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Optical signal level adjustment system, information analysis/control signal generation apparatus in the same system, and information analysis/control signal generation method

A technology for level adjustment and signal control, applied in optical multiplexing systems, transmission systems, wavelength division multiplexing systems, etc. Effects of Deterioration of Transmission Characteristics

Active Publication Date: 2012-02-01
NEC CORP
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  • Abstract
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Problems solved by technology

However, these methods require complex circuit configurations and increase cost

Method used

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  • Optical signal level adjustment system, information analysis/control signal generation apparatus in the same system, and information analysis/control signal generation method
  • Optical signal level adjustment system, information analysis/control signal generation apparatus in the same system, and information analysis/control signal generation method
  • Optical signal level adjustment system, information analysis/control signal generation apparatus in the same system, and information analysis/control signal generation method

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Embodiment Construction

[0027] Exemplary embodiments for practicing the present invention are described in detail below with reference to the accompanying drawings.

[0028] In the submarine cable system using OADM-BU, (1) a virtual light is set in the signal strip to relieve the main signal when the cable is disconnected, and (2) the virtual light is set in the The output is adjusted so that the degradation of the transfer characteristics of the main signal is suppressed.

[0029] figure 1 The submarine optical cable system illustrated in includes terminal station equipment 101, 102, 103, 111 installed in a land station (landing station), and a transmission path 108, optical repeaters 113, 115, 117, 107, and 119, and located in BU (Branch Units) 104 and 105 on the seabed. Each of the land stations (station A, station B) 101 and 102 that directly transmit / receive optical signals without branching them is called a "trunk station", and the land stations (station C, station C) that transmit / receive br...

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Abstract

The present invention enables to prevent transmission characteristics from deteriorating due to the nonlinear effect in the transmission path caused by an increase in the channel power when a cable disconnection occurs. An optical signal level adjustment method comprises the steps of: obtaining, based on one or more optical signal disconnections which are detected per wavelength block and each of which is detected by a signal disconnection detection section included in each of terminal station devices, a location at which the optical signal disconnection has occurred, a combination of a terminal station device and a wavelength block, and a dummy light adjustment amount, said combination being required to be subjected to adjustment of transmission dummy light, said combination and said dummy light adjustment amount corresponding to the location; and transmitting, to the terminal station device which is required to be subjected to adjustment of the transmission dummy light, a control signal for adjusting the intensity of the dummy light in the obtained wavelength block by the dummy light adjustment amount.

Description

technical field [0001] The present invention relates to an optical signal level adjustment system, an information analysis / control signal generation device in the system, and an information analysis / control signal generation method, and more particularly, relates to a system applicable to submarine optical cable systems and land optical communication systems An optical signal level adjustment system, an information analysis / control signal generation device in the system, and an information analysis / control signal generation method. Background technique [0002] Generally, in order to realize channel power management when a cable is disconnected, an optical repeater output is adjusted or a switching circuit is installed in a BU (Branch Unit). However, these methods require complicated circuit configurations and increase costs. [0003] Patent Document 1 discloses a technique in which dummy light (ASE light) is set in a wavelength band unassigned to a wavelength channel, and ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B10/08H04J14/00H04J14/02H04B10/07H04B10/03H04B10/079H04B10/29H04B10/296
CPCH04J14/0221H04B10/27H04J14/0213H04B10/0791
Inventor 井上贵则
Owner NEC CORP
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