CN1402460A - All-optical exchange structure with extensible multicast function - Google Patents
All-optical exchange structure with extensible multicast function Download PDFInfo
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- CN1402460A CN1402460A CN 02136829 CN02136829A CN1402460A CN 1402460 A CN1402460 A CN 1402460A CN 02136829 CN02136829 CN 02136829 CN 02136829 A CN02136829 A CN 02136829A CN 1402460 A CN1402460 A CN 1402460A
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Abstract
The invention exchange structure is composed of the 2N entries of the erbium-doped optical fiber amplifier, the N entries of the 1XM optical wave length division demultiplexer, the MN entries 1XN internal multicast module and the N entries of MNX1 optical mixer. Here, N is numer of the input and outupt port supported by the exchange structure. M is the number of the wavelength channel possible to transfer by each port. The input signals through the fiber amplifier and demultiplexer are connected to the internal multicast modules respectively. The output of each internal multicast module through the different optical mixer and the fiber amplifier are connected to the output port of the exchange structure. The internal multicast module consists of the controllable optical switch etc combined neatly.
Description
Technical field:
The present invention relates to a kind of optical exchange structure, relate in particular to a kind of extendible full optical exchange structure of multicast functionality that has.This switching fabric is fit to IP operation and realizes broadcast capability in all-optical network, is applicable to the optical cross connection node in the all-optical network.Belong to the optical communication technique field.
Background technology:
At present, make communication network just gradually by based on circuit switching based on developing rapidly of the internet of IP, the mode of optimizing the voice-over business is to based on packet switching, and the mode of optimizing bearing data service develops.The application of video request program, conferencing over ip and other various novel multimedia services is had higher requirement to the transfer capability of communication infrastructure network.The maturation and the extensive use of WDM (optical wavelength-division multiplex) technology make the broadband resource of optical fiber make full use of.Solved the bottleneck problem (HuMing of transmission capacity in the conventional communication networks simultaneously, Li Lemin.A reservation distribution method of channels for wavelengthdivision multiplexing networks.Journal of University of Electronic Science andTechnology of China, 1998.27 (3) .256-260).Thereby WDM technology is considered to the current a kind of mode the most attractive in the fiber resource of utilizing.How to utilize optical-fiber network to transmit IP operation, promptly IP is grouped in the online optimization transmission of WDM light has become current research focus.
For satisfying the requirement of network flexibility, survivability, also should solve the bottleneck problem of electronic type switching equipment in conjunction with various smooth switching technologies on the basis of wavelength division multiplexing.The dynamically transmission line of route of big capacity and energy is provided, makes node have Route Selection and light function of exchange flexibly.Core node in the all-optical network is optical cross-connection equipment (OXC), and the core of optical cross-connection equipment is the light crosspoint.It can make multipath light signal multiplexing in the optical fiber be cross connected to each destination neatly, also can realize the dynamic restructuring and self-healing (the Zhang Tao of network, Qu Kun, Qiu Qi, ATM photonic switch architecture based onWDM technology.Journal of University of Electronic Science and Technology ofChina.1998.27 (4): 371-374).The light crosspoint mainly contains space switching, time-division switching and wavelength-division exchange etc. at present.But in these structures, some no broadcast-capable, some only has the part extensibility.Though some is a non-blocking network, switching fabric is huge and complicated, is difficult for realizing (" All-Optical Communication Network " Gu Wanyi etc. writes, publishing house of Beijing University of Post ﹠ Telecommunication).
The optical exchange structure that occurs mainly contains following several form at present:
Based on spatial optical switches matrix and the right switching fabric of Wavelength division multiplexer/demultiplexer is to utilize Wave decomposing multiplexer that the WDM signal in the link is spatially separated, and utilizes the spatial optical switches matrix spatially to realize exchange then.Each wavelength signals directly is multiplexed in the output link through wavelength division multiplexer after finishing space exchange, and this switching fabric does not have the broadcast transmission ability.
Based on the switching fabric of spatial optical switches matrix and tunable optic filter be utilize coupler+tunable optic filter finish will input the WDM signal function of spatially separating, behind spatial optical switches matrix and wavelength shifter, by coupler each wavelength multiplexing is got up again.Though this switching fabric has the broadcast transmission ability, only have the wavelength modularity, do not have link module.
Switching fabric based on the dispensing coupled switch is people's propositions such as A.Watanabe, and this structure adopts a kind of dispersion coupled switch implementation space optical switch matrix function.Though this switching fabric has the broadcast transmission function, only have link module, and do not have the wavelength modularity.
