiber core, the cladding is partially polished and treated to form a polishing surface, and the molybdenum diselenide film is deposited on the polishing surface of the side edge polishing optical fiber. The humidity sensor prepared through the combination of molybdenum diselenide and the optical fiber is simple in preparation and low in cost, and compared with a traditional humidity sensor, the humidity sensor has the advantages of high compatibility, sensitive response, good linearity, high repeatability and large humidity measurement range.

Description

technical field [0001] The invention relates to the technical field of optical fiber sensing, in particular to an optical fiber humidity sensor based on molybdenum diselenide and a preparation method thereof. Background technique [0002] Humidity is an important physical quantity. Aerospace, power generation and transformation, textile, food, medicine, storage, agriculture and other industries have very strict requirements on humidity. Effective real-time monitoring and control of humidity parameters is a prerequisite for normal production. The ideal humidity sensor can be used in a wide range of temperature and humidity: high measurement accuracy, long life, good stability, fast response, small hysteresis, high sensitivity, good linearity, small temperature coefficient, simple manufacturing process , small size, etc. At present, most humidity sensors are made by utilizing the influence of humidity on resistance or capacitance, so there are deficiencies in anti-electromagn...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N21/41G01N21/01
CPCG01N21/01G01N21/41
Inventor 关贺元余健辉卢惠辉欧阳腾辉林丽敏夏凯李东泉陈光磊唐洁媛张军陈哲罗云瀚
Owner JINAN UNIVERSITY
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