JPH0553035A - Cable for transmission of light signal by using multiple optical fiber - Google Patents
Cable for transmission of light signal by using multiple optical fiberInfo
- Publication number
- JPH0553035A JPH0553035A JP3210577A JP21057791A JPH0553035A JP H0553035 A JPH0553035 A JP H0553035A JP 3210577 A JP3210577 A JP 3210577A JP 21057791 A JP21057791 A JP 21057791A JP H0553035 A JPH0553035 A JP H0553035A
- Authority
- JP
- Japan
- Prior art keywords
- core
- optical fiber
- cable
- resin
- transmission
- 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.)
- Granted
Links
Landscapes
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はオーディオ、コンピユー
タ、ロボット、携帯用機器、車載用機器などの光信号伝
送に特殊な光ファイバケーブルを使用することに関する
ものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the use of special optical fiber cables for optical signal transmission in audio equipment, computers, robots, portable equipment, in-vehicle equipment and the like.
【０００２】[0002]
【従来の技術】プラスチック光ファイバを用いた、光通
信は汎用化されてきた。これらのプラスチック光ファイ
バケーブルは、通常一本の芯とその周りを薄く同心円状
に鞘を被覆した構造からなる光ファイバ裸線を熱可塑性
樹脂で被覆したものが使用されている。このようなプラ
スチック光ファイバでは、芯の直径は通常０．５〜１．
５ｍｍである。その他の光ファイバケーブルの構造とし
ては０．１〜０．２ｍｍ程度の細いプラスチック光ファ
イバを数１０本程度束にし、それを熱可塑性樹脂で被覆
したバンドルケーブルも使用されている。2. Description of the Related Art Optical communication using a plastic optical fiber has been generalized. In these plastic optical fiber cables, an optical fiber bare wire having a structure in which one core and a sheath around the core are thinly concentrically covered is usually coated with a thermoplastic resin. In such a plastic optical fiber, the diameter of the core is usually 0.5 to 1.
It is 5 mm. As another structure of the optical fiber cable, there is also used a bundle cable in which several tens of thin plastic optical fibers of 0.1 to 0.2 mm are bundled and covered with a thermoplastic resin.
【０００３】[0003]
【発明が解決しようとする課題】プラスチック光ファイ
バの特徴は、可撓性があるので口径の大きなファイバが
使用でき、大量の入射光が得られるので、簡単な端末処
理で光ファイバの接続が可能となる特徴がある。しか
し、光ファイバの口径が大きいことは、ファイバの曲げ
による光ロスが大きいという欠点にもなる。そこで、プ
ラスチック光ファイバの口径を小さくすれば、入射光量
が少なくなるということになって細いファイバでは数本
束ねる必要が生じる。しかしながら、ガラスファイバで
は細径化した光ファイバでも腰が強いのでバンドル化が
比較的容易であっても、プラスチック光ファイバの場合
には芯の直径が１００ミクロンを大きく下回るようなも
のでは綿毛のように腰がなく、静電気によって反発し、
ケーブル化はもとより、コネクターへの端末固定等のハ
ンドリングが繁雑となる。しかも、個々のプラスチック
光ファイバが相互に融着していないので部分的にズレが
生じたり、先端が飛び出したり、引っ込んだりして、光
量に大きな減少が生じたりする。さらに、このような細
いファイバを束ねた場合には、ファイバが断線し易く、
伝送損失が大きくなる。The characteristics of the plastic optical fiber are that since it has flexibility, a fiber having a large diameter can be used and a large amount of incident light can be obtained, so that the optical fiber can be connected by a simple terminal treatment. There is a characteristic that becomes. However, the large diameter of the optical fiber also has a drawback that the optical loss due to the bending of the fiber is large. Therefore, if the diameter of the plastic optical fiber is reduced, the amount of incident light is reduced, and it becomes necessary to bundle several thin optical fibers. However, even if the glass fiber is thin, it is relatively easy to bundle it, so that it is relatively easy to bundle it. Is not stiff, and repulsed by static electricity,
In addition to using cables, handling of fixing terminals to connectors becomes complicated. Moreover, since the individual plastic optical fibers are not fused to each other, a partial shift may occur, or the tip may pop out or retract, resulting in a large decrease in the light amount. Furthermore, when such thin fibers are bundled, the fibers are easily broken,
Transmission loss increases.
