JP2003222734A - Airtight sealing structure of optical fiber, and optical fiber array using the same - Google Patents
Airtight sealing structure of optical fiber, and optical fiber array using the sameInfo
- Publication number
- JP2003222734A JP2003222734A JP2002020781A JP2002020781A JP2003222734A JP 2003222734 A JP2003222734 A JP 2003222734A JP 2002020781 A JP2002020781 A JP 2002020781A JP 2002020781 A JP2002020781 A JP 2002020781A JP 2003222734 A JP2003222734 A JP 2003222734A
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- hermetically
- sealing member
- coating
- airtight
- 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
- Light Guides In General And Applications Therefor (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、光伝送モジュール
に用いるＬＤアレイやＰＤアレイ等から構成される光モ
ジュール等に結合される、光ファイバの気密封止構造及
びこれを用いた光ファイバアレイに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hermetically sealed optical fiber structure and an optical fiber array using the same, which is coupled to an optical module such as an LD array or a PD array used for an optical transmission module. It is a thing.
【０００２】[0002]
【従来の技術】光伝送モジュールに用いるＬＤアレイや
ＰＤアレイ等から構成される光モジュール等では、光モ
ジュール等に組み込まれている受光もしくは発光素子の
駆動安定性の点から、外界から密封されることが望まし
いとされている。光モジュールに結合される光ファイ
バ、光ファイバアレイ等には、前記理由より、気密封止
構造が求められている。2. Description of the Related Art In an optical module, such as an LD array or a PD array, used in an optical transmission module, it is sealed from the outside in view of driving stability of a light receiving or light emitting element incorporated in the optical module. Is said to be desirable. For the above reason, the hermetically sealed structure is required for the optical fiber, the optical fiber array, etc. coupled to the optical module.
【０００３】図３に従来の光ファイバの気密封止構造を
示す。図３に示すように従来の光ファイバの気密封止構
造は、光ファイバ４の被覆部４ａが一部除去された部分
全てにメタライズ部４ｂが形成され、前記光ファイバ被
覆部４ａとメタライズ部４ｂを内包することができる貫
通孔５ａが設けられている金属製の気密接続部材５を用
いて気密封止している。前記貫通孔５ａに光ファイバ４
を挿入し、はんだやろう材からなる気密封止材料６を気
密接続部材５内に注入し外部より加熱を行って溶融さ
せ、光ファイバのメタライズ部４ｂと気密接続部５を固
定することで気密封止を実現している（特開２００１−
３０５３８０号公報参照）。FIG. 3 shows a conventional airtight sealing structure for an optical fiber. As shown in FIG. 3, in the conventional hermetically sealed structure of an optical fiber, a metallized portion 4b is formed on the entire portion of the optical fiber 4 where the coating portion 4a is partially removed. The optical fiber coating portion 4a and the metallized portion 4b are formed. Is hermetically sealed by using a metal hermetic connection member 5 provided with a through hole 5a capable of enclosing. The optical fiber 4 in the through hole 5a
By inserting the airtight sealing material 6 made of solder or brazing material into the airtight connecting member 5 and heating it from the outside to melt it, and fixing the metallized portion 4b and the airtight connecting portion 5 of the optical fiber. A tight seal is realized (Japanese Patent Laid-Open No. 2001-2001).
305380).
