WO2013121826A1 - Dispositif de communication optique - Google Patents

Dispositif de communication optique Download PDF

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Publication number
WO2013121826A1
WO2013121826A1 PCT/JP2013/050798 JP2013050798W WO2013121826A1 WO 2013121826 A1 WO2013121826 A1 WO 2013121826A1 JP 2013050798 W JP2013050798 W JP 2013050798W WO 2013121826 A1 WO2013121826 A1 WO 2013121826A1
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WO
WIPO (PCT)
Prior art keywords
optical
transmission
level
side optical
unit
Prior art date
Application number
PCT/JP2013/050798
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English (en)
Japanese (ja)
Inventor
創 山崎
Original Assignee
三菱電機株式会社
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Filing date
Publication date
Application filed by 三菱電機株式会社 filed Critical 三菱電機株式会社
Priority to JP2014500128A priority Critical patent/JP5847286B2/ja
Publication of WO2013121826A1 publication Critical patent/WO2013121826A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/29—Repeaters
    • H04B10/291—Repeaters in which processing or amplification is carried out without conversion of the main signal from optical form
    • H04B10/293—Signal power control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
    • H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
    • H04B10/077—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using a supervisory or additional signal
    • H04B10/0777—Monitoring line amplifier or line repeater equipment

Definitions

  • the present invention relates to an optical communication apparatus that communicates an optical signal via a transmission line, and more particularly to an optical communication apparatus having a function of adjusting the level of an optical signal according to a transmission line loss.
  • a wavelength division multiplexing optical communication system is a system capable of multiplexing and transmitting optical signals of different wavelengths on an optical fiber, which is a signal transmission medium, and can greatly increase the transmission capacity with a single optical fiber. It has been put into practical use as a system.
  • a wavelength division multiplexing optical communication system is configured by connecting a plurality of wavelength division multiplexing optical devices (nodes) via optical fibers. Each node can take a connection form such as a point-to-point connection configured in a one-to-one relationship, a linear connection configured linearly, or a ring connection configured in a loop shape.
  • an optical multiplexing / demultiplexing unit that can multiplex, separate or transmit a plurality of optical signals of different wavelengths, a transponder unit that can set a signal from a downstream device to an optical signal of any wavelength, Monitors and controls alarms and performance information between the receiving-side optical amplifier that compensates for loss in the transmission line (optical fiber), the transmitting-side optical amplifier that compensates for the passage loss in the wavelength-multiplexed optical device, and the wavelength-multiplexed optical device There is a supervisory control light unit.
  • the transmission path loss between the nodes usually has various values.
  • the receiving side optical amplifying unit and the transmitting side optical amplifying unit are required to have a wide input dynamic range. It affects the wavelength dependence of gain and the direction in which the noise figure (NF) deteriorates.
  • the output level of the transmission side optical amplifier is made constant and the level before the reception side optical amplifier is set.
  • An adjuster is arranged to adjust the input level of the receiving-side optical amplifier to a level that is the same as when receiving the maximum possible transmission line loss. Therefore, even if the transmission line loss is small, the level adjuster causes an unnecessary loss, and the optical signal-to-noise ratio (OSNR) decreases in proportion to the passing loss of the level adjuster. I will.
  • Patent Document 1 discloses an optical transmission device in which a variable optical coupler capable of changing the branching ratio is arranged in front of the reception side optical amplifier in order to adjust the input level of the reception side optical amplifier. . Since this optical transmission device does not use a variable optical attenuator or the like as a level adjuster, it can reduce the passage loss and suppress the OSNR reduction.
  • the optical transmission device of Patent Document 1 has a problem in that the output energy of the transmission side optical amplifier is wasted because a loss is caused on the reception side when the transmission line loss is small.
  • the optical output level of the transmission-side optical amplifier is high, the influence of nonlinear degradation that occurs in the transmission path becomes large. Therefore, there is a problem that non-linear degradation is unnecessarily caused and the OSNR necessary for reception is also increased.
  • An object of the present invention is to obtain an optical communication apparatus that solves the above problems.
  • An optical communication apparatus includes a transmission-side optical amplifier that amplifies an optical signal, a transmission-side optical amplification unit that outputs an optical signal amplified by the transmission-side optical amplifier to a transmission line, and reception via the transmission line A receiving-side optical amplifier that amplifies the received optical signal, and a control circuit unit that adjusts the optical output level of the transmitting-side optical amplifier so that the optical input level to the receiving-side optical amplifier becomes a predetermined target value.