【０００４】[0004]
【課題を解決するための手段】本発明は屈折率の高い透
明な芯樹脂からなる、個々の芯の直径が５０ミクロン以
下であり、少なくとも５００個以上の多数の芯繊維が個
別に仕切られる様に、屈折率の低い鞘樹脂で充満され
て、一纏めにされた断面が、円状である多芯プラスチッ
ク光ファイバを熱可塑性樹脂で保護被覆し、光信号伝送
に適するケーブルに関する。According to the present invention, each core made of a transparent core resin having a high refractive index has a diameter of 50 microns or less, and at least 500 or more core fibers are individually partitioned. The present invention relates to a cable suitable for optical signal transmission, in which a multicore plastic optical fiber having a circular cross section filled with a sheath resin having a low refractive index is protectively coated with a thermoplastic resin.
【０００５】ここで用いる多芯光プラスチック光ファイ
バは、後述する既に公知のものではあるが、従来の多芯
光ファイバの用途はイメージファイバとしての利用で、
先端面に結像させた画像や光の強弱パターンの位置関係
を保持させつつ、他端面に像を送る用途に使用するもの
であり、個々の芯は画素として利用されているものであ
る。これに対し、本発明の多芯光ファイバの利用方法
は、個々の芯の配置を利用（画素として）するというこ
とではなく、全体の芯を一纏めにし、光データリンクの
送信モジュールから受信モジュールへ１組の光信号を送
るのに使用される点で異なる。The multicore optical plastic optical fiber used here is already known as will be described later, but the conventional multicore optical fiber is used as an image fiber.
It is used for sending an image to the other end surface while maintaining the positional relationship between the image formed on the front end surface and the intensity pattern of light, and each core is used as a pixel. On the other hand, the method of using the multi-core optical fiber of the present invention does not use the arrangement of individual cores (as pixels), but collects all cores from the transmission module to the reception module of the optical data link. They differ in that they are used to send a set of optical signals.
【０００６】本発明によれば、細い多数のプラスチック
光ファイバを多数束ねたものとは異なり、外見的にはあ
たかも１本の芯の光ファイバのように取り扱え、コネク
ターなどへの端末の固定方法は、保護被覆層のかしめや
接着剤による接着などででき、構成する芯がばらばらに
引っ込んだり、飛び出したりすることはない。本発明で
は使用する多芯プラスチック光ファイバは、屈折率の高
い透明な芯樹脂からなる、個々の芯の直径が５０ミクロ
ン以下であり、少なくとも５００個以上の多数の芯繊維
が個別に仕切られるように、屈折率の低い鞘樹脂で充満
されて一纏めにされた、断面が円状である多芯光ファイ
バである。その断面の直径は０．１ｍｍ〜２ｍｍ程度で
あり、通常は０．３ｍｍ〜１．０ｍｍ程度である。According to the present invention, unlike a bundle of a large number of thin plastic optical fibers, it can be handled as if it were a single core optical fiber, and a method of fixing a terminal to a connector or the like is The caulking of the protective coating layer and the bonding with an adhesive can be performed, and the constituent cores do not retract or pop out. The multi-core plastic optical fiber used in the present invention is made of a transparent core resin having a high refractive index, each core has a diameter of 50 microns or less, and at least 500 or more core fibers are individually partitioned. The multi-core optical fiber having a circular cross section filled with a sheath resin having a low refractive index and bundled together. The diameter of the cross section is about 0.1 mm to 2 mm, usually about 0.3 mm to 1.0 mm.
【０００７】ここで、芯の直径が５０ミクロンより大き
いと、ファイバの曲げに対する光ロスが大きいので出来
るだけ小さい方が良く、好ましい大きさとしては５ミク
ロンから４０ミクロン程度である。芯の数も５００以上
にして、出来るだけ断面の均一化をはかる必要がある。
このような構造からなる多芯光ファイバは多数の芯とそ
れを取り巻く鞘樹脂はしっかりと一体化され居り、断面
の直径が１ｍｍ程度の該多芯光ファイバを小さく折り曲
げても光ロスが極めて少ないという優れた特徴が見出さ
れた。そのロスは通常の単芯のプラスチック光ファイバ
で裸線の直径が１ｍｍ程度のものの曲げによる光ロスの
数分の１から数十分の一でしかない。Here, if the diameter of the core is larger than 50 μm, the optical loss due to bending of the fiber is large, so it is preferable that it is as small as possible, and the preferable size is about 5 to 40 μm. It is necessary to make the number of cores 500 or more to make the cross-section as uniform as possible.
