WO2009099281A2 - Dispositif de connexion de fibres optiques et système de mesure de qualité de fibres optiques utilisant ledit dispositif - Google Patents

Dispositif de connexion de fibres optiques et système de mesure de qualité de fibres optiques utilisant ledit dispositif Download PDF

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Publication number
WO2009099281A2
WO2009099281A2 PCT/KR2009/000422 KR2009000422W WO2009099281A2 WO 2009099281 A2 WO2009099281 A2 WO 2009099281A2 KR 2009000422 W KR2009000422 W KR 2009000422W WO 2009099281 A2 WO2009099281 A2 WO 2009099281A2
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WO
WIPO (PCT)
Prior art keywords
optical fiber
vacuum
optical
measuring
pressure
Prior art date
Application number
PCT/KR2009/000422
Other languages
English (en)
Korean (ko)
Other versions
WO2009099281A4 (fr
WO2009099281A3 (fr
Inventor
Tae-Kyoung Yook
Lae-Hyuk Park
Ji-Sang Park
Soon-Il Sohn
Hyung-Soo Shin
Original Assignee
Ls Cable Ltd.
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 Ls Cable Ltd. filed Critical Ls Cable Ltd.
Publication of WO2009099281A2 publication Critical patent/WO2009099281A2/fr
Publication of WO2009099281A3 publication Critical patent/WO2009099281A3/fr
Publication of WO2009099281A4 publication Critical patent/WO2009099281A4/fr

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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
    • 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
    • G02B6/36—Mechanical coupling means
    • G02B6/38—Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807—Dismountable connectors, i.e. comprising plugs
    • G02B6/3809—Dismountable connectors, i.e. comprising plugs without a ferrule embedding the fibre end, i.e. with bare fibre end
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
    • G01M11/30—Testing of optical devices, constituted by fibre optics or optical waveguides
    • G01M11/33—Testing of optical devices, constituted by fibre optics or optical waveguides with a light emitter being disposed at one fibre or waveguide end-face, and a light receiver at the other end-face
    • G01M11/336—Testing of optical devices, constituted by fibre optics or optical waveguides with a light emitter being disposed at one fibre or waveguide end-face, and a light receiver at the other end-face by measuring polarization mode dispersion [PMD]
    • 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
    • G02B6/36—Mechanical coupling means
    • G02B6/3616—Holders, macro size fixtures for mechanically holding or positioning fibres, e.g. on an optical bench
    • G02B6/362—Vacuum holders for optical elements
    • 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
    • G02B6/36—Mechanical coupling means
    • G02B6/3628—Mechanical coupling means for mounting fibres to supporting carriers
    • G02B6/3632—Mechanical coupling means for mounting fibres to supporting carriers characterised by the cross-sectional shape of the mechanical coupling means
    • G02B6/3636—Mechanical coupling means for mounting fibres to supporting carriers characterised by the cross-sectional shape of the mechanical coupling means the mechanical coupling means being grooves
    • 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
    • G02B6/36—Mechanical coupling means
    • G02B6/3628—Mechanical coupling means for mounting fibres to supporting carriers
    • G02B6/3648—Supporting carriers of a microbench type, i.e. with micromachined additional mechanical structures
    • G02B6/3652—Supporting carriers of a microbench type, i.e. with micromachined additional mechanical structures the additional structures being prepositioning mounting areas, allowing only movement in one dimension, e.g. grooves, trenches or vias in the microbench surface, i.e. self aligning supporting carriers