  • the present invention is configured to adjust the optical output level of the transmission side optical amplifier so that the optical input level to the reception side optical amplifier becomes a predetermined target value, the optical input level to the reception side optical amplifier Can be adjusted to an appropriate level regardless of various transmission line losses, and nonlinear deterioration of the optical signal and OSNR decrease due to unnecessary high-level transmission can be suppressed.
  • 3 is a level diagram of an optical signal according to the first embodiment of the present invention. It is a level division diagram which divided the optical output level and optical input level range concerning Embodiment 1 of this invention into the step. It is a flowchart which shows the adjustment procedure of the optical output level concerning Embodiment 1 of this invention. It is a block diagram which shows the detail of the transmission side optical amplifier of the wavelength multiplexing optical apparatus concerning Embodiment 2 of this invention. It is a block diagram which shows the detail of the transmission side optical amplification part of the wavelength multiplexing optical apparatus concerning Embodiment 3 of this invention.
  • FIG. 1 shows a configuration of a wavelength division multiplexing optical apparatus (optical communication apparatus) according to Embodiment 1 of the present invention.
  • a wavelength multiplexing optical device 1 includes a reception side optical amplification unit 2, an optical multiplexing / demultiplexing unit 3, a transponder unit 4, a transmission side optical amplification unit 5, a transmission side supervisory control light unit 6, and a reception side supervisory control light unit 7. Consists of.
  • the plurality of wavelength division multiplexing optical devices 1 are connected via transmission lines 8 each composed of an optical fiber, and constitute a wavelength division multiplexing optical communication system that transmits a wavelength division multiplexed optical signal obtained by combining a plurality of different wavelengths.
  • the optical level of the optical signal transmitted from the adjacent wavelength multiplexing optical device 1 is lowered due to the loss of the transmission path 8.
  • the receiving side optical amplifying unit 2 has a function of optically amplifying the received optical signal in order to compensate for the loss caused by the transmission path.
  • the optical multiplexing / demultiplexing unit 3 has a function of multiplexing, demultiplexing, or transmitting a plurality of optical signals having different wavelengths, and the divided optical signal is output to the transponder unit 4.
  • the transponder unit 4 extracts an electrical signal from an optical signal having an arbitrary wavelength output from the optical multiplexing / demultiplexing unit 3 and transmits the electrical signal to a downstream device (not shown), and an optical signal having an arbitrary wavelength received from the downstream device And has a function of outputting to the optical multiplexing / demultiplexing unit 3.
  • the optical signal having an arbitrary wavelength output from the transponder unit 4 is combined with the optical signal from the reception side optical amplification unit 2 in the optical multiplexing / demultiplexing unit 3 and output to the transmission side optical amplification unit 5.
  • the transmission side optical amplifying unit 5 has a function of interpolating the loss in the wavelength division multiplexing optical apparatus 1 and optically amplifying the signal to a preset transmission line output level (optical output level).
  • the amplified optical signal is transmitted to the transmission path 8 connected to the adjacent wavelength multiplexing optical device 1.
  • the transmission-side supervisory control light unit 6 connected to the output side of the transmission-side optical amplification unit 5 collects performance information and alarm status of the transmission-side optical amplification unit 5 and notifies them to the adjacent wavelength multiplexing optical device 1
  • the information notified from the adjacent wavelength multiplexing optical device 1 has a function of notifying the transmitting side optical amplifying unit 5 of the information.
  • the reception-side supervisory control light unit 7 connected to the input side of the reception-side optical amplification unit 2 collects performance information and alarm status of the reception-side optical amplification unit 2 and notifies the adjacent wavelength multiplexing optical device 1
  • the function of notifying the receiving side optical amplifying unit 2 of the information notified from the adjacent wavelength multiplexing optical device 1 is provided.
  • FIG. 2 shows the internal configuration of the transmission side optical amplification unit 5 and the reception side optical amplification unit 2.
  • the transmission side optical amplifying unit 5 includes a transmission side optical amplifier 11, an optical output level detection element (output side optical monitor) 12 connected to the output side, an input side level adjuster 13 connected to the input side, and a control.
  • a circuit unit 14 is included.
  • the transmission side optical amplifier 11 optically amplifies the input signal with a predetermined amplification gain.
  • the optical output level detection element 12 monitors the optical output level of the transmission side optical amplifier 11 and notifies the control circuit unit 14 and the transmission side monitoring control light unit 6 of the monitoring result. This optical output level is equal to the optical output level of the transmission side optical amplifying unit 5 transmitted to the transmission line 8.
  • the control circuit unit 14 drives the input side level adjuster 13 to adjust the optical input level of the transmission side optical amplifier 11.