In the multi-core optical fiber having such a structure, a large number of cores and the sheath resin surrounding the core are firmly integrated, and even if the multi-core optical fiber having a cross-sectional diameter of about 1 mm is bent small, the optical loss is extremely small. The excellent feature was found. The loss is only a fraction to a few tenths of the optical loss due to bending of an ordinary single-core plastic optical fiber having a bare wire diameter of about 1 mm.
【０００８】プラスチック光ファイバケーブルが敷設さ
れる所は、必ずしも固定された所だけではなく、携帯用
のオーデイオ機器であったり、車載用の機器であった
り、ロボットのような工作機械であったりすれば、振動
や運動によるケーブルの屈曲が生じることは避けられな
い。通常はそれらの変動を見越して十分な設計がなされ
てはいるが、ケーブルに何かを引っ掛けたときなどの様
に、極端な外乱がノイズとなる状況が常に潜んでいる。
本発明であれば、曲げに対する影響が極力小さくできる
ので、この様な外乱によるノイズの影響を避けることが
できる。The place where the plastic optical fiber cable is laid is not limited to a fixed place, and it may be a portable audio device, an in-vehicle device, or a machine tool such as a robot. For example, bending of the cable due to vibration or movement is inevitable. Normally, a sufficient design is made in anticipation of those fluctuations, but there are always hidden situations where extreme disturbances cause noise, such as when something is caught on a cable.
According to the present invention, since the influence on bending can be minimized, the influence of noise due to such disturbance can be avoided.
【０００９】このように、ケーブルが屈曲や振動しても
光パワーの変動が少く、極端な屈曲にも影響を受けない
特徴は、デイジタル通信の場合にも好ましいことである
が、電気信号をそのまま周波数と光強度で伝送するＮＴ
ＳＣ方式の光データリンクに採用することも可能にする
のである。さて、本発明に用いる多芯プラスチック光フ
ァイバは芯材としてはＰＭＭＡ系の樹脂或はポリカーボ
ネート系の樹脂、或はポリスチレン系の樹脂などであ
り、鞘樹脂はこれらの芯樹脂に対応する通常のプラスチ
ック光ファイバの鞘樹脂として公知のものを使用するこ
とが出来る。As described above, the characteristic that the fluctuation of the optical power is small even if the cable is bent or vibrated, and it is not affected by the extreme bending, which is also preferable in the case of digital communication, but the electric signal is not changed. NT transmitting with frequency and light intensity
It can also be applied to SC optical data links. The multi-core plastic optical fiber used in the present invention is made of PMMA-based resin, polycarbonate-based resin, polystyrene-based resin, or the like as the core material, and the sheath resin is an ordinary plastic corresponding to these core resins. A known resin can be used as the sheath resin of the optical fiber.
【００１０】特に好ましいものとしては、芯樹脂がＰＭ
ＭＡ、鞘樹脂がＶｄＦとＴＦＥの共重合体でＶｄＦ（ビ
ニリデンフロライド）の量が７０モル％〜９１モル％程
度のもの、ＶｄＦとトリフロロエチレンとヘキサフロロ
アセトン共重合体からなるもので、例えば特開昭６４−
６８７０１に記載されているようなものが伝送損失が低
いので好ましい。これらの組み合わせでは、６６０ｎｍ
のＬＥＤ（発光ダイオード）に対し３５０〜７００ｄＢ
／ｋｍのものが、８３０ｎｍのＬＥＤに対し２５００〜
３５００ｄＢ／ｋｍのものが得られる。更に、芯をＰＭ
ＭＡ樹脂とし、鞘にＶｄＦを９１モル％以上含む、樹脂
の融点が１３０℃〜１５５℃であり、且つ、樹脂のショ
アＤ硬度が６０以上の、ＶｄＦを主体とする鞘樹脂を使
用する場合には耐熱ファイバとして、１２０℃以上にも
達する車のエンジンルームでの信号伝送用途にも使用可
能なものとなる。Particularly preferably, the core resin is PM.
MA, the sheath resin is a copolymer of VdF and TFE in which the amount of VdF (vinylidene fluoride) is about 70 mol% to 91 mol%, and VdF, trifluoroethylene, and hexafluoroacetone copolymer. For example, JP-A-64-
The one described in 68701 is preferable because of its low transmission loss. With these combinations, 660 nm
350-700dB for each LED (light emitting diode)
/ Km is 2500 to 830nm LED
A value of 3500 dB / km is obtained. Furthermore, the core is PM
In the case of using a VdF-based sheath resin, which is a MA resin, contains VdF in an amount of 91 mol% or more, has a resin melting point of 130 ° C. to 155 ° C., and has a Shore D hardness of 60 or more. As a heat resistant fiber, it can be used for signal transmission in the engine room of a car reaching 120 ° C or higher.
