JP3889721B2 - Optical wavelength division multiplexing network equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a full mesh optical wavelength division multiplexing transmission network apparatus that transmits an optical signal wavelength division multiplexed between a plurality of transmission / reception apparatuses.
[0002]
[Prior art]
A method of multiplexing a plurality of optical signals having different wavelengths and transmitting them by a single optical fiber, that is, a wavelength division multiplexing (WDM) transmission method, not only greatly increases transmission capacity but also multiplexes. Addressing is possible in which signal destination information is assigned to each optical signal. In addition, a network composed of optical wavelength routers with periodic input / output-related demultiplexing characteristics and a plurality of transmitting / receiving devices connected in a star shape with optical fibers is wavelength-division multiplexed to each optical fiber. A full mesh optical wavelength division multiplexing transmission network apparatus can be constructed by passing the optical signal (hereinafter referred to as a WDM optical signal).
[0003]
FIG. 1 is a schematic diagram of an optical wavelength division multiplexing transmission network apparatus described in Japanese Patent Application Laid-Open No. 2000-201112. In the figure, reference numerals 101 to 107 denote N transmission / reception apparatuses (1 to N) for transmitting and receiving WDM optical signals (λ1 to λN), 108 denotes an N × N optical wavelength router having N input ports and output ports, OF1. , OF2 is an optical fiber that connects each of the transmission / reception devices 101 to 107 and the optical wavelength router 108. As the optical wavelength router 108, an arrayed waveguide grating (AWG) arraying / demultiplexing circuit (hereinafter referred to as an AWG router) having a demultiplexing characteristic with a periodic input / output relationship is used. .
[0004]
FIG. 2 is a block diagram of the optical wavelength division multiplexing transmission network apparatus shown in FIG. In the figure, reference numerals 210 to 240 denote N transmission / reception devices (1, 2, i, N), and 211 to 241 denote N transmission / reception devices 210 to 240 that can receive optical signals having different wavelengths (λ1 to λN). There are N receiving circuits, 212 to 242 in each of the transmitting and receiving apparatuses 210 to 240, and N transmitting circuits capable of transmitting optical signals of different wavelengths (λ1 to λN), and 213 to 243 are in each transmitting and receiving apparatus 210 to 240. Demultiplexing circuits 214 to 244 for demultiplexing the WDM optical signals input in accordance with the wavelengths, and multiplexing circuits for multiplexing the optical signals from the respective transmission circuits 212 to 242 in the respective transmission / reception devices 210 to 240. Circuit.
[0005]
2, 250 is an N × N AWG router, 261 and 262 are optical fibers that connect the transmission / reception apparatus 210 and the AWG router 250, and 271 and 272 are optical fibers that connect the transmission / reception apparatus 220 and the AWG router 250. , 281, 282 are optical fibers connecting the transmission / reception device 230 and the AWG router 250, and 291 and 292 are optical fibers connecting the transmission / reception device 240 and the AWG router 250.
[0006]
FIG. 3 shows the input / output relationship of the AWG router when the eight transmitting / receiving apparatuses (1) to (8) are connected to the 8 × 8 AWG router in the optical wavelength division multiplexing transmission network apparatus shown in FIG. It is a figure which shows a demultiplexing characteristic and the port connection relationship of eight transmission / reception apparatuses (1)-(8) and an AWG router.
[0007]
The transmission sides of the eight transmission / reception devices (1) to (8) are optically connected in order to the eight input ports 1 to 8 of the AWG router, and the reception side of the eight transmission / reception devices (1) to (8) is the AWG. Optically connected to the eight output ports 1 to 8 of the router in order, and WDM optical signals of eight wavelengths (λ1 to λ8) are multiplexed from the eight transmission / reception devices (1) to (8) to the input port 1 of the AWG router. -8 optical signals are respectively input to the input ports 1 to 8 of the AWG router according to the wavelength recurring rule of the AWG router, as shown in FIG. WDM optical signals that are demultiplexed according to wavelength (λ1 to λ8) and combined with optical signals of eight wavelengths (λ1 to λ8) are output from the output ports 1 to 8 of the AWG router as shown in the figure. Sent to the receiving side of eight transceivers (1) to (8) It is.
