WO2024075219A1 - 光クロスコネクトユニット、光クロスコネクト装置、及び、ノード - Google Patents

光クロスコネクトユニット、光クロスコネクト装置、及び、ノード Download PDF

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Publication number
WO2024075219A1
WO2024075219A1 PCT/JP2022/037295 JP2022037295W WO2024075219A1 WO 2024075219 A1 WO2024075219 A1 WO 2024075219A1 JP 2022037295 W JP2022037295 W JP 2022037295W WO 2024075219 A1 WO2024075219 A1 WO 2024075219A1
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WO
WIPO (PCT)
Prior art keywords
optical
connect
optical fiber
cross
optical cross
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2022/037295
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English (en)
French (fr)
Japanese (ja)
Inventor
千里 深井
宜輝 阿部
ひろし 渡邉
邦明 寺川
紗希 野添
良 小山
友裕 川野
晃弘 黒田
幾太郎 大串
和典 片山
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NTT Inc
Original Assignee
Nippon Telegraph and Telephone Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to PCT/JP2022/037295 priority Critical patent/WO2024075219A1/ja
Priority to PCT/JP2023/006170 priority patent/WO2024075320A1/ja
Priority to JP2024555619A priority patent/JPWO2024075320A1/ja
Publication of WO2024075219A1 publication Critical patent/WO2024075219A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/10—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type
    • G02B6/12—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings of the optical waveguide type of the integrated circuit kind
    • G02B6/122—Basic optical elements, e.g. light-guiding paths
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/46—Processes or apparatus adapted for installing or repairing optical fibres or optical cables
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J14/00—Optical multiplex systems
    • H04J14/02—Wavelength-division multiplex systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04Q—SELECTING
    • H04Q3/00—Selecting arrangements
    • H04Q3/42—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker
    • H04Q3/52—Circuit arrangements for indirect selecting controlled by common circuits, e.g. register controller, marker using static devices in switching stages, e.g. electronic switching arrangements

