JPH0580226A - Spliced and reinforced part of coated optical fiber - Google Patents
Spliced and reinforced part of coated optical fiberInfo
- Publication number
- JPH0580226A JPH0580226A JP3271996A JP27199691A JPH0580226A JP H0580226 A JPH0580226 A JP H0580226A JP 3271996 A JP3271996 A JP 3271996A JP 27199691 A JP27199691 A JP 27199691A JP H0580226 A JPH0580226 A JP H0580226A
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- spliced
- reinforcing material
- fusion
- diameter
- 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
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Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、接続端部の外皮被覆層
を皮剥ぎして融着接続された裸光ファイバの露出部分を
補強する光ファイバ心線の補強部に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a reinforcing portion of an optical fiber core for stripping an outer cover layer at a connecting end to reinforce an exposed portion of a bare optical fiber fusion-spliced.
【０００２】[0002]
【従来の技術】図５および図６には従来の一般的な光フ
ァイバ心線の融着接続部における補強構造が示されてい
る。光ファイバ心線１，２は裸光ファイバ３の表面にシ
リコン等の極薄のプライマリィ被覆層４を形成し、その
上側にナイロン樹脂等からなる外皮被覆層５を形成して
なり、光ファイバ心線１，２の融着接続を行う場合は、
光ファイバ心線１，２の接続端部のプライマリィ被覆層
４と外皮被覆層５を皮剥ぎによって除去し、露出した裸
光ファイバ３の端面をカットしてから、裸光ファイバ３
同士を突き合わせ、放電エネルギを与えて光ファイバ心
線１，２の裸光ファイバ３同士の融着接続が行われる。2. Description of the Related Art FIGS. 5 and 6 show a conventional reinforcing structure in a fusion splicing portion of an optical fiber core wire. The optical fiber cores 1 and 2 are formed by forming an ultrathin primary coating layer 4 of silicon or the like on the surface of the bare optical fiber 3 and forming an outer coating layer 5 of nylon resin or the like on the upper side thereof. When performing fusion splicing of the core wires 1 and 2,
The primary coating layer 4 and the outer coating layer 5 at the connection ends of the optical fiber core wires 1 and 2 are removed by peeling, and the exposed end surface of the bare optical fiber 3 is cut, and then the bare optical fiber 3
The bare optical fibers 3 of the optical fiber cores 1 and 2 are fusion-spliced by abutting each other and applying discharge energy.
【０００３】そして融着接続部は補強材６によって補強
される。この補強の方式として、図５に示すものは、露
出されている裸光ファイバ３の全区間および光ファイバ
心線１，２の外皮被覆層５にかけての領域を該外皮被覆
層５とほぼヤング率が等しい例えばナイロン樹脂等の補
強材６を塗布することによって行っている。The fusion spliced portion is reinforced by a reinforcing material 6. As a method of this reinforcement, the method shown in FIG. 5 is such that the exposed whole area of the bare optical fiber 3 and the region of the optical fiber core wires 1 and 2 extending to the outer cover layer 5 and the outer cover layer 5 are substantially Young's modulus. Are applied by applying a reinforcing material 6 such as nylon resin.
【０００４】また、図６に示すものは、融着接続されて
いる裸光ファイバ３の全露出区間にかけて同様にナイロ
ン等の樹脂を補強材６として外皮被覆層５の外径とほぼ
同一の径に被覆している。Further, in the structure shown in FIG. 6, a resin such as nylon is likewise used as a reinforcing material 6 over the entire exposed section of the naked optical fiber 3 which is fusion-bonded, and the outer diameter of the outer covering layer 5 is substantially the same. Is covered.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、前記図
６に示す補強部は補強材６の外径が外皮被覆層５の外径
よりも大きくなるために、これら融着接続された光ファ
イバ心線を撚り合わせてケーブル化するとき等に、補強
材６の突出部分が邪魔になり、光ファイバ心線を取り扱
う上で問題があった。However, in the reinforcing portion shown in FIG. 6, since the outer diameter of the reinforcing material 6 is larger than the outer diameter of the outer covering layer 5, these fusion spliced optical fiber core wires are used. When the fibers are twisted together to form a cable, the protruding portion of the reinforcing member 6 becomes an obstacle, and there is a problem in handling the optical fiber core wire.