  • the reception side optical amplifying unit 2 includes a reception side optical amplifier 15 and an optical input level detection element (input side optical monitor) 16 connected to the input side thereof.
  • the receiving side optical amplifier 15 optically amplifies the input signal with a predetermined amplification gain.
  • the optical input level detection element 16 monitors the optical input level of the reception side optical amplifier 15 and notifies the reception side monitoring control light unit 7 of the monitoring result.
  • the reception-side monitoring control light unit 7 transmits the optical input level monitoring result to the transmission-side monitoring control light unit 6 via the transmission path 8.
  • the transmission side monitoring control light unit 6 notifies the control circuit unit 14 of the received optical input level monitor result together with the optical output level monitor result notified from the optical output level detection element 12.
  • the input optical signal is level-adjusted by the input side level adjuster 13 and optically amplified by the transmission side optical amplifier 11 with a predetermined amplification gain.
  • the optical output level detection element 12 notifies the control circuit unit 14 of the monitored optical output level (optical output level monitoring result) of the transmission side optical amplifier 11.
  • the control circuit unit 14 controls the input side level adjuster 13 so that the light output level becomes a predetermined reference value at the time of activation.
  • the optical signal whose optical output level is adjusted to the reference value at the time of activation is transmitted from the transmission side optical amplifying unit 5 to the adjacent wavelength division multiplexing optical device 1 through the transmission path 8.
  • the receiving side optical amplifying unit 2 receives an optical signal whose level has been reduced due to a loss caused by the transmission path 8.
  • the optical input level detecting element 16 notifies the receiving side monitoring control light unit 7 of the monitored optical input level to the receiving side optical amplifier 15 as an optical input level monitoring result.
  • the reception side monitoring control light unit 7 transmits the notified optical input level monitoring result to the transmission side monitoring control light unit 6 via the transmission path 8.
  • the transmission side monitoring control light unit 6 notifies the control circuit unit 14 of the received optical input level monitoring result and the optical output level monitoring result notified from the optical output level detection element 12 at the same timing.
  • the control circuit unit 14 follows a preset flow (for example, the flow shown in FIG. 5 to be described later), and the optical input level to the reception-side optical amplifier 15 is a predetermined target according to the notified optical input level monitoring result.
  • the target value of the optical output level of the transmission side optical amplifying unit 5 is determined so as to be a value.
  • the input side level adjuster 13 is controlled to adjust the optical output level of the transmission side optical amplifier 11, that is, the optical output level of the transmission side optical amplification unit 5 to the determined target value.
  • the optical input level to the reception side optical amplifier 15 is adjusted to a prescribed target value.
  • the transmission side monitoring control light unit 6 notifies the control circuit unit 14 of the optical output level monitoring result at the same timing as the optical input level monitoring result on the receiving side, so that the control circuit unit 14 adjusts the light being adjusted. It is possible to avoid erroneous control using the output level monitor result.
  • FIG. 3 shows a level diagram in the wavelength division multiplexing apparatus 1 after the level adjustment by the above operation.
  • (a), (b), (c), and (d) on the horizontal axis correspond to the locations indicated by the same reference numerals in FIG. 2, and (a) shows the transmission side optical amplifier 11 and the transmission side optical amplification unit.
  • (b) shows the input location of the reception side optical amplifier 2
  • (c) shows the input location of the reception side optical amplifier
  • (d) shows the output location of the reception side optical amplifier 15.
  • the vertical axis indicates the light level at each location
  • the light level in (a) indicates the light output level monitoring result monitored by the light output level detection element 12
  • (b) and (c) indicate the light input level detection element 16. Is equal to the result of monitoring the optical input level monitored.
  • the difference between the optical level in (a) and the optical level in (b) is the transmission path loss received in the transmission path 8, and the optical input level to the receiving side optical amplifier 15 becomes a predetermined value.
  • the optical level of (a) that is, the optical output level of the transmission side optical amplification unit 5 is increased, and when the transmission line loss is small, the optical output level of the transmission side optical amplification unit 5 is decreased.
  • FIG. 4 shows an example of a table in which the optical output level of the transmission side optical amplifying unit 5 and the optical input level of the reception side optical amplifier 15 are divided in stages within an adjustable range.
  • the control circuit unit 14 holds values for this step division (table) in advance.
  • the optical output level of the transmission side optical amplifying unit 5 is divided into five stages (a, b, c, d, e), and the optical input level of the reception side optical amplifier 15 is divided into five ranges (AB, B- C, CD, DE, and EF).
  • FIG. 5 shows a light output level adjustment (setting) flowchart when the table shown in FIG. 4 is applied.