[0008]
That is, in the 8 × 8 AWG router, 64 paths can be set independently between the input and output ports with the minimum number of wavelengths of 8, and can be set between the eight transmission / reception devices (1) to (8). Optical signals can be sent independently on all paths. In addition, since a specific wavelength is assigned to each path, if a wavelength corresponding to a predetermined reception circuit is selected on the transmission circuit side of the transmission / reception device, an optical signal of the selected wavelength can be sent to the reception circuit of the target transmission / reception device. Wavelength addressing function can be realized.
[0009]
[Patent Document 1]
JP 2000-201112 A
[0010]
[Problems to be solved by the invention]
However, since the wavelength addressing function is fixed by the number of input / output ports in the AWG router used in the conventional optical wavelength division multiplexing transmission network apparatus described above, the number is increased when the number of transmission / reception apparatuses is increased or decreased. It is necessary to prepare and replace an AWG router having a corresponding number of input / output ports each time, or to reduce the number of transmission / reception devices, it is necessary to use optical signals of different wavelengths in each transmission / reception device.
[0011]
To describe the latter in detail, for example, when a 4 × 4 full mesh network is constructed using an 8 × 8 AWG router, as shown in FIG. A circuit capable of transmitting and receiving optical signals of λ1 to λ4 is required, a circuit capable of transmitting and receiving optical signals of wavelengths λ2 to λ5 is required for the transmission / reception device (2), and an optical signal of wavelengths λ3 to λ6 is required for the transmission / reception device (3). A circuit that can transmit and receive optical signals having wavelengths λ4 to λ7 is required for the transmission / reception device (4).
[0012]
The present invention was created in view of the above circumstances, and the object of the present invention is to eliminate the need for exchanging the optical wavelength router itself with another device even when the number of transmission / reception devices is increased or decreased. It is an object of the present invention to provide an optical wavelength division multiplex transmission network apparatus that can use optical signals of the same type of wavelength.
[0013]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the present invention provides M units (M is 2 or more and N or less) that transmits and receives wavelength division multiplexed optical signals to and from an optical wavelength router having N (N is a plurality) input ports and output ports. A full mesh optical wavelength division multiplex transmission network apparatus configured by optically connecting (integer) transmission / reception apparatuses, wherein the transmission / reception apparatuses are capable of individually transmitting M types of optical signals having different wavelengths. A transmission circuit; a multiplexing circuit for multiplexing M types of optical signals having different wavelengths input from the transmission circuit; and a demultiplexing circuit for demultiplexing M wavelength multiplexed optical signals input from the optical wavelength router according to wavelength. And M receiving circuits capable of individually receiving M types of optical signals having different wavelengths input from the branching circuit, and the optical wavelength router is arranged corresponding to the input port and is M wavelength multiplexed light. At least M to demultiplex signals by wavelength A full-mesh is composed of a demultiplexing unit, at least M multiplexing units arranged corresponding to the output ports and multiplexing M types of optical signals having different wavelengths, and M transmission / reception devices optically connected to the input / output ports. And an optical waveguide having an optical waveguide having a square of M that connects the output side of the demultiplexing unit and the input side of the multiplexing unit so as to be connected.
[0014]
According to this optical wavelength division multiplexing transmission network device, even when the number of transmission / reception devices increases / decreases, a full-mesh network can be basically constructed simply by changing the connection form of the optical waveguide section of the optical wavelength router. At this time, it is not necessary to replace the optical wavelength router itself with another one, and each transmitter / receiver uses an optical signal of the same type of wavelength (using an optical signal having the same wavelength type as the number of transmitter / receivers). It can be carried out.
[0015]
The above object and other objects, structural features, and operational effects of the present invention will become apparent from the following description and the accompanying drawings.
[0016]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 4 is a configuration diagram of a two-node optical wavelength division multiplexing network device to which the present invention is applied. In the figure, reference numerals 310 and 320 denote two transmission / reception apparatuses that transmit and receive two-wavelength multiplexed WDM optical signals, 400 denotes an optical wavelength router having four input ports IP1 to IP4 and output ports OP1 to OP4, 511, 512, and 521. , 522 are optical fibers that optically connect the two transmission / reception devices 310 and 320 and the optical wavelength router 400.
