WO2012121006A1 - 光接続器 - Google Patents
光接続器 Download PDFInfo
- Publication number
- WO2012121006A1 WO2012121006A1 PCT/JP2012/054156 JP2012054156W WO2012121006A1 WO 2012121006 A1 WO2012121006 A1 WO 2012121006A1 JP 2012054156 W JP2012054156 W JP 2012054156W WO 2012121006 A1 WO2012121006 A1 WO 2012121006A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- fiber
- optical
- connection member
- fibrous filler
- optical fiber
- 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
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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
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/38—Mechanical coupling means having fibre to fibre mating 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
- G02B6/36—Mechanical coupling means
- G02B6/38—Mechanical coupling means having fibre to fibre mating means
- G02B6/3807—Dismountable connectors, i.e. comprising plugs
- G02B6/3833—Details of mounting fibres in ferrules; Assembly methods; Manufacture
- G02B6/3846—Details of mounting fibres in ferrules; Assembly methods; Manufacture with fibre stubs
-
- 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
- G02B6/3801—Permanent connections, i.e. wherein fibres are kept aligned by mechanical means
- G02B6/3806—Semi-permanent connections, i.e. wherein the mechanical means keeping the fibres aligned allow for removal of the 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
- G02B6/36—Mechanical coupling means
- G02B6/38—Mechanical coupling means having fibre to fibre mating means
- G02B6/3807—Dismountable connectors, i.e. comprising plugs
- G02B6/381—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres
- G02B6/3818—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres of a low-reflection-loss type
- G02B6/382—Dismountable connectors, i.e. comprising plugs of the ferrule type, e.g. fibre ends embedded in ferrules, connecting a pair of fibres of a low-reflection-loss type with index-matching medium between light guides
Definitions
- the present invention relates to an optical connector for connecting optical fibers.
- an optical connector described in Patent Document 1 As a conventional optical connector, for example, an optical connector described in Patent Document 1 is known.
- the optical connector described in Patent Document 1 includes a ferrule holding a built-in optical fiber, and a connection mechanism (mechanical splice) extending to the opposite side of the connection end face of the ferrule.
- the connection mechanism includes a base on which a positioning groove for positioning an optical fiber to be connected to the built-in optical fiber is formed, a lid portion facing the base, and a C-shaped flat spring which elastically clamps the base and the lid portion. And consists of.
- the base and the lid are formed of a 40% glass fiber polyetherimide resin.
- An object of the present invention is to provide an optical connector capable of suppressing a reduction in the strength of optical fibers when mechanically connecting the optical fibers.
- An optical connector according to the present invention is an optical connector provided with a fiber connection member for mechanically connecting optical fibers.
- the fiber connection member is formed of an amorphous resin to which a fibrous filler having a Mohs hardness smaller than that of the material forming the optical fiber is added.
- a filler is added to the resin material forming the fiber connection member in order to improve mechanical properties and thermal properties.
- the filler tends to appear on the surface of the fiber connection member. Therefore, in the present invention, the fibrous filler is softer than the optical fiber by forming the fiber connection member with the non-crystalline resin to which the fibrous filler having a smaller Mohs hardness than the material forming the optical fiber is added. Therefore, when mechanically connecting the optical fibers with each other by the fiber connection member, even if the fibrous filler present on the surface of the fiber connection member contacts the optical fiber, the surface of the optical fiber is not easily damaged. Thereby, the strength of the optical fiber can be secured.
- the Mohs hardness of the fibrous filler is less than 5.
- the Morse hardness of quartz glass is about 7. Therefore, when the optical fiber is formed of quartz glass, the fibrous filler becomes sufficiently softer than the optical fiber by setting the Mohs hardness of the fibrous filler to less than 5.
- the non-crystalline resin is a polyetherimide or polyether sulfone.
- the heat resistance of the noncrystalline resin can be increased.
- the fibrous filler comprises only potassium titanate or a mixture of potassium titanate and wollastonite.
- a fibrous filler having a Mohs hardness of less than 5 can be obtained.
- the filling ratio of the fibrous filler to the non-crystalline resin is preferably 25 to 35%.
- the coefficient of linear expansion and the amount of bending and breaking deflection of the fiber connection member can be set to appropriate values.
- the fiber connection member has a base portion having a fiber groove for accommodating the optical fiber, and a lid portion for holding the optical fiber accommodated in the fiber groove against the base portion, and the base portion includes the optical fiber
- the ferrule holding the built-in fiber that constitutes one of the two is fixed.