  • the reception limit value D is determined based on the number of wavelength division multiplexing optical devices 1 (number of nodes) called nodes included in the system and the receivable level range of the reception side optical amplifier 12. (Target value) is determined and held by the control circuit unit 14.
  • step S1 the control circuit unit 14 controls the input side level adjuster 13 to set the optical output level of the transmission side optical amplifier 11 to the reference value c at the time of activation.
  • the reception-side monitoring control light unit 7 receives the optical input level monitoring result of the reception-side optical amplifier 15 from the optical input level detection element 16, and notifies the transmission-side monitoring control light unit 6 (step S2).
  • the control circuit unit 14 determines the level control amount of the input side level adjuster 13 in the following steps according to the optical input level monitor result notified from the transmission side monitoring control light unit 6.
  • step S3 If the optical input level monitoring result (Rx) is outside the five optical input level ranges (A or higher or F or lower) defined in the table (step S3, Y) in step S3, it is determined that adjustment is impossible. It is necessary to replace the receiving side optical amplifier 15 with a type that falls within the receivable level range (step S4). If the optical input level monitor result is within the optical input level range defined in the table (step S3, N), it is determined whether or not the optical input level monitor result is greater than or equal to B and less than A (step S5). If it is greater than or equal to B and less than A (step S5, Y), the level control amount is determined so as to decrease the optical output level of the transmission side optical amplifier 11 from c to e (step S6).
  • step S5 is negative (N)
  • step S7 it is determined in step S7 whether the input level monitor result is greater than or equal to C and less than B. If it is C or more and less than B (step S7, Y), the level control amount is determined so as to decrease the optical output level of the transmission side optical amplifier 11 from c to d (step S8). If step S7 is negative (N), it is determined in step S9 whether the input level monitor result is greater than or equal to D and less than C. When it is D or more and less than C (step S9, Y), the optical output level of the transmission side optical amplifier 11 is maintained at c (step S10). If step S9 is NO (N), it is determined in step S11 whether the input level monitor result is greater than or equal to E and less than D.
  • step S11, Y If it is greater than or equal to E and less than D (step S11, Y), the level control amount is determined so as to increase the optical output level of the transmission side optical amplifier 11 from c to b (step S12). If step S11 is negative (N), it is confirmed in step S13 that the input level monitor result is F or more and less than E (step S13, Y), and the optical output level of the transmission side optical amplifier 11 is changed from c. The level control amount is determined so as to increase to a (step S14).
  • control circuit unit 14 drives the input side level adjuster 13 to complete the light level adjustment.
  • the transmission side optical amplifying unit receives the notification of the optical input level of the reception side optical amplifier 15 so that the optical input level becomes a predetermined target value. Since the optical output level of 5 is adjusted, the transmission side optical amplification unit 5 does not perform extra optical amplification in accordance with the maximum transmission path loss, and the drive current of the transmission side optical amplification unit 5 is reduced. Therefore, low power consumption can be realized.
  • the receiving side optical amplifying unit 2 does not include a level adjuster that lowers the optical input level in order to correspond to the input dynamic range of the receiving side optical amplifier 15, no extra optical loss occurs and it is necessary. OSNR can be secured.
  • the optical output level can be appropriately adjusted without greatly increasing the input dynamic range of the transmission side optical amplifier 11, so that the optical amplification gain is increased.
  • the wavelength dependency is improved and the transmission performance can be improved.
  • a wavelength division multiplexing optical communication system capable of realizing a long transmission distance can be configured using the wavelength division multiplexing optical device 1.
  • FIG. FIG. 6 shows an internal configuration of the transmission side optical amplifying unit 21 of the wavelength division multiplexing optical apparatus 20 according to the second embodiment of the present invention.
  • the configuration of the wavelength multiplexing optical device 20 is the same as that of the wavelength multiplexing optical device 1 shown in FIG. 1, and the internal configuration of the transmission side optical amplification unit 21 is different from that of the transmission side optical amplification unit 5.
  • the internal configuration of the reception side optical amplifying unit 2 is the same as that in FIG.
  • the transmission side optical amplifier 21 includes a transmission side optical amplifier 11, an output side level adjuster 22 connected to the output side thereof, and an optical output level connected to the output side of the output side level adjuster 22.
  • a detection element (output side optical monitor) 12 and a control circuit unit 14 are included.
  • the transmission side optical amplifier 11 optically amplifies the input signal with a predetermined amplification gain.
  • the optical output level detection element 12 monitors the level of the optical signal level adjusted by the output side level adjuster 22, that is, the optical output level of the transmission side optical amplifying unit 21 transmitted to the transmission line 8, and controls the monitoring result.
