Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

An electronically controlled and tuned long-period photonic crystal fiber grating temperature sensor

A photonic crystal fiber, temperature sensor technology, used in thermometers, thermometers with physical/chemical changes, instruments, etc., can solve problems such as limiting applications, and achieve improved refractive index sensitivity, high temperature sensitivity and tunability, and enhanced coupling. Effect

Inactive Publication Date: 2020-07-24
NORTHEASTERN UNIV LIAONING
View PDF18 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The ultraviolet exposure method can only write the fiber core doped with germanium, which limits its application on the pure silica material substrate photonic crystal fiber

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • An electronically controlled and tuned long-period photonic crystal fiber grating temperature sensor
  • An electronically controlled and tuned long-period photonic crystal fiber grating temperature sensor
  • An electronically controlled and tuned long-period photonic crystal fiber grating temperature sensor

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0028] An electronically controlled and tuned long-period photonic crystal fiber grating temperature sensor is manufactured by stacking and drawing a photonic crystal fiber. The photonic crystal fiber base material FK51A has a relatively high refractive index. The end face of photonic crystal fiber is as figure 1 As shown, the cladding and core air hole diameter d is 1.05 μm, the hole spacing Λ is 4.61 μm, the fiber diameter D is 125 μm, and the refractive index of the substrate material n 1 It is 1.4759 (at 1550nm wavelength); the refractive index range of liquid crystal filled in the fiber core is 1.51~1.71. This parameter makes the photonic crystal fiber have an uncut single-mode characteristic, thereby avoiding the interference of other higher-order modes.

[0029] The periodic refractive index modulation of the photonic crystal fiber core filled with liquid crystal is carried out by applying voltage through the comb electrode to make an electronically controlled and tun...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
refractive indexaaaaaaaaaa
diameteraaaaaaaaaa
pore sizeaaaaaaaaaa
Login to View More

Abstract

The invention proposes an electronically controlled and tuned long-period photonic crystal fiber grating temperature sensor. Its photonic crystal fiber uses FK51A material, which has a higher refractive index than traditional silica, as its base. The air holes in the photonic crystal fiber core are filled with liquid crystal materials that are sensitive to temperature and electric fields. The long-period fiber grating effect is modulated by applying a voltage to the comb electrode to periodically change the refractive index of the liquid core. Its resonant wavelength can be determined by changing the comb electrode spacing (grating period). When the external temperature changes, the refractive index of the liquid crystal changes, so the temperature can be measured by monitoring the change in the resonant wavelength. The electronically controlled and tunable long-period photonic crystal fiber grating temperature sensor proposed by the present invention has the advantages of low cost, flexible structure, and tunable wavelength and bandwidth.

Description

technical field [0001] The invention belongs to the technical field of optical fiber sensors, and relates to an electronically controlled and tuned long-period photonic crystal fiber grating device, which can be used as a high-sensitivity temperature sensor. Background technique [0002] Long-period fiber grating sensors have the advantages of high sensitivity, compact structure, corrosion resistance, and anti-electromagnetic interference. They have long been a research hotspot in the field of optical fiber sensing. At present, long-period fiber grating sensors have been widely used to measure physical parameters such as refractive index, temperature, strain, and bending. However, traditional long-period fiber gratings can no longer meet the requirements of high-sensitivity measurement. Therefore, new sensors with high performance indicators need to be continuously explored. . [0003] Photonic crystal fiber is a special fiber with multi-layer air hole cladding, its flexibl...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): G01K11/32
CPCG01K11/3206
Inventor 赵勇王琦杜超
Owner NORTHEASTERN UNIV LIAONING
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com