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

Fiber SPR (surface plasmon resonance) sensing measuring optical circuit based on dual-frequency laser heterodyne interferometry

A dual-frequency laser and heterodyne interferometry technology, which is applied in measuring devices, phase-influenced characteristic measurements, and material analysis through optical means, can solve the problems of easy external interference of experimental results, large sensor system volume, and high cost of experimental materials. , to achieve the effect of good common optical path structure, simple optical path structure and strong anti-interference ability

Inactive Publication Date: 2016-07-20
BEIJING INSTITUTE OF TECHNOLOGYGY
View PDF2 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The preliminary work of this laboratory is mainly to research and design the Kretschmann prism coupling structure sensor, and to measure the physical properties of some gases and liquids. However, the cost of experimental materials is high, the volume of the sensor system is large, the experimental system is relatively complicated, and the experimental debugging is difficult. Large, the experimental results are susceptible to external interference

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 SPR (surface plasmon resonance) sensing measuring optical circuit based on dual-frequency laser heterodyne interferometry

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0012] Please refer to attached picture. The dual-frequency laser source (101) uses a transverse Zeeman dual-frequency laser with a frequency difference of 3 MHz to output a pair of linearly polarized light with orthogonal polarizations and a wavelength of 633 nm. The frequency difference between the frequency components parallel to and perpendicular to the paper surface is 5 MHz. The half mirror (102) is k9 optical glass coated with a semi-permeable film. The light beam is divided into two parts after passing through the half mirror (102), and each light beam includes the two polarization components. The transmitted light enters the polarization-maintaining fiber I (104) after being coupled by the focusing lens (103), is output from the polarization-maintaining fiber I (104) and is collimated by the focusing lens (105), and then passes through the fast axis direction to form a polarization component of p and s The first polarizer (106) at 45° forms a beat frequency signal, w...

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 the field of surface plasmon resonance (SPR) sensing measurement and laser interferometric measurement, in particular to a fiber SPR sensing measuring optical circuit based on dual-frequency laser heterodyne interferometry, comprising a dual-frequency laser source, a semi-transmitting semi-reflecting lens, a focusing lens, polarization maintaining fibers I and II, first and second polarizers, first and second detectors, and a phase measuring instrument. The laser source emits mutually orthogonal linearly polarized beams, each beam is split into two beams via the semi-transmitting semi-reflecting lens, and the transmitted beams pass through the focusing leans, the polarization maintaining fiber I (not treated), the focusing lens and the first polarizer to form a beat frequency signal that is received by the first detector and sent as a reference signal to the phase measuring instrument; the reflected beams pass through the focusing lens, the polarization maintaining fiber (the middle of which is made into SPR exciting structure), the focusing lens and the second polarizer and are received by the second detector, and the reflected beams are sent as a measurement signal to the phase measuring instrument. Through the phase measuring instrument, a phase difference Phi generated due to SPR can be acquired, and refractive index parameter of a medium to be measured can be measured according to a corresponding measuring formula.

Description

technical field [0001] The invention relates to the fields of surface plasmon resonance (SPR) sensing measurement and laser interferometry, and relates to a fiber optic surface plasmon resonance (SPR) coupling sensor and a laser heterodyne interference optical path system. In particular, it relates to an optical fiber SPR sensing measurement optical path based on dual-frequency laser heterodyne interference. Background technique [0002] The sensor based on surface plasmon resonance (SurfacePlasmonResonance, SPR) technology is an emerging sensing technology. In 1902, Wood discovered the surface plasmon resonance phenomenon in optical experiments, and SPR technology was further applied and developed in the 1980s. SPR technology has been widely used in chemical analysis, biomolecular interaction research, environmental pollution assessment, medical diagnosis and other fields due to its advantages of high precision, strong real-time performance, high degree of automation, and ...

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): G01N21/01G01N21/45
CPCG01N21/01G01N21/45G01N2021/0112G01N2021/458
Inventor 陈强华张孟策何永熹罗会甫李莉罗军
Owner BEIJING INSTITUTE OF TECHNOLOGYGY
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