CN101060377A - A wave coupling and splitting method in a dense wave division multiple transmission system - Google Patents
A wave coupling and splitting method in a dense wave division multiple transmission system Download PDFInfo
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- CN101060377A CN101060377A CNA2006100666624A CN200610066662A CN101060377A CN 101060377 A CN101060377 A CN 101060377A CN A2006100666624 A CNA2006100666624 A CN A2006100666624A CN 200610066662 A CN200610066662 A CN 200610066662A CN 101060377 A CN101060377 A CN 101060377A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/0227—Operation, administration, maintenance or provisioning [OAMP] of WDM networks, e.g. media access, routing or wavelength allocation
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Abstract
本发明公开了一种密集波分复用传输系统中组合合分波的方法，其包括以下步骤：A.采用滤波器将原处于黑波长位置的光信号分波滤出；B.剩余波长以预定分波长为界，从整体上分为小于该预定分波长和大于该预定波长的两部再进行组合合分波；C.针对所述两部分别采用分组滤波器将波长单个滤出。本发明方法消除了现有技术方案中造成的黑波长浪费问题；并且波长升级将更加灵活，初期配置波长分布相对均匀；并能够实现任意组波长合分波处理。
The invention discloses a method for combining and demultiplexing in a dense wavelength division multiplexing transmission system. The predetermined sub-wavelength is used as the boundary, and the whole is divided into two parts smaller than the predetermined sub-wavelength and larger than the predetermined wavelength, and then combined and demultiplexed; C. For the two parts, the wavelengths are individually filtered out by grouping filters. The method of the invention eliminates the problem of black wavelength waste caused by the prior art solution; moreover, the wavelength upgrade will be more flexible, and the distribution of the initially configured wavelengths is relatively uniform; and any group of wavelengths can be combined and demultiplexed.
Description
Technical field
The present invention relates to the method in a kind of optical transmission field, in particular a kind of optical transmission system closes method for dividing waves and realizes.
Background technology
In the prior art, traditional dense wave division multipurpose dwdm system closes method for dividing waves and generally adopts multilayer thin-film-filter and array waveguide grating to realize the partial wave that closes of multi-wavelength signals; Close for the dwdm system of 40 wavelength that partial wave is general just directly to adopt the multilayer dielectric film filtering of 40 ripple AWG modules or 40 ripples to realize.
The demand of equipment initial investment sensitivity and equipment progressively being upgraded along with operator, there is many transmission equipments producer to release and closes the partial wave solution, as shown in Figure 1: 40 or 80 wavelength signals will transmitting are divided into groups according to certain rule (as being the cycle according to 8 wavelength or 16 wavelength), the loss that has the part wavelength between the grouping forms so-called black wavelength (seeing wavelength shown in the arrow among Fig. 1).
The wavelength-division multiplex system that is prior art as shown in Figure 2 closes typical case's application that the partial wave engineering is realized, 32 of the actual uses of 40 wavelength of C-band scope, 32 wavelength that ripple will close in system are divided into four groups: 192.1THz-192.8THz (21-28 in the corresponding diagram); (193.1THz-193.8THz the 31-38 in the corresponding diagram); (194.3THz-195.0THz the 43-50 in the corresponding diagram); (195.3THz-196.0THz the 53-60 in the corresponding diagram).
See shown in Figure 3ly during concrete enforcement, describe (partial wave adopts reverse functions OMD module) among Fig. 3 to close ripple, each OMD module is finished above-mentioned 8 wavelength and is closed ripple, each module has the upgrading cause for gossip existing, equipment drops into the initial stage like this, only needs one of them module of configuration, and equipment investment cost is on the low side; And can really realize system's smooth upgrade.
But existing scheme has open defect, and at first the transmission system of 40 wavelength has 8 black wavelengths not utilize, and for today of communication resource anxiety, this has formed great waste, does not have really the effect of optical line amplifier to be given full play of; In addition, system's initial stage configuration wavelength concentrates on the long wave strong point, and for long system of distance, system is non-linear etc., and factor is difficult to reflection at the engineering initial stage, along with system progressively full configuration put the non-linear wavelength performance degradation that system will be disposed in early days of optical transmission system.
Therefore, prior art has defective, needs further improvement and develops.
Summary of the invention
The object of the present invention is to provide the method for closing partial wave in a kind of dense wave division multiplexing transmission system, deficiency at existing combination partial wave scheme, propose combination partial wave solution, can realize the partial wave that closes of 40 wavelength, solve original black wavelength waste problem that exists in the method for dividing waves of closing; The initial stage configuration Wavelength distribution of simultaneity factor is even relatively, and wavelength is selected also relatively flexibly during upgrading.
Technical scheme of the present invention comprises:
Close the method for partial wave in a kind of dense wave division multiplexing transmission system, it may further comprise the steps:
A, employing filter leach the former light signal partial wave that is in the black wavelength position;
To divide wavelength be the boundary with predetermined for B, residue wavelength, be divided on the whole less than this predetermined divide wavelength and make up again greater than two ones of this predetermined wavelength close partial wave;
C, do not adopt the packet filtering device to leach wavelength is single at described two parts.