【０００４】このような従来の光ファイバの気密封止構
造は、例えば図４に示すような気密封止してなる光ファ
イバアレイに使用される。図４に示すように従来の気密
封止してなる光ファイバアレイは、高精度なＶ溝加工が
施されたＶ溝基板７、Ｖ溝上に整列された前記気密接続
部材５を有する光ファイバ９、光ファイバ９が浮き上が
らないよう光ファイバ９を押さえる押さえ板８、Ｖ溝基
板７、光ファイバ９、押さえ板８の固定を行いかつＶ溝
基板７と押さえ板８の間に充填される接着剤１０からな
る。Such a conventional hermetically sealed structure of an optical fiber is used, for example, in an hermetically sealed optical fiber array as shown in FIG. As shown in FIG. 4, a conventional hermetically sealed optical fiber array has an optical fiber 9 having a V-groove substrate 7 on which highly precise V-groove processing has been performed, and the hermetic connection member 5 aligned on the V-groove. An adhesive agent that fixes the pressing plate 8, the V-groove substrate 7, the optical fiber 9 and the pressing plate 8 that press the optical fiber 9 so that the optical fiber 9 does not float and that is filled between the V-groove substrate 7 and the pressing plate 8. It consists of 10.
【０００５】[0005]
【発明が解決しようとする課題】しかしながら、図３に
示すような従来の光ファイバの気密封止構造の場合、気
密接続部材５内に光ファイバ被覆部３ａが挿入されてい
るため、気密封止のため外部より加熱を行う工程の際に
はんだやろう材からなる気密封止材料６だけではなく、
光ファイバ被覆部３ａも溶融してしまう。光ファイバ被
覆部３ａが溶融した場合、被覆部からガスが発生し光モ
ジュール等に組み込まれている受光もしくは発光素子の
駆動安定性に悪影響を与えてしまう。また被覆が溶融し
たときに気密接続部材５内に応力が生じて、その応力に
よって光ファイバ４が破損しやすくなるという欠点を有
している。However, in the case of the conventional airtight sealing structure of the optical fiber as shown in FIG. 3, since the optical fiber coating portion 3a is inserted in the airtight connecting member 5, the airtight sealing is achieved. Therefore, not only the airtight sealing material 6 made of solder or brazing material in the step of heating from the outside,
The optical fiber coating 3a also melts. When the optical fiber coating 3a is melted, gas is generated from the coating and adversely affects the driving stability of the light receiving or light emitting element incorporated in the optical module or the like. Further, when the coating is melted, stress is generated in the airtight connection member 5, and the stress causes the optical fiber 4 to be easily damaged.
【０００６】また、従来の光ファイバの気密封止構造で
は気密封止材料６としてはんだを使用するのが一般的で
あるが、はんだを使用する場合は光ファイバの被覆を除
去した部分全域にわたってメタライズ加工を施す必要が
あり、このメタライズ加工のためコストが高くなるとい
う欠点を有していた。Further, in the conventional airtight sealing structure of an optical fiber, solder is generally used as the airtight sealing material 6. However, when solder is used, metallization is performed over the entire area of the optical fiber where the coating is removed. It is necessary to perform processing, and this metallization has a drawback that the cost is high.
【０００７】本発明は、上述の欠点に鑑み案出されたも
のであり、その目的は光ファイバの被覆を溶融させない
ようにするとともに、光ファイバのメタライズ加工の費
用を抑えた光ファイバの気密封止構造及びそれを用いた
気密光ファイバアレイを提供することにある。The present invention has been devised in view of the above-mentioned drawbacks, and its object is to prevent the coating of the optical fiber from melting and to hermetically seal the optical fiber while suppressing the cost of metallizing the optical fiber. A stop structure and an airtight optical fiber array using the stop structure are provided.
【０００８】[0008]
【課題を解決するための手段】上記従来の問題点に鑑み
て、本発明は、光ファイバの被覆の中間部を一部除去
し、この被覆除去部を気密封止部材の貫通孔内で気密固
定してなり、上記光ファイバの被覆部が上記気密封止部
材の貫通孔の外側にあることを特徴とするものである。In view of the above-mentioned problems of the prior art, the present invention removes a part of an intermediate portion of a coating of an optical fiber, and hermetically removes the coating in a through hole of a hermetic sealing member. It is characterized in that it is fixed and the coating portion of the optical fiber is outside the through hole of the hermetic sealing member.