[0017]
Each of the transmission / reception devices 310 and 320 has two transmission circuits 311 and 321 capable of individually transmitting two types of optical signals (λ1 and λ2) having different wavelengths, and two wavelengths input from the transmission circuits 311 and 321 are different. Multiplexing circuits 312 and 322 for multiplexing various types of optical signals (λ1, λ2), and demultiplexing for demultiplexing the two-wavelength multiplexed WDM optical signal input from the optical wavelength router 400 by wavelength (λ1, λ2) Circuits 313 and 323 and two receiving circuits 314 and 324 capable of individually receiving two types of optical signals (λ1 and λ2) having different wavelengths input from the demultiplexing circuits 313 and 323 are provided.
[0018]
The optical wavelength router 400 includes four demultiplexing units 411 to 414 whose input sides are connected to the input ports IP1 to IP4 and four multiplexing units 421 whose output sides are connected to the output ports OP1 to OP4. 421, and an optical waveguide unit 430 that connects the output side of the four demultiplexing units 411 to 414 and the input side of the four multiplexing units 421 to 424 as described later.
[0019]
The output side of the transmission / reception device 310 is connected to the input port IP1 of the optical wavelength router 400 via the optical fiber 511, and the input side is connected to the output port OP1 of the optical wavelength router 400 via the optical fiber 512, Further, the output side of the transmission / reception device 320 is connected to the input port IP2 of the optical wavelength router 400 via the optical fiber 521, and the input side is connected to the output port OP2 of the optical wavelength router 400 via the optical fiber 522. Yes.
[0020]
Since the optical wavelength router 400 is capable of connecting up to four transmission / reception devices, the demultiplexing units 411 to 414 and the multiplexing units 421 to 421 provided in the optical wavelength router 400 are used. The one that can multiplex or demultiplex four types of optical signals (λ1 to λ4) is used. Also, the multiplexing circuits 312 and 322 and the demultiplexing circuits 313 and 323 provided in each of the transmission / reception devices 310 and 320 are capable of multiplexing or demultiplexing four types of optical signals (λ1 to λ4). Yes.
[0021]
The optical waveguide unit 430 of the optical wavelength router 400 has four optical waveguides 430a because there are two transmission / reception devices. The four optical waveguides 430a have a demultiplexing characteristic in which the output sides of the two demultiplexing portions 411 and 412 and the input sides of the two demultiplexing portions 421 and 422 have a periodic input / output relationship. As a result, the optical wavelength router 400 distributes the two-wavelength multiplexed WDM optical signals input to the input ports IP1 and IP2 to the different output ports OP1 and OP2 according to the wavelengths λ1 and λ2, respectively. I am doing. Incidentally, the optical waveguide 430 can be composed of four optical fibers, an optical fiber sheet having four optical fiber core wires, a 2 × 2 optical switch, and the like.
[0022]
In the two-node network apparatus shown in FIG. 4, the two-wavelength multiplexed WDM optical signal input from the transmission / reception apparatus 310 to the input port IP1 is demultiplexed by wavelength (λ1, λ2) by the demultiplexing unit 411. The two-wavelength multiplexed WDM optical signal input from the transmitting / receiving device 320 to the input port IP2 is demultiplexed by wavelength demultiplexer 412 (λ1, λ2).
[0023]
In addition, two types of optical signals (λ1, λ2) having different wavelengths input from the optical waveguide unit 430 to the multiplexing unit 421 are combined by the combining unit 421 and sent from the output port OP1 to the transmission / reception device 310 to be optically transmitted. Two types of optical signals (λ1, λ2) having different wavelengths input from the wave unit 430 to the multiplexing unit 422 are combined by the multiplexing unit 422 and sent to the transmission / reception device 320 from the output port OP2.
[0024]
FIG. 5 shows a demultiplexing characteristic of a periodic input / output relationship of the optical wavelength router 400 when the two transmission / reception apparatuses 310 and 320 are connected to the optical wavelength router 400 in the two-node network apparatus shown in FIG. 3 is a diagram showing the port connection relationship between the two transmission / reception devices 310 and 320 and the optical wavelength router 400. FIG. As can be seen from the figure, four wavelength paths are independently formed between the two transmission / reception devices 310 and 320, and the two transmission / reception devices 310 and 320 are fully meshed by the optical wavelength router 400. ing.
[0025]
FIG. 6 is a configuration diagram of a three-node optical wavelength division multiplexing network device to which the present invention is applied. In this network device, one transmission / reception device 330 is added to the two-node network device shown in FIG. 4 and optically connected to the optical wavelength router 400, and an optical signal having a wavelength λ3 is sent to the transmission / reception devices 310 and 320. It is constructed by adding one transmission circuit and one reception circuit capable of transmission / reception.