【０００６】また、図５に示す接続補強部は補強材６の
外径を外皮被覆層５の外径とほぼ等しくしているため、
光ファイバ心線を取り扱う上で支障を生じることはない
が、補強材６と外皮被覆層５は外皮被覆層５の端面部分
の非常に小さい面積で接着しているだけなので、その接
着力が弱く、光ファイバ心線を取り扱うときに引っ張り
力が加わったり曲げが加わると、外皮被覆層５と補強材
６との境界部分に破断が生じるという問題があった。Further, in the connection reinforcing portion shown in FIG. 5, since the outer diameter of the reinforcing material 6 is made substantially equal to the outer diameter of the outer cover layer 5,
Although this does not hinder the handling of the optical fiber core wire, since the reinforcing material 6 and the outer cover layer 5 are bonded to each other only in a very small area of the end face portion of the outer cover layer 5, the adhesive force is weak. However, when a tensile force or bending is applied when handling the optical fiber core wire, there is a problem that the boundary portion between the outer cover layer 5 and the reinforcing material 6 is broken.
【０００７】本発明は上記従来の課題を解決するために
なされたものであり、その目的は、光ファイバ心線の融
着接続部を補強する補強材が外皮被覆層よりも大径化し
て取り扱い上邪魔になるということがなく、しかも、補
強材と外皮被覆層を十分な接着力を保って結合すること
ができる光ファイバ心線の接続補強部を提供することに
ある。The present invention has been made in order to solve the above-mentioned conventional problems, and an object thereof is to handle a reinforcing material for reinforcing a fusion spliced portion of an optical fiber core with a diameter larger than that of an outer covering layer. It is an object of the present invention to provide a connection reinforcing portion for an optical fiber core wire that does not obstruct the upper part and can bond the reinforcing material and the outer covering layer with a sufficient adhesive force.
【０００８】[0008]
【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、次のように構成されている。すなわち、本
発明の接続補強部は、接続端部が皮剥ぎされて融着接続
されている裸光ファイバ部分の両隣りで、光ファイバ心
線の外皮被覆層の一部が任意の区間長にわたり除去され
て小径部が形成され、前記融着接続されている裸光ファ
イバの全露出区間とこれに連接する外皮被覆層の小径部
にかけて補強材が外皮被覆層とほぼ同一径に盛られて再
被覆されていることを特徴として構成されている。In order to achieve the above object, the present invention is configured as follows. That is, the connection reinforcing portion of the present invention is on both sides of the bare optical fiber portion where the connection end portion is peeled off and fusion-spliced, and a part of the outer coating layer of the optical fiber core wire extends over an arbitrary section length. A small-diameter portion is formed by removal, and the reinforcing material is laid over the small-diameter portion of the outer covering layer connected to the entire exposed section of the fusion-spliced naked optical fiber and the outer covering layer to have the same diameter as that of the outer covering layer. It is characterized by being covered.
【０００９】[0009]
【作用】上記構成の本発明において、融着接続された裸
光ファイバの全露出区間とこれに連接する外皮被覆層の
小径部にかけて補強材を外皮被覆層とほぼ同一径に盛っ
て再被覆すると、補強材は外皮被覆層の端面と小径部に
かけての広い面積にわたって接触し、補強材と外皮被覆
層との接着強度が十分に高められる。In the present invention having the above-mentioned structure, when the reinforcing material is recoated on the entire exposed section of the fusion-spliced naked optical fiber and the small diameter portion of the outer covering layer connected to the exposed portion, the reinforcing material is recoated so as to have substantially the same diameter as the outer covering layer. The reinforcing material comes into contact with the end surface of the outer covering layer over a wide area extending to the small diameter portion, and the adhesive strength between the reinforcing material and the outer covering layer is sufficiently increased.