Definitions

  • the present invention relates to an optical cross-connect unit, an optical cross-connect device, and a node.
  • Non-Patent Document 1 discloses a multi-stage loop network configuration consisting of multiple loops that can easily secure redundant paths as one form of optical access network configuration.
  • Non-Patent Document 2 discloses a configuration in which a node with a core switching function that switches the optical fiber path is installed at the point where two loops meet in a multi-stage loop network in order to meet the demand for optical fiber cores, which are difficult to predict.
  • the core switching function is realized by an optical cross-connect device that switches the signal path.
  • Non-Patent Document 3 discloses a mechanical optical switch that uses a motor to rotate a cylindrical ferrule used in a single-core optical connector, with the aim of using it as an optical cross-connect device that provides a core switching function in an outdoor environment within a multi-stage loop network. With this optical switch, the motor is driven by optical power supply instead of using a commercial power source.
  • the present invention has been made in consideration of the above problems. Its purpose is to provide an optical cross-connect unit, an optical cross-connect device, and a node that can shorten the work time and prevent erroneous connections when configuring an optical cross-connect device using multiple optical switches.
  • an optical cross-connect unit is an optical cross-connect unit that switches the connections of multiple optical fiber cores, and includes an optical switch provided for each optical fiber core, optical wiring paths that connect one of the optical switches to the other optical switches, and an optical switch control unit that controls the drive of the optical switch to connect one of the optical fiber cores to one of the optical wiring paths.
  • An optical cross-connect device includes the optical cross-connect unit described above, and the optical cross-connect unit switches the connection of the optical fiber core between multiple paths having optical fiber cores.
  • a node may include the above-mentioned optical cross-connect device, a port monitoring device that monitors the connection status between the optical fiber cores, and an optical switch control unit provided in the optical cross-connect unit of the optical cross-connect device and a control unit that controls the port monitoring device.
  • the work time can be shortened and erroneous connections can be prevented.
  • FIG. 1 is a diagram showing an example of the configuration of a node according to an embodiment of the present invention.
  • FIG. 2 is a diagram showing a first configuration example of an optical cross-connect device according to an embodiment of the present invention.
  • FIG. 3 is a diagram showing an example of the configuration of an optical cross-connect unit included in the optical cross-connect device of FIG.
  • FIG. 4 is a diagram showing a second example of an optical cross-connect device according to an embodiment of the present invention.
  • FIG. 5 is a diagram showing an example of the configuration of an optical cross-connect unit included in the optical cross-connect device of FIG.
  • Node configuration] 1 is a diagram showing an example of the configuration of a node according to this embodiment. As shown in FIG. 1, the node 1 includes an optical cross-connect device 200, a port monitoring device 600, and a control unit 500.
  • the optical cross-connect device 200 and the port monitoring device 600 can be fusion-spliced to the multiple optical fiber cores included in the optical fiber core group 100 using a pre-installed optical fiber pigtail (not shown). Also, in the optical cross-connect device 200 and the port monitoring device 600, a connector (not shown) may be installed on the optical fiber pigtail. Furthermore, a connector (not shown) may be installed on the multiple optical fiber cores included in the optical fiber core group 100. In this way, connections using connectors may be made between the optical fiber core group 100, the optical cross-connect device 200, and the port monitoring device 600.
  • FIG. 2 is a diagram showing a first configuration example of the optical cross-connect device according to the present embodiment.
  • the optical cross-connect device 200 may be configured by arranging a plurality of optical cross-connect units 21.
  • the optical cross-connect unit 21 to which a built-in module such as an optical switch is fixed may be prepared in advance in a factory or the like, and the optical cross-connect unit 21 may be brought to the installation site of the node 1, such as inside a manhole or on a utility pole, and attached to the optical cross-connect device 200 of the node 1.
  • the optical fiber core group 100 includes eight optical fiber cores, and the eight optical fiber cores are shown configuring four paths 100A, 100B, 100C, and 100D.
  • two optical cross-connect units 21 are arranged according to the number of optical fiber cores that configure each path.
  • this embodiment is not limited to this.
  • the number of optical cross-connect units 21 may be adjusted according to the number of optical fiber cores to be switched among the optical fiber cores included in the optical fiber core group 100.
  • the optical cross connect unit 21 may use a pigtail or a receptacle installed in the housing of the optical cross connect unit 21 to connect to the optical fiber cores included in the optical fiber core group 100.
  • the optical cross connect unit 21 may be provided with a multi-core optical connector as a connection form for the optical fiber cores, and may be connected to the optical fiber core group 100 via the multi-core optical connector.
  • the multi-core optical connector of this embodiment may be an MT connector, also known as an F12-type multi-core optical fiber connector.
  • the optical fiber core wire to be attached to the MT connector is adhesively fixed into the optical fiber insertion hole of the MT ferrule, and the connection end face of the core wire is polished at a right angle.
  • the optical fiber core wire may be provided in a pigtail.
  • the MT connector has a refractive index matching agent filled between the end faces, and is connected by inserting a guide pin attached to one MT ferrule into the guide pin hole of the other MT ferrule and fitting the MT ferrules together.
  • an MPO connector also known as an F13 type multi-core optical fiber connector
  • the end face of the MT ferrule is polished at an angle
  • the MT ferrule is built into the MPO plug housing
  • the MPO plug is connected inside the MPO adapter.
  • the multi-core optical connector is not limited to MT connectors and MPO connectors, as long as it can connect multiple optical fiber cores together in a detachable manner.
  • Fig. 3 is a diagram showing a configuration example of an optical cross connect unit included in the optical cross connect device of Fig. 2.
  • the optical cross connect unit 21 includes optical switches 23A, 23B, 23C, and 23D, connection units 25A, 25B, 25C, and 25D, an optical wiring path 29, and optical switch control units 26A, 26B, 26C, and 26D.
