WO2023238213A1 - 光ファイバ分岐作製方法、光ファイバ分岐作製装置及び光ファイバ分岐作製プログラム - Google Patents

光ファイバ分岐作製方法、光ファイバ分岐作製装置及び光ファイバ分岐作製プログラム Download PDF

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Publication number
WO2023238213A1
WO2023238213A1 PCT/JP2022/022869 JP2022022869W WO2023238213A1 WO 2023238213 A1 WO2023238213 A1 WO 2023238213A1 JP 2022022869 W JP2022022869 W JP 2022022869W WO 2023238213 A1 WO2023238213 A1 WO 2023238213A1
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WO
WIPO (PCT)
Prior art keywords
optical fiber
working
branch
light intensity
branching
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/JP2022/022869
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English (en)
French (fr)
Japanese (ja)
Inventor
卓威 植松
一貴 納戸
裕之 飯田
栄伸 廣田
和典 片山
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NTT Inc
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Nippon Telegraph and Telephone Corp
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Publication date
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Priority to PCT/JP2022/022869 priority Critical patent/WO2023238213A1/ja
Priority to JP2024526059A priority patent/JPWO2023238213A1/ja
Publication of WO2023238213A1 publication Critical patent/WO2023238213A1/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
    • G02B6/24—Coupling light guides
    • G02B6/26—Optical coupling means
    • 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
    • G02B6/28—Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals

