WO2022162858A1 - 光クロスコネクト装置 - Google Patents
光クロスコネクト装置 Download PDFInfo
- Publication number
- WO2022162858A1 WO2022162858A1 PCT/JP2021/003164 JP2021003164W WO2022162858A1 WO 2022162858 A1 WO2022162858 A1 WO 2022162858A1 JP 2021003164 W JP2021003164 W JP 2021003164W WO 2022162858 A1 WO2022162858 A1 WO 2022162858A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- optical
- cross
- paths
- connect device
- switches
- Prior art date
Links
- 230000003287 optical effect Effects 0.000 title claims abstract description 194
- 239000013307 optical fiber Substances 0.000 claims abstract description 23
- 230000001174 ascending effect Effects 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 abstract description 10
- 238000010586 diagram Methods 0.000 description 11
- 230000003068 static effect Effects 0.000 description 2
- 239000000470 constituent Substances 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Images
Classifications
-
- 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
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/35—Optical coupling means having switching means
- G02B6/3502—Optical coupling means having switching means involving direct waveguide displacement, e.g. cantilever type waveguide displacement involving waveguide bending, or displacing an interposed waveguide between stationary waveguides
- G02B6/3504—Rotating, tilting or pivoting the waveguides, or with the waveguides describing a curved path
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B26/00—Optical devices or arrangements for the control of light using movable or deformable optical elements
- G02B26/08—Optical devices or arrangements for the control of light using movable or deformable optical elements for controlling the direction of light
-
- 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
- G02B6/02—Optical fibres with cladding with or without a coating
- G02B6/02042—Multicore optical fibres
-
- 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
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/35—Optical coupling means having switching means
- G02B6/354—Switching arrangements, i.e. number of input/output ports and interconnection types
- G02B6/3554—3D constellations, i.e. with switching elements and switched beams located in a volume
- G02B6/3556—NxM switch, i.e. regular arrays of switches elements of matrix type constellation
-
- 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
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/35—Optical coupling means having switching means
- G02B6/354—Switching arrangements, i.e. number of input/output ports and interconnection types
- G02B6/3554—3D constellations, i.e. with switching elements and switched beams located in a volume
- G02B6/3558—1xN switch, i.e. one input and a selectable single output of N possible outputs
Definitions
- the present disclosure relates to an optical cross-connect device that switches paths of optical lines using optical fibers.
- An economical rotary optical switch that does not require collimators, lenses, etc., has been proposed by mounting an optical fiber having a plurality of optical paths on a rotating body and rotating the rotating body with an actuator (for example, patent Reference 1). By further connecting a plurality of these to each other and using them, an optical cross-connect device having m ⁇ n (m and n are natural numbers of 2 or more) or n ⁇ n route switching can be configured.
- an optical cross-connect device having m ⁇ n (m and n are natural numbers of 2 or more) or n ⁇ n route switching can be configured.
- the optical fiber tape core wires in which a plurality of optical fibers are integrated so that the optical fibers are aligned radially on the end surface of the rotating body, it is possible to collectively switch the optical fiber tape core wires. .
- An object of the present disclosure is to reduce the transmission loss deviation between ports in an optical cross-connect device using a rotary optical switch.
- the optical cross-connect device of the present disclosure is An optical cross-connect device in which optical switches for switching a plurality of optical paths using optical fibers are connected to each other by optical paths, wherein the optical switch collectively switches the plurality of optical paths using a rotating body;
- the optical paths connecting the optical switches to each other include an optical path having a large loss in the optical switch, which is one of the plurality of optical paths switched collectively, and the other optical path of the plurality of optical paths switched collectively. and a cross-wiring section for connecting the optical path with a small loss in the optical switch.
- an optical cross-connect device having a plurality of rotary optical switches that switch optical paths by rotating a rotator having a plurality of optical paths
- a plurality of optical paths having different distances from the center of the rotator are provided. Since the loss difference can be reduced, the transmission loss deviation between ports can be reduced, and the maximum transmission loss can be reduced.
