WO2018083886A1 - Nœud de communication optique - Google Patents

Nœud de communication optique Download PDF

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Publication number
WO2018083886A1
WO2018083886A1 PCT/JP2017/032868 JP2017032868W WO2018083886A1 WO 2018083886 A1 WO2018083886 A1 WO 2018083886A1 JP 2017032868 W JP2017032868 W JP 2017032868W WO 2018083886 A1 WO2018083886 A1 WO 2018083886A1
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WIPO (PCT)
Prior art keywords
wavelength
splitters
selective switches
optical communication
communication node
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PCT/JP2017/032868
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English (en)
Japanese (ja)
Inventor
紀代 石井
井上　崇
並木　周
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国立研究開発法人産業技術総合研究所
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Publication of WO2018083886A1 publication Critical patent/WO2018083886A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
    • H04Q3/52—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using static devices in switching stages, e.g. electronic switching arrangements

Definitions

  • the present invention relates to an optical communication node, and more specifically, to a node configuration for efficiently performing optical communication on all optical paths between nodes by sharing a wavelength converter in an optical communication network.
  • wavelength division multiplexing WDM transmission
  • optical communication nodes that switch communication channels in the optical domain are becoming increasingly important.
  • WDM transmission wavelength division multiplexing
  • optical communication nodes that switch communication channels in the optical domain are becoming increasingly important.
  • wavelength uniqueness of communication channels all on the path
  • wavelength collision there are multiple communication channels of the same wavelength on the same optical link
  • optical signals are electrically terminated on a node-by-node basis, so the wavelength of the communication channel can be set for each link, and if communication resources have free capacity, there is no communication demand. It was possible to allocate communication resources. As a result, it was possible to utilize communication resources without being restricted by the wavelength uniqueness of the communication channel.
  • this system since all communication channels are electrically terminated in all communication nodes, it is necessary to introduce many expensive optical transceivers. Therefore, introduction of an optical communication node for switching a communication channel in the optical region and relaxation of wavelength identity of a communication channel in which a wavelength converter is introduced are performed.
  • Wavelength conversion techniques include all-optical wavelength conversion (light-> light (OO) conversion) and wavelength conversion accompanied by electrical conversion (light-> electricity-> light (OEO) conversion).
  • OO light-> light
  • OEO optical conversion
  • the wavelength converter cannot be used simultaneously in a plurality of channels, and it is necessary to introduce a large number of expensive wavelength converters. For this reason, it is impossible to respond to the recent demand for cost reduction and energy saving in communication nodes.
  • the all-optical wavelength conversion can convert the wavelength of a plurality of channels simultaneously by the same amount. Accordingly, there is a need for an optical network that allows efficient utilization of communication resources by introducing an all-optical wavelength converter in an optical communication node.
  • Patent Document 1 discloses an optical path network using a wavelength converter for all-optical wavelength conversion.
  • this optical path network two wavelength converters are provided for each communication node, and WDM transmission with wavelength conversion is performed between the communication nodes.
  • Patent Document 1 does not disclose a node configuration that can share a wavelength converter simultaneously with a plurality of optical paths and wavelengths.
  • An object of the present invention is to provide a node configuration capable of sharing a wavelength converter simultaneously and flexibly with a plurality of optical paths and wavelengths in an optical communication network that performs wavelength division multiplexing communication (WDM transmission).
  • WDM transmission wavelength division multiplexing communication
  • the optical communication node provides an optical communication node disposed between a plurality of input ports and a plurality of output ports.
  • the optical communication node includes at least one splitter connecting a plurality of splitters, a plurality of wavelength selective switches connected to the plurality of splitters, at least one output of the plurality of wavelength selective switches, and at least one input of the plurality of splitters. And at least one wavelength converter disposed on the path.
  • At least one of the splitters equally divides the wavelength-converted wavelength light received from at least one wavelength converter and outputs it to a plurality of wavelength selective switches.
  • Each of the other splitters other than the at least one splitter equally divides the wavelength division multiplexed light received from the corresponding one of the plurality of input ports and outputs it to the plurality of wavelength selective switches.
  • At least one of the wavelength selective switches outputs wavelength light selected from wavelength division multiplexed light received from each of the other splitters other than at least one to at least one wavelength converter.
