JPH02311337A - Production of optical fiber incorporated in metallic tube - Google Patents
Production of optical fiber incorporated in metallic tubeInfo
- Publication number
- JPH02311337A JPH02311337A JP1134241A JP13424189A JPH02311337A JP H02311337 A JPH02311337 A JP H02311337A JP 1134241 A JP1134241 A JP 1134241A JP 13424189 A JP13424189 A JP 13424189A JP H02311337 A JPH02311337 A JP H02311337A
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- stainless steel
- tube
- steel tube
- fiber core
- 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 43
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- 238000007664 blowing Methods 0.000 claims abstract description 6
- 239000011261 inert gas Substances 0.000 claims abstract description 5
- 239000007789 gas Substances 0.000 claims abstract description 3
- 239000002184 metal Substances 0.000 claims description 29
- 239000001257 hydrogen Substances 0.000 claims description 13
- 229910052739 hydrogen Inorganic materials 0.000 claims description 13
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 12
- 229910001220 stainless steel Inorganic materials 0.000 abstract description 23
- 239000010935 stainless steel Substances 0.000 abstract description 23
- 230000006866 deterioration Effects 0.000 abstract description 10
- 230000005540 biological transmission Effects 0.000 abstract description 9
- 238000000137 annealing Methods 0.000 abstract description 3
- 238000004904 shortening Methods 0.000 abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 2
- 239000011521 glass Substances 0.000 abstract 1
- 230000037431 insertion Effects 0.000 abstract 1
- 238000003780 insertion Methods 0.000 abstract 1
- 239000002699 waste material Substances 0.000 abstract 1
- 239000000428 dust Substances 0.000 description 5
- 239000011248 coating agent Substances 0.000 description 4
- 238000000576 coating method Methods 0.000 description 4
- 239000010453 quartz Substances 0.000 description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 4
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 3
- 238000005253 cladding Methods 0.000 description 3
- 230000000052 comparative effect Effects 0.000 description 3
- 229910001873 dinitrogen Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 229920000742 Cotton Polymers 0.000 description 1
- 229910003481 amorphous carbon Inorganic materials 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- -1 moisture Substances 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 229920006395 saturated elastomer Polymers 0.000 description 1
- 238000005482 strain hardening Methods 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C25/00—Surface treatment of fibres or filaments made from glass, minerals or slags
- C03C25/10—Coating
- C03C25/104—Coating to obtain optical fibres
- C03C25/106—Single coatings
- C03C25/1061—Inorganic coatings
- C03C25/1063—Metals
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Inorganic Chemistry (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
- Surface Treatment Of Glass Fibres Or Filaments (AREA)
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は金属管付光ファイバの製造方法に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a method of manufacturing an optical fiber with a metal tube.
金属管付光ファイバは、例えばステンレス管等の金属管
内に光フアイバ芯線を挿通させて成るもので、前記光フ
アイバ芯線は該金属管により外力から保護されている。An optical fiber with a metal tube is formed by inserting an optical fiber core wire into a metal tube such as a stainless steel tube, and the optical fiber core wire is protected from external forces by the metal tube.
ところで前記ステンレス管の場合、ステンレステープを
管状に成形し、その合せ目を溶接して作るのが一般的で
あるが、これを更に引落して細径化する場合がある。前
記ステンレス管はこの細径化の過程で加工硬化を起こす
ので、通常水素雰囲気中で焼鈍される。By the way, in the case of the stainless steel pipe, it is common to form a stainless steel tape into a tubular shape and weld the joints, but there are cases where the pipe is further drawn down to make the diameter smaller. Since the stainless steel tube undergoes work hardening during this diameter reduction process, it is usually annealed in a hydrogen atmosphere.
しかしながら、上記のように水素雰囲気中で焼鈍された
ステンレス管にそのまま光フアイバ芯線を挿通させたと
ころ経時的に該光フアイバ芯線の伝送損失が増加する傾
向が見られた。この原因を究明したところ、以下のこと
がわかった。However, when an optical fiber core wire was directly inserted into a stainless steel tube annealed in a hydrogen atmosphere as described above, there was a tendency for the transmission loss of the optical fiber core wire to increase over time. When we investigated the cause of this, we found the following.
即ち、前述した水素雰囲気による焼鈍により、ステンレ
ス管内に水素が残存する。この水素が完全になくならな
いうちに前記ステンレス管内に光フアイバ芯線を挿通さ
せた時、前記水素が徐々に前記光フアイバ芯綿内に浸透
して該光フアイバ芯線の伝送特性を劣化させるというこ
とがわかった。That is, due to the annealing in the hydrogen atmosphere described above, hydrogen remains inside the stainless steel tube. It has been found that when an optical fiber core wire is inserted into the stainless steel tube before this hydrogen is completely eliminated, the hydrogen gradually penetrates into the optical fiber core cotton and deteriorates the transmission characteristics of the optical fiber core wire. Ta.
