WO2023029831A1 - Système et procédé de communication optique, et appareil de commutation de signaux optiques - Google Patents

Système et procédé de communication optique, et appareil de commutation de signaux optiques Download PDF

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Publication number
WO2023029831A1
WO2023029831A1 PCT/CN2022/108550 CN2022108550W WO2023029831A1 WO 2023029831 A1 WO2023029831 A1 WO 2023029831A1 CN 2022108550 W CN2022108550 W CN 2022108550W WO 2023029831 A1 WO2023029831 A1 WO 2023029831A1
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signals
optical
optical signal
band
signal
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PCT/CN2022/108550
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English (en)
Chinese (zh)
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张阔
刘耕辰
黄远达
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华为技术有限公司
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Publication of WO2023029831A1 publication Critical patent/WO2023029831A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q11/00—Selecting arrangements for multiplex systems

Definitions

  • the present application relates to the field of optical communication, in particular to an optical communication system, an optical communication method and an optical signal exchange device.
  • FIG. 1 is a schematic structural diagram of an optical communication system.
  • the optical communication system includes three switches.
  • the three switches are switch 101, switch 102, and switch 103, respectively.
  • the switch 101 is respectively connected to the switch 102 and the switch 103 through optical fibers.
  • the optical communication system further includes a transmitter 104 , a transmitter 105 , a receiver 106 and a receiver 107 .
  • the switch 102 is respectively connected to the transmitter 104 and the transmitter 105 through optical fibers.
  • the switch 103 is respectively connected to the receiver 106 and the receiver 107 through optical fibers.
  • Three switches enable communication between multiple points (transmitter 104 and transmitter 105) and multiple points (receiver 106 and receiver 107).
  • the optical signal output by the transmitter 104 can reach the receiver 106 or the receiver 107 through three switches.
  • the optical signal output by the transmitter 105 can reach the receiver 106 or the receiver 107 through three switches.
  • Each switch is used to convert the received optical signal into an electrical signal, convert the electrical signal into an optical signal, and output an optical signal.
  • each switch needs to perform a photoelectric conversion on the optical signal, which results in a relatively high communication delay between the transmitter and the receiver.
  • the present application provides an optical communication system, an optical communication method, and an optical signal exchange device.
  • the optical signal exchange device can directly send signals of different bands to Different receivers, thereby reducing the communication delay between the transmitter and the receiver.
  • the first aspect of the present application provides an optical communication system.
  • the optical communication system includes N transmitters, optical signal switching devices and M receivers. Both N and M are integers greater than 1.
  • the N transmitters are used to send the N first optical signals to the optical signal switching device.
  • the N first optical signals are in one-to-one correspondence with the N transmitters.
  • the optical signal exchanging device is used for dividing each first optical signal into X band signals of different bands to obtain X ⁇ N band signals. Each of the X band signals carries the same digital electrical signal.
  • X is an integer greater than 1 and less than or equal to M.
  • the optical signal exchanging device is also used to obtain M second optical signals according to the X ⁇ N band signals.
  • the M receivers are used to receive M second optical signals from the optical signal switching device.
  • the M second optical signals are in one-to-one correspondence with the M receivers. It should be understood that for different first optical signals, the value of X may be different.
  • the N first optical signals include optical signal 1 and optical signal 2 .
  • the optical signal exchange device is used to divide the optical signal 1 into 2 band signals. At this point, the value of X is 2.
  • the optical signal switching device is used to divide the optical signal 2 into 3 band signals. At this time, the value of X is 3.
  • the optical signal exchange device divides the first optical signal into X band signals.
  • the optical signal switching device can directly send signals of different bands to different receivers without performing photoelectric conversion. Therefore, the present application can reduce the communication delay between the transmitter and the receiver.
  • the wavelength ranges of the N first optical signals are the same.
  • the N transmitters can use light sources that generate the same wavelength band, thereby reducing the later operation and maintenance costs of the optical communication system.
  • X is equal to M.
  • the optical signal switching device is used for multiplexing M ⁇ N band signals to obtain M second optical signals.
  • Each second optical signal includes N band signals of different bands.
  • the N band signals are respectively derived from the N first optical signals.
  • each receiver can receive the second optical signal with N band signals.
  • N band signals come from N transmitters respectively.
  • the optical signal exchange device may be a passive optical device.
  • the optical signal switching device may be an arrayed waveguide grating router (arrayed waveguide grating router, AWGR). Therefore, the present application can reduce the cost of the optical signal switching device.
  • the N first optical signals are in one-to-one correspondence with different N top tone signals.
  • the N band signals of the second optical signal carry different N top-tuning signals.
  • the N band signals of the second optical signal are in one-to-one correspondence with the N top-tuning signals.
  • Each receiver also includes a first mapping.
  • the first mapping relationship includes a mapping relationship between N top-tuning signals and N transmitters.
  • Each receiver is also used to select and modulate the target band signal according to the first mapping relationship.
  • the target band signal is one or more band signals in the N band signals of the second optical signal. Wherein, each receiver can receive the second optical signal with N band signals. Therefore, the receiver may receive unwanted band signals. At this time, the receiver needs to discard unnecessary band signals.
  • the receiver can demodulate N band signals by processing resources to obtain N analog electrical signals.
  • the receiver converts the N analog electrical signals into N digital electrical signals of the physical layer through processing resources.
  • the N digital electrical signals are in one-to-one correspondence with the N analog electrical signals.
  • the receiver converts N digital electrical signals into N data packets at the data link layer or network layer. There is a one-to-one correspondence between the N digital electrical signals and the N data packets.
  • the receiver reads a transmitter's identification in each data telegram.
  • the receiver discards unnecessary data packets according to the identity of the transmitter. If the receiver includes the first mapping relationship, the receiver is further configured to select the target band signal for modulation according to the first mapping relationship. At this time, the receiver may discard unnecessary digital electrical signals among the N digital electrical signals at the physical layer, thereby saving processing resources of the receiver.
  • the N transmitters correspond to different N electrophysical resources.
  • Each receiver includes a second mapping.
  • the second mapping relationship includes a mapping relationship between N electrical physical resources and N transmitters.
  • the N electrophysical resources are in one-to-one correspondence with the N band signals of the second optical signal.
  • Each receiver is also used to obtain N analog electrical signals according to the N band signals of the second optical signal.
  • the N analog electrical signals are in one-to-one correspondence with the N band signals.
  • Each receiver is further configured to select and mediate the analog electrical signal carried on the target electrophysical resource among the N analog electrical signals according to the second mapping relationship.
  • the target electrophysical resource is one or more electrophysical resources in the N electrophysical resources.
  • the receiver is used to select and mediate the analog electrical signal carried on the target electrical physical resource according to the second mapping relationship. At this time, the receiver may discard unnecessary analog electrical signals among the N analog electrical signals, thereby saving processing resources of the receiver.
