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

A method for improving the signal-to-noise ratio of time-resolved terahertz spectroscopy using double phase-locking technology

A time-resolved, terahertz technology, which is applied in the field of signal-to-noise ratio improvement of time-resolved terahertz spectroscopy, can solve problems such as insufficient signal-to-noise ratio, obliteration of effective information noise, and inability to accurately obtain ultrafast dynamic information of material properties. Achieve the effect of avoiding influence and improving signal-to-noise ratio

Active Publication Date: 2022-07-08
SHANGHAI UNIV
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the current signal acquisition method used in the time-resolved terahertz system is generally only applied to a lock-in amplifier, and the signal-to-noise ratio is not high enough, resulting in the annihilation of effective information noise and the inability to accurately obtain material properties and ultrafast dynamics information.

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
  • A method for improving the signal-to-noise ratio of time-resolved terahertz spectroscopy using double phase-locking technology
  • A method for improving the signal-to-noise ratio of time-resolved terahertz spectroscopy using double phase-locking technology
  • A method for improving the signal-to-noise ratio of time-resolved terahertz spectroscopy using double phase-locking technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0018] Specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0019] like figure 1 As shown in the figure, a method for improving the signal-to-noise ratio of time-resolved terahertz spectrum by using dual phase-locking technology, the specific steps are as follows: first, it is necessary to build a A complete time-resolved terahertz spectroscopy system; secondly, the delay line needs to be scanned to complete the signal input of the detection part; then the signal of the detection part is input into two lock-in amplifiers, and the connection between the two choppers and the two lock-in amplifiers is completed at the same time. Then realize the signal synchronization of the chopper in the terahertz generation part to the chopper in the pump part, and then filter the background noise of the pump optical path from the lock-in amplifier input to the lock-in amplifier in the generation part, and Filter out th...

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 method for improving the signal-to-noise ratio of a time-resolved terahertz spectrum by using double phase locking technology. First, a time-resolved terahertz spectrum system is built; secondly, a delay line needs to be scanned to complete the signal input of the detection part; then the signal input of the detection part is required In the two lock-in amplifiers, the signal synchronization between the two choppers and the two lock-in amplifiers is completed at the same time; then the signal synchronization between the chopper in the terahertz generation part and the chopper in the pump part is realized, and then the The signal that filters out the background noise of the pump optical path is obtained from the lock-in amplifier in the input generation part of the lock-in amplifier, and makes a difference with the signal that filters out part of the background noise. After demodulation of the generated part of the lock-in amplifier, the signal difference ΔE / E is finally obtained, Scan the delay line to get the complete carrier dynamics process of the sample. The invention can greatly improve the signal-to-noise ratio of the system, and can not only be used in the time detection terahertz system, but also in the occasion of small signal and strong background noise.

Description

technical field [0001] The invention belongs to the technical field of signal-to-noise ratio improvement of time-resolved terahertz spectrum in ultrafast spectroscopy technology, and particularly relates to a method for improving the signal-to-noise ratio of time-resolved terahertz spectrum by using double phase locking technology. Background technique [0002] Terahertz spectroscopy technology is an effective means of spectral research in the terahertz band, which can study the properties of substances in various fields such as biology, environment, medicine, security inspection and communication. Time-resolved terahertz spectroscopy, as an effective non-contact detection method developed in recent years by combining terahertz time-domain spectroscopy and pump-detection technology, can directly observe the information reflected by the photo-induced changes of the sample signal. Intraband charge transfer process was investigated. Compared with terahertz time-domain spectros...

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): G01N21/3586G01J3/433
CPCG01N21/3586G01J3/433
Inventor 汤逸飞张逸竹
Owner SHANGHAI UNIV
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