【００１１】このような、１２０℃程度の高温で使用す
る場合として、さらに、芯樹脂をポリカーボネート、鞘
樹脂をＰＭＭＡとする多芯光ファイバケーブルを使用す
るのが特に好ましい。ＰＭＭＡ樹脂はポリカーボネート
樹脂によく接着するので、特に高湿度の雰囲気でのファ
イバの信頼性に優れているが、単芯ファイバの場合には
高温下では鞘のＰＭＭＡ樹脂が流動して、伝送損失が低
下したり、機械強度が低下する。しかし、多芯化した、
芯がポリカーボネート樹脂／鞘がＰＭＭＡ系樹脂の光フ
ァイバケーブルではその問題が解決されるからである。When using at a high temperature of about 120 ° C., it is particularly preferable to use a multi-core optical fiber cable in which the core resin is polycarbonate and the sheath resin is PMMA. Since the PMMA resin adheres well to the polycarbonate resin, the reliability of the fiber is excellent especially in a high humidity atmosphere. However, in the case of a single-core fiber, the PMMA resin in the sheath flows at high temperature and the transmission loss is increased. Or the mechanical strength decreases. However, multi-core,
This is because an optical fiber cable having a polycarbonate resin core / PMMA resin sheath can solve the problem.
【００１２】本発明は、あくまでも信号伝送が主体であ
るので、イメージファイバとしての解像度などは問わな
いが、多芯光ファイバ断面における、芯の面積と鞘の面
積の比率は芯／鞘＝９／１〜４／６程度が好ましい。鞘
の量を多くするのは、耐熱性の鞘を用いて、ＰＭＭＡ樹
脂の芯を包み込み、耐熱を上げるような時に特に有効で
あるが、伝送光量を多くしたい時には伝送損失値が維持
される範囲で鞘の量は少ないほうが良い。Since the present invention is mainly concerned with signal transmission, the resolution as an image fiber does not matter, but the ratio of the area of the core to the area of the sheath in the cross section of the multicore optical fiber is 9 / core / 9. It is preferably about 1 to 4/6. Increasing the amount of sheath is especially effective when using a heat-resistant sheath to wrap the core of PMMA resin to increase heat resistance, but in the range where the transmission loss value is maintained when increasing the amount of transmitted light. The smaller the amount of pods, the better.
【００１３】多芯光ファイバの外側はポリエチレンやＰ
ＶＣなどの熱可塑性の樹脂で被覆してケーブル化し、端
末のコネクター付けなどは、通常の単芯のプラスチック
光ファイバケーブルと同様に、外被をかしめて固定した
り、接着剤で固定したりすることができるし、多芯光フ
ァイバの裸線そのものの先端を熱板で融着処理すること
や、先端を膨大化させることもできる。接着剤で固定す
ることもできる。The outside of the multi-core optical fiber is polyethylene or P
The cable is coated with a thermoplastic resin such as VC, and the terminal is attached with a connector by caulking the outer cover or fixing it with an adhesive as in the case of a normal single-core plastic optical fiber cable. It is also possible to perform the fusion treatment on the tip of the bare wire of the multi-core optical fiber itself with a hot plate, or to enlarge the tip. It can also be fixed with an adhesive.
【００１４】[0014]
【実施例】次に、実施例によって本発明を詳細に説明す
る。EXAMPLES Next, the present invention will be described in detail with reference to examples.
【００１５】[0015]
【実施例１】芯をＰＭＭＡ樹脂、鞘をビニリデンフロラ
イド８５．５モル％、テトラフロロエチレン１４．５モ
ル％からなる鞘樹脂を用いた多芯プラスチック光ファイ
バで、芯の平均径が２５ミクロン、断面の直径が１．０
ｍｍの多芯光ファイバは、その伝送損失は６６０ｎｍに
発光中心を持つＬＥＤ光に対し、４５０ｄＢ／ｋｍであ
った。Example 1 A multicore plastic optical fiber using a PMMA resin core, a sheath resin composed of 85.5 mol% vinylidene fluoride and 14.5 mol% tetrafluoroethylene as a sheath, and having an average core diameter of 25 microns. , Cross section diameter is 1.0
The transmission loss of the mm multi-core optical fiber was 450 dB / km for the LED light having the emission center at 660 nm.