  • X is smaller than N.
  • the optical signal switching device is used for selectively combining part of the M ⁇ N band signals to obtain M second optical signals.
  • the optical communication system can selectively send part of the N band signals to the receiver by controlling the optical signal switching device. Therefore, the present application can improve the security of the optical communication system.
  • the optical signal switching device may be a wavelength selective switch (wavelength selective switch, WSS).
  • the optical signal switching apparatus is further configured to configure the value of M according to the number of receivers.
  • the optical signal exchanging device may divide the first optical signal into different numbers of band signals according to different numbers of receivers. For example, when the number M of receivers is 2, the optical signal switching device is used to divide the first optical signal into two band signals of different bands. When the number M of receivers is 4, the optical signal switching device is used to divide the first optical signal into 4 band signals of different bands. Therefore, the present application can improve the flexibility of communication.
  • the N transmitters are further configured to obtain the N first optical signals according to the N first electrical signals.
  • the N first electrical signals are in one-to-one correspondence with the N first optical signals.
  • the N first electrical signals are in one-to-one correspondence with different N electrical physical resources.
  • the N electrophysical resources are N subcarriers. Any two subcarriers in the N subcarriers are orthogonal.
  • the N transmitters are also used to map the N digital electrical signals onto the N subcarriers to obtain N first electrical signals. There is a one-to-one correspondence between the N digital electrical signals and the N subcarriers. Wherein, the crosstalk between signals of the X bands can be reduced by using different sub-carriers, and the reliability of communication can be improved.
  • the N electrophysical resources are N spreading codes. Any two spreading codes among the N spreading codes are orthogonal.
  • the N transmitters are also used to encode the N digital electrical signals by using the N spreading codes to obtain N first electrical signals. There is a one-to-one correspondence between the N digital electrical signals and the N spreading codes. Wherein, the crosstalk between signals of the X bands can be reduced by using different spreading codes, and the reliability of communication can be improved.
  • the N first optical signals are wide-spectrum signals.
  • the optical communication system is a vehicle communication system, a data center system, an Internet of Things system or an industrial interconnection system.
  • the present application provides an optical communication method in a second aspect.
  • the optical communication method includes the following steps: the optical signal switching device receives N first optical signals from N transmitters.
  • the N first optical signals are in one-to-one correspondence with the N transmitters.
  • N is an integer greater than 1.
  • the optical signal switching device divides each first optical signal into X band signals of different bands. Get X ⁇ N band signals. Each of the X band signals carries the same digital electrical signal.
  • the optical signal exchanging device obtains M second optical signals according to the X ⁇ N band signals.
  • M is a positive integer greater than 1.
  • X is an integer greater than 1 and less than or equal to M.
  • the optical signal switching device sends M second optical signals to M receivers.
  • the M second optical signals are in one-to-one correspondence with the M receivers.
  • the wavelength ranges of the N first optical signals are the same.
  • X is equal to M.
  • the optical signal switching device multiplexes the M ⁇ N band signals to obtain M second optical signals.
  • Each second optical signal includes N band signals of different bands.
  • the N band signals are respectively derived from the N first optical signals.
  • the N first optical signals are in one-to-one correspondence with the different N top-tuning signals.
  • the N band signals carry different N top-tuning signals.
  • Each receiver includes a first mapping.
  • the first mapping relationship includes a mapping relationship between N top-tuning signals and N transmitters. The first mapping relationship is used for each receiver to select and modulate the target band signal according to the first mapping relationship.
  • the target band signal is one or more band signals in the N band signals.
  • the N transmitters correspond to different N electrophysical resources.
  • Each receiver includes a second mapping.
  • the second mapping relationship includes a mapping relationship between N electrical physical resources and N transmitters.
  • the N electrophysical resources are in one-to-one correspondence with the N band signals of the second optical signal.
  • the second mapping relationship is used for each receiver to select and mediate the analog electrical signal carried on the target electrophysical resource among the N analog electrical signals according to the second mapping relationship.
  • the target electrophysical resource is one or more electrophysical resources in the N electrophysical resources.
  • the N analog electrical signals are obtained from the N band signals.
  • X is equal to M.
  • the optical signal switching device selectively multiplexes part of the M ⁇ N band signals to obtain M second optical signals.
  • the optical communication method further includes the following step: the optical signal switching device configures the value of M according to the number of receivers.
  • the N first optical signals are obtained according to the N first electrical signals.
  • the N first electrical signals are in one-to-one correspondence with the N first optical signals.
  • the N first electrical signals are in one-to-one correspondence with different N electrical physical resources.
  • the N electrophysical resources are N subcarriers. Any two subcarriers in the N subcarriers are orthogonal.
  • the N electrophysical resources are N spreading codes. Any two spreading codes among the N spreading codes are orthogonal.
  • the N first optical signals are wide-spectrum signals.
  • the optical communication method is applied to a vehicle communication system, a data center system, an Internet of Things system or an industrial interconnection system.
  • the third aspect of the present application provides an optical signal switching device.
  • the optical signal switching device includes a receiving port, a switching module and a sending port.
  • the receiving port is used for receiving N first optical signals from N transmitters.
  • the N first optical signals are in one-to-one correspondence with the N transmitters.
  • N is an integer greater than 1.
  • the switching module is used to divide each first optical signal into X band signals of different bands to obtain X ⁇ N band signals. Each of the X band signals carries the same digital electrical signal.
  • the switching module is also used to obtain M second optical signals according to the X ⁇ N band signals.
  • M is a positive integer greater than 1.
  • X is an integer greater than 1 and less than or equal to M.
  • the sending port is used to send M second optical signals to M receivers.
  • the M second optical signals are in one-to-one correspondence with the M receivers.
  • X is equal to M.
  • the switching module is used for multiplexing the M ⁇ N band signals to obtain M second optical signals.
  • Each second optical signal includes N band signals of different bands.
  • the N band signals are respectively derived from the N first optical signals.
  • the N first optical signals are in one-to-one correspondence with different N top tone signals.
  • the N band signals carry different N top-tuning signals.
  • Each receiver includes a first mapping.
  • the first mapping relationship includes a mapping relationship between N top-tuning signals and N transmitters. The first mapping relationship is used for each receiver to select and modulate the target band signal according to the first mapping relationship.
  • the target band signal is one or more band signals in the N band signals.
  • the N transmitters correspond to different N electrophysical resources.
  • Each receiver includes a second mapping.
  • the second mapping relationship includes a mapping relationship between N electrical physical resources and N transmitters.
  • the N electrophysical resources are in one-to-one correspondence with the N band signals of the second optical signal.
  • the second mapping relationship is used for each receiver to select and mediate the analog electrical signal carried on the target electrophysical resource among the N analog electrical signals according to the second mapping relationship.