- FIG. 1 is a block diagram showing an optical cross-connect device according to an embodiment of the present disclosure
- FIG. 1 is a configuration diagram of a 1 ⁇ N rotary optical switch according to an embodiment of the present disclosure
- FIG. 4 is a configuration diagram showing a cross section of a ferrule in which multiple optical paths are mounted according to an embodiment of the present disclosure
- FIG. 4 is a configuration diagram showing a cross section of a ferrule in which multiple optical paths are mounted according to an embodiment of the present disclosure
- FIG. 5 is a diagram showing an example of the relationship between static angle accuracy and excess loss due to rotational deviation.
- FIG. 4 is a diagram showing a cross wiring portion between optical switches according to an embodiment of the present disclosure
- FIG. 1 is a block configuration diagram showing an optical cross-connect device according to an embodiment of the present disclosure.
- N is a natural number of 1 to 4
- rotary optical switches S1 and a plurality of N ⁇ 1 rotary optical switches S1 whose directions are bilaterally symmetrical are arranged on the input and output sides.
- N is a natural number from 1 to 4
- N may be any number of input/output paths and is not limited to this.
- the number of input/output paths is not the same, and by changing the rotary optical switch and its wiring, it is possible to implement an optical cross-connect device having an asymmetrical number of input/output paths.
- the input and the output are wired to each other (S3) in the figure, the 1.times.N rotary optical switches S1 on the input side may be wired to each other. That is, the present disclosure may be configured to pass through at least two 1 ⁇ N rotary optical switches S1 on the optical path.
- each component function of the optical cross-connect device shown in the figure will be described.
- FIG. 2 is a configuration diagram of a 1 ⁇ N rotary optical switch S1 according to an embodiment of the present disclosure.
- the 1 ⁇ N rotary optical switch has a plurality of optical paths S2-x (x is a natural number of 1 to 4) as one input path, and has a cylindrical outer diameter of is mounted on the ferrule S27.
- a plurality of optical paths S3N-x are provided as one path, and this is provided as an output path of N paths, and is mounted on a ferrule S28 similarly having a cylindrical outer diameter.
- One of the two ferrules is given a rotational motion S29 to the other, thereby imparting a rotational motion to the ferrule S28 at every arbitrary rotation angle step, thereby switching a plurality of optical paths at once. characterized by
- the optical path S2-x is connected to the optical path S31-x.
- the rotary optical switch S1 is the rotary optical switch S1-11 shown in FIG. 1 and the optical path S31-x is connected to the rotary optical switch S1-12 shown in FIG.
- the optical path S2-x connected to the rotary optical switch S1-11 can be connected to the optical path S2-x connected to the rotary optical switch S1-12.
- the optical path S2-x is connected to the optical path S32-x.
- the rotary optical switch S1 is the rotary optical switch S1-11 shown in FIG. 1 and the optical path S32-x is connected to the rotary optical switch S1-22 shown in FIG.
- the optical path S2-x connected to the rotary optical switch S1-11 can be connected to the optical path S2-x connected to the rotary optical switch S1-22.
- 3 and 4 are configuration diagrams showing cross sections of the ferrule S27 and ferrule S28, respectively, when the plurality of optical paths S2-x and S3N-x are mounted on the ferrule S27 and ferrule S28, respectively.
- the ferrule S27 has four different core arrangement radii S9-x, which are distances from the central axis when the center of the ferrule is the central axis, S9-1, S9-2, and S9-x from the central axis. 3, S9-4 in ascending order, and the optical path S2-x is similarly set in ascending order from the central axis to S2-1, S2-2, S2-3, S2-4 at the same rotation angle. are placed.
- N sets of optical paths S3N-x are arranged concentrically with the core arrangement radius S9-x for each rotation angle.
- S3N-4 are arranged in ascending order.
- an optical fiber having a plurality of cores in one clad such as a multi-core optical fiber, may be used, or a plurality of cores may be provided in the ferrule.
- a plurality of optical fibers having a single core may be mounted at a location provided with an optical fiber conduction hole.
- multi-core optical fibers may be employed, and the cores of the multi-core optical fibers may be coupled together.