そのほかステンレス管内に水分が残存している場合には
、その水分が光フアイバ芯綿内に浸透して該光フアイバ
芯線のクラッド表面に付着し、強度劣化、寿命劣化の原
因となっていた。またステンレス管内にゴミが残存して
いる場合には、ゴミづまりにより該ステンレス管内へ光
フアイバ芯線を挿通させることが困難であった。In addition, if moisture remains in the stainless steel tube, the moisture penetrates into the optical fiber core and adheres to the cladding surface of the optical fiber core, causing strength deterioration and lifespan deterioration. In addition, when dust remains inside the stainless steel tube, it is difficult to insert the optical fiber core wire into the stainless steel tube due to the dust clogging.
本発明の目的は、前述した経時的な伝送損失の増加や強
度劣化、寿命劣化のない金属管付光ファイバの製造方法
を提供することにある。An object of the present invention is to provide a method of manufacturing an optical fiber with a metal tube that does not cause the above-mentioned increase in transmission loss over time, deterioration in strength, and deterioration in life.
本発明は上記の課題を解決するためになされたもので、
水素雰囲気または水蒸気雰囲気中で焼鈍して成る金属管
内に乾燥空気または不活性ガスを吹き流すことにより、
前記金属管内に残存している気体を排除し、しかる後、
前記金属管内に光ファイバを挿通させることを特徴とす
るものである。The present invention was made to solve the above problems,
By blowing dry air or inert gas through a metal tube annealed in a hydrogen or steam atmosphere,
After removing the gas remaining in the metal tube,
It is characterized in that an optical fiber is inserted into the metal tube.
金属管内に乾燥空気または不活性ガスを吹き流すことに
より、前記金属管内に残存しているゴミ、水分及び水素
を除去することができる。従って後に前記金属管内に光
ファイバを挿通させた時、水素による光ファイバの伝送
特性の劣化及び水分による光ファイバの強度劣化、寿命
劣化の問題が解決される。またゴミづまりがなくなった
ため金属管内へ光ファイバを容易に挿通させることがで
きる。Dust, moisture, and hydrogen remaining in the metal tube can be removed by blowing dry air or inert gas into the metal tube. Therefore, when an optical fiber is later inserted into the metal tube, the problems of deterioration of the transmission characteristics of the optical fiber due to hydrogen and deterioration of the strength and life of the optical fiber due to moisture are solved. Furthermore, since there is no dust clogging, the optical fiber can be easily inserted into the metal tube.
以下、本発明の実施例を比較例と共に説明する。 Examples of the present invention will be described below along with comparative examples.
ステンレステープを管状に成形し、その合ゼ目を溶接し
て外径４．０ｍｍ、内径３．４ｍｍのステンレス管を作
製する。このステンレス管をダイスを用いて引落して外
径１．２ ｍ ｍ、内径０．８ ｍ ｍ、長さ１０００
ｍｍのステンレス管を作製した。A stainless steel tape is formed into a tubular shape, and the seams are welded to produce a stainless steel tube with an outer diameter of 4.0 mm and an inner diameter of 3.4 mm. This stainless steel tube was drawn down using a die to obtain an outer diameter of 1.2 mm, an inner diameter of 0.8 mm, and a length of 1000 mm.
A stainless steel tube with a diameter of 1 mm was produced.
なお、引落し完了後、前記ステンレス管を１１００°Ｃ
の水素雰囲気中で２〜３分の焼鈍を行なった。上記のよ
うにして作製した外径１．２ ｍ ｍ、内径０．８ｍｍ
、長さ１０００ｍのステンレス管内に、第１図に示すよ
うな、直径５０μｍの石英系コア１、外径１２５μｍの
石英系クラッド２、外径２５０μｍの紫外線硬化性樹脂
被覆３から成る光フアイバ芯線４を挿通させて金属管付
光ファイバを作製した。この金属管付光ファイバの１．
２４μｍ波長での伝送損失の経時的変化を測定したとこ
ろ約２週間で飽和して７ｄＢ／ｋｍの損失増が認められ
た。これを比較例とする。In addition, after the withdrawal is completed, the stainless steel pipe is heated to 1100°C.
Annealing was performed for 2 to 3 minutes in a hydrogen atmosphere. Outer diameter 1.2 mm, inner diameter 0.8 mm produced as above
An optical fiber core 4 consisting of a quartz core 1 with a diameter of 50 μm, a quartz cladding 2 with an outer diameter of 125 μm, and an ultraviolet curable resin coating 3 with an outer diameter of 250 μm, as shown in FIG. An optical fiber with a metal tube was prepared by inserting the metal tube. 1. of this optical fiber with metal tube.
When the temporal change in transmission loss at a wavelength of 24 μm was measured, it was saturated in about two weeks and an increase in loss of 7 dB/km was observed. This is taken as a comparative example.
次に、前記外径１．２ｍｍ、内径０．８ｍｍ、長さ１０
００ｍのステンレス管内に、１５０気圧の窒素ガスが充
填された容積４１１の窒素ガスボンベから吐出圧８０ｋ
ｇ／ｃｍ２の窒素ガスを５分間吹き流した後に、前記光
フアイバ芯線４を挿通させて金属管付光ファイバを作製
した。Next, the outer diameter is 1.2 mm, the inner diameter is 0.8 mm, and the length is 10 mm.
