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

Distributed polarization crosstalk rapid measurement device based on optical frequency domain interference

A technology of polarization crosstalk and measurement device, which is applied in measurement device, measurement of polarization of light, optical radiation measurement, etc., to achieve the effect of promoting and popularizing, avoiding signal aliasing, and expanding range

Pending Publication Date: 2021-12-17
GUANGDONG UNIV OF TECH
View PDF15 Cites 4 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0011] The purpose of the present invention is to provide a distributed polarization crosstalk fast measurement device based on optical frequency domain frequency shift interference that substantially improves the test speed and dynamic range of polarization crosstalk and overcomes the problems of low-frequency flicker noise and signal aliasing

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
  • Distributed polarization crosstalk rapid measurement device based on optical frequency domain interference
  • Distributed polarization crosstalk rapid measurement device based on optical frequency domain interference
  • Distributed polarization crosstalk rapid measurement device based on optical frequency domain interference

Examples

Experimental program
Comparison scheme
Effect test

specific Embodiment approach 1

[0052] Specific Embodiment 1, a device for fast measurement of Y-waveguide polarization crosstalk in the optical frequency domain, as attached image 3 Shown:

[0053] It consists of four parts: tunable laser source module 1, device under test module 2, main interferometer module 3, auxiliary interferometer module 4 and signal acquisition and analysis module 5, among which:

[0054] 1) The tunable laser source module 1 outputs linear frequency modulated continuous light 602, which is injected into the first coupler 601 from the first coupler input end 601a and divided into two beams of light;

[0055] 2) The light beam output by the first output end 601c of the first coupler is injected into the DUT module 2;

[0056] 3) The light beam output from the DUT module 2 is injected into the main interferometer module 3, and injected into the second coupler 302 by the second coupler input port 301 thereof to be divided into two beams of light, and one beam is injected into the refer...

specific Embodiment approach 2

[0073] Specific embodiment 2, a device for fast measurement of optical fiber ring polarization crosstalk in the optical frequency domain, as attached Figure 4 shown.

[0074] The selection and performance parameters of the main optoelectronic devices of the inventive device are as follows:

[0075] 1) Tunable laser source module 1 is a narrow-linewidth tunable laser capable of continuous wavelength scanning. The wavelength tuning range is 1510nm to 1620nm. The high coherence mode is turned on. The output power of the light source is 6.4mW, and the wavelength scanning rate is 80nm / s. The wavelength scanning time is 1.375s, such as using Santec's TSL-550 laser;

[0076] 2) The photosensitive materials of the first balanced detector 308 and the second balanced detector 406 are both InGaAs, the common mode rejection ratio is 25dB, the optical detection range is 900-1700nm, the maximum detection bandwidth is 80MHz, and the saturated differential detection power is 55uW. The tran...

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

PropertyMeasurementUnit
Diameteraaaaaaaaaa
Lengthaaaaaaaaaa
Login to View More

Abstract

The invention belongs to the technical field of optical fiber measurement, and particularly relates to an optical fiber distributed polarization crosstalk rapid measurement device based on optical frequency domain interference, which comprises a tunable laser source module (1), a to-be-measured device module (2), an auxiliary interferometer module (3) and a signal acquisition and analysis module (4). The device is characterized in that a high-coherence tunable laser is used for carrying out rapid wavelength scanning on an optical signal, linear frequency modulation continuous light (501) is output, the linear frequency modulation continuous light (501) sequentially passes through a polarizer (202), a to-be-measured device (206) and a polarization analyzer (210), a beat frequency signal generated by interference of coupling light (704) and transmission light (701) is obtained on an optical frequency domain, then an optical path difference and a normalized interference signal amplitude are obtained through calculation, and polarization crosstalk position and intensity are respectively determined. The tunable laser is combined to get rid of dependence on an optical path scanning delayer in polarization crosstalk measurement, the speed and the dynamic range of polarization crosstalk measurement are greatly improved, and the device is compact in structure, stable, reliable and easy to implement.

Description

technical field [0001] The design of the invention belongs to the technical field of optical fiber measurement, and in particular relates to a distributed polarization crosstalk fast measurement device based on optical frequency domain frequency shift interference. Background technique [0002] Optical coherent domain polarization measurement technology (OCDP) based on the principle of white light interference is an important technology for the detection of distributed optical polarization crosstalk characteristics. It is mainly dedicated to the high-precision analysis of the position and intensity of polarization crosstalk. Crosstalk distribution can obtain information such as stress and temperature of the external environment. While testing and evaluating the performance of polarization optical devices, it can also provide information for the production inspection of polarization-maintaining optical fibers, the winding process of optical fiber rings, and the accuracy of pol...

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): G01J4/00
CPCG01J4/00
Inventor 喻张俊庄芹芹朱庭毅杨军徐鹏柏温坤华王云才秦玉文
Owner GUANGDONG UNIV OF TECH
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