- the present disclosure allows both of the two rotating bodies to be ferrules or multi-core optical fibers.
- FIG. 5 is a diagram showing the relationship of excess loss due to rotation angle deviation to stationary angle accuracy in optical path rotation.
- Excess loss T R (unit: dB) due to rotational angle deviation in each optical path is determined by core arrangement radius R (unit: ⁇ m), stationary angle accuracy ⁇ (unit: degree) in optical path rotation, input side and output side light
- R unit: ⁇ m
- stationary angle accuracy ⁇ unit: degree
- FIG. 5 shows examples in which the core arrangement radius R is 40 ⁇ m, 50 ⁇ m, and 60 ⁇ m. As is clear from these comparisons, the connection loss increases as the core arrangement radius increases.
- a cross wiring portion S4 is provided in the optical path S3 connecting the rotary optical switches S1 to each other.
- the cross wiring section S4-11 that connects the rotary optical switches S1-11 and S1-12 has a large loss optical path in the rotary optical switch S1-11 and a small loss optical path in the rotary optical switch S1-12. Connect the optical paths to each other.
- the transmission loss in the rotary optical switch S1-11 decreases in the order of optical path S31-1, optical path S31-2, optical path S31-3, and optical path S31-4 shown in FIG.
- the optical path S31-1, the optical path S31-2, the optical path S31-3, and the optical path S31-4 shown in FIG. 4 are smaller in this order.
- the cross wiring section S4-11 connecting the rotary optical switches S1-11 and S1-21 is an optical path S31-4 with a large loss in the rotary optical switch S1-11 and the optical path S31-4 in the rotary optical switch S1-11.
- the low-loss optical paths S31-1 at -12 are connected to each other.
- FIG. 6 is a diagram showing the details of the cross wiring portions S4 respectively provided in the middle of the wiring S3 portions between the 1 ⁇ N rotary optical switches S1 in FIG. As shown in the figure, it is characterized by providing a cross wiring section in which one optical path is arranged in descending order and the other optical path is arranged in ascending order and connected to each other.
- the optical path connected to the rotary optical switch S1-11 of the cross wiring section S4-11 is the rotary optical switch S1-11.
- the optical path S31-1, the optical path S31-2, the optical path S31-3, and the optical path S31-4 are arranged in this order so that the loss in the switch S1-11 is in ascending order.
- the optical path connected to the rotary optical switch S1-12 of the cross wiring section S4-11 is arranged such that the loss in the rotary optical switch S1-12 is in descending order.
- S31-3, optical path S31-2, and optical path S31-1 are arranged in this order.
- the present disclosure provides an optical cross-connect device that transmits two 1 ⁇ N rotary optical switches for one input/output optical path.
- a cross wiring portion is provided in the wiring for connecting between them.
- the sum of the optical axis deviation amounts in the input and output is approximately equal. It is possible to reduce the optical loss deviation caused by the optical axis deviation with respect to the rotation angle error due to the difference in the core arrangement radius of the optical path in the optical cross-connect device.
- the present disclosure can provide an optical cross-connect device used in an optical fiber network that can meet strict loss budget requirements between transmission devices required in access networks and the like. Furthermore, the present disclosure facilitates the installation and loss design of a transmission device equipped with an optical cross-connect function, thus facilitating the realization of an optical fiber network equipped with an optical cross-connect function.
- the number of directions N of a rotary optical switch of 1 direction ⁇ N directions is larger than that of the present embodiment, or a plurality of directions in one direction.
- the number of optical paths x is larger than that of this embodiment.
- the present disclosure can be applied even when a large-scale optical cross-connect device is configured by using two or more, for example, two-stage rotary optical switches on the input and output sides.
