JP2014006281A - Optical connector - Google Patents

Optical connector Download PDF

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Publication number
JP2014006281A
JP2014006281A JP2012139749A JP2012139749A JP2014006281A JP 2014006281 A JP2014006281 A JP 2014006281A JP 2012139749 A JP2012139749 A JP 2012139749A JP 2012139749 A JP2012139749 A JP 2012139749A JP 2014006281 A JP2014006281 A JP 2014006281A
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JP
Japan
Prior art keywords
optical fiber
light
ferrule
optical connector
optical
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.)
Pending
Application number
JP2012139749A
Other languages
Japanese (ja)
Inventor
Yasunori Yuki
泰紀 由木
Koji Hirao
浩司 平尾
Shinko Hamada
眞弘 濱田
Koretaka Shiraishi
維孝 白石
Yuki Masuda
有希 増田
Airi OBATA
愛里 小幡
Sonomi INOUE
園美 井上
Original Assignee
Sumiden Opcom Ltd
住電オプコム株式会社
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 Sumiden Opcom Ltd, 住電オプコム株式会社 filed Critical Sumiden Opcom Ltd
Priority to JP2012139749A priority Critical patent/JP2014006281A/en
Publication of JP2014006281A publication Critical patent/JP2014006281A/en
Application status is Pending legal-status Critical

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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M11/00Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
    • G01M11/30Testing of optical devices, constituted by fibre optics or optical waveguides
    • G01M11/31Testing of optical devices, constituted by fibre optics or optical waveguides with a light emitter and a light receiver being disposed at the same side of a fibre or waveguide end-face, e.g. reflectometers
    • G01M11/3109Reflectometers detecting the back-scattered light in the time-domain, e.g. OTDR
    • G01M11/3154Details of the opto-mechanical connection, e.g. connector or repeater
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B6/00Light guides
    • G02B6/24Coupling light guides
    • G02B6/26Optical coupling means
    • G02B6/28Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals
    • G02B6/293Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means
    • G02B6/29346Optical coupling means having data bus means, i.e. plural waveguides interconnected and providing an inherently bidirectional system by mixing and splitting signals with wavelength selective means operating by wave or beam interference
    • G02B6/29361Interference filters, e.g. multilayer coatings, thin film filters, dichroic splitters or mirrors based on multilayers, WDM filters
    • G02B6/29368Light guide comprising the filter, e.g. filter deposited on a fibre end
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B6/00Light guides
    • G02B6/24Coupling light guides
    • G02B6/36Mechanical coupling means
    • G02B6/38Mechanical coupling means having fibre to fibre mating means
    • G02B6/3801Permanent connections, i.e. wherein fibres are kept aligned by mechanical means
    • G02B6/3806Semi-permanent connections, i.e. wherein the mechanical means keeping the fibres aligned allow for removal of the fibres
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B6/00Light guides
    • G02B6/24Coupling light guides
    • G02B6/36Mechanical coupling means
    • G02B6/38Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807Dismountable connectors, i.e. comprising plugs
    • G02B6/3833Details of mounting fibres in ferrules; Assembly methods; Manufacture
    • G02B6/3845Details of mounting fibres in ferrules; Assembly methods; Manufacture ferrules comprising functional elements, e.g. filters
    • GPHYSICS
    • G02OPTICS
    • G02BOPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
    • G02B6/00Light guides
    • G02B6/24Coupling light guides
    • G02B6/36Mechanical coupling means
    • G02B6/38Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807Dismountable connectors, i.e. comprising plugs
    • G02B6/3833Details of mounting fibres in ferrules; Assembly methods; Manufacture
    • G02B6/3846Details of mounting fibres in ferrules; Assembly methods; Manufacture with fibre stubs

Abstract

PROBLEM TO BE SOLVED: To provide an optical connector that can be assembled with good workability by using a normal optical connector and a ferrule, can block and/or reflect light at a predetermined wavelength by use of a dielectric multilayer film filter, and can facilitate fiber identification or a test of an optical fiber line.SOLUTION: In the optical connector, a front end of a short optical fiber 12 is inserted and fixed to a ferrule 11; and an end face at an end of a connecting optical fiber 13 is abutted and spliced by a mechanical splicer 16 to an end face at a rear end protruding from the rear side of the ferrule. A dielectric multilayer film filter 15 that blocks and/or reflects light at a predetermined wavelength and transmits light at other wavelengths is directly formed by vapor deposition on an end face 12a at a rear end of the short optical fiber 12. The light at a predetermined wavelength is, for example, visible light or a test light at a wavelength of 1650 nm.