[0026]
Each of the transmission / reception devices 310, 320, and 330 is input from three transmission circuits 311, 321, and 331 that can individually transmit three types of optical signals (λ1 to λ3) having different wavelengths, and the transmission circuits 311, 321, and 331. The three-wavelength multiplexed WDM optical signals inputted from the optical wavelength router 400 and the multiplexing circuits 312, 322, and 332 for multiplexing the three types of optical signals (λ1 to λ3) having different wavelengths are classified by wavelength (λ1 to λ1). three demultiplexing circuits 313, 323, 333 for demultiplexing to λ3) and three types of optical signals (λ1 to λ3) having different wavelengths input from the demultiplexing circuits 313, 323, 333 can be individually received. Receiving circuits 314, 324, 334.
[0027]
The output side of the transmission / reception device 310 is connected to the input port IP1 of the optical wavelength router 400 via the optical fiber 511, and the input side is connected to the output port OP1 of the optical wavelength router 400 via the optical fiber 512, Further, the output side of the transmission / reception device 320 is connected to the input port IP2 of the optical wavelength router 400 via the optical fiber 521, and the input side is connected to the output port OP2 of the optical wavelength router 400 via the optical fiber 522. Further, the output side of the transmission / reception device 330 is connected to the input port IP3 of the optical wavelength router 400 via the optical fiber 531, and the input side is connected to the output port OP3 of the optical wavelength router 400 via the optical fiber 532 Has been.
[0028]
The optical waveguide unit 430 of the optical wavelength router 400 has nine optical waveguides 430a because there are three transmission / reception devices. The nine optical waveguides 430a have demultiplexing characteristics in which the output sides of the three demultiplexing portions 411, 412, and 413 and the input sides of the three demultiplexing portions 421, 422, and 423 are periodically input / output. As a result, the optical wavelength router 400 receives the three-wavelength multiplexed WDM optical signals input to the input ports IP1 to IP3 as light and outputs different output ports OP1 to OP1 depending on the wavelengths λ1 to λ3. It works to distribute to 0P3. Incidentally, the optical waveguide 430 can be composed of nine optical fibers, an optical fiber sheet having nine optical fiber core wires, a 3 × 3 optical switch, and the like.
[0029]
In the three-node network apparatus shown in FIG. 6, the three-wavelength multiplexed WDM optical signal input from the transmission / reception apparatus 310 to the input port IP1 is demultiplexed by wavelength (λ1 to λ3) by the demultiplexing unit 411. The three-wavelength multiplexed WDM optical signal input from the transmission / reception device 320 to the input port IP2 is demultiplexed into wavelengths (λ1 to λ3) by the demultiplexing unit 412 and the three wavelengths input from the transmission / reception device 330 to the input port IP3. The multiplexed WDM optical signal is demultiplexed by wavelength (λ1 to λ3) by the demultiplexing unit 413.
[0030]
In addition, three types of optical signals (λ1 to λ3) having different wavelengths inputted from the optical waveguide unit 430 to the multiplexing unit 421 are multiplexed by the multiplexing unit 421 and sent from the output port OP1 to the transmission / reception device 310 to be optically transmitted. Three types of optical signals (λ1 to λ3) having different wavelengths input from the wave unit 430 to the multiplexing unit 422 are multiplexed by the multiplexing unit 422 and sent from the output port OP2 to the transmission / reception device 320, and the optical waveguide unit 430 The three types of optical signals (λ1 to λ3) having different wavelengths input to the multiplexing unit 423 are multiplexed by the multiplexing unit 423 and sent from the output port OP3 to the transmission / reception device 330.
[0031]
FIG. 7 shows the periodic input / output relationship of the optical wavelength router 400 when the three transmitting / receiving apparatuses 310, 320, and 330 are connected to the optical wavelength router 400 in the three-node network apparatus shown in FIG. It is a figure which shows a wave characteristic and the port connection relationship of the three transmission / reception apparatuses 310,320,330, and the optical wavelength router 400. FIG. As can be seen from the figure, nine wavelength paths are independently formed between the three transmission / reception devices 310, 320, and 330, and the three transmission / reception devices 310, 320, and 330 are separated by the optical wavelength router 400. Full mesh connection.
