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Optical transmission device, optical transmission system, and optical transmission method

A technology of optical transmission and equipment, applied in the field of optical transmission equipment, optical transmission system and optical transmission, can solve the problems of sub-carrier optical level deviation, deterioration of transmission characteristics, etc., and achieve the effect of improving transmission characteristics

Pending Publication Date: 2022-02-11
NEC CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, SCH transmission such as the prior art causes light level deviation between subcarriers and between groups including subcarriers, so there is a problem of deterioration of transmission characteristics

Method used

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  • Optical transmission device, optical transmission system, and optical transmission method
  • Optical transmission device, optical transmission system, and optical transmission method
  • Optical transmission device, optical transmission system, and optical transmission method

Examples

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no. 1 example

[0051] A first embodiment will be described below with reference to the drawings. In this embodiment, will describe Figure 7 The configuration in the figure 1 An example of the basic implementation in .

[0052] Figure 8 A schematic configuration of a node according to the present embodiment is shown. Similar to the basic example above, such as Figure 8 As shown, the node 100 according to this embodiment includes a plurality of transponders TPND (TPND_1 to TPND_3), a multiplexer AG, an optical cross-connect XF, and an optical amplifier CA, and also includes an optical channel monitor OCM, and a level correction unit before multiplexing 13 and the multiplexed horizontal correction unit 14. The pre-multiplex level correction unit 13 and the post-multiplex level correction unit 14 may be one control unit or may be included in an optical amplifier CA or the like.

[0053] The transponders TPND_1 to TPND_3 are optical transmission units that generate a plurality of subcarr...

no. 2 example

[0065] A second embodiment will be described below with reference to the drawings. In this embodiment, a specific example of an optical transmission system including nodes will be described.

[0066] Figure 11 A configuration example of the optical transmission system according to the present embodiment is shown. Such as Figure 11 As shown, the optical transmission system 1 according to the present embodiment includes a plurality of nodes (optical transmission equipment) 100 (100_1 to 100_3) and a network monitoring equipment (NMS: Network Management System) 200 . The optical transmission system 1 is not limited to three nodes 100_1 to 100_3 but may include any number of nodes.

[0067] The nodes 100_1 to 100_3 are connected via an optical transmission line OL such as an optical fiber, and can perform SCH transmission via the optical transmission line OL. Nodes 100_1 to 100_3 constitute a WDM (SCH) network 2 . For example, the WDM network 2 is a linear network, but it m...

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PUM

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Abstract

The invention relates to an optical transmission device, an optical transmission system, and an optical transmission method. An optical transmission device includes: a first optical signal transmission unit that outputs a first subcarrier optical signal; a second optical signal transmission unit that outputs a second subcarrier optical signal; a first optical power adjusting unit which adjusts the power of the first subcarrier optical signal; a second optical power adjusting unit that adjusts the power of the second subcarrier optical signal; the multiplexing unit that is used for multiplexing the first subcarrier optical signal and the second subcarrier optical signal into a first wavelength group optical signal and outputting the first wavelength group optical signal; and a third optical power adjustment unit that adjusts the power of the first wavelength group optical signal. The first optical power adjusting unit and the second optical power adjusting unit adjust the power difference between the first subcarrier optical signal and the second subcarrier optical signal; and the third optical power adjusting unit adjusts a power difference between the first wavelength group optical signal and a second wavelength group optical signal transmitted via the optical transmission line.

Description

[0001] This application is a divisional application of the PCT application number PCT / JP2017 / 009925, the international filing date is March 13, 2017, the Chinese application number is 201780015867.6, and the invention title is "optical transmission equipment and control method for optical transmission equipment" . technical field [0002] The present disclosure relates to an optical transmission device and a control method of the optical transmission device. More specifically, the present disclosure relates to a light transmission device that corrects a light level, and a control method of the light transmission device. Background technique [0003] The introduction of long-distance and large-capacity optical fiber communication systems to highways and subways is developing as demand for broadband multimedia communication services such as the Internet and video streaming increases. It is important for such an optical transmission system that uses optical fibers to enhance t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04J14/02
CPCH04J14/0202H04J14/0227H04J14/00H04J14/02216H04B10/294H04B10/293H04B10/07H04B10/03H04J14/0209H04J14/0298
Inventor 小熊健史松山友理惠
Owner NEC CORP