- the optical connector can be used as a field mounted optical connector.
- the present invention it is possible to suppress the decrease in the strength of the optical fiber when mechanically connecting the optical fibers. This makes it possible to improve the reliability of the optical fiber while securing the characteristics required for mechanically connecting the optical fibers.
- FIG. 1 is a schematic cross-sectional view showing an embodiment of an optical connector. It is sectional drawing which shows the switching state of the mechanical splice with a ferrule shown in FIG. It is a graph which shows an example of the Weibull plot of fiber breaking strength. It is a graph which shows an example of correlation with the filling factor of a fibrous filler, the linear expansion coefficient of a PEI molded article, and the amount of bending fracture bending
- FIG. 1 is a schematic cross-sectional view showing an embodiment of an optical connector.
- the optical connector 1 of the present embodiment is an optical connector of mechanical splice type.
- the optical connector 1 includes a ferrule-attached mechanical splice 2 that mechanically connects and fixes the optical fibers, and a housing (not shown) that covers the ferrule-attached mechanical splice 2.
- the mechanical splice 2 with ferrule is housed in the fiber groove 4 as shown in FIG. 1 and FIG.
- a cover 6 for holding the optical fiber 3 against the base 5 and a clamp spring 7 having a U-shaped cross section sandwiching the base 5 and the cover 6 are provided.
- the base 5 and the lid 6 constitute a fiber connection member 8 made of resin.
- the tip portion of the optical fiber 3 is stripped and the bare fiber 3a is exposed.
- Bare fiber 3a is formed of quartz glass.
- a ferrule 9 is fixed to the front end of the base 5.
- the ferrule 9 holds a short internal fiber 10.
- the built-in fiber 10 has the same configuration as the above-described bare fiber 3 a, and extends from the front end face (connection end face) of the ferrule 9 to the fiber groove 4 of the fiber connection member 8.
- a plurality of wedge insertion recesses 12 into which the wedge member 11 is inserted are provided.
- the fiber connection member 8 is sandwiched by the clamp spring 7 from the opposite side of the wedge insertion recess 12.
- the optical fiber 3 is introduced into the fiber connection member 8 from the rear side of the ferrule-equipped mechanical splice 2, and the tip end face of the optical fiber 3 is abutted against the built-in fiber 10.
- the inside of the fiber connection member 8 is filled with a refractive index matching agent S for eliminating an optical discontinuity between the optical fiber 3 and the built-in fiber 10.
- the wedge member 11 is removed from the wedge insertion recess 12. Then, the base portion 5 and the lid portion 6 are closed by the biasing force of the clamp spring 7 and the optical fiber 3 and the built-in fiber 10 are optically connected to each other via the refractive index matching agent S. It will be pressed and fixed by the cover 5 and the cover 6.
- the base portion 5 and the lid portion 6 are formed of a non-crystalline resin to which a fibrous filler is added.
- a non-crystalline resin it is preferable to use an engineering plastic resin such as polyetherimide (PEI) or polyether sulfone (PES) having high heat resistance.
- the fibrous filler one having a Mohs hardness smaller than that of the quartz glass forming the optical fiber 3, preferably one having a Mohs hardness smaller than 5 is used.
- the Mohs hardness is an index showing the hardness of a substance, and the smaller the hardness, the smaller the hardness when the minerals are rubbed against each other.
- fibrous fillers include potassium titanate whiskers (KTW).
- KTW potassium titanate whiskers
- needle-like fillers such as wollastonite, aluminum borate, basic magnesium sulfate (MOS), zonolite, zinc oxide and the like may be used, and other properties are imparted.
- a plate-like or spherical filler having a low Mohs hardness may be added.
- the fiber connection member was formed of PEI whisker resin obtained by adding potassium titanate whisker to polyetherimide, and various characteristics were actually evaluated. The evaluation results are described below.
- the breaking strength of the optical fiber was evaluated. Specifically, with the optical fiber from which the coating on the middle part has been removed set in the fiber groove of the fiber connection member and the cover held down by the cover against the base, a constant load (approximately 5 N) by the clamp spring Add Thereafter, the optical fiber was removed from the fiber connection member, the optical fiber was set in a fiber tensile tester, and a tensile force was applied to the optical fiber to measure the load when the optical fiber broke (fiber break strength).