  • the target electrophysical resource is one or more electrophysical resources in the N electrophysical resources.
  • the N analog electrical signals are obtained from the N band signals.
  • X is equal to M.
  • the switching module is used to selectively combine some of the M ⁇ N band signals to obtain M second optical signals.
  • the switching module is further configured to configure the value of M according to the number of receivers.
  • the N first optical signals are obtained according to the N first electrical signals.
  • the N first electrical signals are in one-to-one correspondence with the N first optical signals.
  • the N first electrical signals are in one-to-one correspondence with different N electrical physical resources.
  • the N electrophysical resources are N subcarriers. Any two subcarriers in the N subcarriers are orthogonal.
  • the N electrophysical resources are N spreading codes. Any two spreading codes among the N spreading codes are orthogonal.
  • the N first optical signals are wide-spectrum signals.
  • FIG. 1 is a schematic structural diagram of an optical communication system
  • Fig. 2a is the first schematic structural diagram of the optical communication system provided in this application.
  • Figure 2b is a second structural schematic diagram of the optical communication system provided in this application.
  • Fig. 3 is the first schematic structural diagram of the optical signal switching device provided in the present application.
  • FIG. 4 is a second structural schematic diagram of the optical signal exchange device provided in this application.
  • FIG. 5 is a third structural schematic diagram of the optical signal exchange device provided in this application.
  • FIG. 6 is a fourth structural schematic diagram of the optical signal exchange device provided in this application.
  • FIG. 7 is a third structural schematic diagram of the optical communication system provided in this application.
  • FIG. 8 is a fourth structural schematic diagram of the optical communication system provided in this application.
  • FIG. 9 is a fifth structural schematic diagram of the optical communication system provided in this application.
  • FIG. 10 is a schematic flowchart of an optical communication method provided in this application.
  • Fig. 11 is a fifth structural schematic diagram of the optical signal switching device provided in this application.
  • the present application provides an optical communication system, an optical communication method and an optical signal exchange device.
  • the optical signal exchange device divides the first optical signal into X band signals.
  • the optical signal switching device can directly send signals of different bands to different receivers without performing photoelectric conversion. Therefore, the present application can reduce the communication delay between the transmitter and the receiver.
  • first”, “second”, “target” and the like used in this application are only used for the purpose of distinguishing and describing, and cannot be interpreted as indicating or implying relative importance, nor indicating or implying order.
  • reference numerals and/or letters are repeated in the various figures of this application for the sake of brevity and clarity. Repetition does not imply a strictly limited relationship between the various embodiments and/or configurations.
  • the optical communication system in this application can be applied in the field of optical communication.
  • an optical communication system can realize multipoint-to-multipoint communication through multiple switches.
  • each of the multiple switches needs to perform an optical-to-electrical conversion on the optical signal, which results in a high communication delay between the transmitter and the receiver.
  • the optical communication system includes N transmitters, optical signal switching devices and M receivers. Both N and M are integers greater than 1.
  • the receiver and transmitter can be switches, routers, servers, in-vehicle communication modules or optical access devices, etc.
  • Each transmitter is used to send a first optical signal to the optical signal switching device.
  • the optical signal exchange device is used for receiving N first optical signals from N transmitters.
  • the optical signal exchanging device is used for dividing each first optical signal into X waveband signals of different wavebands to obtain X ⁇ N waveband signals. Each of the X band signals carries the same digital electrical signal.
  • X is an integer greater than 1 and less than or equal to M.
  • the optical signal exchanging device is also used to obtain M second optical signals according to the X ⁇ N band signals.
  • the optical signal switching device is used to respectively send a second optical signal to the N transmitters.
  • the M receivers are used to receive M second optical signals from the optical signal switching device.
  • the optical signal exchange device divides the first optical signal into X band signals.
  • the optical signal switching device can directly send signals of different bands to different receivers without performing photoelectric conversion. Therefore, the present application can reduce the communication delay between the transmitter and the receiver.
  • Fig. 2a is a first structural schematic diagram of the optical communication system provided in this application.
  • the optical communication system includes 2 transmitters, an optical signal switching device 200 and 2 receivers.
  • the 2 transmitters include transmitter 201 and transmitter 202 .
  • the 2 receivers include receiver 203 and receiver 204 .
  • the transmitter 201 is configured to send the first optical signal to the optical signal switching device 200 .
  • the transmitter 202 is configured to send another first optical signal to the optical signal switching device 200 .
  • the optical signal switching device 200 is used for receiving two first optical signals from two transmitters.
  • the optical signal switching device 200 is configured to divide each first optical signal into 2 band signals of different bands to obtain 2 ⁇ 2 band signals.
  • the optical signal switching apparatus 200 is configured to divide the first optical signal into two band signals.
  • the two band signals are ⁇ a1 and ⁇ a2 respectively.
  • ⁇ a1 and ⁇ a2 carry the same digital electrical signal.
  • ⁇ a1 and ⁇ a2 carry data a.
  • the optical signal switching apparatus 200 is used to divide another first optical signal into two band signals.
  • the two band signals are ⁇ b1 and ⁇ b2 respectively.
  • ⁇ b1 and ⁇ b2 carry the same digital electrical signal.
  • ⁇ b1 and ⁇ b2 carry data b.
  • each of the 2 ⁇ 2 band signals is a continuous spectrum signal.
  • the wavelength range of ⁇ a1 is 1520 nm (nanometre, nm) ⁇ 1525 nm.
  • the wavelength range of ⁇ a2 is 1525nm ⁇ 1530nm.
  • the wavelength range of the first optical signal is 1520nm ⁇ 1530nm.
  • the first optical signal may not be a continuous spectrum signal.
  • the wavelength ranges of the first optical signal are 1520nm ⁇ 1525nm and 1530nm ⁇ 1535nm.
  • the wavelength range of ⁇ a1 is 1520 nm to 1525 nm.
  • the wavelength range of ⁇ a2 is 1530nm ⁇ 1535nm.
  • each band signal may also be a single-wavelength wavelength signal.
  • Fig. 2b is a second structural schematic diagram of the optical communication system provided in this application. As shown in FIG. 2b, ⁇ a1, ⁇ a2, ⁇ b1 and ⁇ b2 are single-wavelength wavelength signals. For example, the wavelength of ⁇ a1 is 1525 nm. The wavelength of ⁇ a2 is 1530nm.
  • the optical signal switching device 200 is further configured to obtain M second optical signals according to the 2 ⁇ 2 band signals.
  • the second optical signal received by the receiver 203 includes signals in two bands.
  • the two band signals are ⁇ a1 and ⁇ b2 respectively. ⁇ a1 and ⁇ b2 have different band ranges.
  • the receiver 203 has received data a and data b.
  • the second optical signal received by the receiver 204 also includes signals of two bands.