【０００９】また、前記気密封止部材の貫通孔中央部に
気密封止材料の注入口を設けたことを特徴とするもので
ある。The airtight sealing member is characterized in that an inlet for the airtight sealing material is provided at the center of the through hole of the airtight sealing member.
【００１０】また、前記気密封止部材の貫通孔は、中央
部付近の断面積が最も小さく、両端側に向かって断面積
が大きくなる形状であることを特徴とするものである。Further, the through hole of the airtight sealing member is characterized in that the cross-sectional area near the central portion is the smallest and the cross-sectional area increases toward both ends.
【００１１】さらに、前記気密封止材料が気密封止部材
の中央部のみに存在し、両端部は別の材料で充填されて
いることを特徴とするものである。Further, the hermetic sealing material is present only in the central portion of the hermetic sealing member, and both ends are filled with another material.
【００１２】さらに、前記気密封止材料が低融点ガラス
であることを特徴とするものである。Further, the hermetic sealing material is a low melting point glass.
【００１３】本発明の光ファイバの気密封止構造によれ
ば、１以上の光ファイバの被覆の中間部を一部除去した
部分に気密封止部材を有する光ファイバにおいて、光フ
ァイバの被覆部が気密封止部材の外側にあることから、
光ファイバの被覆が気密封止のため外部より加熱を行う
工程の際に被覆が溶融するのを防ぐことができ、また被
覆の溶融時に発生するガスによって、光モジュール等に
組み込まれている受光もしくは発光素子の駆動安定性に
悪影響を与えることを抑えることができ、またさらに、
被覆が溶融したときに生じる気密接続部内の応力のよっ
て光ファイバを破損しやすくなるということを防止する
ことができる。According to the hermetically sealing structure of the optical fiber of the present invention, in the optical fiber having the hermetically sealing member in the part where the intermediate part of the coating of one or more optical fibers is partially removed, the coating part of the optical fiber is Since it is on the outside of the airtight sealing member,
Since the coating of the optical fiber is hermetically sealed, it is possible to prevent the coating from melting during the process of heating from the outside, and the gas generated during melting of the coating allows the light reception or It is possible to prevent the driving stability of the light emitting element from being adversely affected, and further,
It is possible to prevent the optical fiber from being easily broken due to the stress in the airtight connection portion generated when the coating is melted.
【００１４】また、本発明の光ファイバの気密封止構造
によれば、気密封止部材中央に気密封止材料の注入口を
設けたことから、気密封止作業を行う際、中央部付近の
みに気密封止材料を注入すればよいため、気密封止材料
の使用量を少なくすることができ、また光ファイバがメ
タライズ加工されている場合にはメタライズ加工部分を
小さくすることができるため、安価な光ファイバの気密
封止構造を提供することができる。さらに光ファイバの
被覆に加わる熱を減ずることができ、光ファイバの被覆
が溶融するのを防ぐこともできるため、安定した光ファ
イバの気密封止構造を得ることができる。Further, according to the hermetically sealing structure of the optical fiber of the present invention, since the injection port of the hermetically sealing material is provided at the center of the hermetically sealing member, only the vicinity of the central portion is subjected to the hermetically sealing operation. Since it is only necessary to inject the airtight sealing material into the, it is possible to reduce the amount of use of the airtight sealing material. Also, if the optical fiber is metallized, the metallized portion can be made smaller, so it is inexpensive. It is possible to provide a hermetically sealed structure for various optical fibers. Further, the heat applied to the coating of the optical fiber can be reduced and the coating of the optical fiber can be prevented from melting, so that a stable hermetically sealed structure of the optical fiber can be obtained.
