JP2006217079A - Wavelength multiplex optical signal transfer device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a wavelength multiplex optical signal transfer device capable of transmitting a wavelength multiplex optical signal to an arbitrary destination by fast switching under simple control with simple constitution without using a low-speed optical matrix switch nor an expensive variable wavelength light source. <P>SOLUTION: The wavelength multiplex optical signal transfer device comprises a plurality of optical gates 14-1 etc., which each input a wavelength multiplex light and output it after adjusting its transmission quantity, a 1st array waveguide diffraction grating AWG15 which inputs wavelength multiplex lights whose transmission quantities have been adjusted to designated input ports respectively, demultiplex the multiplex lights by wavelengths, and output lights of designated wavelengths to designated output ports corresponding to the input ports and wavelengths, an optical modulator 16-1 which outputs optical signals generated by imposing intensity modulation corresponding to transmitted information on lights of the respective wavelengths that the 1st AWG15 outputs to the plurality of output ports, etc., and a 2nd AWG17 which inputs optical signals of respective wavelengths to independent input ports, multiplexes them, and outputs multiplexed lights to designated output ports corresponding to the input ports and wavelengths. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a wavelength division multiplexing optical signal transfer apparatus that transfers wavelength division multiplexed optical signals between information processing apparatuses.

  The volume of data exchanged between various information processing apparatuses has increased rapidly. In long-distance data transmission, optical fiber communication technology has already been applied in response to this increase in capacity. In particular, the introduction of wavelength division multiplexing technology has led to a dramatic increase in capacity. In the future, even in short-distance data transmission, the application of optical fiber communication technology will expand in response to the increase in capacity, and wavelength division multiplexing technology will be introduced especially when data transmission capacity exceeding 10-40 Gb / s is required. It is thought that it will be done. In addition, when an optical signal is frequently used for data transmission, a technique for performing various kinds of control necessary in the middle of the transmission path without once converting the optical signal into an electrical signal becomes important. In particular, since optical signals having different wavelengths can be spatially separated by spectroscopic means, it is considered that a technique for utilizing wavelengths as destination information will spread.

  In the technology of utilizing the wavelength as the destination information, a data transfer control method in units of one wavelength has been mainly studied. In this case, there are a method for making the wavelength variable on the transmission side and a method for making the wavelength variable on the reception side.

  As a method of variably setting the wavelength on the transmission side, conventionally, a plurality of variable wavelength light sources, an optical signal processor for performing signal processing on light emitted from the variable wavelength light source, and a plurality of input waveguides on the optical waveguide substrate , A slab waveguide, an arrayed waveguide diffraction grating, and a plurality of output waveguides, and a plurality of input signal lights of a plurality of wavelengths emitted from the plurality of variable wavelength light sources corresponding to the respective wavelengths. An arrayed waveguide diffraction grating type optical multiplexer / demultiplexer that outputs from each output waveguide, and a plurality of light receiving elements that detect optical signals output from the arrayed waveguide grating optical multiplexer / demultiplexer A lightwave address system is known (for example, see Patent Document 1).

  FIG. 12 is a configuration diagram of a lightwave address system described in Patent Document 1. In FIG.

  This lightwave address system is an example in which an optical signal is transferred from four variable wavelength semiconductor laser light sources 71-1 to 71-4 to four light receiving elements 74-1 to 74-4. In this lightwave address system, four variable wavelength semiconductor laser light sources 71-1 to 71-4, four optical signal processors 72-1 to 72-4, and polarization compensators 80-1 to 80 for matching the polarization planes. -4, Array Waveguide Grating (AWG) 73 having wavelength revolving characteristics, and four light receiving elements 74-1 to 74-4.

  In the variable wavelength semiconductor laser light sources 71-1 to 71-4 shown in FIG. 12, for example, by changing the amount of current injected into the part constituting the resonator mirror, the output light wavelengths are changed to λ1, λ2, λ3, and λ4. Set to either. In the four optical signal processors 72-1 to 72-4, the electrical signals from the four independent data transmitters and the continuous output from the four variable wavelength semiconductor laser light sources 71-1 to 71-4 are output. Light is input, intensity modulation corresponding to an electric signal is performed on the input continuous light, and the result is output as an optical signal. The arrayed waveguide diffraction grating 73 includes four input waveguides 75, a slab waveguide 76, an arrayed waveguide diffraction grating 77, a slab waveguide 78, and four output waveguides 79. The optical signal that has passed through one input waveguide 75 is spread by diffraction in the slab waveguide 76 and then input to the arrayed waveguide diffraction grating 77. In the arrayed waveguide diffraction grating 77, a constant optical phase difference is given between optical signals passing through adjacent waveguides. The optical signal that has passed through the arrayed waveguide diffraction grating 77 is collected at one entrance of the output waveguide 79 by the slab waveguide 78. Which of the output waveguides 79 is focused on is determined by the optical phase difference between adjacent waveguides given when passing through the arrayed waveguide grating 77. Since this optical phase difference depends on the wavelength, the condensing position also depends on the wavelength. Therefore, optical signals of different wavelengths are guided to different output waveguides 79 and propagated to the receiving device connected thereto. FIG. 13 shows the relationship between the wavelengths output by the optical signal processors 72-1 to 72-4 and the wavelengths received by the light receiving elements 74-1 to 74-4.

  Further, as a method of variably selecting a wavelength on the receiving side, conventionally, an optical signal multiplexed with N wavelengths is input, and a 1 × m optical switch, an arrayed waveguide diffraction grating, and an n × 1 optical switch are configured. A tunable optical filter is known (for example, refer to Patent Document 2).

  In this tunable optical filter, it is said that one wavelength can be selected from N = m × n wavelengths using a small number of optical switches and an arrayed waveguide diffraction grating.

  Also, conventionally, an N × N first arrayed waveguide diffraction grating in which an optical signal multiplexed with N wavelengths is input and m-branches are connected, and each output from the brancher is connected to an input port. One or a plurality of second arrayed waveguide diffraction gratings, each of which receives n outputs from the output of the arrayed waveguide diffraction grating through an optical gate and obtains outputs of each m, and the second array There is known an optical frequency variable filter composed of a combiner that combines m outputs of a waveguide diffraction grating through an optical gate (see, for example, Patent Document 3).

  In this optical frequency variable filter, it is said that one wavelength can be selected from N = m × n wavelengths at each of the m output ports by using a small number of optical gates and an arrayed waveguide diffraction grating. ing.

  As described above, in the technology that utilizes the wavelength as the destination information, the data transfer control method in units of one wavelength has been mainly studied. However, for large-capacity data that greatly exceeds 10 to 40 Gb / s in the future. There seems to be a need for batch transfer control. In order to cope with such a request, conventionally, an optical path cross-connect device that performs transfer control in units of wavelength groups is known (see, for example, Patent Document 4).