[0032]
FIG. 8 is a configuration diagram of a four-node optical wavelength division multiplexing network device to which the present invention is applied. In this network device, one transmission / reception device 340 is added to the three-node network device shown in FIG. 6 and optically connected to the optical wavelength router 400, and light of wavelength λ4 is connected to the transmission / reception devices 310, 320, and 330. It is constructed by adding one transmission circuit and one reception circuit capable of transmitting and receiving signals.
[0033]
Each of the transmission / reception devices 310, 320, 330, and 340 includes four transmission circuits 311, 321, 331, and 341 and transmission circuits 311 and 321 that can individually transmit four types of optical signals (λ1 to λ4) having different wavelengths. , 331, 341, four types of optical signals (λ 1 to λ 4) having different wavelengths are multiplexed, and three-wavelength multiplexing WDM received from the optical wavelength router 400 is combined. Demultiplexing circuits 313, 323, 333, and 343 for demultiplexing optical signals by wavelength (λ1 to λ4) and four types of optical signals (λ1) having different wavelengths input from the demultiplexing circuits 313, 323, 333, and 343 ˜λ4) are provided with four receiving circuits 314, 324, 334, and 344 that can individually receive them.
[0034]
The output side of the transmission / reception device 310 is connected to the input port IP1 of the optical wavelength router 400 via the optical fiber 511, and the input side is connected to the output port OP1 of the optical wavelength router 400 via the optical fiber 512, Further, the output side of the transmission / reception device 320 is connected to the input port IP2 of the optical wavelength router 400 via the optical fiber 521, and the input side is connected to the output port OP2 of the optical wavelength router 400 via the optical fiber 522. Further, the output side of the transmission / reception device 330 is connected to the input port IP3 of the optical wavelength router 400 via the optical fiber 531, and the input side is connected to the output port OP3 of the optical wavelength router 400 via the optical fiber 532 Furthermore, the output side of the transmission / reception device 340 is input to the optical wavelength router 400 via the optical fiber 541. It is connected to over preparative IP4, and the input side is connected to the output port OP4 of the optical wavelength router 400 via the optical fiber 542.
[0035]
The optical waveguide section 430 of the optical wavelength router 400 has 16 optical waveguides 430a because there are four transmission / reception devices. The 16 optical waveguides 430a have a periodic input / output relationship between the output side of the four demultiplexing units 411, 412, 413, and 414 and the input side of the four multiplexing units 421, 422, 423, and 424. The optical wavelength router 400 is connected so as to have a demultiplexing characteristic, whereby the WDM optical signal input to each of the input ports IP1 to IP4 is output as different output ports OP1 to OP1 depending on the wavelengths λ1 to λ4. It works to distribute to 0P4. Incidentally, the optical waveguide 430 can be composed of 16 optical fibers, an optical fiber sheet having 16 optical fiber core wires, a 4 × 4 optical switch, and the like.
[0036]
In the four-node network apparatus shown in FIG. 8, the four-wavelength multiplexed WDM optical signal input from the transmission / reception apparatus 310 to the input port IP1 is demultiplexed by wavelength (λ1 to λ4) by the demultiplexing unit 411. The four-wavelength multiplexed WDM optical signal input from the transmission / reception device 320 to the input port IP2 is demultiplexed into wavelengths (λ1 to λ4) by the demultiplexing unit 412 and is input from the transmission / reception device 330 to the input port IP3. The multiplexed WDM optical signal is demultiplexed by wavelength (λ1 to λ4) by the demultiplexing unit 413, and the 4-wavelength multiplexed WDM optical signal input from the transmission / reception device 340 to the input port IP4 is demultiplexed by wavelength ( Demultiplexed to λ1 to λ4).
[0037]
In addition, four types of optical signals (λ1 to λ4) having different wavelengths input from the optical waveguide unit 430 to the multiplexing unit 421 are combined by the multiplexing unit 421 and sent from the output port OP1 to the transmission / reception device 310. Four types of optical signals (λ1 to λ4) having different wavelengths input from the wave unit 430 to the multiplexing unit 422 are multiplexed by the multiplexing unit 422 and sent from the output port OP2 to the transmission / reception device 320, and the optical waveguide unit 430 The four types of optical signals (λ1 to λ4) having different wavelengths input from the optical fiber to the multiplexing unit 423 are multiplexed by the multiplexing unit 423 and sent from the output port OP3 to the transmission / reception device 330, and multiplexed from the optical waveguide unit 440. Four types of optical signals (λ1 to λ4) having different wavelengths input to the unit 424 are combined by the combining unit 424 and sent to the transmission / reception device 340 from the output port OP4.