  • the two band signals are ⁇ b1 and ⁇ a2 respectively. ⁇ b1 and ⁇ a2 have different bands.
  • the receiver 204 has received data a and data b.
  • the optical signal switching apparatus 200 may divide the first optical signal into X band signals. Therefore, the first optical signal is an optical signal including X band signals.
  • the optical signal exchanging apparatus 200 is used for receiving a first optical signal including signals of X bands from a receiver.
  • FIG. 3 is a first structural schematic diagram of an optical signal switching device provided in this application.
  • the optical signal switching device 200 includes a demultiplexer 301 , a demultiplexer 302 , a multiplexer 303 and a multiplexer 304 .
  • the demultiplexer 301 is used for receiving the first optical signal from a transmitter (not shown in the figure).
  • the first optical signal includes 2 band signals.
  • the two band signals are ⁇ a1 and ⁇ a2 respectively.
  • the demultiplexer 301 is used to divide the first optical signal into two band signals.
  • the demultiplexer 302 is used to receive another first optical signal from another transmitter (not shown in the figure).
  • Another first optical signal includes 2 band signals.
  • the two band signals are ⁇ b1 and ⁇ b2 respectively.
  • the demultiplexer 302 is used to divide another first optical signal into two band signals.
  • the multiplexer 303 is used to receive ⁇ a1 and ⁇ b2.
  • the multiplexer 303 is used for multiplexing ⁇ a1 and ⁇ b2 to obtain a second optical signal.
  • the multiplexer 303 is used to output the second optical signal to a receiver (not shown in the figure).
  • the multiplexer 303 performs multiplexing in units of one wavelength range.
  • the multiplexer 303 performs multiplexing in units of one or more wavelengths.
  • the multiplexer 304 is used to receive ⁇ b1 and ⁇ a2.
  • the multiplexer 304 is used for multiplexing ⁇ b1 and ⁇ a2 to obtain a second optical signal.
  • the multiplexer 304 is used to output the second optical signal to another receiver (not shown in the figure).
  • the optical signal switching device 200 may also be an arrayed waveguide grating router (arrayed waveguide grating router, AWGR).
  • AWGR arrayed waveguide grating router
  • band signals have the characteristic of loop routing. The loop routing can ensure that there is no band signal of the same band in each second optical signal, thereby reducing beat frequency interference.
  • Fig. 4 is a second structural schematic diagram of the optical signal switching device provided in this application. As shown in FIG. 4 , the optical signal switching device 400 includes a 4 ⁇ 4 AWGR 401.
  • the 4 ⁇ 4 AWGR 401 includes four input ports and four output ports. The four input ports are input ports 1-4 respectively.
  • the four output ports are output ports 1-4 respectively.
  • Each input port is used to receive a first optical signal from the transmitter.
  • the first optical signal received by the input port 1 includes signals of 4 bands.
  • the four band signals are respectively ⁇ a1 ⁇ a4. ⁇ a1 to ⁇ a4 carry the same data a.
  • the first optical signal received by the input port 2 includes signals of 4 bands.
  • the four band signals are ⁇ b1 ⁇ b4 respectively. ⁇ b1 to ⁇ b4 carry the same data b.
  • the first optical signal received by the input port 3 includes signals of 4 bands.
  • the four band signals are ⁇ c1 ⁇ c4 respectively. ⁇ c1 to ⁇ c4 carry the same data c.
  • the first optical signal received by the input port 4 includes signals of 4 bands.
  • the four band signals are respectively ⁇ d1 ⁇ d4. ⁇ d1 to ⁇ d4 carry the same data d.
  • AWGR 401 is used to divide each first optical signal into 4 band signals to obtain 4 ⁇ 4 band signals.
  • AWGR 401 is used to combine 4 ⁇ 4 band signals to obtain 4 second optical signals.
  • the four output ports are used to output four second optical signals.
  • the second optical signal output from the output port 1 includes ⁇ a1, ⁇ b2, ⁇ c3 and ⁇ d4.
  • the second optical signal output from the output port 2 includes ⁇ d1, ⁇ a2, ⁇ b3 and ⁇ c4.
  • the second optical signal output from the output port 3 includes ⁇ c1, ⁇ d2, ⁇ a3 and ⁇ b4.
  • the second optical signal output from the output port 4 includes ⁇ b1, ⁇ c2, ⁇ d3 and ⁇ a4. Therefore, each second optical signal carries data a, data b, data c and data d respectively.
  • each second optical signal does not include signals of the same wavelength band.
  • the AWGR can implement similar functions to the optical signal switching device in FIG. 3 .
  • the two input ports are input port 1 and input port 2 respectively.
  • Input port 1 is used to receive a first optical signal from a transmitter.
  • the first optical signal includes 2 band signals.
  • the two band signals are ⁇ a1 and ⁇ a2 respectively.
  • the input port 2 is used to receive another first optical signal from another transmitter.
  • Another first optical signal includes 2 band signals.
  • the two band signals are ⁇ b1 and ⁇ b2 respectively.
  • the AWGR is used to demultiplex the two first optical signals to obtain 2 ⁇ 2 band signals.
  • the 2 ⁇ 2 band signals are ⁇ a1, ⁇ a2, ⁇ b1 and ⁇ b2, respectively.
  • the AWGR is used for multiplexing 2 ⁇ 2 band signals to obtain 2 second optical signals.
  • the two output ports are output port 1 and output port 2, respectively.
  • the output port 1 is used to output one of the second optical signals.
  • the second optical signal includes ⁇ a1 and ⁇ b1.
  • the output port 2 is used to output another second optical signal.
  • Another second optical signal includes ⁇ b1 and ⁇ a2. Among them, compared with the optical signal exchange device shown in FIG. 3 , the cost of the AWGR is lower, so that the cost of the optical communication system can be reduced.
  • the optical signal switching device 200 may be a combination of a demultiplexer, an optical switch and a multiplexer.
  • the wave splitter is used to divide the N first optical signals into N ⁇ M band signals.
  • the optical switch and the multiplexer are used for selectively multiplexing part of the N ⁇ M band signals to obtain M second optical signals.
  • FIG. 5 is a third structural schematic diagram of an optical signal switching device provided in this application. As shown in FIG. 5 , on the basis of FIG. 3 , the optical signal switching device 200 further includes optical switches 501 - 504 . When the optical switch 501 and the optical switch 502 are in the on state, the second optical signal output by the multiplexer 303 includes ⁇ a1 and ⁇ b2.
  • the second optical signal output by the multiplexer 303 includes ⁇ a1.
  • the second optical signal output by the multiplexer 303 includes ⁇ b2.
  • the optical switches 503 and 504 have similar functions, see the optical transmission path in FIG. 5 for details. Wherein, by adding an optical switch, the band signal of the second optical signal can be flexibly controlled, thereby improving communication security.