  In this apparatus, a wavelength multiplexed optical signal of each wavelength multiplexing transmission link is input, and a plurality of wavelength group optical signals that are separated into N (N is an integer greater than or equal to N) wavelength groups (G is an integer greater than or equal to 2). A demultiplexer, a routing processing unit that performs routing processing in units of each wavelength group optical signal, and a plurality of multiplexers that combine each wavelength multiplexing transmission link that outputs each wavelength group optical signal routed by the routing processing unit It has become with. The routing processing means is composed of an optical matrix switch and a wavelength converter, and selection of the fiber for outputting the wavelength group optical signal is performed by path control of the optical matrix switch.

  In the optical path cross-connect device according to the present invention, the routing processing capability can be greatly increased by performing the routing process in units of wavelength group paths obtained by grouping a plurality of wavelength paths. It is said that the transmission cost can be greatly reduced.

  As described above, when a wavelength group is used as destination information and data transfer is controlled in units of wavelength groups, a method for enabling the wavelength group to be variably set on the transmission side, and a wavelength group on the reception side. There is a method that allows variable selection.

  As a method of variably selecting a wavelength group on the receiving side, conventionally, an optical wavelength demultiplexer that outputs to a different port for each wavelength group, and an optical gate connected to each of the output ports of the optical wavelength demultiplexer, There is known a wavelength selector composed of an arrayed waveguide diffraction grating in which the output of the optical gate is connected to an input port (see, for example, Patent Document 5).

  In this optical wavelength selector, an optical group consisting of m pieces of light having different wavelengths can be easily selected by turning on / off one optical gate switch for each optical group. Since the m light beams constituting the light group are output from different ports, the light group can be received as it is by an optical receiver without passing through an optical filter or the like. It is possible to simplify the structure of the network.

  Conventionally, arrayed-waveguide diffraction gratings having wavelength circulation properties are known (see, for example, Non-Patent Document 1 and Non-Patent Document 2). When such an arrayed waveguide diffraction grating is used, setting of which receiving device among a plurality of receiving devices an optical signal generated by each optical modulator can be set by the wavelength. The destination of the optical signal can be switched by changing the output wavelength of the wavelength tunable light source.

In the case described in Non-Patent Document 2, it is possible to change the output wavelength by changing the amount of current injected into the part constituting the resonator mirror of the semiconductor laser. In this case, although the time required for changing the output wavelength is reported to be about 1 ns at the shortest, it greatly depends on the control technology for stabilizing the wavelength and intensity of the output light. If the change in the amount of current injection required to change the output wavelength is large, the optical loss at the resonator mirror and the element temperature of the semiconductor laser will be affected. Therefore, stabilization control of the wavelength and intensity of the output light may be necessary. is there.
JP-A-6-2322843 (page 3-5, FIGS. 1-7) JP-A-8-227059 (page 1-5, FIGS. 1-15) JP-A-10-224296 (page 1-7, FIGS. 1-23) JP 2002-262319 A (page 5-7, FIG. 1-13) JP-A-10-177115 (page 1-5, FIGS. 1-2) Takahashi et al., “Journal of Lightwave Technology”, Vol. 13, 447-455, 1995 Jayaraman et al., "IJ Journal of Quantum Electronics", Vol. 29, pages 1824-1834, 1993

  However, in the wavelength division multiplexing optical signal transfer system based on the technique described in Patent Document 1, in order to transfer the wavelength division multiplexed optical signal to different destination receivers, it is necessary to simultaneously change the output light wavelengths of the wavelength variable light source. . As described in the background art above, since the technology for switching the output wavelength of the wavelength tunable light source at high speed needs to add complicated control, there is a problem that the cost increases.

  The tunable optical filter described in Patent Document 2 is configured to select and output one wavelength from N wavelengths at one output port, and wavelength multiplexing is performed for a port selected from a plurality of output ports. It is not a device that sends out optical signals.

  In addition, the optical frequency variable filter described in Patent Document 3 is configured to select and output one wavelength from N wavelengths at a plurality of output ports, and wavelength multiplexing is performed on a port selected from the plurality of output ports. It is not a device that sends out optical signals.

  In the optical path cross-connect device described in Patent Document 4, the selection of the fiber for outputting the wavelength group optical signal is performed by the path control of the optical matrix switch, but the high-speed path control is performed by the optical matrix switch having a large number of ports. There is a problem that it is difficult to do.

  In addition, the optical wavelength filter described in Patent Document 5 is configured to select a wavelength group optical signal from a wavelength multiplexed optical signal and output it individually from a plurality of ports, and to a port selected from a plurality of output ports. On the other hand, it is not a device that sends out a wavelength multiplexed optical signal.

  The present invention has been made to solve the above-mentioned problems. The first object of the present invention is to provide wavelength-division multiplexed light with a simple configuration and simple control without using a low-speed optical matrix switch or an expensive wavelength variable light source. An object of the present invention is to provide a wavelength division multiplexing optical signal transfer apparatus capable of switching and transmitting a signal to an arbitrary destination at high speed.

  A second object of the present invention is to provide wavelength multiplexing with a simple configuration and simple control for multi-wavelength continuous light input from a single fiber without using a low-speed optical matrix switch or an expensive wavelength variable light source. An object of the present invention is to provide a wavelength division multiplexing optical signal transfer apparatus capable of switching and transmitting an optical signal to an arbitrary destination at high speed.

  A third object of the present invention is to provide wavelength multiplexing capable of load distribution to a plurality of output ports with a simple configuration and simple control without using a low-speed optical matrix switch or an expensive wavelength variable light source. An object is to provide an optical signal transfer apparatus.

  A fourth object of the present invention is to provide a plurality of outputs with a simple configuration and simple control for a multi-wavelength optical signal input from a single fiber without using a low-speed optical matrix switch or an expensive wavelength variable light source. An object of the present invention is to provide a wavelength division multiplexing optical signal transfer apparatus capable of performing load distribution to ports.

  A fifth object of the present invention is to perform load distribution to a plurality of output ports with a simple configuration and simple control for multi-wavelength continuous light without using a low-speed optical matrix switch or an expensive wavelength variable light source. It is an object of the present invention to provide a wavelength division multiplexing optical signal transfer apparatus.

  The sixth object of the present invention is to provide a plurality of outputs with a simple configuration and simple control for multi-wavelength continuous light input from one fiber without using a low-speed optical matrix switch or an expensive wavelength variable light source. An object of the present invention is to provide a wavelength division multiplexing optical signal transfer apparatus capable of performing load distribution to ports.

