CN101131451A - Non-black wavelength grouping wave-filtration device and method thereof - Google Patents
Non-black wavelength grouping wave-filtration device and method thereof Download PDFInfo
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- CN101131451A CN101131451A CNA2006101115262A CN200610111526A CN101131451A CN 101131451 A CN101131451 A CN 101131451A CN A2006101115262 A CNA2006101115262 A CN A2006101115262A CN 200610111526 A CN200610111526 A CN 200610111526A CN 101131451 A CN101131451 A CN 101131451A
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- 230000003287 optical effect Effects 0.000 claims abstract description 28
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J14/00—Optical multiplex systems
- H04J14/02—Wavelength-division multiplex systems
- H04J14/03—WDM arrangements
- H04J14/0307—Multiplexers; Demultiplexers
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Abstract
A grouping filtering device without black wavelength includes the band-pass filter module, many m-wave wave separator and an optical splitter. The main light is divided into two light signals, which are transformed into the odd group and even group filter; the every filter filters the optical signal and outputs the n/m optical signal to the m-wave separator of same number. The band width of optical signal outputted from the any two filter in same group are at least intervals with m wave lengths, in which, n is the whole number of optical wave, m is the covering wavelength of every number band-pass filter module band width, when the n/m is not the integer, it accepts the integer; the optical signal from filter is divided into constant non-black wavelength signal by the m-wave separator. The invention can avoid generating the black wave length but filter the WDM system whole wavelength at the output end.
Description
Technical field
The present invention relates to a kind of optical filtering apparatus and filtering method thereof, be particularly related to light packet filtering device and packet filtering method thereof in a kind of WDM (Wave Division Multiplexing, wavelength-division multiplex) system transmissions equipment wavelength division multiplexer that is applied to optical communication field.
Background technology
In the optical communication field, wavelength-division multiplex technique with its exclusive technical advantage, fully satisfies the demand of present network broadband business development as effective, the most most economical means of optical fiber dilatation, has also established good foundation stone for leading to following full Optical Transmission Network OTN simultaneously.
Wdm system comprises modules such as light transmission/receiver, wavelength division multiplexer, image intensifer and optical fiber.Wherein, wavelength division multiplexer comprises wave multiplexer and channel-splitting filter, and channel-splitting filter adopts traditional packet filtering device usually.
Fig. 1 is the architecture (is example with 40 ripples) of wdm system and the synoptic diagram that the legacy packets filter is finished 40 road professional transmission:
OTU is an optical convering unit, can be the 3R photoelectricity light conversion of single channel light signal, OTU
1The expression wavelength is λ
1OTU, OTU
40The expression wavelength is λ
40OTU;
OM represents wave multiplexer, and OD represents channel-splitting filter, and adopts the legacy packets filter;
Can see in the OD detail drawing in Fig. 1, key light enters first bandpass filter A of first order bandpass filter group, enter the next bandpass filter B of this group then by the cascade port of bandpass filter, 40 wavelength are divided into two groups of red tape and blue zones by above-mentioned two bandpass filter.The passband of two bandpass filter exists overlapping, four WDM wavelength that covered, and promptly the 19th, 20,21,22 ripples can not be the black wavelengths that system can't use by any one complete the leaching in two bandpass filter; Equally, arrived next stage bandpass filter group, four black wavelengths of the overlapping generation of adjacent two bandpass filter passbands have also been arranged, i.e. the 9th, 10,31,32 ripples; The wdm system of 40 ripples like this can only filtering go out 32 ripples by the legacy packets filter, has 8 black wavelengths not to be applied in system.
As mentioned above, prior art uses traditional packet filtering device can't make full use of fiber bandwidth, causes the wasting of resources, increases the lower deployment cost of optical-fiber network.
Summary of the invention
The technical problem to be solved in the present invention is, overcome the deficiency of the legacy packets filter of wdm system in the prior art, a kind of packet filtering device that is applied to the non-black wavelength of wdm system is proposed, and proposed a kind of simple and effective black wavelength of avoiding producing, and can leach the packet filtering method of the whole wavelength of wdm system continuously at output port.