Definitions

  • the present disclosure relates to a technique for bringing together the polished side surface of a working optical fiber and the polished side surface of a branched optical fiber, and fixing the working optical fiber and the branched optical fiber.
  • Non-Patent Documents 1, 2, etc. disclose a technique for fixing the working optical fiber and the branching optical fiber by bringing together the polished side surface of the working optical fiber and the polished side surface of the branching optical fiber.
  • FIG. 1 shows the configuration of a conventional optical fiber branch manufacturing device.
  • the optical fiber branch manufacturing apparatus C1 includes a working optical fiber fixing section 11, a branch optical fiber fixing section 12, an optical fiber position adjustment section 13, an optical fiber moving section 14, a branching light source 15, a branching light intensity measuring section 16, and a branching characteristic calculating section. 17, and fixes the working optical fiber SF and the branch optical fiber CF.
  • the working optical fiber fixing unit 11 is a glass jig or the like for fixing the working optical fiber SF and polishing the side surface of the working optical fiber SF.
  • a bend is applied to the lower side of the side polished portion of the currently used optical fiber SF to an extent that does not affect optical communication, and the light intensity leaking from the bend is measured.
  • the side polished portion of the working optical fiber SF is polished, and when the light intensity leaking from the bending has decreased to the desired intensity, the polishing of the side polished portion of the working optical fiber SF is finished, and the side surface of the working optical fiber SF is finished. Release the bend on the bottom side of the polishing part.
  • the branch optical fiber fixing part 12 is a glass jig or the like for fixing the branch optical fiber CF after polishing the side surface of the branch optical fiber CF in advance.
  • the coating and cladding of the branched optical fiber CF are polished up to several ⁇ m from the core of the branched optical fiber CF or to just before the core.
  • the optical fiber position adjustment unit 13 brings together the polished side surface of the working optical fiber SF and the polished side surface of the branched optical fiber CF.
  • the optical fiber moving unit 14 controls the optical fiber position adjustment unit 13 and adjusts the current optical fiber SF to the current optical fiber SF so that the branching rate, which is the ratio of coupling the current optical fiber SF and the branched optical fiber CF, becomes a desired rate.
  • Branch optical fiber CF is relatively moved.
  • the working optical fiber fixing section 11 and the branch optical fiber fixing section 12 irradiate the inserted ultraviolet curing resin with ultraviolet rays to fix the working optical fiber SF and the branch optical fiber CF.
  • the branch light source 15 is installed on the upper side of the polished side surface of the branch optical fiber CF.
  • the branched light intensity measurement unit 16 is installed on the lower side of the polished side surface of the branched optical fiber CF.
  • the branching characteristic calculating unit 17 calculates a branching rate, which is the rate of coupling from the branched optical fiber CF to the working optical fiber SF, based on the branched light intensity measured by the branched light intensity measuring unit 16.
  • the output light intensity outputted by the branched light source 15 is Pin
  • the branched light intensity measured by the branched light intensity measuring section 16 is Pth.
  • the branching rate becomes 1-(Pth/Pin).
  • the branch light source 15 needs to be installed on the upper side of the polished side surface of the branch optical fiber CF. Since the optical signal having the optical intensity (Pin-Pth) is coupled to the communication light at the lower side of the side polished surface of the working optical fiber There are issues that may affect optical communications.
  • the present disclosure brings together the polished side surface of the currently used optical fiber and the polished side surface of the branched optical fiber, and when fixing the currently used optical fiber and the branched optical fiber, the branched optical fiber is
  • the purpose of this invention is to eliminate the need to install a branch light source on the fiber side, and to reduce the possibility of affecting the current optical communication on the current optical fiber side.
  • the currently used light intensity measuring device is installed on the lower side of the polished side surface of the currently used optical fiber.
  • the branched light source is not installed above the polished side surface of the branched optical fiber.
  • the original communication light is used as a light source without installing an additional light source.
  • the branching rate which is the rate of coupling from the current optical fiber to the branch optical fiber, and the rate of propagation to the current optical fiber without being coupled to the branch optical fiber, are determined. At least one of the propagation rate, which is a ratio, is calculated.
  • the present disclosure provides an optical fiber branch manufacturing method in which a polished side surface of a working optical fiber and a polished side surface of a branched optical fiber are brought together and the worked optical fiber and the branched optical fiber are fixed. and a branching rate that is the rate of coupling from the working optical fiber to the branch optical fiber based on the working light intensity measured by the working light intensity measuring device installed at the lower side of the side polished surface of the working optical fiber.
  • This optical fiber branch manufacturing method is characterized by sequentially comprising an optical fiber moving step of moving the branched optical fiber relative to the working optical fiber so that at least one of the branched optical fibers has a desired ratio.