Definitions

  • the present invention relates to an apparatus for connecting optical fibers, and more particularly, to an apparatus for connecting an optical fiber under measurement connected to measurement equipment and a measuring optical fiber to be measured, and an optical fiber quality measuring system by the apparatus.
  • optical loss refers to a phenomenon in which an optical signal propagated to an optical fiber is weakened inside, and the optical loss acts as a factor for limiting a transmission distance of the optical signal.
  • polarization mode dispersion refers to a phenomenon in which a speed difference occurs between polarization modes transmitted to the inside of the optical fiber due to refractive index anisotropy (asymmetry) on the optical fiber cross section (ie, core layer) that occurs in optical fiber manufacturing.
  • the optical fiber in which the polarization mode dispersion occurs has a narrow transmission bandwidth and a short transmission distance.
  • the business establishment of the optical fiber measures the quality of the optical fiber before the optical fiber is shipped and searches for the optical fiber that does not meet a predetermined standard value.
  • the optical fiber produced by the measurement of the optical loss and the polarization mode dispersion is measured by the measurement equipment, and the optical fiber that does not meet a certain standard value is discarded.
  • the ends of the optical fiber to be respectively connected to the transmitter and the receiver of the PMD measuring device or the optical loss measuring device are connected to both ends of the finally manufactured optical fiber (ie, the measuring optical fiber).
  • the optical signal is transmitted from the measuring equipment, the optical signal is received through the transmitter, the transmitter connection fiber, the measurement fiber and the receiver connection fiber in sequence, and finally received by the receiver of the measurement equipment. Then, the measurement equipment analyzes the received optical signal to confirm whether the optical loss or polarization mode dispersion of the measurement optical fiber meets a reference value.
  • connection loss such as axial misalignment, angular tilt, and end separation may appear in the process of connecting the measurement optical fiber and the optical fiber to be measured.
  • the measured values of light loss and polarization mode dispersion are distorted. Therefore, the process of connecting the final optical fiber and the optical fiber to be measured serves as an important parameter in the process of measuring the quality of the final optical fiber.
  • the fusion splicing method has a low connection loss, but permanently connects the optical fiber under measurement and the optical fiber to be measured, and thus is not suitable as a method of connecting optical fibers shipped.
  • the mechanical connection method the optical fiber under measurement is connected to the optical fiber by using a connector or the like, so that the connection loss varies depending on the skill of the operator.
  • the mechanical connection method is not suitable for a workplace where a large amount of optical fiber is produced due to a long time for connecting the optical fiber to be measured and the optical fiber to be measured.
  • the present invention has been proposed to solve the above problems, and provides an optical fiber splicing apparatus and a fiber quality measuring system by the apparatus, wherein the connection setting time is fast and the variation of splice loss is low without permanently fusion of the optical fiber under measurement and the optical fiber. Its purpose is.
  • a measuring device for measuring the optical quality characteristics, such as PMD or optical loss of the optical fiber;
  • a connecting optical fiber comprising a first optical fiber connected to a transmitting end of the measuring device and a second optical fiber connected to a receiving end of the measuring device;
  • a measurement optical fiber connected to the first and second optical fibers to measure an optical quality characteristic by the measuring device;
  • a connection device for physically connecting the connection optical fiber and the measurement optical fiber to optically connect the connection optical fiber, wherein the connection device comprises: a vacuum pump for generating a vacuum pressure; And contact holding means for holding the connection optical fiber and the measurement optical fiber in contact with each other with the coating removed while maintaining the contact state by sucking the connection optical fiber and the measurement optical fiber using the vacuum pressure generated in the vacuum pump. Characterized in that.
  • the optical fiber quality measuring system further comprises a vacuum pipe for transmitting the vacuum pressure of the vacuum pump to the contact holding means.
  • the contact holding means comprises a V-shaped groove for supporting the connecting optical fiber and the measuring optical fiber; A slot formed in the bottom surface of the V-shaped groove; And an exhaust passage communicating the vacuum pipe and the slot.