  • each of the other wavelength selective switches other than at least one of the wavelength-converted wavelength light received from at least one of the splitters or wavelength division multiplexed light received from each of the other splitters other than at least one
  • the selected wavelength light is output to a corresponding one of the plurality of output ports.
  • An optical communication node provides an optical communication node disposed between a plurality of input ports and a plurality of output ports.
  • the optical communication node connects at least a plurality of wavelength selective switches, a plurality of splitters connected to the plurality of wavelength selective switches, at least one output of the plurality of splitters, and at least one input of the plurality of wavelength selective switches.
  • at least one wavelength converter disposed on one path.
  • At least one of the wavelength selective switches selects wavelength light after wavelength conversion received from at least one wavelength converter and outputs the wavelength light to a plurality of splitters equally.
  • Each of the other wavelength selective switches other than at least one outputs the wavelength light selected from the wavelength division multiplexed light received from the corresponding one of the plurality of input ports equally to the plurality of splitters.
  • At least one of the splitters outputs wavelength light selected from the wavelength division multiplexed light received from each of the other wavelength selective switches other than at least one to at least one wavelength converter.
  • each of the other splitters other than the at least one splitter receives wavelength-converted wavelength light received from at least one of the wavelength selective switches, or wavelength division multiplexed light received from each of the other wavelength selective switches other than at least one. Is output to the corresponding one of the plurality of output ports.
  • An optical communication node provides an optical communication node disposed between a plurality of input ports and a plurality of output ports.
  • the optical communication node includes a plurality of splitters, a plurality of wavelength selective switches connected to the plurality of splitters, a drop transponder aggregator connected to the plurality of splitters, an add transponder aggregator connected to the plurality of wavelength selective switches, A drop wavelength selective switch, a wavelength converter, and an add wavelength selective switch are sequentially arranged on the path between the output of the drop transponder aggregator and the input of the add transponder aggregator.
  • each of the plurality of splitters equally divides the wavelength division multiplexed light received from the corresponding one of the plurality of input ports to provide a plurality of wavelength selective switches and drop transponders. Output to aggregator.
  • Each of the plurality of wavelength selective switches outputs wavelength light selected from the wavelength division multiplexed light received from each of the plurality of splitters or wavelength light received from the add transponder aggregator to a corresponding one of the plurality of output ports.
  • the wavelength converter converts the wavelength light selected from the wavelength division multiplexed light input from the drop wavelength selective switch into the add transponder aggregator via the add wavelength selective switch. Supply.
  • FIG. 1 is a diagram showing a configuration of an optical communication network according to an embodiment of the present invention.
  • FIG. 1 is a part of an optical communication network (optical network) 100, and three optical communication nodes 50 (ND 1 , ND 2 , ND 3 ) are mutually connected by n communication paths (paths, optical waveguides) P1 to Pn. The structure connected to is shown.
  • a plurality of optical communication nodes 50 corresponding to the network scale are connected to each other by a plurality of optical waveguides.
  • Optical waveguides P1 ⁇ Pn may include, for example optical fiber, or the substrate (Si substrate) on the cladding layer optical waveguide or the like comprising a core of (SiO 2, etc.) in (Si, etc.).
  • light (signals) having a plurality of wavelengths can propagate to each of the optical waveguides P1 to Pn in order to perform wavelength division multiplexing communication (WDM transmission).
  • WDM transmission wavelength division multiplexing communication
  • the present invention relates to the configuration of the optical communication node 50 of FIG. 1, as will be described in detail below.
  • FIG. 2 is a diagram showing a configuration of the optical communication node 50 according to the embodiment of the present invention.
  • the optical communication node 50 of FIG. 2 shows an example including five splitters S0 to S4 and five wavelength selective switches (WSS, hereinafter referred to as “WSS”) W0 to W4 as a basic configuration.
  • WSS wavelength selective switches
  • Each of the four splitters S1 to S4 is connected to one input port IP1 to IP4 corresponding to the order via an optical waveguide, and further connected to five WSSs via the optical waveguide.
  • Each of the four WSSs W1 to W4 is connected to one corresponding output port OP1 to OP4 via an optical waveguide.
  • One wavelength converter WC is arranged in the middle of the optical waveguide 1 connecting the output of one WSS ⁇ W0 and the input of one splitter S0.
  • the outputs of the four splitters S1 to S4 are connected to a drop transponder aggregation switch TPA (Drop) via an optical waveguide.