- the optical switch according to the present disclosure provides a low-loss and economical optical cross in an optical transmission line using a single-mode optical fiber, for example, in an optical access transmission line that requires particularly strict low-loss performance. It can be used as a connect device.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mathematical Physics (AREA)
- Mechanical Light Control Or Optical Switches (AREA)
Abstract
Description
光ファイバを用いた複数の光経路の切替を行う光スイッチが光経路で互いに接続されている光クロスコネクト装置であって、
前記光スイッチは、前記複数の光経路の切り替えを、回転体を用いて一括で行い、
前記光スイッチ間を互いに接続する光経路に、一括で切り替えられる前記複数の光経路のうちの一方の前記光スイッチにおける損失の大きな光経路と、一括で切り替えられる前記複数の光経路のうちの他方の前記光スイッチにおける損失の小さな光経路と、を接続するクロス配線部を備える。
図1は本開示の実施形態に係る光クロスコネクト装置を示すブロック構成図である。ここでは一例として、1×N(Nは1~4の自然数)の回転型光スイッチS1とその向きを左右対称にしたN×1の前記回転型光スイッチS1を入出力側にそれぞれ複数配置した、入力経路S2が4、出力経路S2が4の、完全非閉塞光クロスコネクト装置の場合を示している。なお、Nは1~4の自然数としたが、Nは入出力経路の数であればよく、この限りではない。
以降、同図に示す光クロスコネクト装置の各構成機能を述べる。
S2:入出力光経路
S2-x:光経路
S27:フェルール
S28:フェルール
S29:回転運動
S3:配線
S3N-x:光経路
S4、S4-11、S4-12:クロス配線部
S9-x:コア配置半径
Claims (5)
- 光ファイバを用いた複数の光経路の切替を行う光スイッチが光経路で互いに接続されている光クロスコネクト装置であって、
前記光スイッチは、前記複数の光経路の切り替えを、回転体を用いて一括で行い、
前記光スイッチ間を互いに接続する光経路に、一括で切り替えられる前記複数の光経路のうちの一方の前記光スイッチにおける損失の大きな光経路と、一括で切り替えられる前記複数の光経路のうちの他方の前記光スイッチにおける損失の小さな光経路と、を接続するクロス配線部を備える、
ことを特徴とする光クロスコネクト装置。 - 前記光スイッチは、円筒形状を有し、前記複数の光経路が前記円筒形状の中心軸から異なる距離に配置されている2つの回転体を備え、
前記2つの回転体のうち、一方に対して他方を回転させることで、前記複数の光経路の切替を一括で行う、
ことを特徴とする請求項1に記載の光クロスコネクト装置。 - 前記2つの回転体の前記他方は、前記円筒形状の中心軸から前記2つの回転体の前記一方と同じ距離であり、かつ複数の回転角度に、前記複数の光経路が配置されている、
請求項2に記載の光クロスコネクト装置。 - 前記2つの回転体が、
円筒形状のうちの予め定められた複数の位置で光ファイバを固定するフェルール、又は
円筒形状のうちの予め定められた複数の位置にコアを有するマルチコア光ファイバである、
請求項2又は3に記載の光クロスコネクト装置。 - 前記クロス配線部において前記一方の前記光スイッチと接続される光経路は、前記一方の前記光スイッチにおける損失の大きさが昇順になるように配置され、
前記クロス配線部において前記他方の前記光スイッチと接続される光経路は、前記他方の前記光スイッチにおける損失の大きさが降順になるように配置されている、
請求項1から4のいずれかに記載の光クロスコネクト装置。
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2022577938A JP7485096B2 (ja) | 2021-01-29 | 2021-01-29 | 光クロスコネクト装置 |
PCT/JP2021/003164 WO2022162858A1 (ja) | 2021-01-29 | 2021-01-29 | 光クロスコネクト装置 |
US18/272,644 US20240151909A1 (en) | 2021-01-29 | 2021-01-29 | Optical cross-connect device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2021/003164 WO2022162858A1 (ja) | 2021-01-29 | 2021-01-29 | 光クロスコネクト装置 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2022162858A1 true WO2022162858A1 (ja) | 2022-08-04 |
Family
ID=82652798
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2021/003164 WO2022162858A1 (ja) | 2021-01-29 | 2021-01-29 | 光クロスコネクト装置 |
Country Status (3)
Country | Link |
---|---|
US (1) | US20240151909A1 (ja) |
JP (1) | JP7485096B2 (ja) |
WO (1) | WO2022162858A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2024100722A1 (ja) * | 2022-11-07 | 2024-05-16 | 日本電信電話株式会社 | 光クロスコネクトの切替システム及び切替方法 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4239330A (en) * | 1978-10-18 | 1980-12-16 | Bell Telephone Laboratories, Incorporated | Multiple optical switch |
JPH0282212A (ja) * | 1988-09-20 | 1990-03-22 | Fujitsu Ltd | 光スイッチ |