- the resin material for forming the fiber connection member As the resin material for forming the fiber connection member, the above-mentioned PEI whisker resin, PEI / GF resin formed by adding glass fiber (GF) to polyetherimide, and PEI-N not adding filler to polyetherimide Three types of (natural) resin were used. The Weibull plot of the fiber breaking strength at that time is shown in FIG.
- the 50% breaking strength of the optical fiber was 20 to 30 N for PEI whisker resin, about 5 N for PEI ⁇ GF resin, and about 30 N for PEI-N resin. It is considered that the surface of the optical fiber is scratched by the glass fiber because the breaking strength of the PEI / GF resin is smaller than that of the PEI whisker resin and the PEI-N resin. Since the breaking strengths of the PEI whisker resin and the PEI-N resin are almost equal, it is understood that the potassium titanate whisker having a low Mohs hardness hardly damages the optical fiber.
- the filling ratio (blending amount) of the fibrous filler to the non-crystalline resin is preferably 25 to 35 wt%.
- the blending amount of potassium titanate whisker is 30 wt%.
- the ground that the blending amount of the fibrous filler is preferably 25 to 35 wt% is as follows.
- FIG. 4A shows the correlation between the filling ratio of the fibrous filler to the non-crystalline resin and the linear expansion coefficient of the PEI molded product (fiber connection member).
- the linear expansion coefficient of the PEI molded product In mechanical splices, it is common for the resin to flow and be oriented along the longitudinal direction of the fiber groove during molding. Therefore, FIG. 4A shows the linear expansion coefficient in the resin flow direction (MD) of the PEI molded product.
- MD resin flow direction
- the linear expansion coefficient of the fiber connection member is, for example, 1 ⁇ 10 ⁇ 5 to 3 ⁇ 10 ⁇ 5 / K.
- the optical connector is dropped from a certain height, and the presence or absence of appearance abnormality and the optical characteristics (loss fluctuation amount) are evaluated at that time.
- Tensile strength, bending strength, etc. are one of the indications of mechanical strength.
- FIG. 4 (b) shows the correlation between the filling ratio of the fibrous filler to the non-crystalline resin and the bending fracture deflection amount of the PEI molded product (fiber connection member).
- the bending fracture deflection amount decreases (toughness decreases) as the addition amount of the fibrous filler increases, the impact resistance decreases.
- the filling ratio of the fibrous filler to the non-crystalline resin is preferably 35% or less.
- the bending rupture deflection of the fiber connection member is, for example, 1 to 4%.
- FIG. 5A shows the correlation between the filling ratio of the fibrous filler to the non-crystalline resin and the surface roughness Rz of the PEI molded product (fiber connection member).
- FIG. 5 (a) shows the larger the amount of fibrous filler added, the larger (rougher) the surface roughness.
- FIG. 5 (b) shows the correlation between the filling ratio of the fibrous filler to the non-crystalline resin and the fiber drawing force of the PEI molded article (fiber connecting member).
- the fiber drawing power fiber holding power
- the surface roughness Rz of the portion of the fiber connection member in contact with the glass fiber is, for example, 1 to 8 ⁇ m.
- the surface roughness of the fiber connection member is large, and the optical fiber and the fiber are used. Even if the frequency of contact with the fibrous filler is high, the strength of the optical fiber is hardly affected, so the degree of freedom of the amount of the fibrous filler is increased. Therefore, it becomes possible to fill many fibrous fillers with respect to non-crystalline resin.
- the fibrous filler is made of only potassium titanate whiskers, but, for example, a mixture of potassium titanate whiskers and wollastonite as the fibrous filler in order to suppress the occurrence of warpage of a resin molded product. May be used.
- the dimensional accuracy of the fiber connection member which is a resin molded product
- the filler filling amount with resin increases, and the dimensional change at the time of temperature change is small.
- the optical properties of are stabilized.
- the filling amount of the filler is large, the proportion of the filler appearing on the surface of the resin molded product is high.
- Moss hardness is almost equal (about 7) between glass fiber and quartz glass, so the following problems occur.
- the filler present on the surface of the fiber connection member may damage the bare fiber.
- a pulling force may act on the optical fiber due to the use environment. Therefore, it is possible that the fine flaws on the surface of the optical fiber are the starting point, the strength of the optical fiber is deteriorated, and in the worst case, the optical fiber is broken.
