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

Phase-shifting fiber Bragg grating strain sensing system based on photoelectric oscillator

A fiber Bragg, photoelectric oscillator technology, applied in instruments, optical devices, measuring devices, etc., can solve the problem of reducing the measurement range, and achieve the effect of improving the demodulation signal-to-noise ratio, high resolution, and overcoming mutual constraints

Active Publication Date: 2013-10-09
INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
View PDF7 Cites 16 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, none of these solutions can avoid the mutual restriction between resolution and measurement range, that is, the improvement of resolution will lead to the reduction of measurement range, and vice versa

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
  • Phase-shifting fiber Bragg grating strain sensing system based on photoelectric oscillator
  • Phase-shifting fiber Bragg grating strain sensing system based on photoelectric oscillator
  • Phase-shifting fiber Bragg grating strain sensing system based on photoelectric oscillator

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] see figure 1 As shown, the present invention provides a kind of phase-shift fiber Bragg grating strain sensing system based on photoelectric oscillator, comprising:

[0027] A wavelength tunable laser 1, the wavelength tunable laser 1 has a single longitudinal mode output, and the wavelength tunable laser 1 is an external cavity laser, a sampling grating semiconductor laser or a fiber laser;

[0028] A polarization controller 2, the input end of the polarization controller 2 is connected to the output end of the wavelength tunable laser 1, and is used to adjust the polarization state of the output light of the wavelength tunable laser, and reduce the polarization-dependent loss in the transmission process of light;

[0029] A phase modulator 3, the optical input end of the phase modulator 3 is connected to the output end of the polarization controller 2, and is used for phase modulation of the input optical signal;

[0030] An optical circulator 4, the a end of the cir...

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

No PUM Login to View More

Abstract

A phase-shifting fiber Bragg grating strain sensing system based on a photoelectric oscillator comprises a wave-length tunable laser; an input end of a polarization controller is connected with an output end of the wave-length tunable laser; a light input end of a phase modulator is connected with an output end of the polarization controller; an end a of an optical circulator is connected with an output end of the phase modulator; one end of a phase fiber Bragg grating pi is connected with an end b of the optical circulator; an input end of a photoelectric detector is connected with an end c of the optical circulator; an input end of a microwave power beam splitter is connected with an output end of the photoelectric detector; an input end of a microwave power amplifier is connected with a first output end of the microwave power beam splitter; an output end of the microwave power amplifier is connected with a radio frequency input end of the phase modulator; an input end of a frequency spectrograph is connected with a second output end of the microwave power beam splitter.

Description

technical field [0001] The invention belongs to the field of optical fiber sensing, in particular to a phase shift optical fiber Bragg grating strain sensing system based on a photoelectric oscillator. Background technique [0002] Optical fiber sensing is an important field of sensing technology in the 21st century, and its development directly affects the progress of many industries. Fiber Bragg grating sensor is a wavelength modulation optical fiber sensor. Its mechanism is to obtain sensing information by modulating the fiber Bragg wavelength with external physical parameters. Because of its advantages that traditional sensors do not have, such as not being affected by electromagnetic interference, good electrical insulation, small size, light weight, large transmission capacity, and wide testing range, it is favored by people. [0003] The shift of fiber Bragg wavelength caused by external physical parameters can be measured by wavelength demodulation of optical filter...

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 Applications(China)
IPC IPC(8): G01B11/16
Inventor 李明邓晔祝宁华李伟王礼贤刘宇
Owner INST OF SEMICONDUCTORS - CHINESE ACAD OF SCI
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