Switching fabric based on parallel lambda switch is proposed by people such as M.Nishio.The corresponding lambda switch of its every input link, each lambda switch is made up of N 1 * M star coupler, a M N * 1 space exchange matrix, a M tunable optic filter, a M wavelength shifter and M * 1 star coupler.This switching fabric only has link module, does not have the wavelength modularity.(" All-Optical Communication Network " Gu Wanyi etc. writes, publishing house of Beijing University of Post ﹠ Telecommunication).
Summary of the invention:
The objective of the invention is at the deficiencies in the prior art, design proposes a kind of new extendible full optical exchange structure of multicast functionality that has, light exchanges on the connection device to make a certain lightwave signal import into, in Switching Module, can realize the signal replication of outlet arbitrarily, make this signal that a plurality of outputs can be arranged on optical cross-connection equipment, have two kinds of extensibilities of link module and wavelength modularity simultaneously, strengthen the exchange capacity of OXC in the all-optical network.
For realizing such purpose, the present invention adopts the inside multicast module with copy function in the inside of Switching Module.If this switching fabric is supported N input port and N output port, each port can transmit M wavelength channel, and (λ 1 ... λ M), then this Switching Module need be made of 2N erbium-doped fiber amplifier (EDFA), N 1 * M light wave decomposition multiplex device, the inner multicast module of MN 1 * N and N MN * 1 optical combiner.The N of a switching fabric input links to each other with N EDFA respectively, then is connected to the input of N 1 * M demodulation multiplexer respectively.The M of each a demodulation multiplexer output connects M the inner multicast module of 1 * N respectively, connects MN inner multicast module altogether.The N of each an inner multicast module output is connected to the input of N different MN * 1 optical combiner respectively.The same corresponding output of MN inner multicast module is connected to MN input of a MN * 1 optical combiner respectively.Each optical combiner has MN input, 1 output.Each exports EDFA of termination, then exports the output port of switching fabric to.
Wherein, the concrete connected mode of inner multicast module can have five kinds.Wherein first kind and second kind mainly comprises optical branching device, tunable wavelength converter, 1 * 1 controllable light switch, optical delay line (controllable light buffer).First kind of connected mode is made up of a tunable wavelength converter, 1 * N optical branching device, N 1 * 1 a controllable light switch and a N optical delay line (controllable light buffer).The input of inner multicast module is connected to the input of optical branching device through a tunable wavelength converter.Connect one 1 * 1 a controllable light switch and an optical delay line (controllable light buffer) behind each output port of the N of a 1 * N optical branching device output port.Wherein the tunable wavelength converter makes switching fabric can support virtual wavelength path, improves Wavelength reuse efficient.Optical branching device can make one tunnel light signal that enters shunt to N outlet, thereby can realize the multicast functionality of switching fabric.1 * 1 controllable light switch has two states: optical gate is logical or optical gate is obstructed.It can control corresponding state by control module according to the demand of business, thereby reaches the purpose of selecting different wave length, the output of different path.Add controllable light buffer (constituting) in 1 * 1 controllable light switch back, can solve the conflict that the light signal of broadcasting occurs when photosynthetic road by the optical delay line array.The tunable wavelength converter is placed the output of optical branching device, tunable wavelength converter of one output termination, then can constitute second kind of connected mode, this moment, an inner multicast module was made up of 1 * N optical branching device, a N tunable wavelength converter, N 1 * 1 a controllable light switch and N optical delay line (controllable light buffer).The function of tunable wavelength converter in second kind of connected mode and controllable light switch is integrated among the optical device SOA (semiconductor optical amplifier) finishes, be the third connected mode; Controllable light switch in second kind of connected mode and controllable light buffer function is integrated, form one and have controllable light buffer memory switch module, be the 4th kind of connected mode; The function of the tunable wavelength converter in second kind of connected mode, controllable light switch, controllable light buffer is integrated, realize finishing with a wavelength shifter with controllable light buffer memory switching function, be the 5th kind of connected mode.
Inside multicast module in this switching fabric can have the empty wavelength channel of support through the dynamic control of control module, and broadcasting transmits light signal, and dynamic controlled selection wavelength channel reaches by buffer memory and solves because there is the function of competition obstruction in multicast.Light wave decomposition multiplex utensil has the recovery of M different wave length with the function of signal demultiplexing to the different optical fiber of M root.The effect of optical combiner (being coupler) is to export selecting the light signal of output to be coupling on the optical fiber through inner multicast module.The image intensifer that disposes in switching fabric (EDFA) is used to remedy the loss that brings through Switching Module owing to light signal.