【００１６】この光ファイバに２．２ｍｍの黒色ポリエ
チレンの被覆を施し、２ｍの長さに切断し、両端を、コ
ネクタに装着し、光源として６６０ｎｍＬＥＤを用い、
受光部には、光パワメータを用い光出力をレコーダーに
繋いだ。比較のために、芯の直径０．９８ｍｍ、鞘の外
径１．００ｍｍの裸線からなるプラスチツク光ファイバ
（単芯）を２．２ｍｍの黒色ポリエチレンで被覆したケ
ーブルを同様にテストした。光ファイバケーブルの中間
点に屈曲点を設け、５００ｇの荷重をかけながら曲げ半
径５ｍｍで屈曲運動を行い、両例の光パワーの変化をみ
た。This optical fiber is coated with 2.2 mm of black polyethylene, cut to a length of 2 m, both ends are attached to a connector, and a 660 nm LED is used as a light source.
An optical power meter was used for the light receiving part, and the optical output was connected to the recorder. For comparison, a cable in which a plastic optical fiber (single core) consisting of a bare wire having a core diameter of 0.98 mm and a sheath outer diameter of 1.00 mm was coated with 2.2 mm of black polyethylene was similarly tested. A bending point was provided at an intermediate point of the optical fiber cable, and bending motion was performed with a bending radius of 5 mm while applying a load of 500 g, and changes in optical power of both examples were observed.
【００１７】曲げ角度は９０度で０度と９０度の間を７
秒で屈曲を繰り返した。その結果、本発明の多芯光ファ
イバの場合には光パワーの変化は図３に示すように０．
１ｄＢの変動しかないのに対し、比較例とした通常のプ
ラスチック光ファイバ（単芯）では図４に示すように
２．４ｄＢの変動となった。The bending angle is 90 degrees, and between 0 and 90 degrees is 7 degrees.
The bending was repeated in seconds. As a result, in the case of the multi-core optical fiber of the present invention, the change in optical power is as shown in FIG.
While the fluctuation is only 1 dB, the fluctuation is 2.4 dB in the ordinary plastic optical fiber (single core) as the comparative example, as shown in FIG.
【００１８】[0018]
【実施例２】実施例１で用いたものと同様の多芯光ファ
イバケーブル２ｍ及び単芯光ファイバケーブルの両例に
ついて、静的にケーブルを曲げた時の光パワーの減少を
しらべた。曲げ角度は３６０度である。実施結果を表１
に示す。この結果からも明らかに、曲げに対する光減衰
量が小さいことが分かる。[Embodiment 2] With respect to both the multi-core optical fiber cable 2m and the single-core optical fiber cable similar to those used in Embodiment 1, reduction in optical power when the cable was statically bent was examined. The bending angle is 360 degrees. Table 1 shows the implementation results
Shown in. From this result, it is clear that the amount of optical attenuation with respect to bending is small.
【００１９】[0019]
【表１】 [Table 1]
【００２０】[0020]
【発明の効果】多芯光ファイバを光通信ケーブルとして
用いることにより、曲げや振動に対して、光量変化の小
さな信号伝送を可能にするケーブルが得られる。By using a multi-core optical fiber as an optical communication cable, a cable that enables signal transmission with a small change in light quantity against bending or vibration can be obtained.
【図１】多芯ファイバケーブルを用いた本発明の光信号
伝送例。FIG. 1 is an example of optical signal transmission of the present invention using a multi-core fiber cable.
【図２】多芯光ファイバケーブルの断面。FIG. 2 is a cross section of a multi-core optical fiber cable.
【図３】実施例１の多芯光ファイバケーブルの屈曲試験
による光パワー変化。FIG. 3 is a change in optical power due to a bending test of the multi-core optical fiber cable of Example 1.
【図４】実施例２の普通のプラスチック光ファイバケー
ブル（単芯）の屈曲試験による光パワー変化。FIG. 4 is a change in optical power by a bending test of an ordinary plastic optical fiber cable (single core) of Example 2.
Claims (1)
々の芯の直径が５０ミクロン以下である少なくとも５０
０個以上の多数の芯繊維が個別に仕切られるように、屈
折率の低い鞘樹脂で充満され、一纏めにされた、断面が
ほぼ円状である多芯プラスチック光ファイバを熱可塑性
樹脂で保護被覆した、光信号伝送用ケーブル。1. A diameter of each core made of a transparent core resin having a high refractive index is 50 microns or less, and at least 50.