  A seventh object of the present invention is to provide a wavelength division multiplexed optical signal transfer apparatus capable of switching the output port of a wavelength division multiplexed optical signal without using an expensive wavelength variable light source.

  In order to achieve the first object, a wavelength division multiplexing optical signal transfer apparatus according to the present invention includes a plurality of optical gates that input multiplexed light of a plurality of wavelengths, adjust the transmission amount of the multiplexed light, and output the light, A plurality of wavelengths of multiplexed light that are adjusted to be input to a predetermined input port, the multiplexed light is separated for each wavelength, and light of a predetermined wavelength is output to a predetermined output port corresponding to the input port and the wavelength. And an optical modulator that outputs an optical signal in which intensity modulation corresponding to transmission information is applied to light of each wavelength output from the first array waveguide diffraction grating to a plurality of output ports. A second arrayed waveguide diffraction grating that inputs optical signals of respective wavelengths to independent input ports and combines them to output multiplexed light to a predetermined output port corresponding to the input port and wavelength; It is characterized by having.

  In order to achieve the second object, a wavelength division multiplexing optical signal transfer apparatus according to the present invention inputs a multi-wavelength multiplexed light and branches it into a plurality of paths, and inputs a plurality of branched multiplexed lights. A plurality of optical gates for adjusting and transmitting the amount of transmission of the multiplexed light and a plurality of wavelengths of multiplexed light for which the amount of transmission is adjusted are respectively input to predetermined input ports, and the multiplexed light is separated for each wavelength and input. A first arrayed waveguide diffraction grating that outputs light of a predetermined wavelength to a predetermined output port corresponding to the port and wavelength, and light of each wavelength that the first arrayed waveguide diffraction grating outputs to a plurality of output ports An optical modulator that outputs an optical signal to which intensity modulation corresponding to transmission information is applied, and an optical signal of each wavelength are input to independent input ports and combined to correspond to the input port and wavelength. Outputs multiplexed light multiplexed to a specified output port Characterized by comprising an array waveguide diffraction grating.

  In order to achieve the third object, a wavelength division multiplexing optical signal transfer apparatus according to the present invention includes a plurality of optical gates that input multiplexed light of a plurality of wavelengths, adjust the transmission amount of the multiplexed light, and output the transmission light. A plurality of adjusted multiplexed light beams having a plurality of wavelengths are respectively input to a predetermined input port, the multiplexed light is separated for each wavelength, and light having a predetermined wavelength is output to a predetermined output port corresponding to the input port and the wavelength. Array waveguide diffraction grating, a plurality of delay devices that output the respective wavelength light output from the first array waveguide diffraction grating to the plurality of output ports with a predetermined time delay, and the delayed light of each wavelength And a second arrayed waveguide grating for outputting the multiplexed light to a predetermined output port corresponding to the input port and wavelength. And

  In order to achieve the fourth object, the wavelength division multiplexing optical signal transfer apparatus of the present invention inputs a plurality of wavelengths of multiplexed light and branches to a plurality of paths, and inputs a plurality of branched multiplexed lights. A plurality of optical gates for adjusting and transmitting the amount of transmission of the multiplexed light and a plurality of wavelengths of multiplexed light for which the amount of transmission is adjusted are respectively input to predetermined input ports, and the multiplexed light is separated for each wavelength and input. A first arrayed waveguide diffraction grating that outputs light of a predetermined wavelength to a predetermined output port corresponding to the port and wavelength, and light of each wavelength that the first arrayed waveguide diffraction grating outputs to a plurality of output ports A plurality of delay devices that output with a predetermined time delay, and the delayed light of each wavelength are input to independent input ports and multiplexed to a predetermined output port corresponding to the input port and wavelength. Second array conductor that outputs multiplexed multiplexed light Characterized in that a road diffraction grating.

  In order to achieve the fifth object, a wavelength division multiplexing optical signal transfer apparatus according to the present invention includes a plurality of optical gates that input multiplexed light of a plurality of wavelengths, adjust the transmission amount of the multiplexed light, and output the transmission light. A plurality of adjusted multiplexed light beams having a plurality of wavelengths are respectively input to a predetermined input port, the multiplexed light is separated for each wavelength, and light having a predetermined wavelength is output to a predetermined output port corresponding to the input port and the wavelength. And an optical modulator that outputs an optical signal in which intensity modulation corresponding to transmission information is applied to light of each wavelength output from the first array waveguide diffraction grating to a plurality of output ports. , A plurality of delay devices for outputting the light of each wavelength output from the first arrayed waveguide diffraction grating to the plurality of output ports with a predetermined time delay, and an optical signal of each wavelength applied with the intensity modulation and delayed To each independent input port Multiplexes in force, characterized by comprising a second array waveguide grating for outputting multiplexed light multiplexed by a predetermined output port corresponding to the input port and wavelengths.

  In order to achieve the sixth object, a wavelength division multiplexing optical signal transfer apparatus according to the present invention inputs a multi-wavelength multiplexed light and branches it into a plurality of paths, and inputs a plurality of branched multiplexed lights. A plurality of optical gates for adjusting and transmitting the amount of transmission of the multiplexed light and a plurality of wavelengths of multiplexed light for which the amount of transmission is adjusted are respectively input to predetermined input ports, and the multiplexed light is separated for each wavelength and input. A first arrayed waveguide diffraction grating that outputs light of a predetermined wavelength to a predetermined output port corresponding to the port and wavelength, and light of each wavelength that the first arrayed waveguide diffraction grating outputs to a plurality of output ports An optical modulator that outputs an optical signal to which intensity modulation corresponding to transmission information is applied, and light of each wavelength output to the plurality of output ports by the first arrayed waveguide diffraction grating is delayed for a predetermined time. Apply multiple delay devices to output and intensity modulation In addition, the optical signals of each wavelength delayed together are input to independent input ports and multiplexed, and the second array optical signal that outputs multiplexed light to a predetermined output port corresponding to the input port and wavelength is output. And a waveguide diffraction grating.

  In order to achieve the seventh object, a wavelength division multiplexing optical signal transfer apparatus according to the present invention includes a plurality of fixed wavelength light sources that output light of different wavelengths, and a plurality of wavelengths of light output by the plurality of fixed wavelength light sources. And a branching unit of the wavelength division multiplexing optical signal transfer apparatus that receives a plurality of wavelengths of multiplexed light output from the junction.