  • the width of the slot is smaller than the diameter of the connecting optical fiber and the measuring optical fiber.
  • the vacuum pressure of the vacuum pump is preferably maintained at 0.15 bar to 0.40 bar when measuring the polarization mode dispersion of the measurement optical fiber, the vacuum pressure of the vacuum pump when measuring the optical loss of the measurement optical fiber It is preferable to keep it between 0.20 bar and 0.35 bar.
  • the contact holding means further includes a pressure sensor for measuring the pressure of the exhaust passage and a display device for displaying the pressure value measured by the pressure sensor to the outside.
  • an optical fiber connecting device includes a vacuum pump for generating a vacuum pressure; And contact holding means for supporting the two optical fibers which are in physical contact for optical connection while maintaining the contact state by suctioning and fixing the two optical fibers at the support surface using the vacuum pressure of the vacuum pump. It features.
  • FIG. 1 is a view showing the configuration of a system for measuring the optical fiber quality according to an embodiment of the present invention.
  • FIG. 2 is a cross-sectional view of a jig according to an embodiment of the present invention.
  • FIG 3 is a perspective view of a jig according to an embodiment of the present invention.
  • suction port 130 measuring optical fiber
  • FIG. 1 is a view showing the configuration of a system for measuring the optical fiber quality according to an embodiment of the present invention.
  • a system for measuring optical fiber quality includes a vacuum pump 110 for generating a vacuum pressure, an optical fiber 143 and 144 to be measured, and a measuring optical fiber ( Jig (120) to maintain the connection state while supporting the 130 and Polarization Mode Dispersion (hereinafter referred to as PMD) or measuring device 140 for measuring the optical loss.
  • PMD Polarization Mode Dispersion
  • the vacuum pump 110 includes a control switch 111 for adjusting the vacuum pressure, and is connected to the removable vacuum pipe 112.
  • the jig 120 is connected to the detachable vacuum pipe 112, and the optical fibers 143 and 144 and the optical fiber 130 to be measured are connected to each other with the cover removed in a groove formed in a V shape. Support. It is preferable to minimize the connection loss of the optical fiber (143, 144, 130) by spraying the index matching oil to the connection portion of the optical fiber (143, 144) and the measurement optical fiber (130).
  • an exhaust passage is formed from the bottom of the V-groove of the jig 120 to the point where the vacuum pipe 112 is connected, and thus, the air is formed between the vacuum pipe 112 and the bottom of the V-groove. Will flow. Therefore, when the vacuum pump 110 generates a vacuum pressure and sucks air, the measurement optical fibers 143 and 144 and the measurement optical fiber 130 supported in the V-shaped grooves are sucked to fix the connection state.
  • the measuring apparatus 140 is a PMD measuring apparatus or an optical loss measuring apparatus, and includes a transmitter 141 for transmitting an optical signal and a receiver 142 for receiving an optical signal.
  • the optical fibers 143 and 144 to be measured are connected to each of the transmitter 141 and the receiver 142, and the measuring device 140 transmits an optical signal to the optical fiber 143 connected to the transmitter 141.
  • the optical signal is finally received by the receiving unit 142 via the measuring optical fiber 130 and the measuring optical fiber 144 connected to the receiving unit 142 sequentially.
  • the measuring device 110 measures the optical loss or polarization mode dispersion based on the received optical signal.
  • FIG. 2 is a cross-sectional view of a jig according to an embodiment of the present invention.
  • the jig 120 includes a pressure sensor 121 and a vacuum pressure display 122, and a coupling part 123, an exhaust passage 124, and an intake port. 125 is formed.
  • the pressure sensor 121 is connected to the vacuum pressure display unit 122 and measures the vacuum pressure generated in the exhaust passage 124.
  • the vacuum pressure display unit 122 displays the vacuum pressure measured by the pressure sensor 121.
  • the coupling part 123 inserts and couples the vacuum pipe 112 and transmits the vacuum pressure generated by the vacuum pump 110 to the exhaust passage 124.
  • the exhaust passage 124 is a passage for discharging air between the coupling part 123 and the suction port 125. When the vacuum pressure is generated in the vacuum pump 110, the exhaust passage 124 sucks the air around the suction port 125.
  • the suction port 125 is positioned on the bottom surface of the V-shaped groove in which the optical fibers 143 and 144 and the optical fiber 130 to be measured are aligned, and extend along the length direction of the V-shaped groove.