Switching fabric of the present invention can have link module and two kinds of performances of wavelength modularity simultaneously.If the input and output number of links of OXC increases to some extent, then need not change existing switching fabric, only need increase correlation module and get final product, promptly have the link module characteristic.Respectively increase a link as input and output, then only need increase a light wave decomposition multiplex device in this switching fabric, M inner multicast module and an optical combiner get final product.If certain bar link wavelength number of OXC increases to some extent, the number of wavelengths of establishing in the every optical fiber increases by 1, then only need increase N inner multicast module and get final product, and promptly has the wavelength modular character again.Having this two kinds of scalabilities simultaneously, is non-existent in the switching fabric of this former proposition.
Controllable light device in the inner multicast module of switching fabric of the present invention can be controlled by the control module among the OXC, thereby OXC has very strong flexibility.Configuration tunable wavelength converter can be supported the dynamic wavelength routing function in the inner multicast module.According to the difference (controls of promptly different exchange granularities) of control module mechanism, also can be used for light burst-switched function simultaneously.Be that this switching fabric can use in the OXC that has wavelength routing function and light burst-switched function respectively.But need to adopt the controllable light device of different exchange granularities (being the difference of conversion time).This exchange mechanism has very strong suitable effect again, and each components and parts all can adopt existing mature technology.Wherein Wave decomposing multiplexer can adopt normally used film filter plate type demodulation multiplexer.The controllable light switch can adopt MEMS controllable light switch and LiNbO
3Controllable light switch (selecting) according to difference exchange granularity.The image intensifer of input and output can adopt EDFA (erbium-doped fiber amplifier) to realize.The tunable wavelength converter can adopt cross-gain modulation semiconductor optical amplifier and cross-phase modulation semiconductor optical amplifier.The controllable light buffer can adopt dynamic controllable type optical delay line array to realize.Whole switching fabric constitutes by optical exchanger spare, has demonstrated fully the transparency and the flexibility of WDM all optical network.
The present invention has the full optical exchange structure of expanding of multicast functionality, can support point-to-point and two kinds of load modes putting multicast simultaneously, for the broadcast-type IP operation realizes providing a kind of feasible pattern in all-optical network.The present invention has good capacity extensions performance, has two kinds of expansion capacities of link module and wavelength modularity, and can realize the nonblocking performance of network by the controllable light buffer.Switching fabric of the present invention can be supported the dynamic wavelength routing function, can utilize the limited wavelength resource, improves wavelength multiplexing efficient, can be applicable to various optical network nodes.
Description of drawings:
Fig. 1 is an optical exchange structure schematic diagram of expanding broadcast mode of the present invention.
The optical device that mainly comprises among Fig. 1 has EDFA erbium-doped fiber amplifier (1), Wave decomposing multiplexer (2), inner multicast module (3), optical combiner (4).Wherein inner multicast module (3) comprises tunable wavelength converter (5), optical branching device (6), controllable light switch (7) and controllable light buffer (8).
Fig. 2 is five kinds of implementations of inner multicast module of the present invention (3).
Wherein, comprise tunable wavelength converter (5), optical branching device (6), controllable light switch (7) and controllable light buffer (8) among Fig. 2 (a) and Fig. 2 (b).Comprise optical branching device (6), semiconductor optical amplifier SOA (9) and controllable light buffer (8) among Fig. 2 (c).Comprise optical branching device (6), tunable wavelength converter (5) and controllable light buffer memory switch module (10) among Fig. 2 (d).Comprise optical branching device (6) among Fig. 2 (e) and have the wavelength shifter (11) of controllable light buffer memory switching function.
Fig. 3 is the link module schematic diagram of switching fabric of the present invention.
Fig. 4 is the wavelength modularity schematic diagram of switching fabric of the present invention.
Fig. 5 realizes the multicast functionality schematic diagram for switching fabric of the present invention.
Embodiment:
Be described in detail below in conjunction with the embodiment of accompanying drawing technical solution of the present invention.
With N * N switching fabric is example.As shown in Figure 1, the N of a switching fabric input links to each other with N EDFA (1) respectively, then is connected to the input of N demodulation multiplexer (2) respectively.M the output of each demodulation multiplexer (2) connects M inner multicast module (3) respectively, connects MN inner multicast module (3) altogether.N output of each inner multicast module (3) is connected to the input of N different optical combiners (4) respectively.The same corresponding output of MN inner multicast module (3) is connected to MN input of an optical combiner (4) respectively.Each optical combiner has MN input, 1 output.Each exports an EDFA of termination (1), then exports the output port of switching fabric to.