  According to the present invention, a plurality of optical gates that input a plurality of wavelengths of multiplexed light, adjust the amount of transmission of the multiplexed light, and output the light, and a plurality of wavelengths of multiplexed light whose amount of transmission has been adjusted are respectively input to a predetermined input port. A first array waveguide diffraction grating that inputs and separates the multiplexed light for each wavelength and outputs light of a predetermined wavelength to a predetermined output port corresponding to the input port and the wavelength; and a first array waveguide An optical modulator that outputs an optical signal in which intensity modulation corresponding to transmission information is applied to light of each wavelength output by a diffraction grating to multiple output ports, and an optical signal of each wavelength are input to independent input ports. And a second arrayed-waveguide diffraction grating that outputs multiplexed light that is multiplexed and input to a predetermined output port corresponding to the input port and wavelength, so that a low-speed optical matrix switch or an expensive wavelength variable light source is provided. Simple configuration without using One simple control, it is possible to transmit by switching at a high speed WDM optical signal to any destination.

  Further, according to the present invention, a branching device that inputs multiplexed light of a plurality of wavelengths and branches to a plurality of paths, and a plurality of devices that input a plurality of branched multiplexed light, adjust the transmission amount of the multiplexed light, and output it. And a plurality of wavelengths of multiplexed light whose transmission amounts are adjusted are respectively input to a predetermined input port, and the multiplexed light is separated for each wavelength, and is input to a predetermined output port corresponding to the input port and the wavelength. A first array waveguide diffraction grating that outputs light of a wavelength, and an optical signal in which intensity modulation corresponding to transmission information is applied to light of each wavelength output to a plurality of output ports by the first array waveguide diffraction grating And an optical modulator that outputs optical signals of each wavelength and inputs the multiplexed signals to independent input ports, and outputs multiplexed light that is multiplexed to a predetermined output port corresponding to the input port and wavelength. 2 array waveguide diffraction grating Wavelength multiplexed optical signals can be switched to any destination at high speed with simple configuration and simple control of multi-wavelength continuous light input from a single fiber without using an optical matrix switch or an expensive variable wavelength light source. Can be sent.

  Further, according to the present invention, a plurality of optical gates for inputting a plurality of wavelengths of multiplexed light, adjusting the amount of transmission of the multiplexed light and outputting the light, and a plurality of wavelengths of multiplexed light for which the amount of transmission has been adjusted are respectively input to predetermined input ports. A first array waveguide diffraction grating that inputs and separates the multiplexed light for each wavelength and outputs light of a predetermined wavelength to a predetermined output port corresponding to the input port and the wavelength; and a first array waveguide A plurality of delay devices that output the light of each wavelength output from the diffraction grating to a plurality of output ports with a predetermined time delay, and the delayed light of each wavelength is input to an independent input port and multiplexed and input. Since the second arrayed waveguide diffraction grating for outputting the multiplexed multiplexed light is provided at a predetermined output port corresponding to the port and the wavelength, without using a low-speed optical matrix switch or an expensive wavelength variable light source Simple configuration and easy In Do control, it becomes possible to perform load balancing across multiple output ports.

  Further, according to the present invention, a branching device that inputs multiplexed light of a plurality of wavelengths and branches to a plurality of paths, and a plurality of devices that input a plurality of branched multiplexed light, adjust the transmission amount of the multiplexed light, and output it. And a plurality of wavelengths of multiplexed light whose transmission amounts are adjusted are respectively input to a predetermined input port, and the multiplexed light is separated for each wavelength, and is input to a predetermined output port corresponding to the input port and the wavelength. A first arrayed-waveguide diffraction grating that outputs light of a wavelength; and a plurality of delayers that output the light of each wavelength output from the first arrayed-waveguide diffraction grating to a plurality of output ports with a predetermined time delay The second arrayed waveguides that input the delayed light of each wavelength to the independent input ports and combine them, and output the multiplexed light to the predetermined output port corresponding to the input port and the wavelength. Slow optical matrix with a diffraction grating Without using switches or expensive variable wavelength light source, with a simple configuration and simple control for multi-wavelength optical signal input from one fiber, it becomes possible to perform load balancing across multiple output ports.

  Further, according to the present invention, a plurality of optical gates for inputting a plurality of wavelengths of multiplexed light, adjusting the amount of transmission of the multiplexed light and outputting the light, and a plurality of wavelengths of multiplexed light for which the amount of transmission has been adjusted are respectively input to predetermined input ports. A first array waveguide diffraction grating that inputs and separates the multiplexed light for each wavelength and outputs light of a predetermined wavelength to a predetermined output port corresponding to the input port and the wavelength; and a first array waveguide An optical modulator that outputs an optical signal in which intensity modulation corresponding to transmission information is applied to light of each wavelength output by the diffraction grating to the plurality of output ports, and the first arrayed waveguide diffraction grating includes the plurality of output ports. A plurality of delay devices that output the light of each wavelength delayed by a predetermined time and the optical signals of each wavelength that are delayed while applying intensity modulation are input to independent input ports and combined. , Corresponding to input port and wavelength And a second arrayed waveguide grating that outputs multiplexed light combined with a predetermined output port, so that a simple multi-wavelength continuous light can be obtained without using a low-speed optical matrix switch or an expensive wavelength variable light source. With configuration and simple control, load distribution to a plurality of output ports can be performed.

  Further, according to the present invention, a branching device that inputs multiplexed light of a plurality of wavelengths and branches to a plurality of paths, and a plurality of devices that input a plurality of branched multiplexed light, adjust the transmission amount of the multiplexed light, and output it. And a plurality of wavelengths of multiplexed light whose transmission amounts are adjusted are respectively input to a predetermined input port, and the multiplexed light is separated for each wavelength, and is input to a predetermined output port corresponding to the input port and the wavelength. A first arrayed waveguide diffraction grating that outputs light of a wavelength, and light in which intensity modulation corresponding to transmission information is applied to light of each wavelength output to the plurality of output ports by the first arrayed waveguide diffraction grating An optical modulator for outputting a signal, a plurality of delay devices for outputting the light of each wavelength output from the first arrayed waveguide diffraction grating to the plurality of output ports with a predetermined time delay, and applying intensity modulation Each delayed optical signal of each wavelength Since the second arrayed-waveguide diffraction grating that outputs the multiplexed light that is input to the input port and multiplexed and multiplexed to a predetermined output port corresponding to the input port and the wavelength is provided. Without using an optical matrix switch or an expensive variable wavelength light source, load distribution to multiple output ports can be performed with a simple configuration and simple control for multi-wavelength continuous light input from a single fiber. .

  The best mode for carrying out the present invention will be described below with reference to the drawings.

  FIG. 1 is a block diagram showing a first embodiment of a wavelength division multiplexing optical signal transfer apparatus according to the present invention, which is an example in the case of transferring optical signals multiplexed for four wavelengths.