  • the optical cross connect unit 21 may have a board or a housing, and include the optical switches 23A, 23B, 23C, and 23D, connection units 25A, 25B, 25C, and 25D, the optical wiring path 29, and the optical switch control units 26A, 26B, 26C, and 26D on the board or in the housing.
  • Optical switches 23A, 23B, 23C, and 23D are provided in optical fiber cores 22A, 22B, 22C, and 22D, respectively.
  • Optical switches 23A, 23B, 23C, and 23D are connected to connection parts 25A, 25B, 25C, and 25D via optical fiber groups 24A, 24B, 24C, and 24D.
  • Optical wiring path 29 is composed of optical paths that connect the optical fiber cores of optical fiber groups 24A, 24B, 24C, and 24D to the optical fiber cores of optical fiber groups 24A, 24B, 24C, and 24D of other connection parts at connection parts 25A, 25B, 25C, and 25D, respectively.
  • the optical switch control units 26A, 26B, 26C, and 26D drive the optical switches to connect the optical fiber cores 22A, 22B, 22C, and 22D to each of the optical fiber groups 24A, 24B, 24C, and 24D.
  • the optical switches 23A, 23B, 23C, and 23D, the connection parts 25A, 25B, 25C, and 25D, the optical switch control parts 26A, 26B, 26C, and 26D, and the optical wiring path 29 are fixed and arranged in advance at a factory or the like.
  • the optical fiber cores 22A, 22B, 22C, and 22D are connected to the optical fiber cores included in the paths 100A, 100B, 100C, and 100D shown in FIG. 2, respectively.
  • the optical cross-connect unit 21 switches the connections of the multiple optical fiber cores 22A, 22B, 22C, and 22D.
  • the optical cross-connect unit 21 switches the connections of the optical fiber cores included in the paths 100A, 100B, 100C, and 100D.
  • the optical wiring path 29 is composed of three parallel optical fibers for each connection section.
  • the number of routes is N and the number of optical fiber cores to be connected by the optical cross-connect unit 21 for each route is M
  • the number of optical fibers in the optical fiber groups 24A, 24B, 24C, and 24D connected to the connections 25A, 25B, 25C, and 25D, respectively, and the number of optical fibers in the optical wiring path 29 for each connection section are (N-1) x M.
  • the number of optical fibers in the optical fiber groups 24A, 24B, 24C, and 24D, and the number of optical fibers in the optical wiring path 29 for each connection section are each three.
  • connection parts 25A, 25B, 25C, and 25D of this embodiment connect the optical fiber groups 24A, 24B, 24C, and 24D to the optical wiring path 29, for example, by fusion splicing.
  • MT connectors also known as F12-type multi-core optical fiber connectors
  • the optical fiber to be attached to the MT connector is glued and fixed in the optical fiber insertion hole of the MT ferrule, and the connection end face of the core wire is polished at a right angle.
  • the optical fiber may be provided as a pigtail from optical switches 23A, 23B, 23C, and 23D.
  • the MT connectors are connected by filling the end faces with a refractive index matching agent, and inserting a guide pin attached to one MT ferrule into the guide pin hole of the other MT ferrule and fitting the MT ferrules together.
  • the connecting parts 25A, 25B, 25C, and 25D may use an MPO connector, also known as an F13 type multi-core optical fiber connector.
  • MPO connector also known as an F13 type multi-core optical fiber connector.
  • the end face of the MT ferrule is polished at an angle, the MT ferrule is built into the MPO plug housing, and the MPO plug is connected inside the MPO adapter.
  • the optical wiring path 29 may be composed of optical fiber wound and arranged with a bend that does not cause signal degradation due to bending loss.
  • the optical fiber when using a single mode optical fiber in which bending loss does not increase with a bend of 60 mm diameter, the optical fiber is wound and arranged with a diameter of 60 mm or more.
  • the optical wiring path 29 can be composed of an optical fiber harness. By using an optical fiber harness, it is possible to prevent failure factors such as tangling of the optical fiber core wires or unintentional sudden bending.
  • optical wiring path 29 instead of configuring the optical wiring path 29 using optical fibers, it may be configured using optical waveguides that achieve an equivalent connection relationship. By using optical waveguides, the overall size of the optical cross-connect unit 21 can be reduced.
  • the optical fiber core 22A is connected to one of the optical fibers that make up the optical fiber group 24A.
  • Such switching of the optical path may be achieved by mechanically butting or unbuttoning the optical paths without converting the optical signal into an electrical signal.
  • connection control may be based on a control signal. Note that while the optical switch 23A has been described here, the same applies to the other optical switches 23B, 23C, and 23D.
  • optical switch 23A, 23B, 23C, and 23D The above example is a configuration in which 1x3 optical switches are used as optical switches 23A, 23B, 23C, and 23D, but this embodiment is not limited to this example. For example, four or more optical switches may be arranged. Also, while the optical switch control units 26A, 26B, 26C, and 26D have been described as being provided for each of the optical switches 23A, 23B, 23C, and 23D, this is not limited to this. For example, four optical switches may be driven by one optical switch control unit.
  • the arrangement of the optical fibers may be one-dimensional.
  • the optical cross-connect unit 21 switches one optical fiber core in each of the four directions, four optical fibers are arranged in a single horizontal row at the end face of the multi-core optical connector.
  • Fig. 4 is a diagram showing a second example of the optical cross-connect device according to the present embodiment.
  • the optical cross-connect device 200 may include an optical cross-connect unit 31 instead of the multiple optical cross-connect units 21 shown in Fig. 2.
  • the optical cross-connect unit 31 to which a built-in module such as an optical switch is fixed may be prepared in advance in a factory or the like, and the optical cross-connect unit 31 may be brought to the installation site of the node 1, such as inside a manhole or on a utility pole, and attached to the optical cross-connect device 200 of the node 1.
  • the optical fiber core group 100 includes eight optical fiber cores as in FIG. 2, and the eight optical fiber cores are shown configuring four paths 100A, 100B, 100C, and 100D.
  • the optical cross connect unit 31 is connected to the optical fiber cores configuring the paths 100A, 100B, 100C, and 100D. Note that this embodiment is not limited to this.
  • the number of optical cross connect units 21 or optical cross connect units 31 may be adjusted according to the number of optical fiber cores to be switched among the optical fiber cores included in the optical fiber core group 100.
  • the optical cross connect device 200 may include the optical cross connect unit 21 together with the optical cross connect unit 31.
