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

Multi-subcarrier detection signal generation system for single sideband modulation and carrier reservation

A single-sideband modulation and multi-subcarrier technology, applied in electromagnetic wave transmission systems, transmission systems, electrical components, etc., can solve the problems of sideband signal superposition and spectral detection that cannot take into account the quality of sideband signals and hardware costs, etc., to achieve fast The effect of detecting and avoiding the problem of sideband signal superposition

Pending Publication Date: 2022-06-24
SUN YAT SEN UNIV
View PDF0 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem that the current method of modulating the electrical frequency domain to the optical domain for spectral detection cannot take into account both the quality of the sideband signal and the cost of hardware, the present invention proposes a multi-subcarrier detection signal generation system with single sideband modulation and reserved carrier to realize Fast detection of a large number of resonant spectra, avoiding the sideband signal superposition problem caused by the intensity modulator

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
  • Multi-subcarrier detection signal generation system for single sideband modulation and carrier reservation
  • Multi-subcarrier detection signal generation system for single sideband modulation and carrier reservation
  • Multi-subcarrier detection signal generation system for single sideband modulation and carrier reservation

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] like figure 1 As shown, this embodiment proposes a multi-subcarrier detection signal generation system with single-sideband modulation and reserved carrier, including: a single-frequency optical signal generator, a microwave signal generator, a π / 2 phase shifter, and an IQ optical modulator , One-to-two optical coupler, optical microcavity device to be detected, spectrometer, bias voltage control source, photodetector, the connection relationship of each component is as follows figure 1 shown.

[0047] On the whole, the single-frequency optical signal generator uses a narrow linewidth continuous laser light source, and the narrow linewidth continuous laser light source emits a frequency of f 0 The continuous single-frequency optical signal is input to the IQ optical modulator through the optical path; the microwave signal generator emits n different frequencies f i The sub-carrier radio frequency driving signals of the device are divided into two sub-carrier radio fre...

Embodiment 2

[0055] In this embodiment, the system proposed in Embodiment 1 is used to simulate the left band signal in the double sideband. After the simulation, the signal spectrum comparison diagram obtained after the photodetector beat frequency is shown Image 6 , because the comparison of signals is involved, the drawings are not split here. Image 6 In, (a), (c), (e) and (g) represent the spectral information input to the spectrometer after the IQ optical modulator performs SSB modulation, the abscissa represents the frequency, and the ordinate represents the power response, where ( The "arrows" in a), (c), (e), and (g) indicate the suppressed sidebands, which are suppressed and decreased in order from (a) to (g), (b), (d), (f) and (h) corresponding to the photodetector pairs (a), (c), (e) and (g) of the spectral information of the beat frequency signal map, through Image 6 It can be obtained from the simulation data of , that with the suppression of its left band, the change of t...

Embodiment 3

[0058] This embodiment applies the multi-subcarrier sounding signal generation system with single-sideband modulation and reserved carriers proposed in Embodiment 1, and proposes a method for generating a multi-subcarrier sounding signal. For a flowchart of the method, see Figure 7 , including the following steps:

[0059] S1. Use a single-frequency optical signal generator to send out a frequency of f 0 The continuous single-frequency optical signal is input into the IQ optical modulator;

[0060] S2. Use the microwave signal generator to send out n sub-carrier RF driving signals of different frequencies fi, which are divided into two sub-carrier RF driving signals with a phase difference of π / 2 by a π / 2 phase shifter, and then input to the IQ optical modulator to drive The IQ optical modulator modulates the continuous single-frequency optical signal;

[0061] S3. Use a one-to-two optical coupler to input the modulated single-frequency optical signal into the spectrometer,...

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 provides a multi-subcarrier detection signal generation system for single sideband modulation and carrier reservation, and relates to the technical field of optical sensing and optical signals, a continuous single-frequency optical signal is emitted through a single-frequency optical signal generator, and the continuous single-frequency optical signal is input into an IQ optical modulator; a microwave signal generator is utilized to generate subcarrier radio frequency driving signals with different frequencies, the subcarrier radio frequency driving signals are divided into two paths to be input into an IQ optical modulator, the IQ optical modulator is driven to modulate continuous single-frequency optical signals, the bias voltage of the IQ optical modulator is preset, the bias voltage state of the IQ optical modulator is adjusted through a bias voltage control source, single-side-band modulation is completed, and multi-subcarrier bias voltage modulation of carriers is reserved. And then inputting the optical microcavity device to be detected for spectrum detection, outputting a detection signal, and inputting the detection signal into a photoelectric detector for beat frequency. Compared with double-sideband modulation, the scheme avoids the problem of sideband signal superposition caused by utilization of an intensity modulator, is more suitable for spectrum detection application occasions with more and dense resonance peaks, such as a microcavity, and realizes rapid detection of a large number of resonance spectrums.

Description

technical field [0001] The present invention relates to the technical field of optical sensing and optical signals, and more particularly, to a multi-subcarrier detection signal generation system with single sideband modulation and reserved carrier. Background technique [0002] With the extensive research on the whispering gallery mode optical microcavity, the mechanism of the interaction between the light field and matter of the whispering gallery mode optical microcavity has been deeply explored, and the whispering gallery mode optical microcavity has become an ultra-sensitive optical sensor. Excellent platform, with important application value in high-precision sensing and detection. [0003] At present, the spectral detection of optical microcavity is mainly completed by the spectral scanning method, and the equipment on which the spectral scanning method is implemented includes a broadband light source, a spectrometer, and a swept-frequency laser. Generally speaking, ...

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): H04B10/516H04B10/564
CPCH04B10/5165H04B10/564Y02D30/70
Inventor 李朝晖潘竞顺冯耀明李强
Owner SUN YAT SEN UNIV
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com