  As shown in the figure, the wavelength division multiplexing optical signal transfer apparatus according to the present invention includes a plurality of fixed wavelength light sources 11-1 to 11-4 (in the example shown in FIG. A plurality of fixed wavelength light sources 11-1 to 11-4 are combined into a single optical fiber to output multiplexed light. (An arrayed waveguide diffraction grating may be used) and a plurality of fixed-wavelength multiplexed light passing through one optical fiber are input and branched into a plurality of paths (four paths in the example shown in the figure) And a branching device 13 for inputting, and optical gates 14-1 to 14-4 for inputting a plurality of light beams having a plurality of fixed wavelengths after branching and switching a light blocking state and a light passing state by adjusting a transmission amount of the multiplexed light. , Multiple fixed-wavelength multiplexed light with controlled transmission An arrayed waveguide diffraction grating 15 (first arrayed waveguide diffraction grating) that inputs to a fixed input port, separates the multiplexed light for each fixed wavelength, and outputs it to a predetermined output port corresponding to the input port and wavelength. ), And optical modulators 16-1 to 16-4 (in the example shown in the figure, four units) that apply intensity modulation corresponding to the electrical signal of the transmission information output from the transmitter 19 to light of each fixed wavelength. And an optical modulator), and optical signals of each wavelength are input to independent ports and multiplexed, and multiplexed to a predetermined output port (destination) corresponding to the input port and wavelength. An arrayed waveguide diffraction grating 17 (second arrayed waveguide diffraction grating) that outputs light is provided.

  The arrayed waveguide diffraction grating 15 includes an input waveguide 35, a slab waveguide 36, an arrayed waveguide 37, a slab waveguide 38, and an output waveguide 39.

  For example, the multiplexed light input to one input waveguide 35 is spread by diffraction in the slab waveguide 36 and then input to the arrayed waveguide 37. In the arrayed waveguide 37, a constant optical phase difference is given between optical signals passing through adjacent waveguides due to a difference in path length. The light that has passed through the arrayed waveguide 37 is condensed on one path of the output waveguide 39 by the slab waveguide 38.

  The output port at which the input light is collected is determined by the optical phase difference between adjacent waveguides given when passing through the arrayed waveguide 37. Since this optical phase difference depends on the wavelength, the condensing position also depends on the wavelength. Accordingly, optical signals having different wavelengths are guided to different output waveguides 39 and propagated to the optical modulators 16-1 to 16-4 connected thereto.

  Similarly, the arrayed waveguide diffraction grating 17 includes an input waveguide 45, a slab waveguide 46, an arrayed waveguide 47, a slab waveguide 48, and an output waveguide 49.

  As shown in FIG. 1, the fixed wavelength light sources 11-1 to 11-4 output fixed wavelength light (CW light) having different wavelengths λ1, λ2, λ3, and λ4, respectively. The four fixed wavelength lights output from these fixed wavelength light sources 11-1 to 11-4 pass through the combiner 12 and the branching device 13 and reach the four optical gates 14-1 to 14-4.

  In the present invention, one of the four optical gates 14-1 to 14-4 is turned on (maximum transmittance) and the remaining three gates are turned off (minimum transmittance), whereby a multiplexed signal of light is obtained. Destination (destination) is determined. The four-wavelength optical signals λ1, λ2, λ3, and λ4 that have passed through one optical gate (for example, 14-1) pass through the arrayed waveguide grating 15 for each wavelength of λ1, λ2, λ3, and λ4. And arrive at four optical modulators 16-1 to 16-4.

  Each of the optical modulators 16-1 to 16-4 performs intensity modulation corresponding to the electrical signal of the transmission information on the fixed wavelength light (CW light) of each wavelength input from each of the optical gates 14-1 to 14-4. Applied and output as an optical signal. The optical signals of the respective wavelengths output from the optical modulators 16-1 to 16-4 are input to predetermined ports of the arrayed waveguide grating 17. The optical signals of the respective wavelengths input by the arrayed waveguide diffraction grating 17 are multiplexed and reach one predetermined output port corresponding to the input wavelength and the input port.

  At this time, destination control to which output port (destination) the input optical signal of each wavelength is output is determined by which input port each of the plurality of fixed wavelength modulated lights is input. In other words, destination control of which output port (destination) the input optical signal of each wavelength is output is based on selection of which optical gate to turn on among the four optical gates 14-1 to 14-4. Do.

  For example, when the optical gate 14-1 is turned on, the optical modulator 16-1 inputs light having a fixed wavelength of wavelength λ1. The optical modulator 16-2 receives light having a wavelength λ2, the optical modulator 16-3 receives light having a wavelength λ3, and the optical modulator 16-4 receives wavelength λ4.

  Each of the optical modulators 16-1 to 16-4 applies intensity modulation to the optical signals of the wavelengths λ1, λ2, λ3, and λ4 and outputs the optical signals. The optical signals having the wavelengths λ1, λ2, λ3, and λ4 output from the optical modulators 16-1 to 16-4 are multiplexed by the arrayed waveguide diffraction grating 17 and then output from a predetermined output port 18-1. Is output.

  When the optical gate 14-2 is turned on, the optical modulator 16-1 inputs light having a fixed wavelength of wavelength λ2. The optical modulator 16-2 receives light having a wavelength λ3, the optical modulator 16-3 receives light having a wavelength λ4, and the optical modulator 16-4 inputs light having a wavelength λ1.

  Each of the optical modulators 16-1 to 16-4 applies an intensity modulation to the optical signals having wavelengths λ2, λ3, λ4, and λ1, and outputs the optical signals. The optical signals of the wavelengths λ2, λ3, λ4, and λ1 output from the optical modulators 16-1 to 16-4 are multiplexed by the arrayed waveguide diffraction grating 17 and then output from a predetermined output port 18-2. Is output.

  In this way, it is possible to select the output port of the multiplexed signal by selecting the optical gate that allows the multiplexed light to pass through without using an expensive wavelength variable light source. Therefore, it is possible to simplify the switching control and increase the switching time.

  In the example shown in FIG. 1, optical modulators 16-1 to 16-4 that apply intensity modulation to light of each wavelength are provided between the arrayed waveguide diffraction grating 15 and the arrayed waveguide diffraction grating 17. Although an example is shown, the optical modulators 16-1 to 16-4 may be provided between the fixed wavelength light sources 11-1 to 11-4 and the merger 12.

  In the example illustrated in FIG. 1, the case where one output port for wavelength multiplexed optical signals is selected has been described. However, it is possible to output the same wavelength multiplexed optical signal to a plurality of output ports. For example, in FIG. 1, when two optical gates 14-1 and 14-2 are selected as optical gates to be turned on (maximum transmittance), the same wavelength multiplexed optical signal is simultaneously output to the output ports 18-1 and 18-2. The

  FIG. 2 is a diagram illustrating a relationship between an optical gate that allows multiple light to pass through and an output port selected at that time.

  According to the present invention, by turning on a specific optical gate, multiplexed light of a plurality of wavelengths is once separated for each wavelength and then combined, and the combined wavelength multiplexed optical signal is output to a predetermined output port. Is possible.