Inside multicast module (3) in the switching fabric can have five kinds of implementations, shown in Fig. 2 (a), Fig. 2 (b), Fig. 2 (c), Fig. 2 (d) and Fig. 2 (e).If tunable wavelength converter (5) is placed on optical branching device (6) front end, then an inner multicast module (3) is made of a tunable wavelength converter (5), an optical branching device (6), a N controllable light switch (7) and N controllable light buffer (8), shown in Fig. 2 a; If tunable wavelength converter (5) is placed on optical branching device (6) rear end, then an inner multicast module (3) is made of an optical branching device (6), a N tunable wavelength converter (5), a N controllable light switch (7) and N controllable light buffer (8), shown in Fig. 2 b; If tunable wavelength converter (5) and controllable light switch (7) function are merged, can realize by a SOA semiconductor optical amplifier (9).Then an inner multicast module (3) is made of an optical branching device (6), a N SOA (9) and N controllable light buffer (8), shown in Fig. 2 c; If it is controllable light switch (7) and controllable light buffer (8) is integrated, can realize by a light buffer memory switch module (10), then an inner multicast module (3) is made of an optical branching device (6), a N tunable wavelength converter (5) and N light buffer memory switch module (10), shown in Fig. 2 d.If tunable wavelength converter (5) and light buffer memory switch module (10) function integrate, also can constitute a wavelength shifter (11) with controllable cache switching function, then an inner multicast module (3) is made of an optical branching device (6) and N the wavelength shifter (11) with controllable cache switching function, shown in Fig. 2 e.
In five kinds of specific implementations of inner multicast module (3), comprising tunable wavelength converter (5) make switching fabric can support virtual wavelength path, thereby can make full use of limited wavelength resource, improve Wavelength reuse efficient.Optical branching device (6) can make one tunnel light signal that enters shunt to N outlet, thereby can realize the multicast functionality of switching fabric.1 * 1 controllable light switch (7) has two states: optical gate is logical or optical gate is obstructed.It can control corresponding state by control module according to the demand of business, thereby reaches the purpose of selecting different wave length, the output of different path.Add controllable light buffer (8) (constituting) in 1 * 1 controllable light switch back, can solve the conflict that the light signal of broadcasting occurs when photosynthetic road by the optical delay line array.SOA (9) can finish the function of tunable wavelength converter (5) and 1 * 1 controllable light switch (7).Controllable light buffer memory switch module (10) can be realized by the optical delay line switch arrays, finish the function of controllable light switch (7) and controllable light buffer (8).Wavelength shifter (11) with controllable light buffer memory switching function can be finished the function of tunable wavelength converter (5) and controllable light buffer memory switch module (10).Combine the inside multicast module (3) that constitutes by these equipment and can have the empty wavelength channel of support through the dynamic control of control module, broadcasting transmits light signal, dynamic controlled selection wavelength channel and the function that exists competition to block owing to multicast by the buffer memory solution.Front end in inner multicast module (3) is a light wave decomposition multiplex device (2), and its effect is to use the signal demultiplexing to the different optical fiber of M root the recovery of M different wave length, and an optical fiber is supported a wavelength.The back termination optical combiner (being coupler) (4) of inner multicast module (3), its effect are to export selecting the light signal of output to be coupling on the optical fiber through inner multicast module.At the input and the output configuration image intensifer (EDFA) (1) of exchange mechanism, to remedy the loss that brings through Switching Module owing to light signal.
When Optical Switch Node need be expanded, the number of links of increasing and number of wavelengths dual mode are arranged.Increase the input and output number of links as need, link of every increase, this switching fabric only need increase a light wave decomposition multiplex device (2), and an individual inner multicast module (3) of M and an optical combiner (4) get final product, as shown in phantom in Figure 3.Be that this exchange mechanism has link module; If certain bar link wavelength number of OXC increases to some extent, the number of wavelengths of establishing in the every optical fiber increases by 1, then only need increase N inner multicast module (3) and get final product, and promptly has the wavelength modular character again, as shown in phantom in Figure 4.