【００１０】[0010]
【実施例】以下、本発明の実施例を図面に基づいて説明
する。なお、本実施例の説明において、従来例と同一の
部分には同一符号を付し、その詳細な重複説明は省略す
る。図１には本発明に係る光ファイバ心線の接続補強部
の一実施例の構成が示されている。Embodiments of the present invention will be described below with reference to the drawings. In the description of the present embodiment, the same parts as those of the conventional example are designated by the same reference numerals, and detailed description thereof will be omitted. FIG. 1 shows the configuration of an embodiment of a connection reinforcing portion of an optical fiber core wire according to the present invention.
【００１１】本実施例が従来例と異なる特徴的なこと
は、光ファイバ心線の融着接続に際し、接続端部の皮剥
ぎによって露出した裸光ファイバ３の根元部から所定の
長さ区間Ｌにかけて外皮被覆層５の一部を除去して小径
部７を形成し、裸光ファイバ３の融着接続後に、この裸
光ファイバ３の全露出区間と小径部７にかけて補強材６
を外皮被覆層５の外径とほぼ同一径に盛って裸光ファイ
バ３を再被覆し、融着接続部を補強するように構成した
ことである。The feature of this embodiment different from the conventional example is that a predetermined length section L is provided from the root of the bare optical fiber 3 exposed by peeling the connection end during fusion splicing of optical fiber cores. The small diameter portion 7 is formed by removing a part of the outer covering layer 5 over the entire length, and after the splicing of the bare optical fiber 3 is completed, the reinforcing material 6 is provided over the entire exposed section of the bare optical fiber 3 and the small diameter portion 7.
Is formed to have a diameter substantially equal to the outer diameter of the outer coating layer 5 to re-coat the bare optical fiber 3 and reinforce the fusion spliced portion.
【００１２】このように、小径部７を形成することによ
り、補強材６を再被覆するときに、補強材６と外皮被覆
層５との接触面積が大きくなり、これにより、補強材６
と外皮被覆層５との接着強度が十分に高められ、光ファ
イバ心線を取り扱うときに、引っ張り力や曲げ力が加わ
っても補強材６と外皮被覆層５との境界部で破断が生じ
るということがなくなる。By forming the small-diameter portion 7 in this manner, the contact area between the reinforcing material 6 and the outer covering layer 5 is increased when the reinforcing material 6 is recoated, and thus the reinforcing material 6 is formed.
It is said that the adhesive strength between the outer cover layer 5 and the outer cover layer 5 is sufficiently enhanced, and when the optical fiber core wire is handled, even if tensile force or bending force is applied, breakage occurs at the boundary portion between the reinforcing material 6 and the outer cover layer 5. Will disappear.
【００１３】しかも、補強材６の外径を外皮被覆層５の
外径とほぼ同一径とすることで、融着接続された光ファ
イバ心線を例えばケーブル化する際に、この接続補強部
が突き出して邪魔になるということがなく、光ファイバ
心線の取り扱いを円滑に行うことが可能となる。Moreover, by making the outer diameter of the reinforcing material 6 substantially the same as the outer diameter of the outer cover layer 5, this connection reinforcing portion is formed when the fusion spliced optical fiber core wire is formed into a cable, for example. It is possible to handle the optical fiber core wire smoothly without sticking out and becoming an obstacle.
【００１４】図３は本実施例の接続補強部と図５に示す
従来の接続補強部との接続強度の試験結果をワイブル分
布上に表して比較したものである。この試験では、本実
施例と従来例の試料はいずれも裸光ファイバ３を外径12
5 μｍのガラスファイバとし、外皮被覆層５の外径を25
0 μｍとしている。そして、本実施例の補強接続部では
小径部７を外皮被覆層５の上下両側からその一部を斜め
に切り込みを入れて除去して図２の（ａ）に示すような
楔状の小径部７とし、その小径部７の長さ区間Ｌを２mm
にしている。これら本実施例の接続補強部を有する光フ
ァイバ心線と従来例の接続補強部を有する光ファイバ心
線とをそれぞれ25本のサンプルについて引っ張り試験機
にかけ、引っ張り強度を測定した。そして、各データを
順番に並べ、その累積破断確率（ｆ）を算出し、横軸に
破断強度の対数を、縦軸に（１−ｆ）の２回対数をとっ
て示したものであり、従来例のサンプルによる中央値は
1.66Kgｆであり、本実施例のサンプルによる中央値は2.
