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

Multiple-mode interference and optical integration type accelerometer

An accelerometer, multi-mode interference technology, applied in the field of integrated optics, can solve the problems of difficult integration of optical devices, and achieve the effect of easy integration, expansion of application fields, and high sensitivity

Active Publication Date: 2015-04-01
SOUTHEAST UNIV
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Purpose of the invention: In order to solve the deficiencies of the prior art, the present invention provides a multi-mode interference optical integrated accelerometer, through the MMI sensor attached to the cantilever beam, to obtain acceleration data, and finally through the light field of the optical device to obtain data through the spectrometer , which solves the problem that optical devices are not easy to integrate 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
  • Multiple-mode interference and optical integration type accelerometer
  • Multiple-mode interference and optical integration type accelerometer
  • Multiple-mode interference and optical integration type accelerometer

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] The present invention will be further explained below in conjunction with the accompanying drawings.

[0019] A multi-mode interference optical integrated accelerometer is characterized in that it includes an ASE broadband light source 1, a circulator 2, an optical fiber link 3, a module to be measured 5, a sensor module and a spectrometer 8;

[0020] The output of the ASE broadband light source 1 is connected to the circulator 2, and the output of the circulator 2 is connected to the optical fiber link 3 and the spectrometer 8; the optical fiber link 3 is connected to the sensor module;

[0021] The sensing device module includes a substrate 7 and an MMI sensing element 6 attached to the cantilever arm 4, one end of the cantilever arm 4 is fixed on the substrate 7, and the other end is connected to the module to be tested 5; the MMI sensing element 6 is composed of A front single-mode fiber 9, a multimode fiber 10 and a rear single-mode fiber 11 are formed; the multimo...

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 discloses a multiple-mode interference and optical integration type accelerometer which comprises an ASE (amplified spontaneous emission) broadband light source, a circulator, an optical fiber link, a to-be-measured module, a sensor module and a spectrograph, wherein an optical signal sent from the ASE broadband light source enters the optical fiber link through the circulator and enters the sensor module through the optical fiber link; in the sensor module, an input optical field enters multimode fiber through a front single-mode fiber; and when a cantilever arm deforms, the wave length of the optical signal drifts, and the drifted optical signal is reflected by an aluminum film attached to the tail end of a rear single-mode fiber, then enters the optical fiber link again and is output to the spectrograph under the action of the circulator for calculation. The device has a simple structure and high sensitivity; as for standard optical fiber, Pe is equal to 0.22, and nu is equal to 0.17; the axial sensitivity coefficient of an FBG (fiber bragg grating) sensor made of the material is 0.78 which is the difference of 1 and Pe; the sensitivity coefficient of the accelerometer is 1.56 and is 2 times of that of the FBG sensor in the aspect of numerical value; and integration is facilitated, and the application field of the device is expanded.

Description

technical field [0001] The invention relates to the technical field of integrated optics, in particular to a multi-mode interference optical integrated accelerometer. Background technique [0002] As an important measuring instrument, the accelerometer is widely used in current scientific research, production and manufacturing. Compared with traditional accelerometers, optical accelerometers have the advantages of light weight, easy laying, and no electromagnetic interference. Optical accelerometer is the basic component of optical fiber sensing, optical measurement and remote monitoring system, which is used to realize functions such as acceleration measurement, vibration sensing and remote monitoring. [0003] Optical accelerometers mainly include interferometer type, Bragg grating type, resonant cavity type, multi-mode interference type and so on. Interferometer-type optical accelerometers have a complex structure, Bragg-grating-type optical accelerometers are easily af...

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
IPC IPC(8): G01P15/00
Inventor 肖金标官绪冬
Owner SOUTHEAST UNIV