  • the output of TPA (Drop) is connected to the receiver (receiver) Rx in the transceiver via the optical waveguide 2.
  • the input of the add transponder aggregation switch TPA (Add) is connected to the transmitter (transmitter) Tx in the transceiver via the optical waveguide 3, and the four outputs are connected to the four WSSs W1 to W4 via the optical waveguide. .
  • TPA drop transponder aggregation switch
  • transceiver only one transceiver (Rx, Tx) is shown, but in actuality, the number of output ports of TPA (Drop) and the number of input ports of TPA (Add) (both are 4 in FIG. 2).
  • the two transponder aggregation switches TPA (Drop) and TPA (Add) in FIG. 2 show a configuration example of a multicast switch (MCS) including four splitters and optical switches (Optical space switches).
  • MCS multicast switch
  • the transponder aggregation switch TPA is a C / C for enabling an optical communication channel (optical waveguide) that starts and ends at the node to connect to an arbitrary path at an arbitrary wavelength without colliding in the node.
  • C / D / C means conventional functions of Colorless, Directionless, and Contentionless.
  • a configuration including an add / drop WSS / splitter or a configuration using fixed demultiplexing not assuming C / D / C or the like may be employed.
  • FIG. 3 and 4 shows a configuration excluding the transponder aggregation switches TPA (Drop) and TPA (Add) and the transceivers (Rx, Tx) of FIG.
  • ⁇ (x, y) means the wavelength of the optical communication channel propagating in the optical waveguide (more precisely, light having the wavelength)
  • x is the input port number
  • y is the wavelength. Represents a number.
  • the wavelength ⁇ (1, 1) is input to the input port IP1.
  • the wavelength ⁇ (1, 1) is input to the splitter S1, it is equally branched and input to the five WSSs W0 to W4 and TPA (Drop).
  • the WSS ⁇ W3 passes the wavelength ⁇ (1, 1), and the optical signal ⁇ (1, 1) is transmitted to the output port OP3.
  • Output Since the wavelength ⁇ (1, 1) is blocked in WSSs other than W3, the wavelength ⁇ (1, 1) is not output to output ports other than the output port OP3.
  • TPA (Drop) the wavelength ⁇ (1, 1) from the input port IP1 is blocked by an internal optical switch.
  • the wavelength ⁇ (2, 1) and the wavelength ⁇ (2, 2) are input to the input port IP2.
  • the wavelength ⁇ (2, 1) and the wavelength ⁇ (2, 2) are input to the splitter S2, and then equally branched and input to the five WSSs W0 to W4 and the TPA (Drop).
  • the WSS ⁇ W4 passes the wavelength ⁇ (2, 2), and the wavelength ⁇ (2, 2) is output to the output port OP4.
  • the wavelength ⁇ (2, 2) is blocked in WSSs other than W4, the wavelength ⁇ (2, 2) is not output to output ports other than OP4.
  • the desired path is the receiver Rx. Therefore, in TPA (Drop), in order to pass the wavelength ⁇ (2, 1), the input from the input port IP2 is passed. At this time, since TPA (Drop) has no wavelength selection element, the wavelength ⁇ (2, 2) is also input to the receiver Rx at the same time.
  • TPA (Drop) has no wavelength selection element, the wavelength ⁇ (2, 2) is also input to the receiver Rx at the same time.
  • an optical filter is separately arranged between the TPA (Drop) and the transceiver (receiver Rx), and only a desired wavelength (for example, ⁇ (2, 1) in this case) is provided. It will be passed selectively.
  • the wavelength ⁇ (1, 2) is input to the splitter S1, and then equally branched and input to the five WSSs W0 to W4 and the TPA (Drop).
  • WSS ⁇ W0 passes the wavelength ⁇ (1, 2).
  • the wavelength ⁇ (1, 2) passes through W0 and is then input to the wavelength converter WC via the optical waveguide 1. Note that the wavelength ⁇ (1, 2) is blocked in WSS and TPA (Drop) other than W0.
  • the wavelength ⁇ (1, 2) input to the wavelength converter WC is converted to the wavelength ⁇ (1, 1) by the wavelength conversion function.
  • the converted wavelength ⁇ (1, 1) is described as wavelength ⁇ (1, 2 ⁇ 1).