  • the present disclosure also provides an optical fiber branch fabrication device that brings together a polished side surface of a working optical fiber and a polished side surface of a branched optical fiber, and fixes the working optical fiber and the branched optical fiber, a branching rate that is the rate of coupling from the working optical fiber to the branch optical fiber, based on the working light intensity measured by a working light intensity measurement device installed on the lower side of the polished side surface of the working optical fiber; a branching characteristic calculation unit that calculates at least one of a propagation rate that is a rate of propagation to the working optical fiber without being coupled to a branched optical fiber; and at least one of the branching rate and the propagation rate.
  • the optical fiber branch manufacturing apparatus is characterized in that it includes an optical fiber moving unit that moves the branch optical fiber relative to the working optical fiber so that either one of the branch optical fibers has a desired ratio.
  • the present disclosure provides a method for attaching a branch light source on the branch optical fiber side when the side polished surface of the working optical fiber and the side polished surface of the branch optical fiber are brought together and the working optical fiber and the branch optical fiber are fixed. In addition to eliminating the need for installation, it is possible to reduce the risk of affecting the current optical communication on the current optical fiber side.
  • FIG. 1 is a diagram showing the configuration of a conventional optical fiber branch manufacturing apparatus.
  • FIG. 1 is a diagram showing the configuration of an optical fiber branch manufacturing apparatus according to a first embodiment. It is a figure which shows the process of the optical fiber branch manufacturing method of 1st Embodiment. It is a figure showing the procedure of branch characteristic calculation processing of a 1st embodiment. It is a figure showing the composition of the optical fiber branch production device of a 2nd embodiment. It is a figure which shows the process of the optical fiber branch manufacturing method of 2nd Embodiment. It is a figure showing the procedure of branch characteristic calculation processing of a 2nd embodiment.
  • FIG. 7 is a diagram showing the configuration of a working light intensity measuring section according to a third embodiment.
  • FIG. 2 shows the configuration of the optical fiber branch manufacturing apparatus of the first embodiment.
  • the optical fiber branch manufacturing device C2 includes a working optical fiber fixing section 21, a branching optical fiber fixing section 22, an optical fiber position adjustment section 23, an optical fiber moving section 24, a working light intensity measuring section 25, and a branching characteristic calculating section 26,
  • the working optical fiber SF and branch optical fiber CF are fixed.
  • FIG. 3 shows the steps of the optical fiber branch manufacturing method of the first embodiment.
  • FIG. 4 shows the procedure of branch characteristic calculation processing in the first embodiment.
  • the optical fiber moving section 24 and the branching characteristic calculating section 26 can also be realized by a computer and the program shown in FIG. 3, and the program can be recorded on a recording medium or provided through a network.
  • the working optical fiber fixing part 21, the branch optical fiber fixing part 22, and the optical fiber position adjusting part 23 are similar to the working optical fiber fixing part 11, the branch optical fiber fixing part 12, and the optical fiber position adjusting part 13 shown in FIG. , executes the process (steps S1 to S3).
  • the working light intensity measurement unit 25 is installed on the lower side of the polished side surface of the working optical fiber SF.
  • the working light intensity measuring section 25 may be provided inside the optical fiber branch manufacturing apparatus C2, or may be provided outside the optical fiber branch manufacturing apparatus C2 (see FIG. 8).
  • the optical fiber moving unit 24 controls the optical fiber position adjusting unit 23 to move the branched optical fiber CF relative to the working optical fiber SF in the direction perpendicular to the light propagation direction (step S4).
  • the branching characteristic calculating section 26 calculates at least one of the following branching characteristics based on the working light intensity measured by the working light intensity measuring section 25 (step S5): (1) Branching from the working optical fiber SF (2) branching rate, which is the rate of coupling to optical fiber CF; and (2) propagation rate, which is the rate of propagation to working optical fiber SF without being coupled to branched optical fiber CF.
  • Pin be the input light intensity input to the face-to-face position of the working optical fiber SF and the branch optical fiber CF.
  • the acquisition efficiency in the current light intensity measuring section 25 is assumed to be C.
  • the working light intensity is set to P0 (first stage in FIG. 4).
  • the working light intensity is set to P1 (second stage in FIG. 4).
  • the working light intensity is P2
  • the excess loss at the meeting position is Pe, and the light passes through the meeting position and enters the working optical fiber SF.
  • Pt' be the intensity of the propagating light
  • the intensity of the coupled light coupled to the branched optical fiber CF at the face-to-face position is 0 (third stage in FIG. 4).
  • the working light intensity is set to P3
  • the excess loss at the meeting position is set to Pe
  • the light passes through the meeting position and propagates to the working optical fiber SF.
  • the intensity of the propagating light be Pt
  • the intensity of the coupled light coupled to the branched optical fiber CF at the face-to-face position be Pc (fourth stage in FIG. 4).
  • P0 C*Pin
  • the optical fiber moving section 24 and the branching characteristic calculating section 26 perform steps S4 to Repeat S6.
  • the working optical fiber fixing section 11 and the branching optical fiber fixing section 12 insert The cured ultraviolet curing resin is irradiated with ultraviolet light to fix the working optical fiber SF and the branched optical fiber CF (step S7).
  • the original communication light is used as a light source without installing an additional light source. Therefore, it is not necessary to install the branch light source 15 on the branch optical fiber CF side, and it is possible to reduce the possibility of affecting the current optical communication on the working optical fiber SF side. Further, it is also possible to eliminate the need to install the branched light intensity measuring section 16 on the branched optical fiber CF side.
