Unlock instant, AI-driven research and patent intelligence for your innovation.

Fiber bragg grating array sensing system in cavity

A fiber Bragg and grating array technology, applied in the field of sensing systems, can solve problems such as poor stability of the sensing system, and achieve the effects of simple and feasible system structure, good temperature sensing accuracy and stress sensing accuracy, and high signal-to-noise ratio.

Inactive Publication Date: 2014-12-17
HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The technical problem solved by the present invention is to construct a linear intracavity fiber Bragg grating array sensing system to overcome the technical problem of poor stability of the sensing system in the prior art

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
  • Fiber bragg grating array sensing system in cavity
  • Fiber bragg grating array sensing system in cavity
  • Fiber bragg grating array sensing system in cavity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] The technical solution of the present invention will be further described below in conjunction with specific embodiments.

[0019] Such as figure 1 As shown, the specific implementation of the present invention is to construct an intracavity fiber Bragg grating array sensing system, including: a fiber Bragg grating array 15 composed of a plurality of fiber Bragg gratings connected in series, a wavelength division multiplexer 5, and a pump Source 6, Et-doped fiber 7, polarization controller 8, coupler 9, single-mode fiber 10, quarter wave plate 11, wavelength demodulation device 12, computer 13, said pump source 6 is connected to said wavelength division complex Port a of the device 5, the fiber Bragg grating array 15 is connected to the port b of the wavelength division multiplexer 5, and the port c of the wavelength division multiplexer 5 is connected to one end of the baited fiber 7, so The other end of the bait-doped fiber 7 is connected to one end of the polarization c...

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

The invention relates to a fiber bragg grating array sensing system in a cavity. Four FBGs are introduced in a laser resonance cavity; a laser is adopted as a sensing system. Compared with higher signal-to-noise ratio in the traditional scheme, the signal-to-noise ratio higher than that in the traditional scheme is obtained, and the temperature sensing accuracy and the stress sensing accuracy are better. Besides, the system is simple and feasible; the sensing scheme can sense and measure a plurality of gratings simultaneously, and is beneficial to repeated use of the fiber gratings.

Description

Technical field [0001] The invention relates to a sensing system, in particular to a fiber Bragg grating array sensing system in a linear cavity. Background technique [0002] The fiber grating sensor is not electromagnetic interference, the transmission signal is safe, and non-contact measurement can be realized. It can be made into a variety of optical fiber type and sensor type sensors. It has high sensitivity, high precision, high speed and high density. , Adapt to various harsh environments and features such as non-contact, non-destructive and easy to use. [0003] In the research of traditional FBG sensing systems, a broad-spectrum light source or a wavelength-tunable fiber laser is usually used to provide optical signals for the entire system. However, the broad-spectrum light source has many defects, such as low output power. Due to the low output power, the FBG has low signal-to-noise ratio during long-distance sensing, and the detectable power is not high, resulting in h...

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): G01D5/26
Inventor 孙云旭丛山梁影潘利峰姚勇
Owner HARBIN INST OF TECH SHENZHEN GRADUATE SCHOOL