  • the optical cross connect unit 31 may use a pigtail or a receptacle installed in the housing of the optical cross connect unit 31 to connect to the optical fiber cores included in the optical fiber core group 100. Furthermore, the optical cross connect unit 31 may be provided with a multi-core optical connector that bundles the optical fiber cores to be connected to the optical cross connect unit 31, and may be connected to the optical fiber cores via the multi-core optical connector.
  • Fig. 5 is a diagram showing a configuration example of an optical cross connect unit included in the optical cross connect device of Fig. 4.
  • the optical cross connect unit 31 includes optical switches 33A to 33H, connection units 35A to 35H, an optical wiring path 39, and an optical switch control unit (not shown).
  • the optical cross connect unit 31 may have a board or a housing, and include the optical switches 33A to 33H, connection units 35A to 35H, the optical wiring path 39, and the optical switch control unit on the board or in the housing.
  • the optical switches 33A to 33H are provided on the optical fiber core wires connected to the optical fiber core wire group 100.
  • the optical switches 33A to 33H are connected to the connection units 35A to 35H via a plurality of optical fibers provided in the optical switches 33A to 33H, respectively.
  • the optical wiring path 39 is composed of optical paths that connect the optical fibers of each optical fiber group provided in the optical switches 33A to 33H to the optical fibers of the optical fiber groups of the other connection units in the connection units 35A to 35H.
  • the optical switch control unit drives the optical switch to connect the optical fiber core wire connected to the optical fiber core wire group 100 to one of the optical fibers of the optical fiber groups between the optical switches 33A to 33H and the connection units 35A to 35H.
  • the optical switches 33A-33H, the connection units 35A-35H, the optical wiring path 39, and the optical switch control unit are fixed and arranged in advance at a factory or the like.
  • the optical cross-connect unit 31 switches the connections of multiple optical fiber cores, thereby switching the connections of the optical fiber cores included in the paths 100A, 100B, 100C, and 100D.
  • the number of routes is N and the number of optical fiber cores to be connected by the optical cross-connect unit 31 for each route is M
  • the number of optical fibers in the optical fiber groups connected to the connection units 35A-35H, respectively, and the number of optical fibers in the optical wiring path 39 for each connection unit will be (N-1) x M.
  • connection parts 35A to 35H connect the optical wiring path 39 using, for example, fusion.
  • configuration of the connection parts 35A to 35H can be the same as that of the connection parts 25A to 25D.
  • optical wiring path 39 instead of configuring the optical wiring path 39 using optical fibers, it may be configured using optical waveguides that achieve an equivalent connection relationship. By using optical waveguides, the overall size of the optical cross-connect unit 31 can be reduced.
  • optical switches 33A to 33H can have the same configuration as the optical switches 23A to 23D.
  • the above example is a configuration in which 1x6 optical switches are used as the optical switches 33A-33H, but this embodiment is not limited to this example.
  • eight or more optical switches may be arranged.
  • an optical switch control unit may be provided for each of the optical switches 33A-33H, or one optical switch control unit may drive eight optical switches.
  • the arrangement of the optical fibers may be one-dimensional.
  • the optical cross-connect unit 31 switches between two optical fibers in each of the four directions, eight optical fibers are arranged in a horizontal row at the end face of the multi-core optical connector.
  • the optical fibers may be arranged two-dimensionally.
  • eight optical fibers may be arranged in two horizontal rows of four cores each.
  • the optical cross-connect unit of this embodiment is an optical cross-connect unit that switches the connections of multiple optical fiber cores, and includes an optical switch provided for each optical fiber core, optical wiring paths that connect one of the optical switches to the other optical switches, and an optical switch control unit that controls the drive of the optical switch to connect one of the optical fiber cores to one of the optical wiring paths.
  • Optical switches that can switch one optical fiber core to one of multiple other paths can be placed in each path.
  • a connection section that connects the optical fiber cores between the optical switches so that they are interconnected in advance, it is possible to prevent incorrect connections when installing optical cross-connect equipment outdoors.
  • aligning the optical fiber cores at the connection section in the optical wiring path it is possible to provide a more compact optical cross-connect unit.
  • the optical cross-connect unit may further include a connection section that connects the optical fibers provided for each optical switch, and the optical wiring path may connect one of the connection sections to the other connection sections.
  • the optical cross-connect unit according to this embodiment may further include a multi-core optical connector that bundles the optical fiber cores. This makes it possible to quickly connect multiple optical switches together without making erroneous connections when configuring an optical cross-connect device.
  • the optical fiber cores to be connected can be arranged in a single horizontal row at the end face of the multi-core optical connector.
  • the multi-core optical connector may be of the push-pull type.
  • MPO connector to the optical cross-connect unit, it becomes possible to connect the optical fiber cores in a short time by installing the MPO connector in advance on the optical fiber cable to be connected. It also makes it possible to eliminate the need for special devices and tools for connecting optical fiber cores, such as a fusion splicer.
  • the optical wiring path may be configured by an optical fiber harness.
  • an optical fiber harness to configure the optical wiring path, it is possible to prevent failure factors such as tangling of the optical fiber core wires or unintentional sudden bending.
  • the optical wiring path may be configured by an optical waveguide.
  • the optical cross-connect device may include the optical cross-connect unit described above, and the optical cross-connect unit may switch the connection of the optical fiber core between multiple paths having optical fiber cores. This can shorten the work time and prevent erroneous connections when configuring an optical cross-connect device using multiple optical switches.
  • the node according to this embodiment may include the above-mentioned optical cross connect device, a port monitoring device that monitors the connection status between the optical fiber cores, and a node control unit that controls the optical cross connect device and the port monitoring device.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Signal Processing (AREA)
  • Optical Communication System (AREA)
PCT/JP2022/037295 2022-10-05 2022-10-05 光クロスコネクトユニット、光クロスコネクト装置、及び、ノード Ceased WO2024075219A1 (ja)