  FIG. 3 is a diagram showing a connection configuration example of an optical signal information processing apparatus using the wavelength division multiplexing optical signal transfer apparatus according to the present invention.

  In the example of the connection configuration of the optical signal information processing apparatus shown in the figure, five information processing apparatuses 21-1 to 21-5 having four input / output ports are provided, and each information processing apparatus 21-1 to 21-5 is provided. The input / output ports 21-5 are connected to the input / output ports of the respective information processing devices 21-1 to 21-5.

  The information processing devices 21-1 to 21-5 include, for example, transmission devices 22-1 to 22-5 having four optical signal output ports and receiving devices 23-1 to 23-1 having four optical signal input ports. 23-5. The wavelength division multiplexing optical signal transfer apparatus 10 according to the present invention shown in FIG. 1 is used as the transmission apparatuses 22-1 to 22-5. As the receiving devices 23-1 to 23-5, for example, the configuration shown in FIG. 4 is used.

  Each of the transmission devices 22-1 to 22-5 can output, for example, an optical multiplexed signal with four wavelengths to four different output ports. Each output port is connected to receiving devices 23-1 to 23-5 provided in the other four information processing devices 21-1 to 21-5. By using such a connection configuration, a plurality of information processing apparatuses 21-1 to 21-5 can be connected to each other without newly providing a connection switching apparatus.

  FIG. 4 is a diagram illustrating a configuration example of a receiving device.

  As shown in the figure, the receiving device 23 separates the input wavelength-multiplexed optical signals for each fixed wavelength from the input ports 31-1 to 31-4 for inputting the wavelength-multiplexed optical signals from the information processing device 21. The arrayed waveguide diffraction grating 32 to be output to the wavelength multiplexed signal receivers 33-1 to 33-4, and the wavelength multiplexed signal receivers 33-1 to 33- that input optical signals for each fixed wavelength and convert them into electrical signals. 4 is provided.

  The arrayed waveguide diffraction grating 32 of the receiving device 23 inputs wavelength multiplexed optical signals such as λ1, λ2, λ3, and λ4 from different information processing devices 21 through the input ports 31-1 to 31-4, and λ1, The signals are separated for each fixed wavelength such as λ2, λ3, and λ4 and output to different wavelength multiplexed signal receivers 33-1 to 33-4.

  For example, when optical signals of four wavelengths λ1, λ2, λ3, and λ4 are input to the input port 31-1, the wavelength multiplexed signal receiver 33-1 is an optical signal of wavelength λ1, wavelength multiplexed signal receiver 33-2. Can receive an optical signal of wavelength λ2, a wavelength multiplexed signal receiver 33-3 can receive an optical signal of wavelength λ3, and a wavelength multiplexed signal receiver 33-4 can receive an optical signal of wavelength λ4.

  FIG. 5 is a diagram showing a second embodiment of the wavelength division multiplexing optical signal transfer apparatus using the multi-wavelength generation light source.

  In FIG. 1, four fixed wavelength light sources 11-1 to 11-4 are arranged as light sources. However, as shown in FIG. 5, the multi-wavelength light source 41 may be used in a wavelength multiplexing optical signal transfer apparatus. It is possible to achieve the object of the invention. As the multi-wavelength generation light source 41, for example, a method of generating multi-wavelength continuous light having a frequency interval f from an optical pulse generated at a repetition frequency f can be considered.

  FIG. 6 is a diagram for explaining a third embodiment of the wavelength division multiplexing optical signal transfer apparatus provided with an optical amplifier for compensating for branching loss.

  In the wavelength division multiplexing optical signal transfer apparatus shown in the figure, optical amplifiers 51-1 to 51-4 for compensating for branching loss caused by the branching device 13 are provided at the subsequent stage of the arrayed waveguide diffraction grating 15. In the wavelength division multiplexing optical signal transfer apparatus shown in FIG. 1, the branching loss is caused by the branching unit 13, but the optical amplifiers 51-1 to 51-4 for compensating for the branching loss are used as shown in FIG. By doing so, the gain of the lost optical signal can be compensated.

  In the example shown in FIG. 6, the continuous light of each wavelength that has passed through the arrayed waveguide diffraction grating 15 is input to the optical amplifiers 51-1 to 51-4 and amplified, and then to the optical modulators 16-1 to 16-4. You are typing. As described above, since the optical amplifiers 51-1 to 51-4 only need to amplify the continuous light instead of the data modulated optical signal, the added noise can be suppressed even when a small semiconductor optical amplifier is used. It is.

  FIG. 7 is a configuration diagram of the fourth embodiment of the wavelength division multiplexing optical signal transfer apparatus according to the present invention.

  The wavelength division multiplexing optical signal transfer apparatus shown in the figure includes the transmitters 19-1 to 61-1 independent of the optical modulators 16-1 to 16-4 in the transmitter 19 of the wavelength division multiplexing optical signal transfer apparatus 10 shown in FIG. 61-4, delay units 62-1 to 62-4 are provided in the subsequent stages of the optical modulators 16-1 to 16-4, and can be used as load distributors.

  The delay devices 62-1 to 62-4 output optical signals delayed by a predetermined time. In this embodiment, the delay time of the delay device 61-1 is set to 3Δt, and the delay time of the delay device 16-2 is set. The time is set to 2Δt, the delay time by the delay device 16-3 is set to Δt, and the delay time by the delay device 16-4 is set to 0.

  The embodiment shown in FIG. 7 is an example of a system using four wavelengths. As shown in the figure, the fixed wavelength light sources 11-1 to 11-4 output fixed wavelength light (CW light) having different wavelengths λ1, λ2, λ3, and λ4, respectively. The four fixed wavelength lights output from these fixed wavelength light sources 11-1 to 11-4 pass through the combiner 12 and the branching device 13 and reach the four optical gates 14-1 to 14-4.

  In the present invention, one of the four optical gates 14-1 to 14-4 is turned on (maximum transmittance) for a fixed time Δt, and the remaining three are turned off (minimum transmittance). By sequentially changing the optical gates in the on state, the transmission destination of the multiplexed optical signal is determined. The four-wavelength optical signals λ1, λ2, λ3, and λ4 that have passed through one optical gate (for example, 14-1) pass through the arrayed waveguide grating 15 for each wavelength of λ1, λ2, λ3, and λ4. And reach four optical modulators 16-1 to 16-4, respectively.

  The four optical modulators 16-1 to 16-4 respectively receive electrical information of transmission information for modulation from the four transmitters 61-1 to 61-4. In each of the optical modulators 16-1 to 16-4, intensity modulation corresponding to an electrical signal of transmission information for modulation is applied to the CW light of each wavelength and output as an optical signal. The optical signals output from the respective optical modulators 16-1 to 16-4 further pass through the respective delay units 62-1 to 62-4.