- the base portion 5 and the lid portion 6 as the fiber connection member 8 are formed of the non-crystalline resin to which the fibrous filler having a Mohs hardness smaller than that of the quartz glass is added Is sufficiently softer than the bare fiber 3a of the optical fiber 3. For this reason, when the optical fiber 3 is pressed and fixed by the mechanical splice 2 with a ferrule, the filler present on the surface of the fiber connection member 8 is unlikely to damage the bare fiber 3a. Therefore, the mechanical strength of the optical fiber 3 is secured even if the pulling force acts on the optical fiber 3.
- the strength reliability of the optical fiber 3 is improved while securing the properties (optical property, mechanical strength, optical fiber holding power) necessary for the mechanical splice 2 with ferrule. be able to.
- the present invention is not limited to the above embodiment.
- the optical connector 1 of the above embodiment is a mechanical splice type optical connector for connecting the optical fiber 3 to the built-in fiber 10
- the present invention introduces two optical fibers into the mechanical splice from both sides. It is applicable also to the thing of a connection and fixation type.
- the present invention is also applicable to optical connectors such as MT connector ferrules and optical positioning members, in addition to mechanical splices in which optical fibers are mechanically connected and fixed.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Mechanical Coupling Of Light Guides (AREA)
Abstract
Description
Claims (6)
- 光ファイバ同士を機械的に接続するためのファイバ接続部材を備えた光接続器において、
前記ファイバ接続部材は、前記光ファイバを形成する材料よりもモース硬度が小さい繊維状フィラーが添加された非結晶性樹脂で形成されている、光接続器。 - 前記繊維状フィラーのモース硬度は5よりも小さい、請求項1記載の光接続器。
- 前記非結晶性樹脂は、ポリエーテルイミドまたはポリエーテルサルフォンである、請求項1または2記載の光接続器。
- 前記繊維状フィラーは、チタン酸カリウムのみ、またはチタン酸カリウムとワラストナイトとの混合物からなっている、請求項1~3のいずれか一項記載の光接続器。
- 前記非結晶性樹脂に対する前記繊維状フィラーの充填率は25~35%である、請求項4記載の光接続器。
- 前記ファイバ接続部材は、前記光ファイバを収容するファイバ溝を有するベース部と、前記ファイバ溝に収容された前記光ファイバを前記ベース部に対して押さえる蓋部とを有し、
前記ベース部には、前記光ファイバの一つを構成する内蔵ファイバを保持するフェルールが固定されている、請求項1~5のいずれか一項記載の光接続器。
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012800121293A CN103403595A (zh) | 2011-03-07 | 2012-02-21 | 光连接器 |
| KR1020137023277A KR20140024852A (ko) | 2011-03-07 | 2012-02-21 | 광접속기 |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2011049285A JP5727266B2 (ja) | 2011-03-07 | 2011-03-07 | 光接続器 |
| JP2011-049285 | 2011-03-07 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO2012121006A1 true WO2012121006A1 (ja) | 2012-09-13 |
Family
ID=46797975
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/JP2012/054156 Ceased WO2012121006A1 (ja) | 2011-03-07 | 2012-02-21 | 光接続器 |
Country Status (4)
| Country | Link |
|---|---|
| JP (1) | JP5727266B2 (ja) |
| KR (1) | KR20140024852A (ja) |
| CN (1) | CN103403595A (ja) |
| WO (1) | WO2012121006A1 (ja) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104678507B (zh) * | 2013-12-03 | 2016-09-28 | 深圳日海通讯技术股份有限公司 | 预埋光纤的插芯加工方法、光纤插芯以及连接器 |
| CN107450131B (zh) * | 2017-08-24 | 2019-04-12 | 东莞福可喜玛通讯科技有限公司 | 一种弯曲光纤插芯及光纤弯曲的方法 |
| JP2020144309A (ja) * | 2019-03-08 | 2020-09-10 | 日本通信電材株式会社 | メカニカルスプライスおよび当該メカニカルスプライスを備えた光ファイバ接続構造 |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0954219A (ja) * | 1995-08-11 | 1997-02-25 | Nippon Telegr & Teleph Corp <Ntt> | 光コネクタ用プラスチック精密スリーブ |
| US5619605A (en) * | 1993-04-30 | 1997-04-08 | Sumitomo Electric Industries, Ltd | Optical connector |
| JPH09318842A (ja) * | 1996-03-29 | 1997-12-12 | Nippon Telegr & Teleph Corp <Ntt> | 光コネクタ用プラスチック割りスリーブおよびその製造方法 |
| JPH1031134A (ja) * | 1996-07-12 | 1998-02-03 | Nippon Telegr & Teleph Corp <Ntt> | 光コネクタ用プラスチック精密スリーブおよびその金型 |
| JPH11211934A (ja) * | 1998-01-28 | 1999-08-06 | Nippon Telegr & Teleph Corp <Ntt> | 光コネクタ用プラスチックフェルールおよびその製造方法 |
| JP2000273304A (ja) * | 1999-03-23 | 2000-10-03 | Idemitsu Petrochem Co Ltd | 光通信部品用ポリアリーレンスルフィド樹脂組成物 |
| JP2001174666A (ja) * | 1999-12-17 | 2001-06-29 | Furukawa Electric Co Ltd:The | 光フェルール |
| JP2001201665A (ja) * | 1999-11-09 | 2001-07-27 | Nippon Telegr & Teleph Corp <Ntt> | 変換コネクタ用プラスチック割りスリーブおよび精密スリーブ |
| WO2002083792A1 (en) * | 2001-04-13 | 2002-10-24 | Idemitsu Petrochemical Co., Ltd. | Polyarylene sulfide resin composition for optical communication part |
| JP2005082761A (ja) * | 2003-09-10 | 2005-03-31 | Asahi Kasei Chemicals Corp | 光学機器機構部品用樹脂組成物 |
| JP2010186058A (ja) * | 2009-02-12 | 2010-08-26 | Fujikura Ltd | 光コネクタ |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH07294772A (ja) * | 1994-04-26 | 1995-11-10 | Sumitomo Electric Ind Ltd | 光コネクタ |
| JPH06313824A (ja) * | 1993-04-30 | 1994-11-08 | Sumitomo Electric Ind Ltd | 光コネクタ |
| US6478476B1 (en) * | 1998-04-13 | 2002-11-12 | Sumitomo Electric Industries, Ltd. | Part for positioning optical fiber |
-
2011
- 2011-03-07 JP JP2011049285A patent/JP5727266B2/ja active Active
-
2012
- 2012-02-21 WO PCT/JP2012/054156 patent/WO2012121006A1/ja not_active Ceased
- 2012-02-21 KR KR1020137023277A patent/KR20140024852A/ko not_active Withdrawn
- 2012-02-21 CN CN2012800121293A patent/CN103403595A/zh active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5619605A (en) * | 1993-04-30 | 1997-04-08 | Sumitomo Electric Industries, Ltd | Optical connector |
| JPH0954219A (ja) * | 1995-08-11 | 1997-02-25 | Nippon Telegr & Teleph Corp <Ntt> | 光コネクタ用プラスチック精密スリーブ |
| JPH09318842A (ja) * | 1996-03-29 | 1997-12-12 | Nippon Telegr & Teleph Corp <Ntt> | 光コネクタ用プラスチック割りスリーブおよびその製造方法 |
| JPH1031134A (ja) * | 1996-07-12 | 1998-02-03 | Nippon Telegr & Teleph Corp <Ntt> | 光コネクタ用プラスチック精密スリーブおよびその金型 |
| JPH11211934A (ja) * | 1998-01-28 | 1999-08-06 | Nippon Telegr & Teleph Corp <Ntt> | 光コネクタ用プラスチックフェルールおよびその製造方法 |
| JP2000273304A (ja) * | 1999-03-23 | 2000-10-03 | Idemitsu Petrochem Co Ltd | 光通信部品用ポリアリーレンスルフィド樹脂組成物 |
| JP2001201665A (ja) * | 1999-11-09 | 2001-07-27 | Nippon Telegr & Teleph Corp <Ntt> | 変換コネクタ用プラスチック割りスリーブおよび精密スリーブ |
| JP2001174666A (ja) * | 1999-12-17 | 2001-06-29 | Furukawa Electric Co Ltd:The | 光フェルール |
| WO2002083792A1 (en) * | 2001-04-13 | 2002-10-24 | Idemitsu Petrochemical Co., Ltd. | Polyarylene sulfide resin composition for optical communication part |
| JP2005082761A (ja) * | 2003-09-10 | 2005-03-31 | Asahi Kasei Chemicals Corp | 光学機器機構部品用樹脂組成物 |
| JP2010186058A (ja) * | 2009-02-12 | 2010-08-26 | Fujikura Ltd | 光コネクタ |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20140024852A (ko) | 2014-03-03 |
| CN103403595A (zh) | 2013-11-20 |
| JP2012185383A (ja) | 2012-09-27 |
| JP5727266B2 (ja) | 2015-06-03 |
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