A multi-core plastic optical fiber having a substantially circular cross section, which is filled with a sheath resin having a low refractive index and is bundled so that a large number of 0 or more core fibers can be individually partitioned, is coated with a thermoplastic resin. A cable for optical signal transmission.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21057791A JP3299767B2 (en) | 1991-08-22 | 1991-08-22 | An optical signal transmission method using a multi-core plastic optical fiber. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21057791A JP3299767B2 (en) | 1991-08-22 | 1991-08-22 | An optical signal transmission method using a multi-core plastic optical fiber. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0553035A true JPH0553035A (en) | 1993-03-05 |
| JP3299767B2 JP3299767B2 (en) | 2002-07-08 |
Family
ID=16591618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21057791A Expired - Lifetime JP3299767B2 (en) | 1991-08-22 | 1991-08-22 | An optical signal transmission method using a multi-core plastic optical fiber. |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3299767B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6600699B2 (en) | 2000-05-24 | 2003-07-29 | Funai Electric Co., Ltd. | Apparatus for searching of recorded information |
| JP2010266720A (en) * | 2009-05-15 | 2010-11-25 | Asahi Kasei E-Materials Corp | Multi-core plastic coated optical fiber and cable |
-
1991
- 1991-08-22 JP JP21057791A patent/JP3299767B2/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6600699B2 (en) | 2000-05-24 | 2003-07-29 | Funai Electric Co., Ltd. | Apparatus for searching of recorded information |
| JP2010266720A (en) * | 2009-05-15 | 2010-11-25 | Asahi Kasei E-Materials Corp | Multi-core plastic coated optical fiber and cable |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3299767B2 (en) | 2002-07-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US6542674B1 (en) | Fiber optic cables with strength members | |
| EP0530326B1 (en) | Buffered insulated optical waveguide fiber cable | |
| CA1251972A (en) | Fiber optic plenum cable | |
| US6438299B1 (en) | Assembly and method for furcating optical fibers | |
| KR20070098739A (en) | Optical/electrical circuit interconnect board and evaluation method therefor | |
| US20140376866A1 (en) | Optical fiber and optical cable | |
| US11187866B2 (en) | Fiber multitube optical fiber cable | |
| GB2214653A (en) | High Temperature optical cables | |
| US4345112A (en) | High strength cable usable undersea | |
| JPH0553035A (en) | Cable for transmission of light signal by using multiple optical fiber | |
| GB2215480A (en) | Optical fibre cable element | |
| GB2105865A (en) | Optical communication cable having a light wave guide and a tensile secondary coating | |
| JP5095328B2 (en) | Optical transmission module | |
| WO2012170080A1 (en) | Optical assembly and optical cable thereof | |
| JP3773591B2 (en) | Single fiber optic cord | |
| JP7471937B2 (en) | Optical cable installation method and optical cable installation set | |
| WO2021006207A1 (en) | Optical cable laying construction method and optical cable laying construction set | |
| CN217656186U (en) | USB data line | |
| JP3114885B2 (en) | Photoelectric switch using multi-core optical fiber unit | |
| CN220568964U (en) | System for transmission of optical and electrical signals | |
| EP3812817A1 (en) | Optical fibre ribbon cable with low diameter optical fibres | |
| WO1996008742A1 (en) | Large diameter optical signal cable | |
| Foord et al. | Special issue paper. Principles of fibre-optical cable design | |
| JP2004012616A (en) | Coated optical fiber, two-dimensional tape-like coated optical fiber and optical fiber cord | |
| JPH0247613A (en) | Coated optical fibers for optical fiber tape |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A02 | Decision of refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A02 Effective date: 20010313 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20080419 Year of fee payment: 6 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090419 Year of fee payment: 7 |
|
| S531 | Written request for registration of change of domicile |
Free format text: JAPANESE INTERMEDIATE CODE: R313531 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090419 Year of fee payment: 7 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100419 Year of fee payment: 8 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100419 Year of fee payment: 8 |
|
| S111 | Request for change of ownership or part of ownership |
Free format text: JAPANESE INTERMEDIATE CODE: R313111 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100419 Year of fee payment: 8 |
|
| R350 | Written notification of registration of transfer |
Free format text: JAPANESE INTERMEDIATE CODE: R350 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110419 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110419 Year of fee payment: 9 |
|
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120419 Year of fee payment: 10 |
|
| EXPY | Cancellation because of completion of term | ||
| FPAY | Renewal fee payment (event date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120419 Year of fee payment: 10 |