  • the wavelength ⁇ (1, 2 ⁇ 1) is input to the splitter S0, and then equally branched and input to the five WSSs W0 to W4. Since wavelength collision at the output port OP4, which is a desired output port, has been eliminated by the wavelength conversion, W4 is newly added to the wavelength ⁇ (1, 2 ⁇ 1) in addition to the wavelength ⁇ (2, 2) that has already passed. Can be passed.
  • the wavelength collision said here means that the some optical communication channel which uses the same wavelength overlaps in one optical fiber (optical waveguide) (multiplexing).
  • the operations of the TPA (Drop) and the receiver Rx for the wavelength ⁇ (2, 1) terminating at this node are the same as in the case of FIG. 3 described above.
  • the optical communication node according to the embodiment of the present invention shown in FIG. 2 described above generally has the following characteristics. (1) Using WSS (W0), only the wavelength necessary for wavelength conversion can be extracted and input to the wavelength converter WC, and can also be applied to EON (Elastic Optical Network). (2) By using the splitter (S0), the wavelength after wavelength conversion can be distributed to a plurality of routes. (3) Unnecessary wavelengths after wavelength conversion can be deleted by re-inputting WSS (W1 to W4). (4) One wavelength converter WC can be used simultaneously with input wavelengths from a plurality of routes and output wavelengths to a plurality of routes.
  • “simultaneous use” means that a plurality of input wavelengths from a plurality of different paths can be input to one wavelength converter WC, and a plurality of converted output wavelengths can be distributed to different desired paths, respectively. It means that there is.
  • the discrete wavelength arrangement means that a plurality of wavelengths (wavelength difference) input to the wavelength converter WC are relatively large, that is, a plurality of wavelengths can enter the wavelength interval.
  • two wavelengths input to the splitters S1 and S2 from the input ports IP1 and IP2 are wavelengths that require wavelength conversion. It is assumed that the distance between these two wavelengths (wavelength difference) is relatively large. If the two wavelengths branched from the splitters S1 and S2 and input to the WSS / W0 are left as they are, the wavelength interval is wide as shown in FIG.
  • FIG. 6 shows a configuration example of the optical communication node 50 that includes the wavelength bank (wavelength pool) for supplying the dummy wavelength described with reference to FIG. 5 as one means.
  • one wavelength bank 5 is connected to WSS ⁇ W0 through the optical waveguide 4.
  • the wavelength bank 5 generates a plurality of wavelength lights that can be used in optical communication in order to supply the dummy wavelength to the WSS / W0 in order to avoid the accumulation of the ASE noise described above when the wavelength conversion is performed by the wavelength converter WC. Supply function).
  • the configuration example of FIG. 6 uses the fact that the input from the wavelength converter WC to the WC is unnecessary, assuming that the wavelength conversion is performed once at one node. The structure which connects is shown.
  • FIG. 7 shows a configuration example in which the splitter and the WSS are replaced before and after the configuration example of the optical communication node of FIG.
  • the configuration written as Drop and Add is the same as the configuration of FIG. 2, the configuration of the transponder aggregation switch TPA and the transceiver (Rx, Tx), the configuration including the WSS / splitter for add / drop, or C / D / A configuration using fixed demultiplexing that does not assume C or the like can be employed. This also applies to the configurations of FIGS. 8 to 10 described below.
  • any of the splitters S0 to S4 Is selectively sent to the output port to which it is connected.
  • the light of the wavelength ⁇ (x, y) that needs to be converted is sent from the splitter S0 to the wavelength converter WC for wavelength conversion.
  • the wavelength ⁇ (x, y ′) after wavelength conversion is sent to one of the splitters S1 to S4 after being wavelength-selected by WSS ⁇ W0, and then output to the output port connected thereto.
  • the operation on the drop side for the light of wavelength ⁇ (x, y) terminated at this communication node is basically the same as the operation using TPA (Drop) described with reference to FIGS. Note that the configuration example of FIG. 7 does not correspond to the operation of filling with the dummy wavelength described with reference to FIG.
  • FIG. 8 is a configuration example of an optical communication node when a wavelength bank is adopted in the configuration example of FIG.
  • the wavelength bank 6 is connected to the splitter S0 through the optical waveguide 4. Similar to the wavelength bank 5 in FIG. 6, the wavelength bank 6 is used in optical communication to supply a dummy wavelength to the splitter S0 in order to avoid the above-described accumulation of ASE noise when wavelength conversion is performed by the wavelength converter WC. It has a function of generating (supplying) a plurality of possible wavelengths of light. Furthermore, since the splitter S0 does not have a wavelength selection (arrangement) function, the wavelength bank 6 is configured to have a function of controlling the wavelength arrangement within its own bank.