【００１５】さらに、本発明の光ファイバの気密封止構
造によれば、前記気密封止部材において、気密封止部材
内部の中央部付近の断面積が一番小さくなっており、両
端側に向かって断面積が大きくなる形状を有したことか
ら、光ファイバの被覆に加わる熱を減ずることができ、
光ファイバの被覆が溶融するのを防ぐこともできるた
め、安定した光ファイバの気密封止構造を得ることがで
きる。Further, according to the hermetically sealing structure of the optical fiber of the present invention, in the hermetically sealing member, the cross-sectional area in the vicinity of the central portion inside the hermetically sealing member is the smallest, and is directed toward both end sides. Since it has a shape with a large cross-sectional area, it is possible to reduce the heat applied to the coating of the optical fiber,
Since it is possible to prevent the coating of the optical fiber from melting, a stable hermetically sealed structure of the optical fiber can be obtained.
【００１６】また、本発明の光ファイバの気密封止構造
によれば、前記気密封止部材において、気密封止材料が
気密封止部材中央部のみに存在し、気密封止部材両端は
その他の材料で充填されていることから、気密封止材料
の使用量を少なくすることができ、安価な光ファイバの
気密封止構造を提供することができる。Further, according to the hermetically sealing structure of the optical fiber of the present invention, in the hermetically sealing member, the hermetically sealing material is present only in the central portion of the hermetically sealing member, and both ends of the hermetically sealing member are made of other materials. Since it is filled with the material, the amount of the hermetically sealing material used can be reduced, and an inexpensive hermetically sealing structure for an optical fiber can be provided.
【００１７】さらに、本発明の光ファイバの気密封止構
造によれば、前記気密封止部材の気密封止材料が、低融
点ガラスであることから、光ファイバに高価なメタライ
ズ加工をする必要がなくなるため、安価な光ファイバの
気密封止構造を提供することができる。Furthermore, according to the hermetically sealing structure of the optical fiber of the present invention, since the hermetically sealing material of the hermetically sealing member is a low melting point glass, it is necessary to subject the optical fiber to expensive metallization. Since it is eliminated, it is possible to provide an inexpensive optical fiber hermetically sealing structure.
【００１８】[0018]
【発明の実施の形態】次いで、本発明の実施の形態を図
面に基いて説明する。DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, embodiments of the present invention will be described with reference to the drawings.
【００１９】本発明の光ファイバの気密封止構造は、図
１に示すように、１以上の光ファイバ１の被覆１ａの中
間部を一部除去した部分の一部にメタライズ部１ｂが形
成され、前記光ファイバ被覆部１ａが除去された部分と
メタライズ部１ｂを内包することができる貫通孔２ａお
よび中央部に気密封止材料３の注入口２ｂが設けられて
いる金属製の気密接続部材２で気密封止してなる。前記
メタライズ部１ｂは光ファイバ被覆部１ａを除去した部
分の一部のみに施されていること、光ファイバ被覆部１
ａが気密封止部材２の貫通孔２ａの外部に存在し、貫通
孔２ａの内部に光ファイバ被覆部１ａが存在しないこと
が重要である。In the hermetically sealed structure of an optical fiber according to the present invention, as shown in FIG. 1, a metallized portion 1b is formed in a part of a portion of the coating 1a of one or more optical fibers 1 where an intermediate portion is partially removed. , A metal airtight connecting member 2 having a through hole 2a capable of containing the portion where the optical fiber coating portion 1a is removed and the metallized portion 1b and an injection port 2b of the airtight sealing material 3 in the central portion. It is hermetically sealed with. The metallized portion 1b is provided only on a part of the portion where the optical fiber coating portion 1a is removed.
It is important that a exists outside the through hole 2a of the hermetic sealing member 2 and that the optical fiber coating portion 1a does not exist inside the through hole 2a.