Figure 3 shows that the link module of switching fabric.When switching fabric is N * N switching fabric, when every link comprised M wavelength, this switching fabric needed by N 1 * M light wave decomposition multiplex device (2), the inner multicast module (3) of MN 1 * N and N MN * 1 optical combiner (4) formation.When the number of links of switching fabric adds 1, when expanding to the switching fabric of (N+1) * (N+1), according to the connected mode of switching fabric, need to increase by 11 * M light wave decomposition multiplex device (2), a M inner multicast module (3) and 1 optical combiner (4), as shown in phantom in Figure 3.At this moment inside multicast module is 1 * (N+1) inner multicast module, the inner multicast module of the original 1 * N of switching fabric will be extended to 1 * (N+1) inner multicast module simultaneously, that is to say that the 1 * N optical branching device (6) in the inner multicast module will be extended to 1 * (N+1) optical branching device.Original MN * 1 optical combiner will be extended to [M (N+1)] * 1 optical combiner.The expansion of the output port of the optical branching device here and the input port of optical combiner can be to reserve when the switching fabric initial design, does not just connect.When switching fabric need be expanded, the port that reserves can directly connect the corresponding light device, thereby realized the link module of switching fabric.The quantity of optical device reservation port determines the quantity of the link expanded of this switching fabric.
Figure 4 shows that the wavelength modularity of switching fabric.When switching fabric is N * N switching fabric, when every link comprised M wavelength, this switching fabric needed by N 1 * M light wave decomposition multiplex device (2), the inner multicast module (3) of MN 1 * N and N MN * 1 optical combiner (4) formation.When the number of wavelengths of every link of switching fabric adds 1,, only need increase N the inner multicast module of 1 * N (3) and get final product, as shown in phantom in Figure 4 according to the connected mode of switching fabric.Original 1 * M the light wave of switching fabric decomposition multiplex device will be extended to 1 * (M+1) Wave decomposing multiplexer simultaneously, and original MN * 1 optical combiner will be extended to [(M+1) N] * 1 optical combiner.The expansion of the output port of the light wave decomposition multiplex device here and the input port of optical combiner is to reserve when the switching fabric initial design equally.When switching fabric need be expanded, the port that reserves can directly connect the corresponding light device, thereby realized the wavelength modularity of switching fabric.The quantity of optical device reservation port determines the quantity of the wavelength expanded of this switching fabric.
The multicast functionality of switching fabric of the present invention can be illustrated by Fig. 5.Thick dashed line is represented the transmission of a point-to-point light signal among Fig. 5.Need to be delivered to outlet through switching fabric be 1 if inlet is the light signal of λ 1 for wavelength on the link of N, and wavelength is on the path of λ i.Link is that tunable wavelength converter (5) the control module control in OXC on the N makes its wavelength of optical signal change λ i into by λ 1, then enter optical branching device (6) along separate routes, the light signal after is sent in all controllable light switches (7) of inner multicast module (3) along separate routes.Because this signal only need be sent to article one output link, so these controllable light switches are controlled the control of module, make the 1 tunnel optical switch put the logical state of optical gate, the 2nd puts the obstructed state of optical gate to the optical switch on N road, thereby have only one road light signal through controllable light buffer (8), export through optical combiner (4).
Heavy line is partly represented the transmission of a point-to-multipoint light signal among Fig. 5.If inlet be on 1 the link wavelength be the light signal of λ 1 need to be delivered to outlet through switching fabric be 2 and N, wavelength is on the path of λ j.Then link is that to make wavelength conversion be λ j for the controlled module controls of tunable wavelength converter (5) on 1, behind optical branching device (6), the controlled module controls of controllable light switch (7) have the 2 the road and N road optical switch to the logical state of optical gate, other optical switch is to the obstructed state of optical gate, thus light signal behind controllable light buffer (8) and optical combiner (4) respectively the 2 the road and the output of N way outlet.
Claims (6)
1, a kind of have an extendible full optical exchange structure of multicast functionality, it is characterized in that by 2N erbium-doped fiber amplifier (1), N 1 * M light wave decomposition multiplex device (2), MN the inner multicast module (3) of 1 * N and N MN * 1 optical combiner (4) constitute, wherein, N is the input/output port that switching fabric is supported, M is the transmissible wavelength channel number of each port, N input is connected to the input of N 1 * M demodulation multiplexer (2) respectively through N erbium-doped fiber amplifier (1), M the output of each demodulation multiplexer (2) connects M the inner multicast module (3) of 1 * N respectively, N output of each inner multicast module (3) is connected to the input of N different MN * 1 optical combiner respectively, the same corresponding output of MN inner multicast module (3) is connected to MN input of a MN * 1 optical combiner (4) respectively, and the output of each optical combiner (4) exports the output port of switching fabric to behind an erbium-doped fiber amplifier (1).
