Optical network fault detection device based on noise signals and detection method thereof

A technology for noise signal and fault detection, applied in optical network fault detection device and its detection field, can solve problems such as low resolution and complex structure, and achieve the effects of high spatial resolution, simplified device and convenient operation

Active Publication Date: 2012-09-19
TAIYUAN UNIV OF TECH
View PDF4 Cites 9 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0009] The present invention provides a noise signal-based optical network fault detection device and its detection method to solve

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
  • Optical network fault detection device based on noise signals and detection method thereof
  • Optical network fault detection device based on noise signals and detection method thereof
  • Optical network fault detection device based on noise signals and detection method thereof

Examples

Experimental program
Comparison scheme
Effect test

Example

[0031] first embodiment

[0032] Implementing the present invention is an optical network fault detection device based on noise signals, and the device is suitable for wavelength division multiplexing passive optical networks.

[0033] like figure 1 As mentioned above, a schematic structural diagram of a passive optical network is given, in which the optical line terminal OLT transmits a communication signal, and the signal is distributed by the communication wavelength division multiplexer in the optical distribution network unit ODN, and the distributed signal passes through the network. The target path enters the Optical Network Subscriber Unit ONU.

[0034] like figure 2 As mentioned above, a passive optical network detection device of the present invention is located on the OLT side of the optical line terminal, and includes a noise source and a signal processing unit.

[0035] like image 3 The noise source 1 of the present invention comes from the amplified sp...

Example

[0038] Second Embodiment

[0039] On the basis of the first embodiment, the second embodiment is Figure 4 As mentioned above, the signal processing unit is composed of a coupler I2, a reflective tunable filter 9, a photodetector I4, an A / D converter I6 and a signal processing device 8. Among them, one reference signal is filtered by the reflective tunable filter 9 and then enters the photodetector I4 through the coupler I2, and the positioning is realized by performing the autocorrelation operation on the collected signal, and the others are the same as the first embodiment. In this embodiment, the transmissive tunable filter 3 is replaced with a reflective tunable filter 9, which can make the structure of the signal processing unit simpler than that in the first embodiment.

Example

[0040] Third Embodiment

[0041] On the basis of the first embodiment, the third embodiment is Figure 5 As mentioned, the signal processing unit is composed of a coupler I2, a coupler II10, a transmissive tunable filter 3, a photodetector II5, an A / D converter II7 and a signal processing device 8. The reference signal and the returned detection signal are coupled into one signal through the coupler I2 and the coupler II10, and the collected signal is subjected to autocorrelation operation, and the others are the same as the first embodiment. In this embodiment, the structure is simplified by coupling the optical path without replacing the transmissive tunable filter 3 .

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

Provided are an optical network fault detection device based on noise signals and a detection method thereof. The device is characterized in that a noise source and a signal processing unit are arranged in a main optical fiber between an optical line terminal and an optical distribution network unit. The noise source includes spontaneous radiation noise amplified by an online optical amplifier or introduced noise signals and is located on the side of the optical line terminal. The method includes utilizing spontaneous radiation noise amplified by the optical amplifier in an optical fiber main line or introduced noise signals, conducting detection by coupling a wavelength division multiplexer into branches of the optical network, filtering optical signals of corresponding branches to be detected through a reflection type adjustable filter, conducting relative processing on returned detection signals and reference signals in the signal processing unit and achieving fault location through relative peak value of relative curves. The device and the method utilize noise wideband characteristics to achieve proper online location detection of the wavelength division multiplexing passive optical network, and are simple in structure, convenient to operate and accurate in optical network fault detection.

Description

technical field [0001] The invention relates to an optical network fault detection device and a detection method thereof, more specifically, an optical network fault detection device and a detection method using noise signals. Background technique [0002] Among various broadband access technologies, Passive Optical Network (PON) has become one of the hot technologies today due to its advantages of large capacity, long transmission distance, low cost, and full service support. PON is a point-to-multipoint network, mainly including three parts: optical line terminal OLT, optical distribution network ODN and optical network user unit ONU. Due to the multi-branch topology of PON, it brings great challenges to the detection of network faults. In order to ensure the stability of the optical fiber network, it is particularly important to quickly and accurately locate faults in the line. [0003] Existing optical network fault detection mainly uses a single-wavelength Optical ...

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): H04B10/08H04Q11/00H04B10/075
Inventor 王云才王安帮赵彤阚杰王娜
Owner TAIYUAN UNIV OF TECH
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