【００２０】前記気密封止部材２の貫通孔２ａの形状
は、気密封止材料３の注入口２ｂが設けられている中央
部付近の断面積が最も小さく、両端側に向かって断面積
が大きくなっていることが好ましい。中央部付近の貫通
孔２ａの断面積は、０．５ｍｍ 2〜５００ｍｍ2程度であ
れば、より好ましい。断面積が０．５ｍｍ2より小さい
場合は、光ファイバ１を気密封止部材２に挿入するのが
困難であるし、５００ｍｍ2より大きい場合は、光ファ
イバ１と中央部付近の内壁との間のクリアランスが大き
くなり過ぎてしまい、光ファイバ１を気密封止部材２に
気密封止固定することが難しくなり、さらに気密封止固
定のために使用する気密封止材料３の使用量が多くなっ
てしまうためである。Shape of the through hole 2a of the airtight sealing member 2
Is the center where the inlet 2b for the hermetic sealing material 3 is provided
The cross-sectional area in the vicinity of the
Is preferably large. Penetration near the center
The cross-sectional area of the hole 2a is 0.5 mm 2~ 500 mm2To the extent
Is more preferable. Section area is 0.5 mm2Less than
In this case, inserting the optical fiber 1 into the hermetic sealing member 2 is
Difficult and 500mm2If it is larger,
Large clearance between Ibar 1 and the inner wall near the center
The optical fiber 1 becomes the airtight sealing member 2
Airtight sealing becomes difficult to fix, and further airtight sealing is fixed.
The amount of hermetic sealing material 3 used for
This is because it will end up.
【００２１】さらに気密封止材料３は気密封止部材２の
注入口２ｂが設けられている中央部付近にのみ存在し、
気密封止部材２の両端はエポキシやシリコンなどその他
の材料（不図示）で充填されていることが好ましい。こ
れは気密封止材料３を注入して気密封止部材２と光ファ
イバ１を固定する際の熱を断面積が大きくなっている形
状によって両端側で放熱させ、光ファイバ被覆１ａに出
来るだけ熱を伝えないようにするためである。気密封止
材料３が気密封止部材２の注入口２ｂが設けられている
中央部付近にのみ存在すれば、より一層前述の効果が期
待できる。Further, the hermetic sealing material 3 exists only near the central portion of the hermetic sealing member 2 where the injection port 2b is provided,
Both ends of the hermetic sealing member 2 are preferably filled with another material (not shown) such as epoxy or silicon. This is because the heat when fixing the airtight sealing member 2 and the optical fiber 1 by injecting the airtight sealing material 3 is radiated at both ends by the shape having a large cross-sectional area, and the heat is applied to the optical fiber coating 1a as much as possible. This is to prevent it from being transmitted. If the hermetic sealing material 3 exists only in the vicinity of the central portion of the hermetic sealing member 2 where the injection port 2b is provided, the above-described effect can be further expected.
【００２２】また気密封止材料３が気密封止部材２の注
入口２ｂが設けられている中央部付近にのみ存在する場
合、高価な気密封止材料３の使用量を減らすことができ
るとともに、光ファイバ１にメタライズ加工を施す長さ
を短くすることができるため、加工コストを低減させる
ことができる。When the hermetic sealing material 3 is present only in the vicinity of the central portion of the hermetic sealing member 2 where the injection port 2b is provided, the amount of the expensive hermetic sealing material 3 used can be reduced and Since the length of metallizing the optical fiber 1 can be shortened, the processing cost can be reduced.
【００２３】気密封止部材２が中央部付近にのみ存在す
る場合の存在範囲としては、気密封止部材２の中央から
両端側へ向かってそれぞれ、片側の長さが０．２ｍｍ〜
２０ｍｍの範囲であることが好ましい。０．２ｍｍより
小さい場合は気密封止するには不十分であり、２０ｍｍ
より長い場合は気密封止部材３の使用量が多くなり、コ
ストを低減させる効果が十分に得られない。When the airtight sealing member 2 exists only in the vicinity of the central portion, the range of existence is 0.2 mm on one side from the center of the airtight sealing member 2 toward both ends.
It is preferably in the range of 20 mm. If it is smaller than 0.2 mm, it is insufficient for hermetic sealing, and it is 20 mm.
If the length is longer, the amount of the hermetic sealing member 3 used increases, and the effect of reducing the cost cannot be sufficiently obtained.