  • FIG. 5 shows the configuration of an optical fiber branch manufacturing apparatus according to the second embodiment.
  • the optical fiber branch manufacturing device C3 includes a working optical fiber fixing section 31, a branch optical fiber fixing section 32, an optical fiber position adjustment section 33, an optical fiber moving section 34, a working light intensity measurement section 35, a branch light intensity measurement section 36, and a branch A characteristic calculating section 37 is provided to fix the working optical fiber SF and the branch optical fiber CF.
  • FIG. 6 shows the steps of the optical fiber branch manufacturing method of the second embodiment.
  • FIG. 7 shows the procedure of branch characteristic calculation processing in the second embodiment.
  • the optical fiber moving section 34 and the branching characteristic calculating section 37 can also be realized by a computer and the program shown in FIG. 6, and the program can be recorded on a recording medium or provided through a network.
  • the working optical fiber fixing part 31, the branch optical fiber fixing part 32, and the optical fiber position adjusting part 33 are similar to the working optical fiber fixing part 11, the branch optical fiber fixing part 12, and the optical fiber position adjusting part 13 shown in FIG. , executes the process (steps S11 to S13).
  • optical fiber moving section 34, the working light intensity measuring section 35, and the branching characteristic calculating section 37 are the same as the optical fiber moving section 24, the working light intensity measuring section 25, and the branching characteristic calculating section 26 shown in FIG. Then, processing is executed (steps S14, S15, S17, S18).
  • the branched light intensity measurement unit 36 is installed on the lower side of the polished side surface of the branched optical fiber CF.
  • the branched light intensity measuring section 36 may be provided inside the optical fiber branch manufacturing apparatus C3, or may be provided outside the optical fiber branch manufacturing apparatus C3 (see FIG. 8).
  • the branching characteristic calculating section 37 calculates at least one of the following branching characteristics based also on the branched light intensity measured by the branched light intensity measuring section 36 (step S16): (1) Current light intensity measuring section Acquisition efficiency C at 35, (2) Excess loss Pe/Pin at the meeting position of the working optical fiber SF and branch optical fiber CF, (3) To the meeting position of the working optical fiber SF and branch optical fiber CF (4) The propagation light intensity Pt that passes through the meeting position of the working optical fiber SF and the branched optical fiber CF and propagates to the working optical fiber SF.
  • the first and second stages in FIG. 7 are similar to the first and second stages in FIG. 4.
  • the third and fourth stages in FIG. 7 differ from the third and fourth stages in FIG. 4 as follows. After the working optical fiber SF and the branch optical fiber CF are brought into alignment and before alignment, the intensity of the coupled light coupled to the branch optical fiber CF at the meeting position becomes 0, and the branched light intensity becomes 0 (as shown in FIG. 7). 3rd paragraph). After the current optical fiber SF and the branched optical fiber CF are aligned and during alignment, the intensity of the coupled light coupled to the branched optical fiber CF at the alignment position is Pc, and the intensity of the branched light is Pc. 4 steps).
  • the acquisition efficiency C By recording and managing the acquisition efficiency C, it can be used to calculate the input light intensity Pin and the propagated light intensity Pt, and it can be used to detect abnormalities, deterioration, and failures of the working light intensity measuring section 35.
  • the excess loss Pe/Pin By recording and managing the excess loss Pe/Pin, it can be utilized for evaluating the performance of an optical multiplexer/demultiplexer including a working optical fiber SF and a branched optical fiber CF.
  • FIG. 8 shows the configuration of the current light intensity measuring section of the third embodiment.
  • the current light intensity measuring units 25 and 35 may be provided inside or outside the optical fiber branch manufacturing apparatuses C2 and C3.
  • the branched light intensity measurement unit 36 may be provided inside or outside the optical fiber branch manufacturing apparatus C3.
  • the working light intensity measuring units 25 and 35 include an optical fiber bending part 41 and a photodetector 42, and the photodetector 42 measures the leakage light intensity from the optical fiber bending part 41 as the working light intensity.
  • the working light intensity measurement sections 25 and 35 include a tap coupler 43 and a power meter 44, and the power meter 44 measures the branched light intensity from the tap coupler 43 as the working light intensity.
  • the working light intensity measurement sections 25 and 35 include an optical multiplexer/demultiplexer 45 and a power meter 46, and the power meter 46 measures the branched light intensity from the empty port of the optical multiplexer/demultiplexer 45 for the current use. Measured as light intensity.
  • the working light intensity measurement sections 25 and 35 are equipped with a power meter 47, and the power meter 47 measures the output light intensity from the bus wiring end of the working optical fiber SF as the working light intensity.
  • optical fiber branch production method, optical fiber branch production apparatus, and optical fiber branch production program of the present disclosure branch light from a current optical fiber and/or branch light into a current optical fiber without cutting the current optical fiber. It can be applied to optical multiplexing and demultiplexing technology that multiplexes light.
  • Optical fiber branch fabrication device SF Working optical fiber CF: Branch optical fibers 11, 21, 31: Working optical fiber fixing parts 12, 22, 32: Branch optical fiber fixing parts 13, 23, 33: Optical Fiber position adjustment units 14, 24, 34: Optical fiber moving unit 15: Branch light sources 16, 36: Branch light intensity measurement units 17, 26, 37: Branch characteristic calculation units 25, 35: Current light intensity measurement unit 41: Optical fiber Bending part 42: Photodetector 43: Tap couplers 44, 46, 47: Power meter 45: Optical multiplexer/demultiplexer