[0038]
FIG. 9 shows the periodic input / output relationship of the optical wavelength router 400 when the four transmission / reception devices 310, 320, 330, and 340 are connected to the optical wavelength router 400 in the four-node network device shown in FIG. 8. FIG. 6 is a diagram showing the demultiplexing characteristics and port connection relationships of four transmission / reception devices 310, 320, 330, and 340 and the optical wavelength router 400. As can be seen from the figure, 16 wavelength paths are independently formed between the four transmission / reception devices 310, 320, 330, and 340, and the four transmission / reception devices 310, 320, 330, and 340 are optical. A full mesh connection is made by the wavelength router 400.
[0039]
Thus, according to the optical wavelength division multiplexing transmission network apparatus described above, the number of transmitting / receiving apparatuses is increased from 2 to 3, 3 to 4, 2 to 4, or from 4 to 3, 3 to 2, 4 to 2 Even if it decreases, a full mesh network can be constructed simply by changing the connection configuration of the optical waveguide of the optical wavelength router, so it is necessary to replace the optical wavelength router with another when increasing or decreasing the number of transmission / reception devices In addition, communication can be performed using optical signals of the same type of wavelength (using optical signals having the same wavelength type as the number of transmission / reception devices) in each transmission / reception device. That is, it is possible to provide a full-mesh type optical wavelength division multiplex transmission network apparatus that is extremely flexible with respect to increase / decrease in the number of transmission / reception apparatuses and is advantageous in terms of design and maintenance.
[0040]
4, 6, and 8, the demultiplexing units 411 to 414 and the multiplexing units 421 to 424 of the optical wavelength router 400 are configured by individual components, and four units are provided. These demultiplexing units or multiplexing units may be integrated on one substrate.
[0041]
In the case of the two-node network apparatus shown in FIG. 4, the two input ports IP3 and IP4 and the demultiplexing units 413 and 414 and the two output ports OP3 and OP4 and the multiplexing unit 423 of the optical wavelength router 400 are used. Since 424 is not used, a device in which these are excluded in advance may be used as the optical wavelength router 400. In the case of the three-node network device shown in FIG. 6, one input port of the optical wavelength router 400 is used. Since the IP4 and demultiplexing unit 414, one output port OP4, and the multiplexing unit 424 are not used, the optical wavelength router 400 may be used by excluding them.
[0042]
In this case, when constructing a three-node network device by increasing the number of transmission / reception devices from 2 to 3, one input port IP3 and demultiplexing unit 413, one output port OP3 and multiplexing unit 423 are provided. Is added to the optical wavelength router 400, and when the number of transmission / reception devices is increased from 3 to 4 to construct a 4-node network device, one input port IP4 and demultiplexing unit 414 and one output are provided. It is preferable to add the port OP4 and the multiplexing unit 424 to the optical wavelength router 400. Further, when constructing a four-node network device by increasing the number of transmission / reception devices from 2 to 4, two input ports IP3, IP4 and The demultiplexing units 413 and 414, the two output ports OP3 and 0P4, and the multiplexing units 423 and 424 may be added to the optical wavelength router 400.
[0043]
Of course, when the number of transmission / reception devices is reduced from 4 to 3, from 3 to 2, or from 4 to 2, unnecessary input / output ports, demultiplexing units, and multiplexing units are excluded. This makes it possible to construct a network device with the desired number of nodes.
[0044]
The case where the number of transmission / reception devices is increased from 2 to 4 (decrease from 4 to 2) has been described with reference to FIGS. 4 to 9, but an optical wavelength router capable of connecting 5 or more transmission / reception devices can be connected. In this case, the number of transmission / reception devices can be increased from 2 to 5 or more (decrease from 5 or more to 2). In this case as well, the same effect as described above can be obtained.
[0045]
【The invention's effect】
As described above in detail, according to the present invention, it is possible to provide a full-mesh type optical wavelength division multiplexing transmission network apparatus that is extremely flexible with respect to increase / decrease in the number of transmission / reception apparatuses and is advantageous in terms of design and maintenance. .