【００２４】前記気密封止部材２の形状は図１に示され
るようなテーパ形状であってもよいし、図２（ａ）、
（ｂ）に示すようなＲ形状や矩形の段付き形状であって
も同様の効果が得られる。The airtight sealing member 2 may have a tapered shape as shown in FIG. 1, or as shown in FIG.
The same effect can be obtained with an R shape or a rectangular stepped shape as shown in (b).
【００２５】前記メタライズ部１ｂの長さは、１〜３０
ｍｍ程度であることが好ましい。メタライズ部１ｂの長
さが１ｍｍより短い場合は、気密封止材料３を注入して
気密封止部材２と固定を行う際の強度が不足したり、十
分な気密封止効果が得られないことが考えられる。また
メタライズ部１ｂの長さが３０ｍｍより長い場合は、前
述の光ファイバにメタライズ加工を施す長さを短くして
加工コストを低減させる効果が十分に得られない。The metallized portion 1b has a length of 1 to 30.
It is preferably about mm. When the length of the metallized portion 1b is shorter than 1 mm, the strength when the airtight sealing material 3 is injected and fixed to the airtight sealing member 2 is insufficient, or a sufficient airtight sealing effect cannot be obtained. Can be considered. Further, if the length of the metallized portion 1b is longer than 30 mm, the effect of reducing the processing cost by shortening the metallized length of the optical fiber cannot be sufficiently obtained.
【００２６】前記気密封止材料３の材料としては、はん
だや銀ろうなどのろう材、低融点ガラスなどが好まし
い。特に気密封止材料として低融点ガラスを用いた場
合、光ファイバに施すメタライズ加工が不要となるた
め、加工コストを大幅に低減させることができる。As the material of the hermetic sealing material 3, a brazing material such as solder or silver brazing material, a low melting point glass and the like are preferable. In particular, when low melting point glass is used as the airtight sealing material, the metallizing process applied to the optical fiber is not required, and the processing cost can be significantly reduced.
【００２７】また気密封止部材２の両端に充填する材料
としては、エポキシ樹脂、アクリル樹脂、ポリイミド樹
脂、シリコン等を用いることが好ましい。これらの材料
は、はんだや銀ろうなどのろう材、低融点ガラスなどの
気密封止材料よりも安価であるため、気密封止部材全体
に気密封止材料を充填する場合よりも、材料費を低減さ
せることができる。Further, it is preferable to use epoxy resin, acrylic resin, polyimide resin, silicon or the like as a material to be filled at both ends of the hermetic sealing member 2. Since these materials are cheaper than brazing materials such as solder and silver brazing, and airtight sealing materials such as low-melting glass, the material cost is lower than that when the whole airtight sealing member is filled with the airtight sealing material. Can be reduced.
【００２８】前記光ファイバ被覆部１ａは気密封止部材
２よりも１ｍｍ以上離れていることが好ましい。１ｍｍ
より気密封止部材２に近い場合は、気密封止を行う際の
熱によって被覆が溶融する恐れがあるためである。The optical fiber coating portion 1a is preferably separated from the hermetic sealing member 2 by 1 mm or more. 1 mm
This is because, when it is closer to the airtight sealing member 2, the coating may be melted by the heat when performing the airtight sealing.
【００２９】なお気密封止部材２の材料としては、ステ
ンレス鋼、鉄ニッケル合金、アルミニウム、コバール材
等の金属材等から形成することが好ましい。特に、光パ
ッケージに組み込んで固定する際に用いるＹＡＧレーザ
溶接の可能な材料を用いるのが好ましい。The airtight sealing member 2 is preferably made of a metal material such as stainless steel, iron-nickel alloy, aluminum or Kovar material. In particular, it is preferable to use a material that can be YAG laser welded when it is incorporated in an optical package and fixed.