In order to address the above problem, the invention provides a kind of packet filtering device of non-black wavelength, a kind of packet filtering device of non-black wavelength comprises bandpass filter assembly, a plurality of m wave separater device and an optical splitter, wherein:
Described optical splitter is used for key light is divided into the two-beam signal;
Described bandpass filtering assembly is divided into odd number group and even number set, comprises n/m bandpass filter altogether, and n is the light wave sum, the wavelength number that m is covered for each bandpass filter pass band width, and n/m rounds up during not for integer; Two groups of wave filters receive a branch of light signal respectively, and the bandwidth of any two wave filters on the same group m wavelength at least at interval;
Each channel-splitting filter in described a plurality of m wave separater device links to each other with the output of a bandpass filter.
Further, above-mentioned packet filtering device also can have following characteristics: described optical splitter is the two-beam signal that key light branch success ratio is equated.
Further, above-mentioned packet filtering device also can have following characteristics: a plurality of wave filters of described odd number group and even number set interconnect by the cascade port, and a bandwidth granularity m wavelength of two adjacent wave filters.
The present invention also provides a kind of packet filtering method that realizes non-black wavelength in wdm system, comprises following steps:
1) key light enters from optical splitter, is divided into the two-beam signal, inputs to odd number group and even number set wave filter respectively;
2) each wave filter in odd number group and the even number set wave filter carries out filtering to described light signal, output n/m bundle light signal is to the m wave separater device of equal number, the bandwidth of the light signal of any on the same group two wave filters output is m wavelength at least at interval, wherein n is the light wave sum, the wavelength number that m is covered for each bandpass filter pass band width, n/m rounds up during not for integer;
3) m wave separater device is decomposed into continuous non-black wavelength signal with the light signal of wave filter output.
Further, above-mentioned packet filtering method also can have following characteristics: described optical splitter is the two-beam signal that key light branch success ratio is equated.
Further, above-mentioned packet filtering method also can have following characteristics: behind described light signal input odd number group and the even number set wave filter, be each wave filter that is transferred to this group by the cascade port of wave filter on the same group, and a bandwidth granularity m wavelength of two adjacent wave filters output light signals.
The present invention interleaves filtering technique by adopting beam split and odd even, reached the effect that the packet filtering device is exported continuous non-black wavelength.
Description of drawings
Fig. 1 is the application function synoptic diagram of legacy packets filter in wdm system;
Fig. 2 is according to the application synoptic diagram of non-black wavelength packet filtering device of the present invention in wdm system;
Fig. 3 is the synoptic diagram that non-black wavelength packet filtering device according to the present invention is applied to 80 ripple 50G channel spacing wdm systems.
Embodiment
The present invention will be described in detail below in conjunction with drawings and Examples.
Technical scheme main points of the present invention are: by using optical splitter, odd even bandpass filtering assembly and m wave separater device, at first key light is divided into 2 identical bundle light of power, 2 bundle light are imported odd even bandpass filtering assembly respectively, export corresponding m wave separater device to through filtering, finally export the light signal of continuous non-black wavelength.
Fig. 2 is according to the application synoptic diagram of non-black wavelength packet filtering device of the present invention in wdm system, is example with 40 ripple wdm systems.
As shown in Figure 2, wdm system non-black wavelength packet filtering device according to the present invention is made up of three parts: optical splitter, odd even bandpass filtering assembly, m wave separater device (m=10):
Optical splitter is used for key light is divided into the identical two-beam signal of power, outputs to the bandpass filter of odd number group and even number set respectively;
Odd even bandpass filtering assembly, comprise 4 bandpass filter, (most applications is to divide equally to be used for that the system wavelength bandwidth is divided into 4 groups, but not must be like this), the pass band width of each bandpass filter is 10 wavelength coverages, bandpass filter 1 ' (wavelength 1～10 scope) and 3 ' (wavelength 21～30 scopes) are odd number group, bandpass filter 2 ' (wavelength 11～20 scopes) and 4 ' (wavelength 31～40 scopes) are even number set, cascade port by wave filter between the bandpass filter of odd number group connects, and also connects with cascade port between the bandpass filter of even number set.