  • FIG. 9 and 10 show an example of the configuration of an optical communication node when there are two wavelength converters WC and one wavelength bank is included.
  • the wavelength converter WC can include three or more wavelength converters in one optical communication node.
  • FIG. 9 corresponds to a configuration example in which one wavelength converter is newly added via the optical waveguide 7 in the configuration of FIG.
  • two splitters S01 and S02 and two WSS / W01 and W02 connected to the wavelength converters WC1 and WC2 are employed.
  • a splitter 8 is newly provided in the optical waveguide 4 connecting the wavelength banks 5 and W01 and W02.
  • the operation of the optical communication node 50 in FIG. 9 is basically the operation of the optical communication node 50 described with reference to FIGS. 3 and 6 except that wavelength conversion is performed using two wavelength converters. It is the same.
  • FIG. 10 corresponds to a configuration example in which one wavelength converter is newly added via the optical waveguide 7 in the configuration in which the splitter and the WSS of FIG. Along with having two wavelength converters WC1 and WC2, two WSS / W01 and W02 and two WSS / W04 and W05 connected to the wavelength converters WC1 and WC2 are employed. Further, in order to share one wavelength bank 5 with two WSSs W01 and W02, a splitter 8 is newly provided in the optical waveguide 4 connecting the wavelength bank 5 and W04 and W05.
  • the operation of the optical communication node 50 in FIG. 9 is basically the operation of the optical communication node 50 described with reference to FIGS. 3 and 7 except that wavelength conversion is performed using two wavelength converters. It is the same.
  • FIG. 11 is a diagram showing a configuration of an optical communication node including one wavelength converter WC on the TPA side (Add, Drop side) of one embodiment of the present invention.
  • the components including the same are the same as those in FIG. In FIG.
  • WSS ⁇ W5 provided on the output side of the drop transponder aggregation switch TPA (Drop)
  • WSS ⁇ W6 provided on the input side of the add transponder aggregation switch TPA (Add)
  • WSS W5 A wavelength converter WC13 provided in the optical waveguide 12 connecting W6 is newly arranged.
  • ⁇ (x, y) in FIGS. 12 and 13 means the wavelength of light propagating in the optical waveguide (more precisely, light having that wavelength), x represents an input port number, and y represents a wavelength number.
  • ⁇ (1, 1) is input to the input port IP1.
  • the wavelength ⁇ (1, 1) is input to the splitter S1, it is equally branched and input to the four WSSs W1 to W4 and TPA (Drop).
  • the WSS ⁇ W3 passes the wavelength ⁇ (1, 1), and the optical signal ⁇ (1, 1) is transmitted to the output port OP3.
  • Output Since the wavelength ⁇ (1, 1) is blocked in WSSs other than W3, the wavelength ⁇ (1, 1) is not output to output ports other than the output port OP3.
  • the wavelength ⁇ (1, 1) input to the TPA (Drop) passes through the splitter S5, is equally divided, and is input to the optical switches O1, O2, O3, and the wavelength selective switch W5.
  • the optical switches O1, O2, and O3 block the input from the input port IP1, and the wavelength selective switch W5 also blocks the wavelength ⁇ (1, 1).
  • the wavelength ⁇ (1, 1) is blocked in the TPA (Drop).
  • the wavelength ⁇ (2, 1) and the wavelength ⁇ (2, 2) are input to the input port IP2.
  • the wavelength ⁇ (2, 1) and the wavelength ⁇ (2, 2) are input to the splitter S2, and then equally branched and input to the four WSSs W1 to W4 and the TPA (Drop).
  • the WSS ⁇ W4 passes the wavelength ⁇ (2, 2), and the wavelength ⁇ (2, 2) is output to the output port OP4.
  • the wavelength ⁇ (2, 2) is blocked in WSSs other than W4, the wavelength ⁇ (2, 2) is not output to output ports other than OP4. Since the wavelength ⁇ (2, 1) is terminated at this node, the desired path is the receiver Rx.
  • the wavelength ⁇ (2, 1) and the wavelength ⁇ (2, 2) input to the TPA (Drop) pass through the splitter S6 and are equally divided into the optical switches O1, O2, O3 and the wavelength selective switch W5. Is input.