  • the circuit unit 14 and the transmission side supervisory control light unit 6 are notified.
  • the control circuit unit 14 drives the output side level adjuster 22 to adjust the optical output level of the transmission side optical amplifying unit 21.
  • the input optical signal is optically amplified with a predetermined amplification gain by the transmission-side optical amplifier 11, and the level is adjusted by the output-side level adjuster 22.
  • the optical output level detection element 12 notifies the control circuit unit 14 of the monitored optical output level (optical output level monitoring result) of the transmission side optical amplifying unit 21.
  • the control circuit unit 14 controls the output side level adjuster 22 so that the light output level becomes a predetermined reference value at the time of activation.
  • the optical signal whose optical output level is adjusted to the reference value at the time of activation is transmitted from the transmission side optical amplifying unit 5 to the adjacent wavelength division multiplexing optical device via the transmission path 8.
  • the receiving side optical amplifying unit 2 receives an optical signal whose level has been reduced due to a loss caused by the transmission path 8.
  • the optical input level detecting element 16 notifies the receiving side monitoring control light unit 7 of the monitored optical input level to the receiving side optical amplifier 15 as an optical input level monitoring result.
  • the reception side monitoring control light unit 7 transmits the notified optical input level monitoring result to the transmission side monitoring control light unit 6 via the transmission path 8.
  • the transmission side monitoring control light unit 6 notifies the control circuit unit 14 of the received optical input level monitoring result and the optical output level monitoring result notified from the optical output level detection element 12 at the same timing.
  • the control circuit unit 14 sets the optical input level to the reception side optical amplifier 15 to a predetermined target value according to the notified optical input level monitoring result.
  • the target value of the optical output level of the transmission side optical amplifying unit 21 is determined.
  • the output side level adjuster 22 is controlled to adjust the optical output level of the transmission side optical amplifying unit 21 to the determined target value.
  • the optical input level to the reception side optical amplifier 15 is adjusted to a prescribed target value.
  • the transmission side monitoring control light unit 6 notifies the control circuit unit 14 of the optical output level monitoring result at the same timing as the optical input level monitoring result on the receiving side, so that the control circuit unit 14 adjusts the light being adjusted. It is possible to avoid erroneous control using the output level monitor result.
  • the transmission side optical amplifying unit receives the notification of the optical input level of the reception side optical amplifier 15 so that the optical input level becomes a predetermined target value. Since the optical output level of the transmission side 21 is adjusted, the transmission side optical amplification unit 21 does not perform extra optical amplification in accordance with the maximum transmission path loss, and the drive current of the transmission side optical amplification unit 21 is reduced. Therefore, low power consumption can be realized.
  • the receiving side optical amplifying unit 2 does not include a level adjuster that lowers the optical input level in order to correspond to the input dynamic range of the receiving side optical amplifier 15, no extra optical loss occurs and it is necessary. OSNR can be secured.
  • the control circuit unit 14 directly uses the optical output level of the output side level adjuster 22 so that the optical output level is adjusted. Since the output side level adjuster 22 is controlled so that the target value is determined, the level adjustment feedback loop configuration is simplified. Further, although the output level of the transmission side optical amplifier 11 is set higher by the passage loss of the output side level adjuster 22, it is not necessary to change the input level of the transmission side optical amplifier 11 in accordance with the transmission line loss. Therefore, there is an effect that the input dynamic range of the transmission side optical amplifier 11 can be set efficiently.
  • a wavelength division multiplexing optical communication system capable of realizing a long transmission distance can be configured using the wavelength division multiplexing optical device 20.
  • FIG. FIG. 7 shows an internal configuration of the transmission side optical amplifying unit 31 of the wavelength division multiplexing apparatus 30 according to the third embodiment of the present invention.
  • the configuration of the wavelength multiplexing optical device 30 is the same as that of the wavelength multiplexing optical device 1 shown in FIG. 1, and the internal configuration of the transmission side optical amplification unit 31 is different from that of the transmission side optical amplification unit 5.
  • the internal configuration of the reception side optical amplifying unit 2 is the same as that in FIG.
  • the transmission side optical amplification unit 31 includes a transmission side optical amplifier 32, an optical output level detection element (output side optical monitor) 12 connected to the output side, and a control circuit unit 14.
  • the transmission side optical amplifier 32 is a variable gain optical amplifier, and optically amplifies an input signal with a set amplification gain.