4 m wave separater devices (among Fig. 2 be example with 10 wave separater devices) are used for receiving respectively the light signal of 4 bandpass filter outputs, and the WDM wavelength signals of m of filtering output.
To describe the non-black wavelength packet filtering method that is applied to wdm system according to of the present invention according to Fig. 2 below, this method comprises the steps:
A) key light enters from 50/50 optical splitter, is divided into the two-beam signal, is preferably the identical two-beam signal of power;
B) a branch of bandpass filter 1 ' that inputs to the odd even filtering unit in the two-beam signal is imported on the same group bandpass filter 3 ' again by the cascade port after bandpass filter 1 ' filtering; Another bundle inputs to the bandpass filter 2 ' of odd even filtering unit, imports on the same group bandpass filter 4 ' again by the cascade port after bandpass filter 2 ' filtering.Odd number group bandpass filter output wavelength scope 1～10,21～30; Even number set bandpass filter output wavelength scope 11～20,31～40.
D) the 10 wave separater devices that enter respective wavelength respectively from the light signal of bandpass filter 1 '～4 ' output carry out filtering one by one.
As mentioned above, because the bandpass filter edge of each group does not have overlapping phenomenon, therefore can not produce black wavelength.Such 40 ripple wdm systems can be exported 40 wave optical signals of continuous non-black wavelength.
Below with C-Band, 80 ripples, 50G packet filtering device (channel-splitting filter) at interval is further described the non-black wavelength packet filtering method that is applied to wdm system according to the present invention for example.
As shown in Figure 3:
Channel-splitting filter comprises and is divided into two groups wave filter by odd even, every group of bandpass filter that comprises 5 cascades, and the pass band width of each bandpass filter is 8 wavelength coverages;
Light signal is imported two groups of wave filters respectively after entering 50/50 optical splitter;
The output of each bandpass filter is resolved into continuous non-black wavelength signal by one 8 wave separater device with the output light signal of wave filter again in two groups of wave filters.
Wdm system for other number of wavelengths, method set forth in the present invention is suitable for too: for n wavelength wdm system, configuration m (the wave separater device of 2m＜n), then there be n/m bandpass filter, the pass band width of each bandpass filter covers m wavelength, these wave filters are divided into odd number group and even number set bandpass filtering assembly and interleave configuration, and promptly wave filter interconnects by cascade port on the same group, and the bandwidth granularity of adjacent two bandpass filter is a m wavelength.When n/m is non-integer, round up.System's key light is divided into the two-beam signal by 50/50 optical splitter and enters odd even bandpass filtering assembly respectively, exports m wave separater device respectively after the filtering to, finally exports the continuous n wavelength of non-black wavelength by m wave separater device.Got 40 o'clock as n, system is 40 ripple wdm systems, gets 80 o'clock as n, and system is 80 ripple wdm systems.
The present invention also can have other various embodiments; under the situation that does not deviate from spirit of the present invention and essence thereof; those of ordinary skill in the art are when making various corresponding changes and distortion according to the present invention, and these change and be out of shape the protection domain that all should belong to the appended claim of the present invention accordingly.
Claims (6)
1. the packet filtering device of a non-black wavelength comprises bandpass filter assembly, a plurality of m wave separater device, it is characterized in that this device also comprises optical splitter, wherein:
Described optical splitter is used for key light is divided into the two-beam signal;
Described bandpass filtering assembly is divided into odd number group and even number set, comprises n/m bandpass filter altogether, and n is the light wave sum, the wavelength number that m is covered for each bandpass filter pass band width, and n/m rounds up during not for integer; Two groups of wave filters receive a branch of light signal respectively, and the bandwidth of any two wave filters on the same group m wavelength at least at interval;
Each channel-splitting filter in described a plurality of m wave separater device links to each other with the output of a bandpass filter.