[Brief description of the drawings]
FIG. 1 is a schematic diagram of a conventional optical wavelength division multiplexing transmission network apparatus.
2 is a block diagram of the optical wavelength division multiplex transmission network apparatus shown in FIG.
FIG. 3 shows the input / output relationship of the AWG router when the eight transmitter / receivers (1) to (8) are connected to the 8 × 8 AWG router in the optical wavelength division multiplexing transmission network apparatus shown in FIG. The figure which shows a demultiplexing characteristic and the port connection relation of eight transmission / reception apparatuses (1)-(8) and an AWG router.
FIG. 4 is a configuration diagram of a two-node optical wavelength division multiplexing network device to which the present invention is applied.
FIG. 5 is a schematic diagram of a demultiplexing characteristic of a periodic input / output relationship of the optical wavelength router 400 when the two transmitting / receiving apparatuses 310 and 320 are connected to the optical wavelength router 400 in the two-node network apparatus shown in FIG. 4; And the port connection relationship between the two transmitter / receivers 310 and 320 and the optical wavelength router 400
FIG. 6 is a configuration diagram of a three-node optical wavelength division multiplexing network device to which the present invention is applied.
7 is a diagram showing the periodic input / output relationship of the optical wavelength router 400 when the three transmitting / receiving apparatuses 310, 320, and 330 are connected to the optical wavelength router 400 in the three-node network apparatus shown in FIG. The figure which shows a wave characteristic and the port connection relationship of the three transmission / reception apparatuses 310,320,330 and the optical wavelength router 400
FIG. 8 is a configuration diagram of a four-node optical wavelength division multiplexing network device to which the present invention is applied.
9 is a periodic input / output relationship of the optical wavelength router 400 when four transmission / reception devices 310, 320, 330, and 340 are connected to the optical wavelength router 400 in the four-node network apparatus shown in FIG. FIG. 4 is a diagram showing the demultiplexing characteristics of the four and the port connection relationship between the four transmission / reception devices 310, 320, 330, and 340 and the optical wavelength router 400
[Explanation of symbols]
310, 320, 330, 340 ... transmitting / receiving device, 311, 321, 331, 341 ... transmitting circuit, 312, 322, 332, 342 ... combining circuit, 313, 323, 333, 343 ... demultiplexing circuit, 314, 324 334, 344 ... receiving circuit, 400 ... optical wavelength router, 411-414 ... demultiplexing unit, 421-424 ... multiplexing unit, 430 ... optical waveguide unit, 430a ... optical waveguide, 511, 512, 521, 522, 531 532, 541, 542... Optical fiber.

Claims (4)

An optical wavelength router having N (N is a plurality) input ports and output ports is configured by optically connecting M (M is an integer from 2 to N) transmission / reception devices for transmitting and receiving wavelength division multiplexed optical signals. A full mesh optical wavelength division multiplexing transmission network device,
The transmission / reception apparatus includes: M transmission circuits capable of individually transmitting M types of optical signals having different wavelengths; a multiplexing circuit that combines M types of optical signals having different wavelengths input from the transmission circuit; A demultiplexing circuit for demultiplexing the M-wavelength multiplexed optical signal input from the wavelength router according to wavelength; and M receiving circuits capable of individually receiving M types of optical signals having different wavelengths input from the demultiplexing circuit; With
The optical wavelength router includes at least M demultiplexing units that are arranged corresponding to input ports and demultiplex M-wavelength multiplexed optical signals according to wavelengths, and M types of light that are arranged corresponding to output ports and have different wavelengths. The output side of the demultiplexing unit and the input side of the multiplexing unit are connected so that at least M multiplexing units for multiplexing the signals and M transmission / reception devices optically connected to the input / output ports are connected in a full mesh. An optical waveguide having an optical waveguide of M square to be connected,
An optical wavelength division multiplexing transmission network apparatus characterized by the above. The optical waveguide part of the optical wavelength router is composed of an optical fiber having a square of M.
The optical wavelength division multiplex transmission network apparatus according to claim 1. The optical waveguide unit of the optical wavelength router is composed of an optical fiber sheet having an optical fiber core wire with a square of M.
The optical wavelength division multiplex transmission network apparatus according to claim 1. The optical waveguide unit of the optical wavelength router is composed of M × M optical switches.
The optical wavelength division multiplex transmission network apparatus according to claim 1.

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