  • the optical switch O1 passes the input from the input port OP2 in order to connect the wavelength ⁇ (2, 2) to the receiver Rx. Since there is no wavelength selection element here, the wavelength ⁇ (2, 2) is also input to the receiver Rx at the same time.
  • the transceiver has a coherent reception function, even when the wavelength ⁇ (2, 1) and the wavelength ⁇ (2, 2) are simultaneously input to the receiver Rx, the desired wavelength ⁇ (2, 1, 2) is received by the local oscillator in the receiver. ) Only can be received.
  • an optical filter is separately disposed between the TPA (Drop) and the receiver Rx, and only a desired wavelength is allowed to pass.
  • the optical switches O2 and O3 block input from the input port IP2.
  • the wavelength selective switch W5 blocks the wavelength ⁇ (2, 1) and the wavelength ⁇ (2, 2).
  • the wavelength ⁇ (1, 2) is inputted to the splitter S1, and then equally branched and inputted to the four WSSs W1 to W4 and the TPA (Drop).
  • the wavelength ⁇ (1, 2) input to the TPA (Drop) is input to the optical switches O1, O2, O3 and WSS ⁇ W5 through the splitter S5 together with the existing wavelength ⁇ (1, 1).
  • wavelength ⁇ (1,2) is blocked.
  • the optical switches O1, O2, and O3 block input from the input port IP1.
  • the wavelength selective switch W5 blocks the wavelength ⁇ (1, 1) and passes only the wavelength ⁇ (1, 2).
  • the wavelength ⁇ (1, 2) is input to the wavelength converter WC (13).
  • the wavelength ⁇ (1, 2) input to the wavelength converter WC (13) is converted to the wavelength ⁇ (1, 1) by the wavelength conversion function.
  • the converted wavelength ⁇ (1, 1) is described as wavelength ⁇ (1, 2-> 1).
  • the wavelength ⁇ (1, 2 ⁇ 1) is input to WSS ⁇ W6, and is switched and output to the splitter S12 corresponding to the desired output port OP4 at W6.
  • the wavelength ⁇ (1, 2 ⁇ 1) is input to WSS ⁇ W4 via the splitter S12. Since wavelength collision at the output port OP4, which is the desired output port, has been eliminated by the wavelength conversion, W4 uses the wavelength ⁇ (1,2 ⁇ 1) in addition to the wavelength ⁇ (2,2) that has already passed. It is possible to pass through.
  • the optical communication node of the present invention can be used as a node of an optical network, for example, in a large-capacity optical transmission system such as WDM transmission.
  • Optical waveguide optical path
  • WSS Wavelength selective switch
  • Optical communication node 100: Optical communication network (optical network)

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Abstract

L'invention concerne une structure de nœud avec laquelle il est possible de partager un convertisseur de longueur d'onde simultanément et de manière flexible dans une pluralité de chemins optiques et de longueurs d'onde dans un réseau de communication optique qui réalise une communication multiplexée par répartition en longueur d'onde optique (transmission WDM). La présente invention concerne un nœud de communication optique (50) placé entre une pluralité de ports d'entrée (IP1-IP4) et une pluralité de ports de sortie (OP1-OP4). Le nœud de communication optique (50) comprend une pluralité de diviseurs (S0-S4), une pluralité de commutateurs sélecteurs de longueur d'onde (W0-W4) connectés à la pluralité de diviseurs et au moins un convertisseur de longueur d'onde (WC) placé sur au moins un chemin (1) reliant la sortie d'au moins un (W0) commutateur parmi la pluralité de commutateurs sélecteurs de longueur d'onde et l'entrée d'au moins un (S0) diviseur parmi la pluralité de diviseurs.
PCT/JP2017/032868 2016-11-01 2017-09-12 Nœud de communication optique WO2018083886A1 (fr)

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JPWO2018181944A1 (ja) * 2017-03-31 2020-02-06 国立研究開発法人産業技術総合研究所 光通信装置及び光通信システム

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US20100092172A1 (en) * 2008-10-10 2010-04-15 Hwan-Seok Chung Apparatus and method for cross-connecting optical path in wavelength division multiplexing system
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JPWO2018181944A1 (ja) * 2017-03-31 2020-02-06 国立研究開発法人産業技術総合研究所 光通信装置及び光通信システム

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