2. packet filtering device as claimed in claim 1 is characterized in that, described optical splitter is the two-beam signal that key light branch success ratio is equated.
3. packet filtering device as claimed in claim 1 is characterized in that, a plurality of wave filters of described odd number group and even number set interconnect by the cascade port, and a bandwidth granularity m wavelength of two adjacent wave filters.
4. packet filtering method that realizes non-black wavelength in wavelength-division multiplex system is characterized in that described method comprises following steps:
1) key light enters from optical splitter, is divided into the two-beam signal, inputs to odd number group and even number set wave filter respectively;
2) each wave filter in odd number group and the even number set wave filter carries out filtering to described light signal, output n/m bundle light signal is to the m wave separater device of equal number, the bandwidth of the light signal of any on the same group two wave filters output is m wavelength at least at interval, wherein n is the light wave sum, the wavelength number that m is covered for each bandpass filter pass band width, n/m rounds up during not for integer;
3) m wave separater device is decomposed into continuous non-black wavelength signal with the light signal of wave filter output.
5. packet filtering method as claimed in claim 4 is characterized in that, described optical splitter is the two-beam signal that key light branch success ratio is equated.
6. packet filtering method as claimed in claim 4, it is characterized in that, behind described light signal input odd number group and the even number set wave filter, be each wave filter that is transferred to this group by the cascade port of wave filter on the same group, and a bandwidth granularity m wavelength of two adjacent wave filters output light signals.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101115262A CN100549741C (en) | 2006-08-21 | 2006-08-21 | A kind of packet filtering device of non-black wavelength and packet filtering method thereof |
| PCT/CN2006/003751 WO2008028363A1 (en) | 2006-08-21 | 2006-12-30 | Grouping filtering device and method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2006101115262A CN100549741C (en) | 2006-08-21 | 2006-08-21 | A kind of packet filtering device of non-black wavelength and packet filtering method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN101131451A true CN101131451A (en) | 2008-02-27 |
| CN100549741C CN100549741C (en) | 2009-10-14 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112399283A (en) * | 2019-08-16 | 2021-02-23 | 中国移动通信有限公司研究院 | Wavelength division multiplexing system, local side device and far-end device |
| CN116055924A (en) * | 2023-01-28 | 2023-05-02 | 中兴通讯股份有限公司 | Optical splitter of passive optical network and optical signal processing method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020007489A1 (en) * | 2018-07-06 | 2020-01-09 | Huawei Technologies Co., Ltd. | A picture encoder, a picture decoder and corresponding methods |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CA2302008A1 (en) * | 2000-03-22 | 2001-09-22 | Tellamon Photonic Networks Inc. | Mach-zehnder based filter demultiplexers and method |
| CN2479687Y (en) * | 2000-12-29 | 2002-02-27 | 武汉华工飞腾光子科技有限公司 | Wavelength-division multiplexer |
| FR2830145B1 (en) * | 2001-09-27 | 2004-04-16 | Cit Alcatel | OPTICAL DEMULTIPLEXING SYSTEM OF WAVELENGTH BANDS |
| ATE297618T1 (en) * | 2002-04-30 | 2005-06-15 | Cit Alcatel | NESTHING AND UNNESSING |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112399283A (en) * | 2019-08-16 | 2021-02-23 | 中国移动通信有限公司研究院 | Wavelength division multiplexing system, local side device and far-end device |
| CN112399283B (en) * | 2019-08-16 | 2021-10-26 | 中国移动通信有限公司研究院 | Wavelength division multiplexing system, local side device and far-end device |
| CN116055924A (en) * | 2023-01-28 | 2023-05-02 | 中兴通讯股份有限公司 | Optical splitter of passive optical network and optical signal processing method |
| WO2024156214A1 (en) * | 2023-01-28 | 2024-08-02 | 中兴通讯股份有限公司 | Optical splitter of passive optical network and optical signal processing method therefor |
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| Publication number | Publication date |
|---|---|
| WO2008028363A1 (en) | 2008-03-13 |
| CN100549741C (en) | 2009-10-14 |
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