  The optical signals output from the delay devices 62-1 to 62-4 pass through the arrayed waveguide diffraction grating 17 and are output from the output ports 18-1 to 18-4. In the configuration shown in FIG. 7, the optical signals output from the transmitters 16-1 to 16-4 are distributed to the four output ports 18-1 to 18-4 for a certain period of time. Since the delay time 6-2 is set to 2Δt, the delay device 62-3 is set to Δt, and the delay device 62-4 is set to 0, the wavelength multiplexing optical signal transfer apparatus shown in FIG. It becomes possible to play a role. 8 to 10 show the wavelength and timing of the optical signal in each part in the configuration shown in FIG.

  FIG. 8 is a diagram showing the wavelengths of optical signals output from the optical modulators 16-1 to 16-4 having the configuration shown in FIG. 7 and their timings.

  In the figure, the signal applied to the light having the wavelength λ1 from the first optical modulator 16-1 in the time slot n is regarded as a packet and represented as “M1, n (λ1)”. In time slot n, since only the optical gate 14-1 is turned on, the wavelengths of light passing through the optical modulators 16-1 to 16-4 are sequentially λ1, λ2, λ3, and λ4.

  After this state continues for time Δt, in the next time slot n + 1, only the optical gate 14-2 is turned on, so that the wavelengths of the light passing through the optical modulators 16-1 to 16-4 are λ2, λ3, λ4, and λ1.

  Further, in the next time slot n + 2, since only the optical gate 14-3 is turned on, the wavelengths of light passing through the optical modulators 16-1 to 16-4 are sequentially λ3, λ4, λ1, and λ2.

  In the next time slot n + 3, since only the optical gate 14-4 is turned on, the wavelengths of light passing through the optical modulators 16-1 to 16-4 are sequentially λ4, λ1, λ2, and λ3. In the next time slot, the optical gate 14-1 is turned on again.

  In this way, it is possible to switch the wavelength of light passing through the optical modulators 16-1 to 16-4 each time the optical gates 14-1 to 14-4 in the on state are switched.

  FIG. 9 is a diagram showing the wavelength of the optical signal output from the delay devices 62-1 to 62-4 configured as shown in FIG. 7 and its timing.

  In this embodiment, the delay times in the delay devices 62-1, 62-2, 62-3, and 62-4 are 3Δt, 2Δt, Δt, and 0, respectively. Can be obtained. When these optical signals are passed through the arrayed waveguide diffraction grating 17, the temporal relationship of the optical signals output from the four output ports 18-1 to 18-4 is as shown in FIG.

  FIG. 10 is a diagram illustrating the relationship between the wavelength of light output from each delay device and the output destination of the arrayed waveguide grating 17.

  As shown in the figure, when light having a wavelength of λ2 is output from the delay device 62-1, the light having the wavelength is output to the output port 18-2. Similarly, the light of wavelength λ4 output from the delay device 62-2 is output to the output port 18-3, and the light of wavelength λ2 output from the delay device 62-3 is output to the output port 18-4. The light of wavelength λ4 output from 62-4 is output to the output port 18-1.

  FIG. 11 is a diagram showing the wavelengths of optical signals output from the output ports 18-1 to 18-4 configured as shown in FIG. 7 and their timings.

  As shown in the figure, the optical signals output from the output ports 18-1 to 18-4 have different wavelengths every time Δt.

  In the above description, an optical signal having four wavelengths is described as an example of the wavelength multiplexed optical signal. However, the present invention does not limit the number of wavelengths to four wavelengths, and two or more wavelengths are two or more. The present invention can be implemented for a wavelength division multiplexing optical signal transfer apparatus that switches to an output port for output. In the above description, the optical modulators 16-1 to 16-4 input the electrical signal of the transmission information and apply intensity modulation to the continuous light. However, the present invention is limited to this. The object of the present invention can also be achieved by using an all-optical type optical modulator that inputs an optical signal and applies intensity modulation to continuous light.

  Even when a data transmission capacity significantly exceeding 10 to 40 Gb / s is required due to the expansion of application of optical fiber communication technology, a multiplexed optical signal can be converted into a wavelength by using the wavelength multiplexing optical signal transfer apparatus according to the present invention. Since it is possible to perform spatial separation by spectroscopic means every time, it is possible to utilize the wavelength as destination information. Therefore, various controls in the middle of the transmission path can be directly performed without once converting the optical signal into an electrical signal, and the destination of information can be switched at high speed with a simpler structure and simpler control. It becomes possible.

It is a block diagram which shows 1st embodiment of the wavelength division multiplexing optical signal transfer apparatus which concerns on this invention. It is a figure which shows the relationship between the optical gate which allows multiple light to pass through, and the output port selected at that time. It is a figure which shows the example of a connection structure of the information processing apparatus of the optical signal using the wavelength division multiplexing optical signal transfer apparatus which concerns on this invention. It is a figure which shows the structural example of a receiver. It is a figure which shows the 2nd Example of the wavelength multiplexing optical signal transfer apparatus using a multiwavelength generation light source. It is a figure explaining the 3rd Example of the wavelength division multiplexing optical signal transfer apparatus provided with the optical amplifier which compensates a branching loss. It is a block diagram of 4th embodiment of the wavelength division multiplexing optical signal transfer apparatus which concerns on this invention. It is a figure which shows the wavelength of the optical signal output from the optical modulator of the structure shown in FIG. 7, and its timing. It is a figure which shows the wavelength of the optical signal output from the delay device of the structure shown in FIG. 7, and its timing. It is a figure which shows the relationship between the wavelength of the light which each delay device outputs, and the output destination of an arrayed-waveguide diffraction grating. It is a figure which shows the wavelength of the optical signal output from the output port of the structure shown in FIG. 7, and its timing. It is a block diagram of the conventional lightwave address system. It is a figure which shows the relationship between the wavelength which an optical signal processor outputs, and the wavelength which a light receiving element receives.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Wavelength multiplexing optical signal transfer apparatus 11-1 to 11-4 Fixed wavelength light source 12 Merger 13 Branch device 14-1 to 14-4 Optical gate 15 Array waveguide diffraction grating 16-1 to 16-4 Optical modulator 17 Array Waveguide diffraction grating 18-1 to 18-4 Output port 19 Transmitter 21-1 to 21-5 Information processing device 22-1 to 22-5 Transmitter 23, 233-1 to 23-5 Receiver 31-1 31-4 Input Port 32 Array Waveguide Diffraction Grating 33-1 to 33-4 Wavelength Multiplexed Optical Signal Receiver 35 Input Waveguide 36 Slab Waveguide 37 Array Waveguide 37 Slab Waveguide 39 Output Waveguide 41 Multiwavelength Light Source 45 Input Waveguide 46 Slab Waveguide 47 Array Waveguide 48 Slab Waveguide 49 Output Waveguide 51-1 to 51-4 Optical Amplifier 61-1 to 61-4 Transmitter 62-1 to 6 2-4 Delay units 71-1 to 71-4 Variable wavelength semiconductor laser light sources 72-1 to 72-4 Optical modulator 73 Array waveguide diffraction grating 74-1 to 74-4 Receiver 75 Input waveguide 76 Slab waveguide 77 Arrayed waveguide diffraction grating 78 Slab waveguide 79 Output waveguide 80-1 to 80-4 Polarization compensator