Description

  The present invention relates to an optical connector provided with a dielectric multilayer filter.

  In an optical wiring board or the like that forms an optical wiring network, core line contrast is performed in order to identify an optical fiber by laying a new optical fiber or changing a connection. For example, in Patent Document 1, optical fiber cores can be compared without disconnecting the optical connection member and maintaining the optical communication state, and the optical fiber core wire is physically connected. An optical connector for performing a core contrast without giving a bend or distortion is disclosed.

  An optical connector 1 shown in FIG. 2A is an example of the optical connector disclosed in the above-mentioned Patent Document 1, and the end of the bare fiber 3 from which the coating of the optical fiber core wire is removed is inserted into the ferrule 2. Adhering and integrating, the ferrule 2 is held by a ferrule presser 5 and attached to the connector housing 6. In the ferrule 2, a slit 2a is inserted so as to divide the bare fiber 3 in the ferrule, and a reflection filter (dielectric multilayer filter) 4 that reflects visible light is inserted in the slit 2a. When visible light is sent into the optical fiber core toward the optical connector 1 side, it is reflected outside the optical fiber by the reflection filter 4 and can be emitted to the outside of the optical connector through the window 7 of the connector housing 6. Can perform a core contrast. It should be noted that even if signal light is simultaneously transmitted in addition to visible light, it is possible to communicate through the reflection filter 4.

  FIG. 2B is an example in which the reflection filter 4 is inserted into the ferrule 2 in the connector 1 described above. The slit 2a into which the reflection filter 4 is inserted is formed by inserting a bare fiber 3 into the fiber hole of the ferrule 2 and bonding and integrating it, and then making a cut at a predetermined angle θ so as to cross the ferrule axis. The fiber 3 is formed so as to be divided. The inclination angle θ of the slit 2a is set to an angle that prevents visible light that has traveled straight through the optical fiber from returning into the optical fiber.

Patent Document 2 discloses an optical connector with a filter in which an optical fiber is butt-connected in a ferrule, a dielectric multilayer filter film is provided between the butt surfaces, and wavelength selectivity is provided.
FIG. 2 (C) is a diagram schematically showing the optical connector disclosed in the above-mentioned Patent Document 2, and the two short optical fibers 3a and 3b are inserted into the ferrule 2 so as to be butt-connected, A filter film 4a made of a dielectric multilayer film is formed in advance by vapor deposition on one or both end faces to be butt-connected.

  The other end face of the short optical fiber 3b disposed on the rear side of the ferrule 2 is connected to the bare fiber 3 from which the coating of the optical fiber cord or the like is removed, and a cord fixing portion (boots) disposed on the rear portion of the optical connector. (Also called). It is also disclosed that the abutting end surface of the short optical fibers 3a and 3b is an inclined surface as in the case of FIG. In addition, since the filter film 4a is formed by vapor deposition, it is not necessary to process a slit as shown in FIG.

  In addition, an optical connector may use a mechanical splice that is easy to connect on site, for example, as disclosed in Patent Document 3, to connect a bare optical fiber in a ferrule to an optical fiber cord. This mechanical splice generally has a structure in which optical fibers connected to each other are bare, positioned and butted by a V groove on a base member, and a cover member is pressed by a spring member from above the V groove.