  • the optical signal switching device 200 may also be a WSS.
  • the WSS is used to divide the N first optical signals into N ⁇ M band signals.
  • the WSS is used to selectively combine some of the N ⁇ M band signals to obtain M second optical signals.
  • FIG. 6 is a fourth schematic structural diagram of an optical signal switching device provided in this application.
  • the optical signal switching device 200 includes a WSS 601.
  • WSS 601 includes input port 1, input port 2, output port 1 and output port 2.
  • Input port 1 is used to receive a first optical signal from a transmitter.
  • the first optical signal includes 2 band signals.
  • the two band signals are ⁇ a1 and ⁇ a2 respectively.
  • the input port 2 is used to receive another first optical signal from another transmitter.
  • Another first optical signal includes 2 band signals.
  • the two band signals are ⁇ b1 and ⁇ b2 respectively.
  • WSS 601 is used to demultiplex the two first optical signals to obtain 2 ⁇ 2 band signals.
  • the 2 ⁇ 2 band signals are ⁇ a1, ⁇ a2, ⁇ b1 and ⁇ b2, respectively.
  • WSS 601 is used to combine part of the 2 ⁇ 2 band signals to obtain 2 second optical signals.
  • the output port 1 is used to output one of the second optical signals.
  • the second optical signal includes ⁇ a1.
  • the output port 2 is used to output another second optical signal.
  • Another second optical signal includes ⁇ b1 and ⁇ a2.
  • the N transmitters can use light sources that generate the same wavelength band, thereby reducing the later operation and maintenance costs of the optical communication system.
  • the band ranges of ⁇ a1 and ⁇ b1 are the same.
  • ⁇ a2 and ⁇ b2 have the same band range.
  • the band ranges of ⁇ a1 , ⁇ b1 , ⁇ c1 and ⁇ d1 are the same.
  • ⁇ a2, ⁇ b2, ⁇ c2 and ⁇ d2 have the same band range.
  • ⁇ a3, ⁇ b3, ⁇ c3 and ⁇ d3 have the same band range.
  • ⁇ a4, ⁇ b4, ⁇ c4 and ⁇ d4 have the same band range. It should be understood that when the first optical signal is a wavelength signal of a single frequency point, it may be understood that the N first optical signals have the same wavelength band range as that the N first optical signals have the same wavelength.
  • the receiver may receive the second optical signal with signals in multiple bands.
  • the receiver 203 receives the second optical signal having 2 band signals.
  • signals of multiple bands may correspond to different electrical physical resources.
  • the N transmitters are also used to obtain N first optical signals according to the N first electrical signals.
  • the N first electrical signals are in one-to-one correspondence with different N electrical physical resources.
  • the N electrical physical resources may be N subcarriers of different electrical frequencies. Any two subcarriers in the N subcarriers are orthogonal.
  • the optical communication system communicates based on the principle of frequency division multiple access (FDMA).
  • FIG. 7 is a third structural schematic diagram of the optical communication system provided in this application. As shown in FIG. 7 , the optical communication system includes two transmitters, an optical signal switching device 200 and two receivers.
  • the 2 transmitters include transmitter 201 and transmitter 202 .
  • the 2 receivers include receiver 203 and receiver 204 .
  • the transmitter 201 may include a mapping module, a digital-to-analog conversion module and a modulation module.
  • the mapping module is used to map the digital signal a (abbreviated as data a) on the subcarrier P1.
  • the transmitter 201 may first perform constellation mapping processing on the acquired digital signal a. After the constellation mapping process, the transmitter 201 performs frequency shift (also referred to as frequency shift) processing to map the digital signal a on the subcarrier P1.
  • the transmitter 201 may receive raw data from a signal source.
  • the transmitter 201 obtains a digital signal a according to the original data. When the original data is an analog signal, the digital signal a can be obtained by converting the analog signal received from the signal source.
  • the digital signal a may be a digital signal directly output by the signal source.
  • the digital-to-analog conversion module is used to convert the digital signal a mapped on the subcarrier P1 into an analog signal a (also referred to as the first electrical signal).
  • the modulation module is used for receiving the first light beam, and modulating the analog signal a on the first light beam to obtain the first light signal.
  • the first optical signal includes two wavelength band signals ⁇ a1 and ⁇ a2. ⁇ a1 and ⁇ a2 respectively carry data a.
  • the transmitter 202 may include a mapping module, a digital-to-analog conversion module, and a modulation module.
  • the mapping module is used to map the digital signal b (referred to as data b for short) to the subcarrier P2.
  • the digital-to-analog conversion module is used to convert the digital signal b mapped on the subcarrier P2 into an analog signal b (also referred to as the first electrical signal).
  • the modulation module is used for receiving the first light beam, and modulating the analog signal b on the first light beam to obtain the first light signal.
  • the first optical signal includes ⁇ b1 and ⁇ b2. ⁇ b1 and ⁇ b2 carry data b respectively.
  • the optical signal switching device 200 is configured to receive two first optical signals, and obtain two second optical signals according to the two first optical signals.
  • the optical signal switching device 200 is used to output a second optical signal to the receiver 203 .
  • the second optical signal received by the receiver 203 includes ⁇ a1 and ⁇ b2.
  • ⁇ a1 corresponds to subcarrier P1.
  • ⁇ b2 corresponds to subcarrier P2.
  • the optical signal switching device 200 is further configured to output another second optical signal to the receiver 204 .
  • the second optical signal received by the receiver 204 includes ⁇ b1 and ⁇ a2.
  • ⁇ b1 corresponds to subcarrier P2.
  • ⁇ a2 corresponds to subcarrier P1.
  • the receiver 203 and/or the receiver 204 may acquire data in the second optical signal in an active or passive manner.
  • the receiver 203 is taken as an example below to describe this.
  • the optical communication system when the optical signal switching device 200 can control the number of band signals output to the receiver 203, the receiver 203 can passively acquire data in the second optical signal.
  • the optical communication system includes the optical signal switching device shown in FIG. 5 or FIG. 6 .
  • the optical signal switching device 200 cannot control the number of band signals output to the receiver 203
  • the receiver 203 may actively acquire data in the second optical signal.
  • the optical communication system includes the optical signal switching device shown in FIG. 3 or FIG. 4 .
  • the optical communication system may further include a control device.
  • the control device is used to control the band signal output from the optical signal switching device 200 to the receiver 203.
  • the control device is used to control the optical signal switching apparatus 200 to output the second optical signal to the receiver 203 .
  • the second optical signal received by the receiver 203 includes ⁇ a1 and ⁇ b2.
  • the receiver 203 is used to convert the second optical signal into two analog signals.
  • the second optical signal includes ⁇ a1 and ⁇ b2.
  • ⁇ a1 carries data a.