【００３０】なお、本発明の光ファイバの気密封止構造
は上述の実施形態に限定されるものではなく、種々の変
更は可能であり、シングルモ−ド光ファイバ、マルチモ
ード光ファイバ、偏波保存光ファイバ、およびこれらの
多芯光ファイバ共に適用することができる。また、複数
の光ファイバを用いて、上記構造で気密封止することに
よって光ファイバアレイとすることができる。The hermetically sealing structure of the optical fiber of the present invention is not limited to the above-mentioned embodiment, but various modifications can be made. Single mode optical fiber, multimode optical fiber, polarization preserving Both the optical fiber and these multi-core optical fibers can be applied. Moreover, an optical fiber array can be obtained by hermetically sealing the above structure using a plurality of optical fibers.
【００３１】[0031]
【実施例】図１に示すような光ファイバの気密封止構造
を製作した。EXAMPLE An optical fiber hermetically sealed structure as shown in FIG. 1 was manufactured.
【００３２】まず４芯の多芯シングルモード光ファイバ
の被覆中間部を１２ｍｍ除去した。次いで、ステンレス
鋼材料を切削加工して外径５ｍｍ、長さ８ｍｍの外形を
有し、両端部から中央部へ向かって３ｍｍから１ｍｍの
径へと徐々に小さくなるテーパと中央部に１ｍｍの長さ
の平坦部を有する内部形状、中央部に１ｍｍ×１ｍｍの
正方形の注入口を有する円筒形の気密封止部材品を作製
した。First, 12 mm of the coating intermediate portion of the 4-core multi-core single mode optical fiber was removed. Then, a stainless steel material is cut to have an outer diameter of 5 mm and a length of 8 mm, and the taper gradually decreases from the both ends toward the center to 3 mm to 1 mm and the center has a length of 1 mm. A cylindrical hermetic sealing member product having an internal shape having a flat portion and a square injection port of 1 mm × 1 mm in the central portion was produced.
【００３３】前述のように得られた光ファイバを、前記
気密封止部材に挿入した。この際、光ファイバの被覆部
が気密封止部材内部に存在しないよう確認を行った。し
かる後、気密封止部材品の注入口より事前に加熱を行い
溶融させた低融点ガラスを注入し、光ファイバと気密封
止部材を中央部で固定した。The optical fiber obtained as described above was inserted into the hermetically sealing member. At this time, it was confirmed that the coating portion of the optical fiber did not exist inside the airtight sealing member. Then, the low melting point glass which was heated and melted in advance was injected from the injection port of the hermetically sealed member, and the optical fiber and the hermetically sealed member were fixed at the central portion.
【００３４】低融点ガラスが十分冷却した後、気密封止
部材の両端にエポキシを充填させ、光ファイバの気密封
止構造試料を１０本得た。After the low-melting glass was sufficiently cooled, both ends of the hermetically sealing member were filled with epoxy to obtain 10 hermetically sealed structural samples of the optical fiber.
【００３５】また比較例として図３に示すような光ファ
イバの気密封止構造を得るため、まず上述と同様に４芯
の多芯シングルモード光ファイバの被覆中間部を６ｍｍ
除去した。次いでステンレス鋼材料を切削加工して外径
５ｍｍ、長さ８ｍｍ、内径１ｍｍで中央部に１ｍｍ×１
ｍｍの正方形の注入口を有する円筒形の気密封止部材を
得た。In order to obtain a hermetically sealed structure of an optical fiber as shown in FIG. 3 as a comparative example, first, in the same manner as described above, a coating intermediate portion of a 4-core multicore single mode optical fiber is set to 6 mm.
Removed. Then, the stainless steel material is cut to have an outer diameter of 5 mm, a length of 8 mm, an inner diameter of 1 mm, and a central portion of 1 mm x 1
A cylindrical hermetic sealing member having a square injection port of mm was obtained.