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Application Number Priority Date Filing Date Title
PCT/JP2022/037295 WO2024075219A1 (ja) 2022-10-05 2022-10-05 光クロスコネクトユニット、光クロスコネクト装置、及び、ノード
PCT/JP2023/006170 WO2024075320A1 (ja) 2022-10-05 2023-02-21 光配線ユニット、光クロスコネクトユニット、光クロスコネクト装置、及びノード
JP2024555619A JPWO2024075320A1 (https=) 2022-10-05 2023-02-21

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PCT/JP2022/037295 WO2024075219A1 (ja) 2022-10-05 2022-10-05 光クロスコネクトユニット、光クロスコネクト装置、及び、ノード

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PCT/JP2023/006170 Ceased WO2024075320A1 (ja) 2022-10-05 2023-02-21 光配線ユニット、光クロスコネクトユニット、光クロスコネクト装置、及びノード

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Citations (1)

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JP2011043771A (ja) * 2009-08-24 2011-03-03 Fujikura Ltd 光マトリクススイッチの制御装置、光マトリクススイッチの制御用プログラム、及び制御方法

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JP3326403B2 (ja) * 1999-03-30 2002-09-24 株式会社巴川製紙所 光学接続部品
JP2002372642A (ja) * 2001-06-18 2002-12-26 Fuji Xerox Co Ltd 光配線基板及び光配線基板積層体
JP3844991B2 (ja) * 2001-10-22 2006-11-15 富士通株式会社 光配線接続構造
JP3858683B2 (ja) * 2001-12-17 2006-12-20 凸版印刷株式会社 多層光配線及びその製造方法
JP2008076703A (ja) * 2006-09-21 2008-04-03 Fujikura Ltd 多層光ファイバシート
JP2012013726A (ja) * 2010-06-29 2012-01-19 Hitachi Ltd 光インターコネクションモジュールおよびそれを用いた光電気混載回路ボード
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JP2011043771A (ja) * 2009-08-24 2011-03-03 Fujikura Ltd 光マトリクススイッチの制御装置、光マトリクススイッチの制御用プログラム、及び制御方法

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HIROSHI WATANABE, TOMOHIRO KAWANO, CHISATO FUKAI, RYO KOYAMA, KAZUHIDE NAKAE, TATSUYA FUJIMOTO, YOSHITERU ABE, KAZUNORI KATAYAMA : "Remote Operated Optical Fiber Switching Node and Optical Cross-Connect Function on Concatenated Loop Topology", IEICE TECHNICAL REPORT, OFT, IEICE, JP, vol. 121, no. 332 (OFT2021-62), 13 January 2022 (2022-01-13), JP, pages 36 - 41, XP009553844 *

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