  • ⁇ b2 carries data b. Therefore, the two analog signals include analog signal a and analog signal b.
  • Analog signal a is on subcarrier P1.
  • Analog signal b is on subcarrier P2.
  • the receiver 203 converts the analog signal a into a digital signal a.
  • the receiver 203 converts the analog signal b into a digital signal b.
  • the receiver 203 acquires digital signal a and digital signal b. For example, in FIG.
  • the control device is used to control the optical signal switching apparatus 200 to output the second optical signal to the receiver 203 .
  • the second optical signal includes ⁇ a1.
  • the receiver 203 is used to convert the second optical signal into an analog signal a.
  • the receiver 203 converts the analog signal a into a digital signal a.
  • the receiver 203 acquires the digital signal a.
  • the receiver 203 When the receiver 203 acquires data in the second optical signal in an active manner, the receiver 203 may selectively acquire data of part or all of the band signals in the second optical signal.
  • the optical communication system may further include a control device.
  • the receiver 203 may receive the first mapping relationship or the second mapping relationship from the control device.
  • the receiver 203 selectively acquires data in the second optical signal according to the first mapping relationship or the second mapping relationship.
  • the first mapping relationship includes a mapping relationship between N top-tuning signals and N transmitters.
  • transmitter 201 corresponds to signal 1 tuned-up.
  • the transmitter 201 is also configured to obtain the first optical signal according to the top tune signal 1 .
  • the tune-up signal 1 is a digital signal 1.
  • Digital signal a includes digital signal 1 .
  • the transmitter 201 converts the digital signal 1 into an analog signal 1 .
  • the transmitter 201 modulates the analog signal 1 onto the first optical signal, and outputs the modulated first optical signal.
  • Each band signal in the first optical signal sent by the transmitter 201 includes a top-tuned signal 1 .
  • transmitter 202 corresponds to tone-up signal 2 .
  • the transmitter 202 is also used to obtain the first optical signal according to the top signal 2 .
  • Each band signal in the first optical signal sent by the transmitter 202 includes the top-tuned signal 2 .
  • each band signal corresponds to a top tuning signal.
  • ⁇ a1 corresponds to the pitch signal 1.
  • ⁇ b2 corresponds to the top tuning signal 2.
  • the receiver 203 obtains the digital signal a according to ⁇ a1. If the digital signal a includes the tuned signal 1 , the receiver 203 determines that the digital signal a comes from the transmitter 201 .
  • the receiver 203 obtains the digital signal b according to ⁇ b2.
  • the receiver 203 determines that the digital signal b is from the transmitter 202 . If the receiver 203 only needs to receive data b from the transmitter 202 . Then the receiver 203 can discard the digital signal a. If the receiver 203 needs to receive both the data b from the transmitter 202 and the data a from the transmitter 201 . Then the receiver 203 can acquire digital signal a and digital signal b.
  • the second mapping relationship includes different mapping relationships between N electrical physical resources and N transmitters.
  • transmitter 201 corresponds to electrophysical resource a.
  • the transmitter 202 corresponds to the electrophysical resource b.
  • the electrophysical resource a is a subcarrier P1.
  • the electrophysical resource b is a subcarrier P.
  • the receiver 203 determines that the analog signal a mapped on the subcarrier P1 comes from the transmitter 201 .
  • the receiver 203 determines that the analog signal b mapped on the subcarrier P2 comes from the transmitter 202 . If the receiver 203 only needs to receive data b from the transmitter 202 . Then the receiver 203 can discard the analog signal a.
  • the target electrophysical resource is the subcarrier P2.
  • the receiver 203 needs to receive both the data b from the transmitter 202 and the data a from the transmitter 201 . Then the receiver 203 can obtain the digital signal a and the digital signal b according to the analog signal a and the analog signal b. At this time, the target electrophysical resources are the subcarrier P1 and the subcarrier P2.
  • the N electrophysical resources may be different N code resources.
  • the code resource may be a spreading code, such as a digital spreading code. Any two spreading codes among the N spreading codes are orthogonal.
  • the optical communication system communicates based on the principle of code division multi-access (CDMA).
  • CDMA code division multi-access
  • FIG. 8 is a fourth structural schematic diagram of the optical communication system provided in this application. As shown in FIG. 8 , the optical communication system includes two transmitters, an optical signal switching device 200 and two receivers.
  • the 2 transmitters include transmitter 201 and transmitter 202 .
  • the 2 receivers include receiver 203 and receiver 204 .
  • the transmitter 201 may include a mapping module, an encoding module, a digital-to-analog conversion module and a modulation module.
  • the mapping module is used to map the digital signal a onto subcarriers.
  • the encoding module is used to encode the digital signal a mapped on the subcarrier according to the spreading code Q1 to obtain the spreading digital signal a.
  • the digital-to-analog conversion module is used to convert the spread-spectrum digital signal a into an analog signal a (also referred to as the first electrical signal).
  • the modulation module is used for receiving the first light beam, and modulating the analog signal a on the first light beam to obtain the first light signal.
  • the first optical signal includes ⁇ a1 and ⁇ a2. ⁇ a1 and ⁇ a2 respectively carry data a.
  • the transmitter 202 may also include a mapping module, an encoding module, a digital-to-analog conversion module and a modulation module.
  • the mapping module is used to map the digital signal b onto subcarriers.
  • the encoding module is used to encode the digital signal b mapped on the subcarrier according to the spreading code Q2 to obtain the spreading digital signal b.
  • the digital-to-analog conversion module is used to convert the spread-spectrum digital signal b into an analog signal b (also referred to as the first electrical signal).
  • the modulation module is used for receiving the first light beam, and modulating the analog signal b on the first light beam to obtain the first light signal.
  • the first optical signal includes ⁇ b1 and ⁇ b2. ⁇ b1 and ⁇ b2 carry data b respectively.
  • the optical signal switching device 200 is configured to receive two first optical signals, and obtain two second optical signals according to the two first optical signals.
  • the optical signal switching device 200 is used to output a second optical signal to the receiver 203 .
  • the second optical signal received by the receiver 203 includes ⁇ a1 and ⁇ b2.
  • ⁇ a1 corresponds to the spreading code Q1.
  • ⁇ b2 corresponds to the spreading code Q2.
  • the optical signal switching device 200 is further configured to output another second optical signal to the receiver 204 .
  • Another second optical signal includes ⁇ b1 and ⁇ a2. Among them, ⁇ b1 corresponds to the spreading code Q2.
  • ⁇ a2 corresponds to the spreading code Q1.
  • the receiver 203 may acquire data in the second optical signal in an active or passive manner.
  • the receiver 203 may selectively acquire the data in the second optical signal through the first mapping relationship or the second mapping relationship.
  • each transmitter can obtain the first optical signal by modulating the first light beam.
  • the first beam of light and the first optical signal may be broad spectrum signals.
