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Optical network with optical channel monitoring apparatus using polarization modulation and its method

A polarization modulation and monitoring device technology, applied in the field of optical networks, can solve problems such as data signal quality degradation

Inactive Publication Date: 2005-02-09
ERICSSON-LG
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This makes it easy to detect single-tone signals, but at the same time degrades the data signal significantly

Method used

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  • Optical network with optical channel monitoring apparatus using polarization modulation and its method
  • Optical network with optical channel monitoring apparatus using polarization modulation and its method
  • Optical network with optical channel monitoring apparatus using polarization modulation and its method

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Embodiment Construction

[0035] Next, the device and method for monitoring channel information using polarization modulation technology according to a preferred embodiment of the present invention will be described with reference to the accompanying drawings.

[0036] Such as Figure 6 As shown, the channel information monitoring device for a wavelength division multiplexing (WDM) network according to the present invention includes a plurality of polarization modulation units 20-1 to 20- N. A polarization detector 80 is connected between the tap coupler 40 and the photodetector 50 in order to detect the optical signals polarized by the plurality of polarization modulation units 20 - 1 to 20 -N.

[0037] Each polarization modulation unit 20-1~20-N includes a laser 21 for emitting light waves corresponding to a certain data rate (preferably 2.5Gb / s), and a laser 21 for changing the laser wave according to a certain electrical signal. The polarization modulator 22 for the polarization of the emitted li...

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PUM

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Abstract

PURPOSE: An apparatus and method for detecting an optical signal channel information using a polarization modulation are provided for accurately detecting a channel information on a transmission line and enhancing a data reliability when detecting a channel information of an optical communication network of a single or multiple channel wavelength division method. CONSTITUTION: A polarization modulation optical transmitter(1000 polarizes and modulates a data which will be transmitted based on each channel and multiplexes the same and transmits to an opponent optical transmission system(600). A tap coupler(200) extracts a signal in a range in which a signal transfer is not affected among the optical signals outputted from the polarization modulation optical transmitter(100). A polarization light detector(300) receives an optical signal outputted from the tap coupler(200) and detects a polarized signal.

Description

technical field [0001] The present invention generally relates to an optical network, and in particular to a wavelength division multiplexing (WDM) network. Background technique [0002] Modern optical communication networks are gradually evolving into wavelength division multiplexing (WDM) networks, through which optical signals with different wavelengths (commonly called channels) can be used to transmit large amounts of information in a single optical fiber line or voice data. [0003] The implementation technologies of such networks include broadband optical amplifiers, optical multiplexers, optical demultiplexers, optical switches, etc. Specifically, the optical amplifier is the most important component in the WDM network. However, in order for the WDM network to work normally in an optical manner, it is fundamental to know the status of each optical channel in the WDM network (for example, optical power, optical signal-to-noise ratio, etc.). [0004] figure 1 and ...

Claims

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Application Information

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IPC IPC(8): H04B10/07H04B10/2581H04B10/532
CPCH04B10/07957H04B10/532H04B2210/078
Inventor 罗其云
Owner ERICSSON-LG
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