95Kgｆであった。FIG. 3 is a comparison of the test results of the connection strength between the connection reinforcing portion of this embodiment and the conventional connection reinforcing portion shown in FIG. 5 on the Weibull distribution. In this test, the sample of the present example and the sample of the conventional example have the outer diameter of the bare optical fiber 3 of 12
The outer diameter of the outer covering layer 5 is 25
It is set to 0 μm. Then, in the reinforcing connection portion of the present embodiment, the small-diameter portion 7 is removed from the upper and lower sides of the outer covering layer 5 by obliquely cutting a part thereof, and the small-diameter portion 7 having a wedge shape as shown in FIG. And the length section L of the small diameter portion 7 is 2 mm.
I have to. Twenty-five samples of each of the optical fiber core wire having the connection reinforcement portion of the present example and the optical fiber core wire having the connection reinforcement portion of the conventional example were subjected to a tensile tester to measure the tensile strength. Then, the respective data are arranged in order, the cumulative fracture probability (f) is calculated, the horizontal axis represents the logarithm of the fracture strength, and the vertical axis represents the double logarithm of (1-f). The median value of the sample of the conventional example is
It is 1.66 Kgf, and the median value by the sample of this example is 2.
It was 95 kgf.
【００１５】この試験結果によれば、本実施例のものは
従来例に比べ約１Kgｆの強度改善が認められ、良好な接
続補強効果が得られることを実証できた。According to the results of this test, the strength of this example was improved by about 1 Kgf as compared with the conventional example, and it was proved that a good connection reinforcing effect was obtained.
【００１６】さらに、図４に示すように、外皮被覆層５
の最外層にほぼ５〜10μｍの厚みの着色層８を設けた光
ファイバ心線の接続補強部についても同様な引っ張り試
験を行ってみた。この試験に際しては、前記試験の場合
と同様に外皮被覆層５に楔状の小径部７を形成した後、
さらにこの小径部７に連接して長さ５mmにわたって着色
層部分を除去して段部10を形成し、裸光ファイバ３の融
着接続後、その裸光ファイバ３の全露出区間と小径部７
と段部10にかけて補強材６を着色層８の外径とほぼ同一
径になるように再被覆してサンプルを作成し、このサン
プルを引っ張り試験機にかけてその強度を測定したとこ
ろ、前記図３に示す試験結果と同様な引っ張り強度の改
善が認められた。Further, as shown in FIG. 4, the outer cover layer 5
The same tensile test was performed on the connection reinforcing portion of the optical fiber core wire in which the coloring layer 8 having a thickness of about 5 to 10 μm was provided on the outermost layer. In this test, as in the case of the above test, after forming the wedge-shaped small diameter portion 7 in the outer cover layer 5,
Further, the colored layer portion is removed over a length of 5 mm so as to be connected to the small diameter portion 7 to form a step portion 10. After the fusion splicing of the bare optical fiber 3, the entire exposed section of the bare optical fiber 3 and the small diameter portion 7 are formed.
The reinforcing material 6 is recoated so as to have a diameter substantially equal to the outer diameter of the colored layer 8 over the step 10 and a sample is prepared, and the strength of the sample is measured by a tensile tester. An improvement in tensile strength similar to the test results shown was observed.
【００１７】なお、本発明は上記実施例に限定されるこ
とはなく、様々な実施の態様を採り得る。例えば、外皮
被覆層５に形成する小径部７の形状は特定の形状に限定
されることはなく様々な形態を採り得るもので、例え
ば、図２の（ｂ）に示すように外皮被覆層５の両側から
小径部７の両端面が平行となるように切り込みを入れて
外皮被覆層５の一部を除去した形状にしたり、同図の
（ｃ）に示すように、外皮被覆層５の全周にわたり切り
込みを入れて小径部７を円筒（または角筒）状にした
り、あるいは同図の（ｄ）に示すように小径部７を錐状
（円錐や角錐状）に形成する等、様々な形状に形成する
ことができる。The present invention is not limited to the above-mentioned embodiment, and various embodiments can be adopted. For example, the shape of the small-diameter portion 7 formed in the outer cover layer 5 is not limited to a particular shape and may take various forms. For example, as shown in FIG. The outer diameter of the small-diameter portion 7 is cut in such a manner that both end surfaces of the small-diameter portion 7 are parallel to each other, and a part of the outer covering layer 5 is removed, or as shown in FIG. There are various methods such as making a cut along the circumference to make the small diameter portion 7 into a cylindrical (or square tube) shape, or forming the small diameter portion 7 into a cone shape (cone or pyramid shape) as shown in FIG. It can be formed into a shape.