2, has an extendible full optical exchange structure of multicast functionality as claim 1 is said, it is characterized in that inner multicast module (3) is made up of a tunable wavelength converter (5), 1 * N optical branching device (6), N 1 * 1 a controllable light switch (7) and N controllable light buffer (8), the input of inner multicast module (3) is connected to the input of 1 * N optical branching device (6) through a tunable wavelength converter (5), and each output port of optical branching device (6) connects a controllable light switch (7) and a controllable light buffer (8).
3, has an extendible full optical exchange structure of multicast functionality as claim 1 is said, it is characterized in that inner multicast module (3) is made up of 1 * N optical branching device (6), a N tunable wavelength converter (5), N 1 * 1 a controllable light switch (7) and N controllable light buffer (8), the input of inner multicast module (3) is connected to the input of 1 * N optical branching device (6), and each output of optical branching device (6) connects a tunable wavelength converter (5), 1 * 1 a controllable light switch (7) and a controllable light buffer (8) respectively.
4, has an extendible full optical exchange structure of multicast functionality as claim 1 is said, it is characterized in that inner multicast module (3) is made of 1 * N optical branching device (6), a N SOA semiconductor optical amplifier (9) and N controllable light buffer (8), the input of inner multicast module (3) is connected to the input of optical branching device (6), and each output of optical branching device (6) connects a SOA semiconductor optical amplifier (9) and a controllable light buffer (8) respectively.
5, has an extendible full optical exchange structure of multicast functionality as claim 1 is said, it is characterized in that inner multicast module (3) is made of 1 * N optical branching device (6), a N tunable wavelength converter (5) and N controllable light buffer memory switch module (10), the input of inner multicast module (3) is connected to the input of optical branching device (6), and each output of optical branching device (6) connects a tunable wavelength converter (5) and a controllable light buffer memory switch module (10) respectively.
6, has an extendible full optical exchange structure of multicast functionality as claim 1 is said, it is characterized in that inner multicast module (3) is made of 1 * N optical branching device (6), the individual wavelength shifter (11) with controllable light buffer memory switching function of N, the input of inner multicast module (3) is connected to the input of optical branching device (6), and each output of optical branching device (6) connects a wavelength shifter (11) with controllable cache switching function respectively.
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| WO2007143945A1 (en) * | 2006-06-08 | 2007-12-21 | Huawei Technologies Co., Ltd. | Wavelength routing module, system and method therewith |
| CN100373192C (en) * | 2006-04-13 | 2008-03-05 | 电子科技大学 | Fanout digit variable optical shunt |
| CN100428660C (en) * | 2004-01-14 | 2008-10-22 | 电子科技大学 | Optical burst exchange node with internal acceleration |
| CN101466053B (en) * | 2009-01-13 | 2011-11-30 | 中兴通讯股份有限公司 | Apparatus and method for implementing optical network node |
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| US5724167A (en) * | 1995-11-14 | 1998-03-03 | Telefonaktiebolaget Lm Ericsson | Modular optical cross-connect architecture with optical wavelength switching |
| EP1162862A2 (en) * | 2000-06-08 | 2001-12-12 | Alcatel | Optical IP switching router architecture |
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| CN100373192C (en) * | 2006-04-13 | 2008-03-05 | 电子科技大学 | Fanout digit variable optical shunt |
| WO2007143945A1 (en) * | 2006-06-08 | 2007-12-21 | Huawei Technologies Co., Ltd. | Wavelength routing module, system and method therewith |
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| CN104238028A (en) * | 2014-09-02 | 2014-12-24 | 新中合光电科技（保靖）有限公司 | Intelligent optic fiber jumper connection device |
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| CN106716891A (en) * | 2015-06-25 | 2017-05-24 | 华为技术有限公司 | Integrated all-optical switching node |
| CN106716891B (en) * | 2015-06-25 | 2018-11-13 | 华为技术有限公司 | A kind of integrated-type All-optical switching node |
| WO2019034016A1 (en) * | 2017-08-15 | 2019-02-21 | Huawei Technologies Co., Ltd. | All-optical networks based on switchable wavelength connects (swcs) |
| US10645473B2 (en) | 2017-08-15 | 2020-05-05 | Futurewei Technologies, Inc. | All-optical networks based on switchable wavelength connects (SWCs) |
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| CN1330120C (en) | 2007-08-01 |
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