JP 2008-83622 A JP-A-11-231139 JP-A-11-160563

2A and 2B, the ferrule (usually formed of ceramic such as zirconia) must be cut to form a slit, and one filter member is formed in a minute slit. There is a problem that it takes a long time to manually insert and fix them one by one. On the other hand, by using the configuration of FIG. 2C, the above work can be improved, but on the other hand, it is necessary to insert two short optical fibers into the ferrule and two butt connections. Therefore, it is necessary to increase the optical connection loss and to perform connection alignment twice.
2B and 2C, since the filter member is arranged in the ferrule, the ferrule is used with a member having a different size, shape, etc. from a normal optical connector. This is necessary and increases costs.

  The present invention has been made in view of the above-described circumstances, and can be assembled with good workability using a normal optical connector and a ferrule, and can block and reflect light of a predetermined wavelength by a dielectric multilayer film filter, thereby providing an optical fiber. An object of the present invention is to provide an optical connector that can easily perform the control of the cores of the track and the test.

  In the optical connector according to the present invention, the front end portion of the short optical fiber is inserted and fixed to the ferrule, and the end surface of the end portion of the connecting optical fiber is abutted and connected by the mechanical splicer to the end surface of the rear end portion protruding from the rear of the ferrule. A dielectric multilayer filter that blocks and reflects light of a predetermined wavelength and transmits light of other wavelengths is directly formed by vapor deposition on the end face of the rear end of the short optical fiber. It is characterized by.

  Visible light may be used for the predetermined wavelength, and a member around the optical fiber butt connection portion of the mechanical splicer may be formed of a member that leaks visible light to the outside to perform the contrast control. In this case, it is preferable that the end surface of the rear end portion of the short optical fiber is obliquely polished. Further, a test of an optical fiber line may be performed using test light having a wavelength of 1625 nm or 1650 nm as the light having the predetermined wavelength.

  According to the present invention, since there is no dielectric multilayer filter in the ferrule, a ferrule having a normal size and shape can be used. In addition, the dielectric multilayer filter is formed on the end face of the rear end protruding from the ferrule, and an optical fiber such as an optical fiber cord may be butt-connected to the end face. Can be assembled with good workability.

It is a figure explaining the outline of the optical connector by this invention. It is a figure explaining a prior art.

  An embodiment of the present invention will be described with reference to FIG. In the figure, 10 is an optical connector, 11 is a ferrule, 12 is a short optical fiber, 12a is an end face, 13 is a cord optical fiber, 14 is an optical fiber cord, 15 is a dielectric multilayer filter, 16 is a mechanical splice, and 17 is a base. Member, 17a is a ferrule holding portion, 17b is a V groove, 18 is a cover member, 19a and 19b are clamp members, 20 is a coil spring, 21 is a front case, 22 is a rear case, 23 is a boot, and 24 is a recess. , 25 indicate wedge members.

  For example, as disclosed in Patent Document 3, the optical connector 10 includes a ferrule 11 in which a short optical fiber 12 is inserted and fixed, and an optical fiber cord 14 is connected by a mechanical splice 16. The front end portion, which is one end portion of the short optical fiber 12, is inserted and fixed so as to be positioned at the front end in the ferrule 11, and the rear end portion, which is the other end portion of the short optical fiber 12, is located behind the ferrule 11. The optical fiber cord 14 for connection (hereinafter referred to as a cord optical fiber) 13 is butt-connected.

  The ferrule 11 is held by a ferrule holding portion 17 a formed integrally with a base member 17 of a mechanical splice 16 that butt-connects the short optical fiber 12 and the cord optical fiber 13. The mechanical splice 16 includes a base member 17, a cover member 18, and clamp members 19a and 19b. A V-groove 17b is formed in the base member 17 as shown in the section aa. In this V groove 17 b, the rear end portion of the short optical fiber 12 and the end surface of the end portion of the cord optical fiber 13 that are butt-connected to each other are put into contact with each other and are pressed by the cover member 18.

  The joint surfaces of the base member 17 and the cover member 18 are closed by clamp members 19a and 19b having a U-shaped cross section formed of, for example, a spring metal material. When the optical fibers are butt-connected, the wedge member 25 is inserted into the recess 24 formed between the base member 17 and the cover member 18 to push the joint surface open, and the short optical fiber 12 and the cord optical fiber 13 are inserted into the V groove 17b. Are inserted, and the end faces are butted and aligned. Thereafter, by removing the wedge member 25 from the recess 24, the joint surfaces of the base member 17 and the cover member 18 are closed by the clamp members 19a and 19b, and the butt connection state of the short optical fiber 12 and the cord optical fiber 13 is fixed. Is done.