  • the suction port 125 sucks the measurement optical fiber 130 and the optical fiber 143, 144 to be maintained to maintain the connection state of the optical fibers 130, 143, and 144.
  • the size of the suction port 125 is preferably formed to be narrower than the diameter of the core wire of the optical fiber (130, 143, 144) to prevent the phenomenon.
  • FIG 3 is a perspective view of a jig according to an embodiment of the present invention.
  • the suction port 125 is located at the bottom of the V-shaped groove and extends along the length direction of the V-shaped groove. Therefore, when a vacuum pressure is generated from the vacuum pump 110 while the measurement optical fiber 130 and the optical fiber 143 and 144 to be connected are placed on the suction port 125, the two optical fibers 130, 143, 144 is connected by the suction force of the suction port 125 is fixed. Accordingly, the connection state of the two optical fibers 130, 143, and 144 may be prevented from being deformed due to the external environment such as the shaking of the jig 120 and the shaking of the optical fibers 130, 143, and 144.
  • the vacuum pressure display unit 122 displays the vacuum pressure of the exhaust passage 124 measured by the pressure sensor 121 as a number.
  • an operator can easily connect the optical fibers 143 and 144 to the measurement optical fiber 130.
  • the operator can easily terminate the connection state between the optical fibers 143, 144 and the measurement optical fiber 130 to be measured. have.
  • Table 1 is a table showing the polarization mode dispersion (PMD) values measured while varying the vacuum pressure to the optical fiber connected by the vacuum connect method according to the present invention.
  • the PMD value is 0.058 ps / km 1. Measured with / 2 (measurement error ⁇ 0.05ps). Therefore, when the vacuum connection method according to the invention as it is set to the pressure is less than 0.15 bar and 0.40 bar in the binary jig (120), with the PMD 0.050ps / km 1/2 ⁇ 0.102ps / km 1/2 You can see that it is optimized.
  • Table 2 is a table showing the optical loss value measured while varying the vacuum pressure to the optical fiber connected by the vacuum connection system according to the present invention.
  • the optical loss value is 0.182 dB / km. Error ⁇ 0.002). Accordingly, in the case of the vacuum connection method according to the present invention, when the vacuum pressure generated in the jig 120 is set to 0.20 bar or more and 0.35 or less, the light loss value is optimized to 0.180db / km to 0.183db / km. You can see that.
  • Tables 3 and 4 are tables showing standard deviations of PMD values and standard deviations of optical loss values measured by the same operator repeatedly connecting the same optical fiber by a mechanical connection method and a vacuum connection method according to the present invention.
  • the vacuum connection method has a lower standard deviation of PMD and light loss than the mechanical connection method.
  • the vacuum connection method has an average connection setting time of 5 seconds, which is faster than the mechanical connection method.
  • the PMD and the optical loss of the optical fiber 130 are measured lower than that of the mechanical connection method. That is, the vacuum connection method according to the present invention can be seen that the connection loss is reduced more than the mechanical connection method.
  • Table 5 is a table showing PMD values and light loss values measured by a plurality of workers connecting the same optical fiber by a mechanical connection method and a vacuum connection method according to the present invention.
  • Table 5 it can be seen that the vacuum connection method according to the present invention has a lower standard deviation between the operators of the PMD and the light loss than the mechanical connection method. In other words, the mechanical connection method is severely varied according to the skill of the operator, while the vacuum connection method according to the present invention is less affected by the skill of the operator.
  • the vacuum connection method according to the present invention has a shorter connection setting time than the mechanical connection method, which is useful for a business that mass-produces optical fibers.
  • the vacuum connection method according to the present invention can be usefully used in the field of optical fiber inspection in which the optical fiber has to be temporarily connected to measure the quality state of the optical fiber without permanently connecting the optical fiber.
  • the vacuum connection method according to the present invention has a shorter connection setting time than the conventional mechanical connection method and is useful for a business for mass production of optical fibers.
  • the present invention can minimize the deviation of light loss and polarization mode dispersion (PMD) that depends on the skill of the operator.
  • PMD polarization mode dispersion
  • vacuum connection method according to the present invention can be usefully used in the field of optical fiber inspection for measuring the quality of embedded or installed optical fiber.