  • the optical output level detection element 12 monitors the optical output level of the transmission side optical amplifier 32, that is, the optical output level of the transmission side optical amplification unit 31 transmitted to the transmission line 8, and the monitor result is transmitted to the control circuit unit 14 and the transmission side.
  • the monitoring control light unit 6 is notified.
  • the control circuit unit 14 sets and controls the optical amplification gain of the transmission side optical amplifier 32 and adjusts the optical output level of the transmission side optical amplification unit 31.
  • the input optical signal is optically amplified with the amplification gain set by the transmission side optical amplifier 32.
  • the optical output level detecting element 12 notifies the control circuit unit 14 of the monitored optical output level (optical output level monitoring result) of the transmission side optical amplifying unit 31.
  • the control circuit unit 14 sets the optical amplification gain of the transmission side optical amplifier 32 so that the optical output level becomes a predetermined reference value at the time of activation.
  • the optical signal whose optical output level is adjusted to the reference value at the time of activation is transmitted from the transmission side optical amplifying unit 31 to the adjacent wavelength division multiplexing optical device via the transmission path 8.
  • the receiving side optical amplifying unit 2 receives an optical signal whose level has been reduced due to a loss caused by the transmission path 8.
  • the optical input level detecting element 16 notifies the receiving side monitoring control light unit 7 of the monitored optical input level to the receiving side optical amplifier 15 as an optical input level monitoring result.
  • the reception side monitoring control light unit 7 transmits the notified optical input level monitoring result to the transmission side monitoring control light unit 6 via the transmission path 8.
  • the transmission side monitoring control light unit 6 notifies the control circuit unit 14 of the received optical input level monitoring result and the optical output level monitoring result notified from the optical output level detection element 12 at the same timing.
  • the control circuit unit 14 sets the optical input level to the reception side optical amplifier 15 to a predetermined target value according to the notified optical input level monitoring result.
  • the target value of the optical output level of the transmission side optical amplifying unit 31 is determined.
  • the optical amplification gain is set and controlled so that the optical output level of the transmission side optical amplifier 32 becomes the determined target value.
  • the optical input level to the reception side optical amplifier 15 is adjusted to a prescribed target value.
  • the transmission side monitoring control light unit 6 notifies the control circuit unit 14 of the optical output level monitoring result at the same timing as the optical input level monitoring result on the receiving side, so that the control circuit unit 14 adjusts the light being adjusted. It is possible to avoid erroneous control using the output level monitor result.
  • the transmission side optical amplifying unit receives the notification of the optical input level of the reception side optical amplifier 15 so that the optical input level becomes a predetermined target value. Since the optical output level of 31 is adjusted, the transmission side optical amplifying unit 31 does not perform extra optical amplification in accordance with the maximum transmission path loss, and the drive current of the transmission side optical amplifying unit 31 is reduced. Therefore, low power consumption can be realized.
  • the receiving side optical amplifying unit 2 does not include a level adjuster that lowers the optical input level in order to correspond to the input dynamic range of the receiving side optical amplifier 15, no extra optical loss occurs and it is necessary. OSNR can be secured.
  • the transmission side optical amplifier 32 is used as a variable gain optical amplifier and the optical amplification gain is directly controlled, a level adjuster is not required, and the transmission side optical amplification unit 31 can be realized with a simple configuration.
  • the optical amplification gain of the transmission side optical amplifier 31 can be reduced, so that the drive current can be reduced to realize low power consumption.
  • a wavelength division multiplexing optical communication system capable of realizing a long transmission distance can be configured using the wavelength division multiplexing apparatus 30.
  • the optical communication apparatus is configured to adjust the optical output level of the transmission side optical amplifier so that the optical input level to the reception side optical amplifier becomes a predetermined target value.
  • the optical input level can be adjusted to an appropriate level regardless of various transmission line losses, and non-linear degradation of the optical signal and OSNR decrease due to unnecessary high-level transmission can be suppressed. It is suitable for use in a wavelength division multiplexing optical communication system.
  • 1 wavelength multiplexed optical device optical communication device
  • 2 receiving side optical amplifying unit 5 transmitting side optical amplifying unit, 6 transmitting side monitoring control light unit, 7 receiving side monitoring control light unit, 8 transmission path, 11 transmitting side optical amplifier
  • 12 Optical output level detection element output side optical monitor
  • 13 Input side level adjuster 14 Control circuit section, 15 Reception side optical amplifier
  • 16 Optical input level detection element input side optical monitor
  • 20 Wavelength multiplexing optical device Optical communication device