  • the broad spectrum signal refers to the optical signal whose spectral range occupies more than K nanometers.
  • K may be any value from 1 to 10.
  • the wide spectrum signal can be either a continuous spectrum optical signal or a discrete spectrum signal.
  • a continuous spectrum optical signal has power at each frequency point within the spectral range.
  • Discrete spectral signals only have power in several frequency points or several wavelength ranges in the spectral range.
  • each transmitter may also include a laser.
  • a laser is used to generate the broad spectral first light beam.
  • the laser may be an amplified spontaneous emission (amplified spontaneous emission, ASE) laser.
  • the N transmitters may share one laser.
  • the optical communication system includes an optical splitter.
  • a laser is used to generate the broad spectral first light beam.
  • the beam splitter is used for splitting the broad-spectrum first light beam into N first light beams.
  • a beam splitter is used to output a first light beam to each transmitter.
  • each transmitter may also include a light source module.
  • the light source module includes a distributed feedback (DFB) laser.
  • a DFB laser is used to generate a first light beam with M wavelengths.
  • Each transmitter is used to modulate the first light beam to obtain first optical signals with M wavelengths.
  • the light source module can also include a broadband laser and an optical collection comb.
  • a broad-spectrum laser is used to generate a first light beam with M wavebands.
  • the optical collecting comb is used to obtain the first light beams with M wavelengths according to the first light beams with M wavebands.
  • the wavelength ranges of the N first optical signals are the same, N transmitters may share one light source module.
  • the optical communication system includes an optical splitter.
  • the light source module is used to generate first light beams with M wavelengths.
  • the optical splitter is used to split the first beams of M wavelengths into N first beams.
  • a beam splitter is used to output a first light beam to each transmitter.
  • Each first light beam includes M wavelengths.
  • FIG. 9 is a fifth structural schematic diagram of the optical communication system provided in this application.
  • the optical communication system includes 2 transmitters, an optical signal switching device 900 and 3 receivers.
  • the 2 transmitters include transmitter 901 and transmitter 902 .
  • the 3 receivers include receiver 903 , receiver 904 and receiver 905 .
  • the transmitter 901 is configured to send a first optical signal having signals of three bands to the optical signal switching device 900 .
  • the three band signals are ⁇ a1, ⁇ a2 and ⁇ a3 respectively.
  • ⁇ a1 , ⁇ a2 and ⁇ a3 carry the same digital electrical signal. Assume that ⁇ a1, ⁇ a2, and ⁇ a3 carry data a.
  • the transmitter 902 is configured to send another first optical signal having signals of three bands to the optical signal switching device 900 .
  • the three band signals are ⁇ b1, ⁇ b2 and ⁇ b3 respectively.
  • ⁇ b1, ⁇ b2 and ⁇ b3 carry the same digital electrical signal.
  • ⁇ b1, ⁇ b2 and ⁇ b3 carry data b.
  • the optical signal switching device 900 is used for receiving two first optical signals from two transmitters.
  • the optical signal exchanging device 900 is configured to divide each first optical signal into X band signals to obtain X ⁇ 2 band signals.
  • the optical signal exchanging device 900 is configured to obtain 3 second optical signals according to X ⁇ 2 band signals. In FIG. 9, the value of X is 3.
  • the 3 ⁇ 2 band signals are ⁇ a1, ⁇ a2, ⁇ a3, ⁇ b1, ⁇ b2, and ⁇ b3, respectively.
  • the optical signal switching device 900 sends three second optical signals to three receivers.
  • the second optical signal received by the receiver 903 includes signals of two bands.
  • the two band signals are ⁇ a1 and ⁇ b2 respectively. ⁇ a1 and ⁇ b2 have different band ranges.
  • the receiver 903 has received data a and data b.
  • the second optical signal received by the receiver 904 also includes signals of two bands.
  • the two band signals are ⁇ a2 and ⁇ b3 respectively.
  • the wavelength bands of ⁇ a2 and ⁇ b3 are different.
  • the receiver 904 has received data a and data b.
  • the second optical signal received by the receiver 905 also includes signals of two bands.
  • the two band signals are ⁇ a3 and ⁇ b1 respectively.
  • the wavelength bands of ⁇ a3 and ⁇ b1 are different.
  • the receiver 905 has received data a and data b.
  • X is equal to M. In practical applications, X can be smaller than M. For example, X equals 2.
  • the X ⁇ 2 band signals include ⁇ a5, ⁇ a6, ⁇ b5 and ⁇ b6.
  • the sum of the wavelength ranges of ⁇ a5 and ⁇ a6 is equal to the sum of the wavelength ranges of ⁇ a1, ⁇ a2 and ⁇ a3.
  • the wavelength range of ⁇ a1 in FIG. 9 is 1520 nm ⁇ 1524 nm.
  • the wavelength range of ⁇ a2 is 1524nm ⁇ 1528nm.
  • the wavelength range of ⁇ a3 is 1528nm ⁇ 1532nm.
  • the wavelength ranges of the N first optical signals are the same.
  • the wavelength range of ⁇ a5 may be 1520 nm ⁇ 1526 nm.
  • the wavelength range of ⁇ a6 may be 1526nm ⁇ 1532nm.
  • the sum of the wavelength ranges of ⁇ b5 and ⁇ b6 is equal to the sum of the wavelength ranges of ⁇ b1, ⁇ b2 and ⁇ b3.
  • the wavelength range of ⁇ b5 is the same as that of ⁇ a5.
  • the wavelength range of ⁇ b6 is the same as that of ⁇ a6.
  • the optical signal switching device 900 obtains 3 second optical signals according to the X ⁇ 2 band signals.
  • the second optical signal received by the receiver 903 includes the band signal ⁇ a5. At this time, the receiver 903 has received data a.
  • the second optical signal received by the receiver 904 also includes the band signal ⁇ b6. At this time, the receiver 904 has received data b.
  • the second optical signal received by the receiver 905 also includes signals of two bands. The two band signals are ⁇ b5 and ⁇ a6 respectively. The wavelength bands of ⁇ b5 and ⁇ a6 are different. At this time, the receiver 905 has received data a and data b.
  • the optical signal switching device can configure the value of M according to the number of receivers.
  • X is equal to M
  • the value of X changes as M changes.
  • the 2 receivers include receiver 903 and receiver 904 .
  • the optical signal exchange apparatus 900 can obtain ⁇ a5, ⁇ a6, ⁇ b5, and ⁇ b6 according to the two first optical signals.
  • the second optical signal received by the receiver 903 includes ⁇ a5 and ⁇ b6.
  • the second optical signal received by the receiver 904 includes ⁇ b5 and ⁇ a6.
  • transmitter 901 corresponds to X1.
  • Transmitter 902 corresponds to X2.
  • the value of X1 is 2.