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Optical Couplings Of Light Guides (AREA)
PCT/JP2022/022869 2022-06-07 2022-06-07 光ファイバ分岐作製方法、光ファイバ分岐作製装置及び光ファイバ分岐作製プログラム Ceased WO2023238213A1 (ja)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2026069615A1 (ja) * 2024-09-27 2026-04-02 Ｎｔｔ株式会社 光ファイバカプラの光学特性調整方法

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0438422A (ja) * 1990-06-04 1992-02-07 Hitachi Ltd 光干渉センサ、光分岐結合器および光干渉センサの製作装置
JPH05224075A (ja) * 1992-02-13 1993-09-03 Fujikura Ltd 偏波保持光ファイバカプラ
JPH0667054A (ja) * 1992-08-17 1994-03-11 Nippon Telegr & Teleph Corp <Ntt> カプラ型光フィルタ
JP2002307235A (ja) * 2002-03-27 2002-10-23 Yotsugi Co Ltd 研磨装置ならびに光ファイバケーブルの被膜除去方法および分岐方法
DE102008030251A1 (de) * 2008-06-25 2009-12-31 Hoya Corp. Vorrichtung zum Erfassen des Zustands eines optischen Filters sowie Beleuchtungseinrichtung
JP2017518482A (ja) * 2014-04-11 2017-07-06 ロッキード マーティン コーポレーション 非接触光パワー測定のためのシステム及び方法
WO2021166262A1 (ja) * 2020-02-21 2021-08-26 日本電信電話株式会社 光合分波方法、光合分波回路及び光合分波回路製造方法
WO2022034660A1 (ja) * 2020-08-12 2022-02-17 日本電信電話株式会社 分岐比測定装置、分岐比測定方法及び光合分波回路製造方法

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0438422A (ja) * 1990-06-04 1992-02-07 Hitachi Ltd 光干渉センサ、光分岐結合器および光干渉センサの製作装置
JPH05224075A (ja) * 1992-02-13 1993-09-03 Fujikura Ltd 偏波保持光ファイバカプラ
JPH0667054A (ja) * 1992-08-17 1994-03-11 Nippon Telegr & Teleph Corp <Ntt> カプラ型光フィルタ
JP2002307235A (ja) * 2002-03-27 2002-10-23 Yotsugi Co Ltd 研磨装置ならびに光ファイバケーブルの被膜除去方法および分岐方法
DE102008030251A1 (de) * 2008-06-25 2009-12-31 Hoya Corp. Vorrichtung zum Erfassen des Zustands eines optischen Filters sowie Beleuchtungseinrichtung
JP2017518482A (ja) * 2014-04-11 2017-07-06 ロッキード マーティン コーポレーション 非接触光パワー測定のためのシステム及び方法
WO2021166262A1 (ja) * 2020-02-21 2021-08-26 日本電信電話株式会社 光合分波方法、光合分波回路及び光合分波回路製造方法
WO2022034660A1 (ja) * 2020-08-12 2022-02-17 日本電信電話株式会社 分岐比測定装置、分岐比測定方法及び光合分波回路製造方法

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2026069615A1 (ja) * 2024-09-27 2026-04-02 Ｎｔｔ株式会社 光ファイバカプラの光学特性調整方法

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