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)

Abstract

La présente invention concerne un dispositif de communication optique qui comporte : une unité d'amplification optique côté émission, qui contient un amplificateur optique côté émission pour amplifier un signal optique, et qui émet, à destination du trajet de transmission, le signal optique amplifié par l'amplificateur optique côté émission ; un amplificateur optique côté réception, qui amplifie le signal optique reçu sur le trajet de transmission ; et une unité de circuit de commande qui ajuste le niveau de sortie optique de l'unité d'amplification optique côté émission de telle sorte que le niveau d'entrée optique au niveau de l'amplificateur optique côté réception prend une valeur cible préréglée.
PCT/JP2013/050798 2012-02-17 2013-01-17 Dispositif de communication optique WO2013121826A1 (fr)

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JP2014500128A JP5847286B2 (ja) 2012-02-17 2013-01-17 光通信装置

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JP2012-033001 2012-02-17
JP2012033001 2012-02-17

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WO2013121826A1 true WO2013121826A1 (fr) 2013-08-22

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2017150417A1 (ja) * 2016-03-04 2018-11-29 日本電気株式会社 通信装置および通信方法

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004509507A (ja) * 2000-09-13 2004-03-25 マルコニ　コミュニケイションズ　リミテッド 光通信システムにおける電力制御方法
JP2006140978A (ja) * 2004-10-15 2006-06-01 Nec Corp 光伝送路損失調整方法、光増幅中継器及び光伝送システム
JP2007025510A (ja) * 2005-07-21 2007-02-01 Fujitsu Ltd 光通信システム及び装置
JP2009267950A (ja) * 2008-04-28 2009-11-12 Mitsubishi Electric Corp 光通信システム及び光通信装置

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2004509507A (ja) * 2000-09-13 2004-03-25 マルコニ　コミュニケイションズ　リミテッド 光通信システムにおける電力制御方法
JP2006140978A (ja) * 2004-10-15 2006-06-01 Nec Corp 光伝送路損失調整方法、光増幅中継器及び光伝送システム
JP2007025510A (ja) * 2005-07-21 2007-02-01 Fujitsu Ltd 光通信システム及び装置
JP2009267950A (ja) * 2008-04-28 2009-11-12 Mitsubishi Electric Corp 光通信システム及び光通信装置

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPWO2017150417A1 (ja) * 2016-03-04 2018-11-29 日本電気株式会社 通信装置および通信方法
US10819690B2 (en) 2016-03-04 2020-10-27 Nec Corporation Communication device and communication method

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