  • the X2 value is 3.
  • the optical signal switching device 900 is used to divide the first optical signal into ⁇ a7 and ⁇ a8.
  • the sum of the wavelength ranges of ⁇ a7 and ⁇ a8 is equal to the sum of the wavelength ranges of ⁇ a1, ⁇ a2 and ⁇ a3.
  • the wavelength range of ⁇ a1 in FIG. 9 is 1520 nm ⁇ 1524 nm.
  • the wavelength range of ⁇ a2 is 1524nm ⁇ 1528nm.
  • the wavelength range of ⁇ a3 is 1528nm ⁇ 1532nm.
  • the wavelength range of ⁇ a7 may be 1520 nm ⁇ 1528 nm.
  • the wavelength range of ⁇ a8 may be 1528nm-1532nm.
  • the optical signal switching device 900 is used to divide another optical signal into ⁇ b1, ⁇ b2 and ⁇ b3.
  • the wavelength range of ⁇ b1 is 1520nm-1524nm.
  • the wavelength range of ⁇ b2 is 1524nm ⁇ 1528nm.
  • the wavelength range of ⁇ b3 is 1528nm ⁇ 1532nm.
  • the optical signal exchange device 900 obtains three second optical signals according to X1 ⁇ 2+X2 ⁇ 2 band signals.
  • the second optical signal received by the receiver 903 includes band signals ⁇ a7 and ⁇ b3.
  • the receiver 903 has received data a and data b.
  • the second optical signal received by the receiver 904 also includes the band signal ⁇ b2.
  • the receiver 904 has received data b.
  • the second optical signal received by the receiver 905 includes band signals ⁇ b1 and ⁇ a8 respectively. At this time, the receiver 905 has received data a and data b.
  • the optical signal switching device may be WSS, AWGR, etc.
  • receiver 904 may receive data in the second optical signal in an active or passive manner.
  • the first optical signal output by the transmitter 901 and the first optical signal output by the transmitter 902 correspond to different electrical physical resources. Electrophysical resources can be subcarriers or spreading codes.
  • FIG. 10 is a schematic flowchart of the optical communication method provided in this application. As shown in Figure 10, the optical communication method in this application includes the following steps.
  • an optical signal switching device receives N first optical signals from N transmitters.
  • Each first optical signal includes M waveband signals of different wavebands.
  • Each of the M band signals carries the same digital electrical signal.
  • the N first optical signals are in one-to-one correspondence with the N transmitters. Both N and M are integers greater than 1.
  • the optical signal switching device obtains M second optical signals according to the N first optical signals.
  • Each second optical signal includes X band signals of different bands.
  • the X band signals are respectively derived from the X first optical signals among the N first optical signals.
  • X is an integer greater than 0 and less than or equal to N.
  • the optical signal exchange device sends M second optical signals to M receivers.
  • the M second optical signals are in one-to-one correspondence with the M receivers.
  • the optical signal switching device may be WSS, AWGR, etc.
  • the optical signal switching device may allow the receiver to acquire data in the second optical signal in an active or passive manner.
  • the optical signal exchange device enables the receiver to receive the data in the second optical signal in an active manner
  • the receiver acquires the data in the second optical signal in a passive manner.
  • the optical signal switching device passively enables the receiver to acquire the data in the second optical signal
  • the receiver actively acquires the data in the second optical signal.
  • the first optical signal output by each transmitter corresponds to different electrical physical resources. Electrophysical resources can be subcarriers or spreading codes.
  • FIG. 11 is a fifth structural schematic diagram of the optical signal switching device provided in this application.
  • an optical signal switching device 1100 includes a receiving port 1101 , a switching module 1102 and a sending port 1103 .
  • the receiving port 1101 is used for receiving N first optical signals from N transmitters.
  • the N first optical signals are in one-to-one correspondence with the N transmitters.
  • N is an integer greater than 1.
  • the switching module 1102 is configured to divide each first optical signal into X band signals of different bands to obtain X ⁇ N band signals. Each of the X band signals carries the same digital electrical signal.
  • the switching module 1102 is further configured to obtain M second optical signals according to the X ⁇ N band signals.
  • M is a positive integer greater than 1.
  • X is an integer greater than 1 and less than or equal to M.
  • the sending port 1103 is used to send M second optical signals to M receivers.
  • the M second optical signals are in one-to-one correspondence with the M receivers.
  • the optical signal switching device may be WSS, AWGR, etc.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Optical Communication System (AREA)

Abstract

L'invention concerne un système de communication optique, appliqué au domaine des communications optiques. Dans le système de communication optique selon l'invention, N émetteurs servent à envoyer N premiers signaux optiques à un appareil de commutation de signaux optiques ; l'appareil de commutation de signaux optiques sert à diviser chaque premier signal optique en X signaux de gamme d'ondes de différentes gammes d'ondes afin d'obtenir X*N signaux de gamme d'ondes, chacun des X signaux de gamme d'ondes transportant le même signal électrique numérique, et X étant un nombre entier supérieur à 1 et inférieur ou égal à M ; l'appareil de commutation de signaux optiques sert également à obtenir M deuxièmes signaux optiques selon les X*N signaux de gamme d'ondes ; et M récepteurs servent à recevoir les M deuxièmes signaux optiques provenant de l'appareil de commutation de signaux optiques. Dans la présente demande, un premier signal optique est divisé en X signaux de gamme d'ondes, de sorte qu'un appareil de commutation de signaux optiques puisse envoyer directement différents signaux de gamme d'ondes à différents récepteurs, sans avoir besoin d'effectuer de conversion optique-électrique, ce qui réduit le retard de communication entre un émetteur et un récepteur.
PCT/CN2022/108550 2021-08-30 2022-07-28 Système et procédé de communication optique, et appareil de commutation de signaux optiques WO2023029831A1 (fr)

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Citations (6)

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JP2016131273A (ja) * 2015-01-13 2016-07-21 富士通株式会社 光伝送システム、波長制御方法、及び、ノード
CN107493523A (zh) * 2017-09-13 2017-12-19 苏州大学 一种全光数据中心网络交换系统
CN109560891A (zh) * 2018-11-16 2019-04-02 烽火通信科技股份有限公司 实现波分复用光信号分路的方法及装置

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CN101466053A (zh) * 2009-01-13 2009-06-24 中兴通讯股份有限公司 一种实现光网络节点的装置和方法
US20160127810A1 (en) * 2014-11-01 2016-05-05 Chin-Tau Lea Asa: a scalable optical switch
US20160191189A1 (en) * 2014-12-30 2016-06-30 Infinera Corporation Wavelength selective switch (wss) based multiplexing architecture
JP2016131273A (ja) * 2015-01-13 2016-07-21 富士通株式会社 光伝送システム、波長制御方法、及び、ノード
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