US20030202737A1 (en) * | 2002-04-25 | 2003-10-30 | Mingbao Zhou | Optical switch |
US20050254747A1 (en) * | 2002-07-09 | 2005-11-17 | Calient Networks, Inc. | Optical switch with adjustable optical loss |
-
2021
- 2021-01-29 US US18/272,644 patent/US20240151909A1/en active Pending
- 2021-01-29 WO PCT/JP2021/003164 patent/WO2022162858A1/ja active Application Filing
- 2021-01-29 JP JP2022577938A patent/JP7485096B2/ja active Active
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4239330A (en) * | 1978-10-18 | 1980-12-16 | Bell Telephone Laboratories, Incorporated | Multiple optical switch |
JPH0282212A (ja) * | 1988-09-20 | 1990-03-22 | Fujitsu Ltd | 光スイッチ |
US20030202737A1 (en) * | 2002-04-25 | 2003-10-30 | Mingbao Zhou | Optical switch |
US20050254747A1 (en) * | 2002-07-09 | 2005-11-17 | Calient Networks, Inc. | Optical switch with adjustable optical loss |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2024100722A1 (ja) * | 2022-11-07 | 2024-05-16 | 日本電信電話株式会社 | 光クロスコネクトの切替システム及び切替方法 |
Also Published As
Publication number | Publication date |
---|---|
US20240151909A1 (en) | 2024-05-09 |
JP7485096B2 (ja) | 2024-05-16 |
JPWO2022162858A1 (ja) | 2022-08-04 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4457581A (en) | Passive fiber optic data bus configurations | |
JP4153953B2 (ja) | 光ファイバ・パワー・スプリッタ・モジュール装置 | |
US5729642A (en) | N×N optical switch array using electro-optic and passive waveguide circuits on planar substrates | |
US9703041B2 (en) | Multi-channel optical connector with coupling lenses | |
KR20150064158A (ko) | 광 커넥터 | |
CA2007693C (en) | Optical fiber wiring apparatus | |
WO2022162858A1 (ja) | 光クロスコネクト装置 | |
US6917746B2 (en) | Apparatus and method for creating a fiber optic circuit | |
US5074634A (en) | Optical multiplexing/demultiplexing device | |
CN109799579A (zh) | 光纤交叉光缆 | |
US20220113476A1 (en) | Optical connectors and optical ferrules | |
WO2023067772A1 (ja) | 光接続モジュール | |
US20230324621A1 (en) | Optical switch | |
JP4412665B2 (ja) | 可変型光合分波器 | |
JPH11223733A (ja) | 光配線の形成方法 | |
WO2022018783A1 (ja) | 光スイッチ | |
WO2024028942A1 (ja) | 光クロスコネクト装置及びその製造方法 | |
JP2658400B2 (ja) | 中空光ロータリジョイント | |
JP3599080B2 (ja) | 導波型スプリッタアレイ | |
EP2286553B1 (en) | Hierarchical passive networks | |
JP3393101B2 (ja) | 光ファイバ配線板 | |
WO2024142152A1 (ja) | 光伝送路及び接続方法 | |
WO2024075219A1 (ja) | 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 | |
WO2023053273A1 (ja) | 光伝送装置、光伝送装置の製造方法及び光ケーブルシステム | |
WO2022157847A1 (ja) | 光クロスコネクト装置 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 21922874 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2022577938 Country of ref document: JP Kind code of ref document: A |
|
WWE | Wipo information: entry into national phase |
Ref document number: 18272644 Country of ref document: US |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
122 | Ep: pct application non-entry in european phase |
Ref document number: 21922874 Country of ref document: EP Kind code of ref document: A1 |