In the state where the short optical fiber 12 and the cord optical fiber 13 are butt-connected as described above, and the ferrule 11 is held by the ferrule holding portion 17a formed integrally with the base member 17 of the mechanical splice 16, the front housing 21 And the rear housing 22, and the assembly as the optical connector 10 is completed.
The ferrule 11 and the mechanical splice 16 are urged toward the front side of the housing by the coil spring 20 so that the ferrule 11 can move into the housing. Further, an elastic boot 23 is placed on the rear portion of the optical connector 10 to protect and fix the lead-out end portion of the optical fiber cord 14.

  The present invention is an optical connector 10 configured as described above. As shown in the partially enlarged view of the figure, a dielectric multilayer is formed on an end face 12a of a rear end portion of a short optical fiber 12 that is butt-connected to a cord optical fiber 13. The membrane filter 15 is formed by vapor deposition. The dielectric multilayer filter 15 is a filter that blocks or reflects light of a predetermined wavelength and transmits light of other wavelengths. The dielectric multilayer filter 15 is preferably formed in advance on the end surface 12a of one end of the short optical fiber 12 by vapor deposition, and then inserted and fixed to the ferrule 11.

  In general, light having a wavelength band of 1310 nm and 1550 nm is used as signal light for optical communication. As the dielectric multilayer filter 15, for example, a filter that transmits light in the above-described wavelength band but blocks or reflects visible light (wavelength 400 nm to 750 nm) is used. Then, the members around the butt connection portion between the short optical fiber 12 and the cord optical fiber 13 in which the dielectric multilayer filter 15 is arranged are formed of a material that can transmit visible light, and the visible light is transmitted to the outside. It forms with the member which has the window part which emits light. In this case, the end face 12a of the short optical fiber 12 is obliquely polished to prevent the visible light reflected by the dielectric multilayer filter 15 from returning to the transmission side and to increase the amount of emitted light to the outside. It is preferable to have a form having

  The optical connector configured as described above is visible toward the optical connector while the optical connector is connected to an optical wiring board or an optical device, and further, while maintaining the optical communication state with the wavelengths of 1310 nm and 1550 nm. By sending out the light, it is possible to perform a cord contrast. The cord control is performed by visually observing the leaked light that has been cut off and reflected by the dielectric multilayer filter 15 at the portion that is butt-connected by the mechanical splicer 16. Similarly, cord contrast can be performed.

  Also, in-service tests are being conducted in the maintenance management of the optical wiring network. This in-service test refers to sending test light to an optical fiber line so as not to affect communication in the state of optical communication, and measuring optical loss of the optical fiber line remotely by ODTR (optical pulse test) or the like. This is a test to detect the fault location. As test light in this in-service test, a wavelength of 1625 nm or 1650 nm that is separated from the wavelength bands of 1310 nm and 1550 nm is usually used. However, it is necessary to block and reflect the test light so that it is not received by the subscriber terminal unit (ONU).

  Therefore, the dielectric multilayer filter 15 of the optical connector described above uses a filter that blocks or reflects test light having a wavelength of 1625 nm or 1650 nm and transmits signal light having wavelengths of 1310 nm and 1550 nm. Service tests can be easily performed. Note that the test light reflected and returned by the dielectric multilayer filter 15 is detected by ODTR or the like on the transmission side, thereby making it possible to measure the optical loss and detect the failure location.

  An optical connector having a dielectric multilayer filter configured as described above eliminates the need for a cutting process for forming a slit in the ferrule and a work for inserting the dielectric multilayer filter in the slit, thereby reducing the manufacturing cost. Can be reduced. It should be noted that the deposition of the dielectric multilayer filter on the end face of the short optical fiber can be performed in a lump, and the cost is low.

