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A photonic crystal fiber optic humidity sensor based on gqds-pva composite and its preparation method

A technology of photonic crystal fiber and humidity sensor, which is applied in the direction of instruments, scientific instruments, color/spectral characteristic measurement, etc., and achieves the effects of low cost, simple preparation, and simple structure preparation

Active Publication Date: 2020-08-25
NORTHEASTERN UNIV LIAONING
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But it has no application in humidity sensor

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  • A photonic crystal fiber optic humidity sensor based on gqds-pva composite and its preparation method
  • A photonic crystal fiber optic humidity sensor based on gqds-pva composite and its preparation method
  • A photonic crystal fiber optic humidity sensor based on gqds-pva composite and its preparation method

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Embodiment Construction

[0022] The technical solutions of the present invention will be further described below through specific embodiments in conjunction with the accompanying drawings.

[0023] Step 1: Preparation of GQDs-PVA complex, the specific process is as follows: Weigh 161mg of PVA material and place it in a beaker with a capacity of 10mL, measure 9mL of GQDs solution with a concentration of 1mg / mL, and place it in a beaker containing 161mg of PVA Put the material in a beaker; then place the small beaker on a magnetic stirrer, adjust the stirring speed to 3000rad / min, fully stir at a temperature of 30°C, and place it for later use.

[0024] Step 2: Preparation of the photonic crystal fiber convex cone sensing structure. In this example, the length of the photonic crystal fiber is 1.8cm, and the diameter of the convex cone is 164.10μm. A photonic crystal fiber, and two sections of single-mode fiber of appropriate length, place a section of single-mode fiber and photonic crystal fiber in the ...

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Abstract

The invention belongs to the technical field of optical fiber humidity sensing and proposes a photonic crystal optical fiber humidity sensor based on GQDs-PVA composite and a preparation method. Its photonic crystal optical fiber convex cone humidity sensing structure consists of a section of photonic crystal optical fiber welded to both ends of a section of single-mode optical fiber. The outer surface of the photonic crystal optical fiber is coated with a GQDs-PVA composite film, and the thickness of the film is less than 4.45 μm. The mass ratio of GQDs‑PVA composite is PVA:GQDs=15~18. The invention proposes a photonic crystal optical fiber convex-cone humidity sensor based on GQDs-PVA composite, which has the advantages of simple preparation, low cost, high sensitivity, and can be used in harsh and narrow environments.

Description

Technical field: [0001] The invention belongs to the technical field of optical fiber humidity sensing, and relates to a photonic crystal optical fiber humidity sensor based on a GQDs-PVA compound and a preparation method. Background technique: [0002] At present, the commonly used humidity sensors are mainly electrochemical humidity sensors. However, with the increase of use time, electrochemical sensors are easily corroded. At the same time, electrochemical sensors are also susceptible to electromagnetic field interference, which affects the sensing accuracy and response time of the sensor. and other sensing performance. Optical fiber sensors can also be used in various harsh and narrow environments due to their advantages such as high sensitivity, light weight, no interference from electromagnetic fields, and simple preparation. The existing optical fiber humidity sensors mainly include D-type fiber-optic humidity sensors, Fabry Perot fiber-optic humidity sensors, and f...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/25G01N21/45G01N21/01
CPCG01N21/01G01N21/25G01N21/45G01N2021/0112G01N2021/458G01N2201/088
Inventor 赵勇仝锐杰
Owner NORTHEASTERN UNIV LIAONING
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