Method and device improving microwave signal time stretching linearity

A microwave signal and time-stretching technology, which is applied in optics, instruments, optical analog/digital converters, etc., can solve problems such as the lack of linearization methods for broadband optical time-stretching systems, improve linearity and dynamic range, and eliminate Third harmonic and third order intermodulation distortion, effects of increased sensitivity

Inactive Publication Date: 2016-08-10
成都卓力致远科技有限公司
View PDF4 Cites 10 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

For broadband TS-ADC systems, it should be considered to suppress the third-order intermodulation distortion while eliminatin

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
  • Method and device improving microwave signal time stretching linearity
  • Method and device improving microwave signal time stretching linearity
  • Method and device improving microwave signal time stretching linearity

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0035] Combine below figure 1 , take Matlab software simulation result as example to further illustrate the present invention.

[0036] The light source of this embodiment adopts a passive mode-locked fiber laser. The central wavelength of the output optical pulse is set to be 1555nm, and the pulse width is 210fs. After inputting the dispersion compensating fiber 2 of 1.3km, the mapping between wavelength and time is formed due to the effect of dispersion, and the output linear chirp Chirped light pulses. Next, two directional couplers 3 and 5 are connected, and the dual parallel modulator 4 is connected to the upper branch of the two directional couplers, and the two lower ports of the directional couplers 3 and 5 are directly connected. The power ratios of the upper and lower branches of the input and output of the dual parallel modulator 4 are both set to 88.9% and 11.1%, and the microwave signal of 5GHz is respectively loaded on the upper and lower MZM modulators accordin...

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 field of optoelectronic technology, and in particular relates to a method and a device for improving the linearity of microwave signal time stretching. The method of the invention utilizes the carrier suppression modulation of the double parallel modulator to realize the suppression of the DC component of the output signal, increases the sensitivity of the detector, effectively eliminates the even-order harmonic distortion, and improves the linearity of the system. By setting the optimal optical power coupling ratio and microwave signal power coupling ratio of the dual parallel modulators, combined with the modulation signal and reference signal interference and balanced detection, the third harmonic and third-order intermodulation distortion can be effectively suppressed, and the system can be significantly improved. The signal-to-noise-distortion ratio and effective number of bits are used to realize the linearization of microwave signal time-stretching analog-to-digital conversion systems.

Description

technical field [0001] The invention relates to the field of optoelectronic technology, in particular to a method and device for improving the time-stretching linearity of microwave signals. Background technique [0002] An analog-to-digital converter (ADC, Analog-to-digital converter) is an instrument that converts analog signals in nature into digital signals, so it plays a vital role in the process of building a digital system. However, due to the limitation of carrier mobility, traditional electronic analog-to-digital converters are difficult to achieve breakthroughs in broadband, high sampling rate and high effective number of bits. The inherent broadband, high speed, and stability of optical pulses make optical analog-to-digital conversion technology an effective way to break through electronic bottlenecks, making broadband and high-precision analog-to-digital conversion possible. Optical Time Stretch Analog-to-Digital Conversion (TS-ADC) technology is one of the wide...

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): G02F7/00
CPCG02F7/00
Inventor 张旨遥彭迪杨帆马阳雪高源
Owner 成都卓力致远科技有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap