JPH02151821A - Coated optical fiber - Google Patents
Coated optical fiberInfo
- Publication number
- JPH02151821A JPH02151821A JP63305949A JP30594988A JPH02151821A JP H02151821 A JPH02151821 A JP H02151821A JP 63305949 A JP63305949 A JP 63305949A JP 30594988 A JP30594988 A JP 30594988A JP H02151821 A JPH02151821 A JP H02151821A
- Authority
- JP
- Japan
- Prior art keywords
- stress
- protective coat
- optical fiber
- clad
- cladding
- 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
Links
- 239000013307 optical fiber Substances 0.000 title claims abstract description 24
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 36
- 238000005253 cladding Methods 0.000 claims description 19
- 239000000377 silicon dioxide Substances 0.000 claims description 14
- 239000000463 material Substances 0.000 claims 1
- 239000011253 protective coating Substances 0.000 claims 1
- 230000003287 optical effect Effects 0.000 abstract description 25
- 230000001681 protective effect Effects 0.000 abstract description 21
- 239000010453 quartz Substances 0.000 abstract description 6
- 229920001169 thermoplastic Polymers 0.000 abstract description 4
- 239000004416 thermosoftening plastic Substances 0.000 abstract description 4
- 229920005989 resin Polymers 0.000 abstract description 2
- 239000011347 resin Substances 0.000 abstract description 2
- 239000000853 adhesive Substances 0.000 abstract 2
- 230000001070 adhesive effect Effects 0.000 abstract 2
- QLOAVXSYZAJECW-UHFFFAOYSA-N methane;molecular fluorine Chemical compound C.FF QLOAVXSYZAJECW-UHFFFAOYSA-N 0.000 abstract 1
- HJBYJZCUFFYSGA-UHFFFAOYSA-N prop-2-enoyl fluoride Chemical compound FC(=O)C=C HJBYJZCUFFYSGA-UHFFFAOYSA-N 0.000 abstract 1
- 230000005540 biological transmission Effects 0.000 description 6
- 150000001252 acrylic acid derivatives Chemical class 0.000 description 5
- 239000000835 fiber Substances 0.000 description 5
- 239000004677 Nylon Substances 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229920001778 nylon Polymers 0.000 description 4
- 239000004033 plastic Substances 0.000 description 3
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 2
- 239000011248 coating agent Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000002788 crimping Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 229910052710 silicon Inorganic materials 0.000 description 2
- 239000010703 silicon Substances 0.000 description 2
- 229920002050 silicone resin Polymers 0.000 description 2
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- -1 fluorinated acrylate Chemical compound 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000000704 physical effect Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は、光コネクタのかしめによる取り付は等により
応力が加えられても、破断せず、かつ、損失増加のしな
いように石英系光ファイバに保護コートを施した被覆光
ファイバに関する。[Detailed Description of the Invention] <Industrial Application Field> The present invention uses quartz-based optical fibers to prevent breakage and increase loss even when stress is applied to optical connectors by caulking. This invention relates to a coated optical fiber in which a protective coat is applied to the fiber.
〈従来の技術〉
従来、ＬＡＮ、ＦＡ等の距離の短かい伝送路に光ファイ
バを用いる場合、その曲げ特性、受発光素子との結合特
性及び価格から、大口径、高ＮＡを有するＡＰＦ （人
！１−Ｐｌａｓｔｉｃ−Ｆｉｂｅｒ）もしくはＰ ＣＦ
（Ｐｌａｓｔｉｃ−Ｃ：ｌａｄｄｉｎｇ−Ｆｉｂｅｒ
）が使用されてきた。<Conventional technology> Conventionally, when using optical fibers for short transmission lines such as LAN and FA, APFs with large diameters and high NA have been used due to their bending characteristics, coupling characteristics with light receiving/emitting elements, and cost. !1-Plastic-Fiber) or P CF
(Plastic-C:ladding-Fiber
) has been used.
光伝送機器間は、これらの光ファイバの両端に取り付け
られた光コネクタによって容易に接続されていた。光フ
ァ、イバの構成は、第２図に示すように、コア８はＡＰ
Ｆの場合はプラスチックであり、ＰＣＦの場合は石英で
ある。そして、ＡＰＦとＰＣＦのコア以外の構成は共通
であり、コア８は、プラスチックであり弾性体であるク
ラッド９に被覆されている。クラッド９はナイロンシー
ス１０によって被覆されており、ナイロンシース１０は
テンションメンバ５が巻き付けられ、更にシース６が被
覆されている。Optical transmission devices were easily connected by optical connectors attached to both ends of these optical fibers. As shown in Fig. 2, the configuration of the optical fiber and fiber is as shown in FIG.
In the case of F, it is plastic, and in the case of PCF, it is quartz. The APF and PCF have the same structure other than the core, and the core 8 is covered with a cladding 9 that is made of plastic and is an elastic body. The cladding 9 is covered with a nylon sheath 10, around which the tension member 5 is wound, and further covered with a sheath 6.
光ファイバに対する光コネクタの取り付けは短時間でな
ければならず、従来は、光コネクタの金属部をかしめる
ことによって光ファィバに圧着固定していた。ＡＰＦ及
びＰＣＦは、光コネクタを取り付けるために応力が付与
される部分が、矢印７で示すように共にプラスチックの
クラッド９であるために、このような光コネクタに適し
ている。Attaching an optical connector to an optical fiber must be done in a short time, and conventionally, the metal part of the optical connector is crimped and fixed to the optical fiber by caulking. APF and PCF are suitable for such optical connectors because the parts to which stress is applied for attaching the optical connectors are both plastic cladding 9 as shown by arrow 7.
〈発明が解決しようとする課題〉
上述した従来技術では、最近要求されるようになったＬ
ＡＮ、ＦＡ等の長距離化及び広帯域化に対しては、伝送
損失の大きさと耐熱性のｔこめＡＰＦもしくはＰＣＦで
は対応が困難となってきた。このため、光伝送機器間の
接続には石英系ファイバが要求される。しかし、第３図
に示すように、石英系光ファイバの構成はコア１に石英
系であるクラッド２を被覆し、クラッド２にシリコン系
保護コート１１を被覆し、シリコン系保護コート１１に
ナイロンシース１０を被覆し、ナイロンシース１０にテ
ンションメンバ５を巻き付け、更に、シース６を被覆し
ていた。従って石英系光ファイバに光コネクタを、その
金属部をかしめることによって固定するためには、従来
の石英系光ファイバの構造では、クラッド部分（石英系
）２に直接応力を加えなければならず、破断の確率が高
く、かつ、損失増加が大きいという問題点があった。<Problem to be solved by the invention> The above-mentioned prior art does not solve the problem of L, which has recently become required.
It has become difficult to cope with the longer distances and wider bands of AN, FA, etc. with APF or PCF due to their large transmission loss and heat resistance. For this reason, silica-based fibers are required for connections between optical transmission devices. However, as shown in FIG. 3, the structure of the silica-based optical fiber is that the core 1 is coated with a silica-based cladding 2, the cladding 2 is covered with a silicon-based protective coat 11, and the silicon-based protective coat 11 is covered with a nylon sheath. The tension member 5 was wound around the nylon sheath 10, and the sheath 6 was further covered. Therefore, in order to fix an optical connector to a silica-based optical fiber by caulking its metal part, in the conventional silica-based optical fiber structure, stress must be applied directly to the cladding part (quartz-based) 2. However, there were problems in that the probability of breakage was high and the increase in loss was large.
本発明は、上記問題点に鑑み、光コネクタの取り付けの
ために、応力を加えても破断の確率が低く、かつ損失増
加の小さい石英系光ファイバを提供することを目的とす
る。SUMMARY OF THE INVENTION In view of the above problems, an object of the present invention is to provide a silica-based optical fiber that has a low probability of breakage and a small increase in loss even when stress is applied, for attaching an optical connector.
く課題を解決するための手段〉
本発明は、上記目的を達成するために、部品をかしめて
取り付ける等により生じる応力を緩衝する弾性と、この
応力に耐える硬さを持ち、クラッド等の部材との密着強
度の大きい部材を保護コートとして石英系光ファイバの
クラッド等の部材に被覆したことを特徴とする。Means for Solving the Problems> In order to achieve the above object, the present invention has the elasticity to buffer the stress caused by caulking and attaching parts, the hardness to withstand this stress, and the like, and is suitable for use with members such as cladding. The present invention is characterized in that a member having a high adhesion strength is coated on a member such as a cladding of a silica-based optical fiber as a protective coat.
く作 用〉
上記構成の本発明によれば、例えば光コネクタの金属部
を保護コートにかしめ等により圧着固定しても、応力付
与部である保護コートが弾力性を持つため、加えられた
応力を吸収し石英系光ファイバが破断する確率が極めて
少なくなる。また、クラッドに保護コートが密着しその
密着強度が大きいため、引っ張り等の力を与えても光コ
ネクタの位置はずれない。そして、応力に耐えられる硬
さを持っているため、光コネクタ等の部品を圧着固定で
きる。Effect> According to the present invention having the above configuration, even if the metal part of an optical connector is crimped and fixed to the protective coat by caulking or the like, for example, the protective coat, which is the stress applying part, has elasticity, so that the applied stress is not absorbed. The probability that the silica-based optical fiber will break is extremely low. In addition, since the protective coat adheres closely to the cladding and its adhesion strength is high, the optical connector will not be displaced even if a force such as pulling is applied. Since it has the hardness to withstand stress, parts such as optical connectors can be crimped and fixed.
く実 施 例〉
以下、本発明の一実施例を図に従って説明する。尚、従
来の例と同一構成のものについては同一符号を用いる。Embodiment Hereinafter, an embodiment of the present invention will be described with reference to the drawings. Note that the same reference numerals are used for components having the same configuration as the conventional example.
第１図に於て、符号１はコアであり、石英系ガラスであ
る。コア１は径が５０μｍであり、石英系のクラッド２
が被覆されている。クラッド２の外径は１２５μｍであ
り、熱可塑性フッ素樹脂のフッ化アクリレ−□トを用い
た保護コート３を被覆している。保護コート３は石英系
光フアイバ用プリフォームを線引した直後１こ、フッ化
アクリレートを外径２００μｍまでプライマリコーティ
ング（第１次被覆）シ、更に、シリコン樹脂４を４００
μｍまでセカンダリコーティング（第２次被覆）した。In FIG. 1, reference numeral 1 denotes a core, which is made of quartz glass. The core 1 has a diameter of 50 μm, and the cladding 2 is made of quartz.
is covered. The outer diameter of the clad 2 is 125 μm, and it is coated with a protective coat 3 made of fluorinated acrylate □, which is a thermoplastic fluororesin. Immediately after drawing the silica-based optical fiber preform, protective coat 3 is coated with fluorinated acrylate to an outer diameter of 200 μm, and then silicone resin 4 is coated with 400 μm of fluorinated acrylate.
Secondary coating (secondary coating) was performed to a depth of μm.
そし、て、シリコン樹脂４にテンシリンメンバ５を巻き
付はナイロンのシース６で外径が０．９μｍになるまで
被覆した。Then, the tensile member 5 was wrapped around the silicone resin 4 and covered with a nylon sheath 6 until the outer diameter became 0.9 μm.
この時用いたフッ化アクリレートである保護コート３の
物性はヤング率８５ｋｇｆ／＋＋ｓ２、ショア硬度６５
Ｄ１屈折率１．４９である。The physical properties of the protective coat 3, which is fluorinated acrylate used at this time, are Young's modulus of 85 kgf/++s2 and Shore hardness of 65.
The D1 refractive index is 1.49.
この光フアイバケーブルの伝送特性及び温度変化による
伝送損失特性の変動等は従来の石英系光ファイバと同程
度であった。また、保護コート３を露出して、保護コー
ト３に光コネク′りを、その金属部をかしめることによ
って取り付けた場合は、矢印７で示す応力付与部は保護
コート３であるため応力が保護コート３の弾性によって
緩衝され、また、その硬度が応力に耐えられるため、多
少変形しながら層を維持するので光コネクタを圧着固定
できる。そして、その屈折率がクラッド２より大きいた
めのクラッドモードを除去する。The transmission characteristics of this optical fiber cable and fluctuations in transmission loss characteristics due to temperature changes were comparable to those of conventional silica-based optical fibers. In addition, if the protective coat 3 is exposed and the optical connector is attached to the protective coat 3 by caulking its metal part, the stress applying part shown by the arrow 7 is the protective coat 3, so the stress is not protected. It is buffered by the elasticity of the coat 3, and its hardness allows it to withstand stress, so the layer is maintained even though it is slightly deformed, so that the optical connector can be fixed by pressure. Then, the cladding mode whose refractive index is larger than that of cladding 2 is removed.
また、光コネクタの取付時の光フアイバケーブルに対す
るかしめによる損失増加は、測定誤差範囲内であり、破
断頻度は０となった。Furthermore, the increase in loss due to caulking of the optical fiber cable when attaching the optical connector was within the measurement error range, and the breakage frequency was zero.
以上のように、石英系光ファイバのクラッドに密着強度
が強く弾力性があり光コネクタ取り付は時のかしめ等に
よって加わる応力に対して圧着固定できる硬さを持つフ
ッ化アクリレート等の熱可塑性フッ素樹脂を被覆してい
るため、引っ張り等の応力に対して破断する確率が０に
近く、この光ファイバは光コネクタをかしめて取り付け
ろ必要のあるＬＡＮ。As mentioned above, the cladding of the silica-based optical fiber has strong adhesion strength and elasticity, and the optical connector can be attached using thermoplastic fluorine such as fluorinated acrylate, which has the hardness to be fixed by crimping against the stress applied during caulking, etc. Because it is coated with resin, the probability of it breaking due to stress such as tension is close to 0, and this LAN requires crimping the optical connector to attach it.
ＦＡなどの光通信システムの分野で効果的である。It is effective in the field of optical communication systems such as FA.
また、クラツド径１２５μｍの石英系光ファイバでは前
記保護コート３の厚さが７．５μｍ以上３７．５μｎ以
下でも、ヤング率が８５ ｋｇ ｆ ７ｍ：以上、ショ
ア硬度６．５Ｄ以上、および屈折率１．４９以上の熱可
塑性フッ素樹脂でも効果的である。Furthermore, in the case of a silica-based optical fiber with a cladding diameter of 125 μm, even if the thickness of the protective coat 3 is 7.5 μm or more and 37.5 μm or less, the Young's modulus is 85 kg f 7 m or more, the Shore hardness is 6.5 D or more, and the refractive index is 1. Thermoplastic fluororesin having a molecular weight of .49 or higher is also effective.
〈発明の効果〉
以上説明したように、クラッドに被覆されている保護コ
ートに、光コネクタを取り付けるために、応力を加えて
もその硬さと弾力性のため保護コートに圧着固定でき、
石英系光ファイバを破断する確率は０に近く、クラッド
に対する密着強度が大きいため、引っ張りゃ曲げ等に対
しても位置がずれない。<Effects of the Invention> As explained above, in order to attach an optical connector to the protective coat coated on the cladding, even if stress is applied, the optical connector can be crimped and fixed to the protective coat due to its hardness and elasticity.
The probability of breaking a silica-based optical fiber is close to 0, and since the adhesion strength to the cladding is high, the position will not shift even when stretched or bent.
このため、かしめ型の光コネクタを必要とするＬＡＮ、
ＦＡ等の光通信システムに効果的である。For this reason, LANs that require caulking type optical connectors,
Effective for optical communication systems such as FA.
第１図は本発明の実施例の構成図を示し、第２図と第３
図は従来の例を示し、夫々構成図である。
図 中、
１はコア、
２はクラッド、
３は保護コートである。FIG. 1 shows a configuration diagram of an embodiment of the present invention, and FIG.
The figures show conventional examples and are configuration diagrams. In the figure, 1 is the core, 2 is the cladding, and 3 is the protective coat.
Claims (1)
る弾性と、この応力に耐える硬さを持ち、クラッド等の
部材との密着強度の大きい部材を保護コートとして石英
系光ファイバのクラッド等の部材に被覆したことを特徴
とする被覆光ファイバ。A material that has the elasticity to buffer stress caused by caulking and attaching components, hardness to withstand this stress, and strong adhesion to components such as cladding is used as a protective coating to coat components such as cladding of silica-based optical fibers. A coated optical fiber characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63305949A JPH02151821A (en) | 1988-12-05 | 1988-12-05 | Coated optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63305949A JPH02151821A (en) | 1988-12-05 | 1988-12-05 | Coated optical fiber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02151821A true JPH02151821A (en) | 1990-06-11 |
Family
ID=17951234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63305949A Pending JPH02151821A (en) | 1988-12-05 | 1988-12-05 | Coated optical fiber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02151821A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7822307B1 (en) | 2009-04-07 | 2010-10-26 | Sumitomo Electric Industries, Ltd. | Optical fiber ribbon for wiring of equipment and connector-attached optical fiber ribbon for wiring of equipment |
-
1988
- 1988-12-05 JP JP63305949A patent/JPH02151821A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7822307B1 (en) | 2009-04-07 | 2010-10-26 | Sumitomo Electric Industries, Ltd. | Optical fiber ribbon for wiring of equipment and connector-attached optical fiber ribbon for wiring of equipment |
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