A discharge pressure of 80k is discharged from a nitrogen gas cylinder with a capacity of 411 filled with nitrogen gas of 150 atm into a 00m stainless steel pipe.
After blowing nitrogen gas at g/cm2 for 5 minutes, the optical fiber core wire 4 was inserted to produce an optical fiber with a metal tube.
このように、本発明の方法により作製した金属管付光フ
ァイバについて前記比較例と同様に１．２４μｍ波長で
の伝送損失を測定したところ損失増は認められなかった
。As described above, when the transmission loss at a wavelength of 1.24 μm was measured for the optical fiber with a metal tube produced by the method of the present invention in the same manner as in the comparative example, no increase in loss was observed.
以上説明したように本発明の金属管付光ファイバの製造
方法は光ファイバを金属管内に挿通させる前に乾燥空気
または不活性力：スを吹き流す方法であるため前記金属
管内に残存するゴミ、水分及び水素を排除することがで
きる。従って金属管付光ファイバの経時的な伝送特性の
劣化及び水分による光ファイバの強度劣化、寿命劣化の
問題が解消された。また金属管付光ファイバを製造する
ために金属管内に光ファイバを挿通させる時点でのゴミ
づまりによる作業性の悪さが解消された。As explained above, the method for manufacturing an optical fiber with a metal tube of the present invention involves blowing away dry air or inert gas before inserting the optical fiber into the metal tube. Moisture and hydrogen can be excluded. Therefore, the problems of deterioration of the transmission characteristics of the optical fiber with a metal tube over time, deterioration of the strength and life of the optical fiber due to moisture are solved. In addition, the problem of poor workability due to dust clogging at the time of inserting an optical fiber into a metal tube in order to manufacture an optical fiber with a metal tube has been eliminated.
また前記金属管内に挿通させる光フアイバ芯線として金
属被覆あるいはアモルファスカーボンから成るいわゆる
ハーメチック被覆を施した光フアイバ芯線を用いると、
これら光フアイバ芯線は耐水素性や疲労特性に優れてい
るため金属管付光ファイバの長期信頼性を向上せしめる
上でｈｊましい。Furthermore, if an optical fiber core wire with a metal coating or a so-called hermetic coating made of amorphous carbon is used as the optical fiber core wire to be inserted into the metal tube,
These optical fiber core wires are excellent in hydrogen resistance and fatigue characteristics, and are therefore advantageous in improving the long-term reliability of optical fibers with metal tubes.
【図面の簡単な説明】
第１図は本発明に使用する光フブイバの１例を示す断面
図である。
１〜石英系コア、 ２〜石英系クラッド、 ３〜紫外線
硬化性樹脂被覆、 ４〜光フアイバ芯線。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a sectional view showing an example of an optical fiber used in the present invention. 1 - quartz-based core, 2 - quartz-based cladding, 3 - ultraviolet curable resin coating, 4 - optical fiber core wire.
Claims (1)
内に乾燥空気または不活性ガスを吹き流すことにより、
前記金属管内に残存している気体を排除し、しかる後、
前記金属管内に光ファイバを挿通させることを特徴とす
る金属管付光ファイバの製造方法。By blowing dry air or inert gas through a metal tube annealed in a hydrogen or steam atmosphere,
After removing the gas remaining in the metal tube,
A method of manufacturing an optical fiber with a metal tube, which comprises inserting an optical fiber into the metal tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1134241A JPH02311337A (en) | 1989-05-27 | 1989-05-27 | Production of optical fiber incorporated in metallic tube |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1134241A JPH02311337A (en) | 1989-05-27 | 1989-05-27 | Production of optical fiber incorporated in metallic tube |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02311337A true JPH02311337A (en) | 1990-12-26 |
Family
ID=15123707
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1134241A Pending JPH02311337A (en) | 1989-05-27 | 1989-05-27 | Production of optical fiber incorporated in metallic tube |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02311337A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7836959B2 (en) * | 2006-03-30 | 2010-11-23 | Schlumberger Technology Corporation | Providing a sensor array |
| CN106892557A (en) * | 2017-02-07 | 2017-06-27 | 通鼎互联信息股份有限公司 | The manufacture method and manufacturing equipment of a kind of low loss fiber |
-
1989
- 1989-05-27 JP JP1134241A patent/JPH02311337A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7836959B2 (en) * | 2006-03-30 | 2010-11-23 | Schlumberger Technology Corporation | Providing a sensor array |
| CN106892557A (en) * | 2017-02-07 | 2017-06-27 | 通鼎互联信息股份有限公司 | The manufacture method and manufacturing equipment of a kind of low loss fiber |
| CN106892557B (en) * | 2017-02-07 | 2019-09-13 | 通鼎互联信息股份有限公司 | A kind of manufacturing method and manufacturing equipment of low loss fiber |
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