【００１８】また、補強材６の材料もナイロン以外の様
々な樹脂を用いることができるものである。さらに小径
部７の長さＬは本実施例の２mmに限定されず、仕様に応
じ任意の長さにすることができる。Further, as the material of the reinforcing material 6, various resins other than nylon can be used. Furthermore, the length L of the small diameter portion 7 is not limited to 2 mm in this embodiment, and can be any length according to the specifications.
【００１９】[0019]
【発明の効果】本発明は、皮剥ぎして露出した裸光ファ
イバに連接する外皮被覆層に小径部を設け、融着接続し
た裸光ファイバの全露出区間とこれに連接する外皮被覆
層の小径部にかけて補強材が再被覆されるので、補強材
と外皮被覆層との接触面積を大きくすることができ、こ
れにより光ファイバ心線に引っ張り力や曲げ力が加わっ
ても補強材と外皮被覆層との境界部から破断するという
ことがなくなり、融着接続部の接続強度を十分に高める
ことが可能となる。According to the present invention, a small-diameter portion is provided in the outer coating layer that is connected to the bare optical fiber that is exposed by peeling, and the entire exposed section of the fusion-spliced bare optical fiber and the outer coating layer that is connected to this are exposed. Since the reinforcing material is recoated over the small-diameter portion, the contact area between the reinforcing material and the outer coating layer can be increased, which allows the reinforcing material and outer coating to be covered even if tensile or bending force is applied to the optical fiber core wire. It does not break from the boundary portion with the layer, and it becomes possible to sufficiently enhance the connection strength of the fusion splicing portion.
【００２０】また、補強材は外皮被覆層とほぼ同一径に
再被覆されているので、融着接続された光ファイバ心線
を取り扱うとき、接続補強部が外皮被覆層よりも大径化
して突出することがないので、この接続補強部が邪魔に
なるということがなく、光ファイバ心線をケーブル化す
るとき等、光ファイバ心線の取り扱いに支障をきたすと
いうことがなくなる。Further, since the reinforcing material is re-coated so as to have substantially the same diameter as that of the outer cover layer, when the fusion spliced optical fiber core wire is handled, the connecting reinforcing portion has a larger diameter than the outer cover layer and protrudes. Since this does not occur, the connection reinforcing portion does not become an obstacle and does not hinder the handling of the optical fiber core wire when the optical fiber core wire is formed into a cable.
【図１】本発明に係る光ファイバ心線の接続補強部の一
実施例を示す構成図である。FIG. 1 is a configuration diagram showing an embodiment of a connection reinforcing portion of an optical fiber core wire according to the present invention.
【図２】本発明に係る接続補強部において、外皮被覆層
に形成する小径部の各種形態例を示す説明図である。FIG. 2 is an explanatory view showing various forms of small diameter portions formed in the outer cover layer in the connection reinforcing portion according to the present invention.
【図３】本実施例における光ファイバ心線の接続補強部
の接続強度の試験例を従来例との比較で示すワイブル分
布図である。FIG. 3 is a Weibull distribution diagram showing a test example of the connection strength of the connection reinforcing portion of the optical fiber core wire in the present embodiment in comparison with the conventional example.
【図４】本発明に係る光ファイバ心線の接続補強部の他
の例を示す説明図である。FIG. 4 is an explanatory view showing another example of the connection reinforcing portion of the optical fiber core wire according to the present invention.
【図５】従来の光ファイバ心線の接続補強部の説明図で
ある。FIG. 5 is an explanatory diagram of a conventional connection reinforcing portion of an optical fiber core wire.