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • General Physics & Mathematics (AREA)
  • Chemical & Material Sciences (AREA)
  • Dispersion Chemistry (AREA)
  • Analytical Chemistry (AREA)
  • Testing Of Optical Devices Or Fibers (AREA)

Abstract

La présente invention concerne un dispositif de connexion de fibres optiques et un système de mesure de qualité de fibres optiques utilisant ledit dispositif. Le système de mesure de qualité de fibres optiques de la présente invention comprend une unité de mesure permettant de mesurer une qualité de fibres optiques, notamment une PMD (dispersion de mode de polarisation) ou une perte optique de fibre optique; une fibre optique de connexion comprenant une première fibre optique reliée à une extrémité d'émission de l'unité de mesure et une seconde fibre optique reliée à une extrémité de réception de l'unité de mesure; une fibre optique cible reliée à la première fibre optique et à la seconde fibre optique de sorte qu'une qualité optique de la fibre optique cible peut être mesurée par l'unité de mesure; et un connecteur permettant de relier physiquement et optiquement la fibre optique de connexion et la fibre optique cible. Le connecteur comprend une pompe à vide permettant de générer une dépression; et une unité de retenue par contact permettant de supporter la fibre optique de connexion et la fibre optique cible qui sont non revêtues et reliées l'une à l'autre, et de maintenir l'état de contact par aspiration de la fibre optique de connexion et de la fibre optique cible à l'aide de la dépression générée par la pompe à vide. Le système de connexion à vide de la présente invention présente un temps d'établissement de connexion plus court que celui d'un système de connexion mécanique et est approprié pour être utilisé dans l'industrie des fibres optiques produites en série.
PCT/KR2009/000422 2008-02-05 2009-01-29 Dispositif de connexion de fibres optiques et système de mesure de qualité de fibres optiques utilisant ledit dispositif WO2009099281A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
KR10-2008-0011794 2008-02-05
KR1020080011794A KR100956485B1 (ko) 2008-02-05 2008-02-05 광섬유 접속 장치 및 그 장치에 의한 광섬유 품질 측정시스템

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WO2009099281A2 true WO2009099281A2 (fr) 2009-08-13
WO2009099281A3 WO2009099281A3 (fr) 2009-11-05
WO2009099281A4 WO2009099281A4 (fr) 2010-01-28

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102047123B1 (ko) * 2019-05-20 2019-11-20 한국해양과학기술원 시간 영역에서의 계층 식별 방법

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000009961A (ja) * 1998-06-19 2000-01-14 Japan Tobacco Inc コネクタ接続装置
KR20010113894A (ko) * 1999-04-26 2001-12-28 알프레드 엘. 미첼슨 편광 종속 손실의 측정 장치 및 방법
KR20020021084A (ko) * 1999-03-31 2002-03-18 알프레드 엘. 미첼슨 제조 환경에 적합한 편파 모드 분산 측정 시스템 및 방법

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2000009961A (ja) * 1998-06-19 2000-01-14 Japan Tobacco Inc コネクタ接続装置
KR20020021084A (ko) * 1999-03-31 2002-03-18 알프레드 엘. 미첼슨 제조 환경에 적합한 편파 모드 분산 측정 시스템 및 방법
KR20010113894A (ko) * 1999-04-26 2001-12-28 알프레드 엘. 미첼슨 편광 종속 손실의 측정 장치 및 방법

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Publication number Publication date
KR20090085885A (ko) 2009-08-10
WO2009099281A4 (fr) 2010-01-28
KR100956485B1 (ko) 2010-05-07
WO2009099281A3 (fr) 2009-11-05

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