Claims (7)

A plurality of optical gates that input multiplexed light of a plurality of wavelengths, adjust the amount of transmission of the multiplexed light, and output;
Multiplexed light of a plurality of wavelengths adjusted in transmission amount is input to a predetermined input port, the multiplexed light is separated for each wavelength, and light of a predetermined wavelength is output to a predetermined output port corresponding to the input port and the wavelength. A first arrayed waveguide grating that outputs
An optical modulator that outputs an optical signal in which intensity modulation corresponding to transmission information is applied to light of each wavelength output by the first arrayed waveguide diffraction grating to a plurality of output ports;
A second arrayed-waveguide diffraction grating for inputting the optical signals of the respective wavelengths to independent input ports for multiplexing and outputting multiplexed light to a predetermined output port corresponding to the input port and wavelength; ,
A wavelength-division multiplexed optical signal transfer device. A branching device that inputs multiple light beams of multiple wavelengths and branches into multiple paths;
A plurality of optical gates that input a plurality of multiplexed lights after branching, adjust the transmission amount of the multiplexed lights, and output them;
Multiplexed light of a plurality of wavelengths adjusted in transmission amount is input to a predetermined input port, the multiplexed light is separated for each wavelength, and light of a predetermined wavelength is output to a predetermined output port corresponding to the input port and the wavelength. A first arrayed waveguide grating that outputs
An optical modulator that outputs an optical signal in which intensity modulation corresponding to transmission information is applied to light of each wavelength output by the first arrayed waveguide diffraction grating to a plurality of output ports;
A second arrayed-waveguide diffraction grating for inputting the optical signals of the respective wavelengths to independent input ports for multiplexing and outputting multiplexed light to a predetermined output port corresponding to the input port and wavelength; ,
A wavelength-division multiplexed optical signal transfer device. A plurality of optical gates that input multiplexed light of a plurality of wavelengths, adjust the amount of transmission of the multiplexed light, and output;
Multiplexed light of a plurality of wavelengths adjusted in transmission amount is input to a predetermined input port, the multiplexed light is separated for each wavelength, and light of a predetermined wavelength is output to a predetermined output port corresponding to the input port and the wavelength. A first arrayed waveguide grating that outputs
A plurality of delay devices that output the light of each wavelength output from the first arrayed waveguide diffraction grating to the plurality of output ports with a predetermined time delay;
A second arrayed waveguide that inputs the delayed light of each wavelength to an independent input port for multiplexing and outputs the multiplexed light to a predetermined output port corresponding to the input port and wavelength. A diffraction grating,
A wavelength-division multiplexed optical signal transfer device. A branching device that inputs multiple light beams of multiple wavelengths and branches into multiple paths;
A plurality of optical gates that input a plurality of multiplexed lights after branching, adjust the transmission amount of the multiplexed lights, and output them;
Multiplexed light of a plurality of wavelengths adjusted in transmission amount is input to a predetermined input port, the multiplexed light is separated for each wavelength, and light of a predetermined wavelength is output to a predetermined output port corresponding to the input port and the wavelength. A first arrayed waveguide grating that outputs
A plurality of delay devices that output the light of each wavelength output from the first arrayed waveguide diffraction grating to the plurality of output ports with a predetermined time delay;
A second arrayed waveguide that inputs the delayed light of each wavelength to an independent input port for multiplexing and outputs the multiplexed light to a predetermined output port corresponding to the input port and wavelength. A diffraction grating,
A wavelength-division multiplexed optical signal transfer device. A plurality of optical gates that input multiplexed light of a plurality of wavelengths, adjust the amount of transmission of the multiplexed light, and output;
Multiplexed light of a plurality of wavelengths adjusted in transmission amount is input to a predetermined input port, the multiplexed light is separated for each wavelength, and light of a predetermined wavelength is output to a predetermined output port corresponding to the input port and the wavelength. A first arrayed waveguide grating that outputs
An optical modulator that outputs an optical signal in which intensity modulation corresponding to transmission information is applied to light of each wavelength output by the first arrayed waveguide diffraction grating to a plurality of output ports;
A plurality of delay devices that output the light of each wavelength output from the first arrayed waveguide diffraction grating to the plurality of output ports with a predetermined time delay;
Applying the intensity modulation and delaying the optical signals of each wavelength are input to independent input ports and multiplexed, and the multiplexed light is output to a predetermined output port corresponding to the input port and wavelength. A second arrayed waveguide grating;
A wavelength-division multiplexed optical signal transfer device. A branching device that inputs multiple light beams of multiple wavelengths and branches into multiple paths;
A plurality of optical gates that input a plurality of multiplexed lights after branching, adjust the transmission amount of the multiplexed lights, and output them;
Multiplexed light of a plurality of wavelengths adjusted in transmission amount is input to a predetermined input port, the multiplexed light is separated for each wavelength, and light of a predetermined wavelength is output to a predetermined output port corresponding to the input port and the wavelength. A first arrayed waveguide grating that outputs
An optical modulator that outputs an optical signal in which intensity modulation corresponding to transmission information is applied to light of each wavelength output by the first arrayed waveguide diffraction grating to a plurality of output ports;
A plurality of delay devices that output the light of each wavelength output from the first arrayed waveguide diffraction grating to the plurality of output ports with a predetermined time delay;
Applying the intensity modulation and delaying the optical signals of each wavelength are input to independent input ports and multiplexed, and the multiplexed light is output to a predetermined output port corresponding to the input port and wavelength. A second arrayed waveguide grating;
A wavelength-division multiplexed optical signal transfer device. In the wavelength division multiplexing optical signal transfer device according to any one of claims 2, 4 and 6,
A plurality of fixed wavelength light sources each outputting light of a different wavelength;
A combiner that combines multiple light beams output from the plurality of fixed wavelength light sources and outputs multiplexed light;
2. The wavelength division multiplexing optical signal transfer apparatus according to claim 1, wherein the branching unit receives a plurality of wavelengths of multiplexed light output from the combiner.

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