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

A Fourier Domain Mode-locked Photoelectric Oscillator Based on Electronically Controlled Frequency Sweep and Its Implementation Method

A Fourier domain mode locking, photoelectric oscillator technology, applied in electromagnetic transmitters, re-radiation of electromagnetic waves, instruments, etc., can solve the effect of echo signal de-slope demodulation and pulse compression performance, and affect the frequency of chirp signals Stability, poor output signal linearity, etc., to achieve the effect of flexible and accurate tunability, good output signal frequency stability, good linearity

Inactive Publication Date: 2021-04-02
UNIV OF ELECTRONICS SCI & TECH OF CHINA
View PDF10 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In this structure, the wavelength difference between the frequency-sweeping laser and the pumping laser determines the frequency of the output signal of the optoelectronic oscillator, so the use of dual light sources will affect the frequency stability of the chirp signal
[0004] In summary, the reported Fourier domain mode-locked optoelectronic oscillator schemes have the following problems: first, the linearity of the output signal is poor due to the large frequency drift in the frequency sweep range; second , the use of dual light sources leads to poor stability of the output signal
The above problems will have a serious impact on the radar system receiving end echo signal deskewing demodulation and pulse compression performance

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 Fourier Domain Mode-locked Photoelectric Oscillator Based on Electronically Controlled Frequency Sweep and Its Implementation Method
  • A Fourier Domain Mode-locked Photoelectric Oscillator Based on Electronically Controlled Frequency Sweep and Its Implementation Method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] Embodiments of the present invention are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present invention.

[0023] combine figure 2 , the system principle in the present invention is further described as follows:

[0024] Such as figure 1 As shown, the laser output frequency is After the DC optical signal is split by the optical coupler, one of them is used as a signal optical branch, and the other is used as a pump optical branch. For the pump optical branch, the DC optical input to the microwave signal source Drive, working in the ...

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 belongs to the technical field of optoelectronics, and in particular relates to an electronically controlled frequency-sweeping-based Fourier domain mode-locked optoelectronic oscillator and an implementation method. The invention adopts a microwave photon filter based on stimulated Brillouin scattering, uses electro-optical frequency shifting technology to realize fast frequency sweeping of the microwave photon filter, thereby constructing a Fourier domain mode-locked photoelectric oscillator, and by setting the microwave photon filter The frequency sweep period, sweep frequency range and center frequency realize the chirp signal generation with large instantaneous bandwidth, low phase noise, high frequency stability and high linearity.

Description

technical field [0001] The invention relates to the field of optoelectronic technology, in particular to an electronically controlled frequency-sweeping-based Fourier domain mode-locked optoelectronic oscillator and an implementation method. Background technique [0002] A chirp signal is a signal whose frequency increases or decreases linearly with time, and is widely used in modern radar systems. Traditional electronics-based linear frequency modulation signal generation usually uses direct digital frequency synthesis technology, which is limited by the performance of electronic devices, its instantaneous bandwidth and time-bandwidth product and other parameters are greatly limited, and the sweep bandwidth across octaves is difficult. However, it cannot meet the requirements of modern imaging radar systems for performance indicators such as range resolution and operating range. In recent years, photonics-based chirp signal generation technology has attracted extensive att...

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): H04B10/50H04B10/516H04B10/548H04B10/54G01S7/4911G01S17/89
CPCG01S7/4911G01S17/89H04B10/505H04B10/5161H04B10/5165H04B10/54H04B10/548
Inventor 曾珍张旨遥章令杰张尚剑张雅丽孙豹刘永
Owner UNIV OF ELECTRONICS SCI & TECH OF CHINA
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