Described method wherein, also comprises step:
D, inconsistent at different grouping filter Insertion Loss adopts the Insertion Loss regulation technology to solve.
Described method, wherein, the Insertion Loss regulation technology of described step D departs from certain size in advance when being included in design and coupling encapsulation.
Described method, wherein, the trailing edge and the rising edge of described filter are precipitous.
The method of closing partial wave in a kind of dense wave division multiplexing transmission system provided by the present invention compared with prior art, has been eliminated the black wavelength waste problem that causes in the prior art scheme; And the wavelength upgrading will be more flexible, and initial stage configuration Wavelength distribution is even relatively; And can realize organizing arbitrarily wavelength and close the partial wave processing.
Description of drawings
Fig. 1 is that a kind of wavelength-division multiplex system of prior art closes the wavelength-division schematic diagram;
Fig. 2 is that the typical case that the wavelength-division engineering construction is closed in the combination of prior art uses schematic diagram;
Fig. 3 is that 32 ripples of prior art close the wavelength-division schematic diagram;
Fig. 4 is that the wavelength-division multiplex system of the non-black wavelength of the inventive method closes the wavelength-division schematic diagram;
Fig. 5 is that partial wave embodiment schematic diagram is closed in the combination of the non-black wavelength of the inventive method;
Fig. 6 is that the wavelength-division multiplex system of the non-black wavelength of the inventive method closes wavelength-division exemplary embodiments schematic diagram.
Embodiment
Below in conjunction with accompanying drawing, will carry out comparatively detailed explanation to each preferred embodiment of the present invention, so that the technology of the present invention design and the more beneficial understanding of beneficial effect thereof.
The present invention proposes a kind ofly to close the partial wave solution as Fig. 4 light, and this method can solve the black wavelength problem, can not occur wavelength vacancy as shown in Figure 1 like this.
As shown in Figure 4, concrete grammar of the present invention is divided into following a few step set by step, hereinafter describes in the partial wave mode:
A, employing suitable filters will be in the light signal (λ of black wavelength position originally
a... λ
b, λ
i... λ
j, λ
k... λ
l, λ
m... λ
n) in advance partial wave leach, said here suitable filters is in general slightly high than conventional filter performance requirement, requires trailing edge and rising edge more precipitous, can not influence the transmission performance of closing on wavelength like this;
The employing of B, residue wavelength is divided into earlier red tape zone wavelength on the whole and blue zone zone long the combination again of wave-wave closed partial wave; As can be among the figure with λ
kBe the boundary, less than λ
kWavelength be the blue zone wavelength, be the red tape wavelength greater than the wavelength of λ k owing in advance black wavelength is leached, original black wavelength signal can not be affected, and can not form the next door wavelength yet and crosstalk.This processing mode is owing to be divided into the zone processing of red blue zone with wavelength, and the system wavelength upgrading will become more flexible.
C, at red tape zone wavelength and blue zone zone wavelength, adopt the packet filtering device to leach wavelength is single respectively, the employing method is identical with prior art and device with device.
D, different grouping filter Insertion Loss are inconsistent, can solve by adopting suitable Insertion Loss regulation technology, deliberately depart from certain size during as design and coupling encapsulation.
Close method for dividing waves at combinations thereof of the present invention, the present invention has announced a kind of implementation of concrete combination partial wave, and as shown in Figure 5, this scheme is divided into following a few step:
A, earlier a M waiting for transmission wavelength is divided into the N group, wherein i (i=1 ..., N) organize K arranged
iThere is L in individual wavelength between i group and the i+1 group
iIndividual wavelength channel, note K
N+1=∑ L
i, (i=1 ..., N), the wavelength volume is the N+1 group between all N groups like this, and this group wavelength is the black wavelength group, and black wavelength adds up to K
N+1Make up partial wave and handle, system passes through ODU earlier
N+1N+1 group wavelength is leached;
B, ODU
N+1Also finish the red blue zone wavelength packet filtering function of residue 1-N group wavelength simultaneously, and red tape and blue zone zone wavelength are segmented out once more, form thinner wavelength grouping ODU
1-ODU
N
C, thinner grouping wavelength signals are passed through ODU respectively
1-ODU
NThe grouping channel-splitting filter separates, and forms N * K
iIndividual independently wavelength.
D, at different channel wavelength Insertion Loss differences, can deliberately depart from certain size by design and when encapsulation coupling and solve.
Because reversibility of optical path, the technology of the present invention can be used for making up wave multiplexer fully.
The present invention has provided the combination of non-black wavelength C-band 40 wavelength and has closed the partial wave specific embodiment, and detailed process can be divided into several steps:
A1, elder generation divide into groups 40 wavelength, are radix with 8 wavelength, are divided into 5 groups:
First group: 192.1THz-192.8THz (21-28 in the corresponding diagram);
Second group: 193.1THz-193.8THz (31-38 in the corresponding diagram);
The 3rd group: 194.3THz-195.0THz (43-50 in the corresponding diagram);
The 4th group: 195.3THz-196.0THz (53-60 in the corresponding diagram);
The 5th group: remaining wavelength is another group (29 in the corresponding diagram, 30,39,40,41,42,51,52).