【図６】従来の光ファイバ心線の他の接続補強部の説明
図である。FIG. 6 is an explanatory diagram of another conventional connection reinforcing portion of the optical fiber core wire.
１，２ 光ファイバ心線 ３ 裸光ファイバ ５ 外皮被覆層 ６ 補強材 ７ 小径部 1, 2 optical fiber core wire 3 bare optical fiber 5 outer cover layer 6 reinforcing material 7 small diameter part
Claims (1)
いる裸光ファイバ部分の両隣りで、光ファイバ心線の外
皮被覆層の一部が任意の区間長にわたり除去されて小径
部が形成され、前記融着接続されている裸光ファイバの
全露出区間とこれに連接する外皮被覆層の小径部にかけ
て補強材が外皮被覆層とほぼ同一径に盛られて再被覆さ
れている光ファイバ心線の接続補強部。1. A small-diameter portion in which a part of the outer coating layer of the optical fiber core is removed over an arbitrary section length on both sides of a bare optical fiber portion where the connection end portion is stripped and fusion-spliced. Is formed, and the reinforcing material is re-coated by covering the entire exposed section of the fusion-spliced bare optical fiber and the small diameter portion of the outer covering layer connected to the exposed section so that the reinforcing material has the same diameter as the outer covering layer. Connection reinforcement part of the fiber core wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3271996A JPH0580226A (en) | 1991-09-24 | 1991-09-24 | Spliced and reinforced part of coated optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3271996A JPH0580226A (en) | 1991-09-24 | 1991-09-24 | Spliced and reinforced part of coated optical fiber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0580226A true JPH0580226A (en) | 1993-04-02 |
Family
ID=17507700
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3271996A Pending JPH0580226A (en) | 1991-09-24 | 1991-09-24 | Spliced and reinforced part of coated optical fiber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0580226A (en) |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019146713A1 (en) | 2018-01-25 | 2019-08-01 | 住友電気工業株式会社 | Method for manufacturing optical fiber, and optical fiber |
| WO2019163901A1 (en) | 2018-02-22 | 2019-08-29 | 住友電気工業株式会社 | Method for producing optical fiber, and optical fiber |
| CN114442225A (en) * | 2022-02-16 | 2022-05-06 | 高意通讯（深圳）有限公司 | Cold fiber stripping method and device for optical fiber |
-
1991
- 1991-09-24 JP JP3271996A patent/JPH0580226A/en active Pending
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|---|---|---|---|---|
| WO2019146713A1 (en) | 2018-01-25 | 2019-08-01 | 住友電気工業株式会社 | Method for manufacturing optical fiber, and optical fiber |
| CN111656236A (en) * | 2018-01-25 | 2020-09-11 | 住友电气工业株式会社 | Method for manufacturing optical fiber and optical fiber |
| US11454760B2 (en) | 2018-01-25 | 2022-09-27 | Sumitomo Electric Industries, Ltd. | Method for manufacturing optical fiber and optical fiber |
| WO2019163901A1 (en) | 2018-02-22 | 2019-08-29 | 住友電気工業株式会社 | Method for producing optical fiber, and optical fiber |
| CN111758056A (en) * | 2018-02-22 | 2020-10-09 | 住友电气工业株式会社 | Method for manufacturing optical fiber and optical fiber |
| JPWO2019163901A1 (en) * | 2018-02-22 | 2021-02-25 | 住友電気工業株式会社 | Optical fiber manufacturing method and optical fiber |
| US20210096299A1 (en) * | 2018-02-22 | 2021-04-01 | Sumitomo Electric Industries, Ltd. | Method for producing optical fiber, and optical fiber |
| CN111758056B (en) * | 2018-02-22 | 2023-08-29 | 住友电气工业株式会社 | Optical fiber manufacturing method and optical fiber |
| CN114442225A (en) * | 2022-02-16 | 2022-05-06 | 高意通讯（深圳）有限公司 | Cold fiber stripping method and device for optical fiber |
| CN114442225B (en) * | 2022-02-16 | 2024-01-02 | 高意通讯（深圳）有限公司 | Cold stripping method and device for optical fibers |
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