Also, the short optical fiber itself is the same as the conventional short optical fiber, and after forming a dielectric multilayer filter on the end face of one end, the other end is inserted into a ferrule and bonded and fixed. Therefore, the same size and shape as the conventional product can be used, and the assembly can be performed in the same manner.
Further, the same dimensions and shapes of the base member and cover member of the mechanical splice can be used as in the conventional product. Further, since the base member and the cover member are usually made of resin, even when these members are formed of a light-transmitting resin, the same mold can be used without increasing the cost, and the member cost is increased. Can be reduced.

DESCRIPTION OF SYMBOLS 10 ... Optical connector, 11 ... Ferrule, 12 ... Short optical fiber, 12a ... End face, 13 ... Cord optical fiber, 14 ... Optical fiber cord, 15 ... Dielectric multilayer filter, 16 ... Mechanical splice, 17 ... Base member, 17a ... Ferrule holding part, 17b ... V groove, 18 ... Cover member, 19a, 19b ... Clamp member, 20 ... Coil spring, 21 ... Front housing, 22 ... Rear housing, 23 ... Boot, 24 ... Recess, 25 ... Wedge member.

Claims (4)

  1. An optical connector in which a front end portion of a short optical fiber is inserted and fixed to a ferrule, and an end surface of a connecting optical fiber is abutted and connected to an end surface of a rear end portion protruding from the rear of the ferrule by a mechanical splicer. ,
    An optical connector characterized in that a dielectric multilayer filter that blocks or reflects light of a predetermined wavelength and transmits light of another wavelength is directly formed on the end face of the rear end portion of the short optical fiber by vapor deposition. .
  2.   The said predetermined wavelength is visible light, The member of the periphery of the optical fiber butt | matching connection part of the said mechanical splicer is formed with the member which leaks the said visible light outside, The Claim 1 characterized by the above-mentioned. Optical connector.
  3.   The optical connector according to claim 1, wherein an end surface of a rear end portion of the short optical fiber is obliquely polished.
  4.   The optical connector according to claim 1, wherein the light having the predetermined wavelength is test light having a wavelength of 1625 nm or 1650 nm.
JP2012139749A 2012-06-21 2012-06-21 Optical connector Pending JP2014006281A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2012139749A JP2014006281A (en) 2012-06-21 2012-06-21 Optical connector

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2012139749A JP2014006281A (en) 2012-06-21 2012-06-21 Optical connector
PCT/JP2013/067030 WO2013191268A1 (en) 2012-06-21 2013-06-21 Optical connector

Publications (1)

Publication Number Publication Date
JP2014006281A true JP2014006281A (en) 2014-01-16

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Family Applications (1)

Application Number Title Priority Date Filing Date
JP2012139749A Pending JP2014006281A (en) 2012-06-21 2012-06-21 Optical connector

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JP (1) JP2014006281A (en)
WO (1) WO2013191268A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106680943A (en) * 2017-02-22 2017-05-17 深圳新飞通光电子技术有限公司 Optical fiber connector with light filtering performance and manufacturing method of optical fiber connector

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3615924B2 (en) * 1998-02-12 2005-02-02 株式会社フジクラ Filtered optical connector and its manufacturing method
JP2004286843A (en) * 2003-03-19 2004-10-14 Japan Aviation Electronics Industry Ltd Filter incorporated optical connector
JP2005003871A (en) * 2003-06-11 2005-01-06 Fujikura Ltd Optical connector
US7104702B2 (en) * 2004-03-24 2006-09-12 Corning Cable Systems Llc Field installable optical fiber connector
JP4886453B2 (en) * 2006-09-29 2012-02-29 住電オプコム株式会社 Optical connecting member and method of contrasting core wire
JP2009103838A (en) * 2007-10-22 2009-05-14 Fujikura Ltd Optical connector adaptor
JP4967144B2 (en) * 2008-01-28 2012-07-04 住電オプコム株式会社 Optical connector

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106680943A (en) * 2017-02-22 2017-05-17 深圳新飞通光电子技术有限公司 Optical fiber connector with light filtering performance and manufacturing method of optical fiber connector

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WO2013191268A1 (en) 2013-12-27

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