First to fourth group operation wavelength grouping also is the wavelength grouping solution of existing many producers, lacks 2 to 4 wavelength between group and the group, and industry will realize that generally 8 wavelength both sides respectively lack 1 wavelength filter and are called 8skip 2 filters; The filter that n corresponding wavelength both sides do not lack wavelength is called n skip 0 filter; It mainly is that price is relatively costly owing to 8skip 0 filter technological requirement height that existing scheme adopts 8skip 2 to solve;
A2, when making up partial wave and handling, first 4skip 0 filter that adopts is red tape wavelength and blue zone wavelength (signal less than the 193.9THz wavelength is called the red tape wavelength) with the first wavelength-division after filtration of 193.9THz-194.2THz wavelength, the red tape wavelength signals that leaches leaches wavelength and the 193.0THz wavelength of 192.9THz respectively through two filters, be divided into two groups of 192.1THz-192.8THz and 193.1THz-193.8THz on remaining 16 wavelength frequency domains; These 16 wavelength signals through a filter from physically being divided into 2 groups of wavelength signals; Same, the blue zone wavelength signals leaches 195.1THz and 195.2THz wavelength signals earlier, and remaining wavelength signals is divided into two groups through a filter: 194.3THz-195.0THz and 195.3THz-196.0THz;
A3,4 group of 8 wavelength signals of physically having separated adopt existing filtering technique just can be easy to realize the separation of 8 wavelength, shown in each ODU among the figure.
The Insertion Loss difference that may exist for different passages can have several different methods to solve, and deliberately departs from certain size in the time of can encapsulating by design and coupling and solves.Shown in the empty frame among Fig. 5, the filter function of realization can be integrated in a module, this module of system's initial configuration like this, and the wavelength of this resume module disperses to open at whole wave band; When system need upgrade, only need progressively dispose corresponding ODU module.
The inventive method range of application comprises:
Be used for C-band 80 ripple wdm systems; Also can be used for L-band 40 ripples/80 ripple dwdm systems.Be applied to the bidirectional WDM optical transmission system, corresponding bidirectional transmission system only needs Fig. 5 or equipment shown in Figure 6 are disposed a cover in the other direction.Combination partial wave solution provided by the invention can be applied in light top and bottom path node OADM equipment, the road up and down that can realize wavelength flexibly.
The combination partial wave solution of the inventive method compared with prior art, can solve the black wavelength waste problem that causes in the existing scheme; The wavelength upgrading will be more flexible, initial stage configuration empty frame equipment component as shown in Figure 6, and the Wavelength distribution of configuration is even relatively; And existing scheme system initial stage configuration wavelength concentrates on the shortwave strong point, for long system of distance, factors such as system is non-linear are difficult to reflection at the engineering initial stage, along with system progressively full configuration put the non-linear wavelength performance degradation that will make the early stage configuration of system of optical transmission system; The initial stage wavelength configuration of the present invention of comparing will be more reasonable.
Wavelength configuration is more flexible during method device upgrade provided by the invention.Existing scheme wavelength upgrading is carried out basically step by step, and method provided by the invention can realize organizing arbitrarily wavelength and close the partial wave processing.The present invention can close the partial wave solution by compatible existing 32 ripples, realizes the real smooth upgrade of existing equipment.
Should be understood that above-mentioned description at specific embodiment is comparatively detailed and concrete, can not therefore think the restriction to scope of patent protection of the present invention, scope of patent protection of the present invention should be as the criterion with claims.
Claims (4)
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100666624A CN101060377A (en) | 2006-04-17 | 2006-04-17 | A wave coupling and splitting method in a dense wave division multiple transmission system |
| PCT/CN2006/003766 WO2007118385A1 (en) | 2006-04-17 | 2006-12-30 | Method for multiplexing and demultiplexing optical wavelengths in the dwdm optical communication system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2006100666624A CN101060377A (en) | 2006-04-17 | 2006-04-17 | A wave coupling and splitting method in a dense wave division multiple transmission system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019205173A1 (en) * | 2018-04-28 | 2019-10-31 | 华为技术有限公司 | Wireless access network, construction method therefor, and communication device |
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|---|---|---|---|---|
| US6552834B2 (en) * | 2000-02-18 | 2003-04-22 | Corning Incorporated | Methods and apparatus for preventing deadbands in an optical communication system |
| CA2443409A1 (en) * | 2001-04-03 | 2002-10-17 | Nortel Networks Limited | High spectral efficiency, high performance optical mux and demux architecture |
| US20040252996A1 (en) * | 2003-06-10 | 2004-12-16 | Nortel Networks Limited | Flexible banded MUX/DEMUX architecture for WDM systems |
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- 2006-04-17 CN CNA2006100666624A patent/CN101060377A/en active Pending
- 2006-12-30 WO PCT/CN2006/003766 patent/WO2007118385A1/en active Application Filing
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019205173A1 (en) * | 2018-04-28 | 2019-10-31 | 华为技术有限公司 | Wireless access network, construction method therefor, and communication device |
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| WO2007118385A1 (en) | 2007-10-25 |
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