【００３６】前述のように得られた光ファイバを、前記
気密封止部材に挿入した。この際、光ファイバの被覆部
が気密封止部材の内部に挿入されていることの確認を行
った。しかる後、気密封止部材の注入口より事前に加熱
を行い溶融させた低融点ガラスを気密封止部材内部全体
に充填するよう注入し、光ファイバの気密封止構造試料
を１０本得た。The optical fiber obtained as described above was inserted into the hermetically sealing member. At this time, it was confirmed that the coating portion of the optical fiber was inserted inside the airtight sealing member. Then, the low melting point glass which was heated and melted in advance from the inlet of the airtight sealing member was injected so as to fill the entire inside of the airtight sealing member to obtain 10 airtight sealing structure samples of the optical fiber.
【００３７】そしてそれぞれの光ファイバの気密封止構
造のヘリウムリーク試験、４０倍の双眼検査による光フ
ァイバの被覆部の外観検査を行った。Then, a helium leak test of the hermetically sealed structure of each optical fiber and a visual inspection of the coating portion of the optical fiber by a 40 × binocular inspection were conducted.
【００３８】その結果を表１に示す。The results are shown in Table 1.
【００３９】[0039]
【表１】 [Table 1]
【００４０】表１から明らかなように、本発明の光ファ
イバの気密封止構造は光ファイバ被覆部が溶融すること
なく、１×１０-9Ｐａ・ｍ3／ｓｅｃ以下の気密度が得
られることがわかった。As is clear from Table 1, the hermetically sealed structure of the optical fiber according to the present invention can provide a hermeticity of 1 × 10 -9 Pa · m 3 / sec or less without melting the optical fiber coating. I understood it.
【００４１】これに対し、光ファイバ被覆部が気密封止
部材内部に存在する従来の光ファイバの気密封止構造で
は、１×１０-9Ｐａ・ｍ3／ｓｅｃ以下の気密度が得ら
れるものの、試料全ての被覆が溶融することがわかっ
た。On the other hand, in the conventional airtight sealing structure of the optical fiber in which the optical fiber coating portion is present inside the airtight sealing member, the airtightness of 1 × 10 −9 Pa · m 3 / sec or less can be obtained. It was found that the coating of all the samples melted.
【００４２】[0042]
【発明の効果】本発明の光ファイバの気密封止構造によ
れば、光ファイバの被覆の中間部を一部除去し、この被
覆除去部を気密封止部材の貫通孔内で気密固定し、上記
光ファイバの被覆部が上記気密封止部材の外側にあるこ
とから、光ファイバの被覆が気密封止のため外部より加
熱を行う工程の際に被覆が溶融するのを防ぐことがで
き、また被覆の溶融時に発生するガスによって、光モジ
ュール等に組み込まれている受光もしくは発光素子の駆
動安定性に悪影響を与えることを抑えることができ、ま
たさらに、被覆が溶融したときに生じる気密接続部内の
応力のよって光ファイバを破損しやすくなるということ
を防止することができる。According to the hermetically sealing structure of the optical fiber of the present invention, the intermediate portion of the coating of the optical fiber is partially removed, and the coating removing portion is hermetically fixed in the through hole of the hermetically sealing member, Since the coating portion of the optical fiber is outside the hermetic sealing member, the coating of the optical fiber can be prevented from melting during the step of heating from the outside for hermetic sealing, and It is possible to prevent the gas generated when the coating is melted from adversely affecting the driving stability of the light-receiving or light-emitting element incorporated in the optical module, etc. Furthermore, the gas inside the airtight connection part generated when the coating is melted can be suppressed. It is possible to prevent the optical fiber from being easily broken due to the stress.
【００４３】また、本発明の光ファイバの気密封止構造
によれば、気密封止部材中央に気密封止材料の注入口を
設けたことから、気密封止作業を行う際、中央部付近の
みに気密封止材料を注入すればよいため、気密封止材料
の使用量を少なくすることができ、また光ファイバがメ
タライズ加工されている場合にはメタライズ加工部分を
小さくすることができるため、安価な光ファイバの気密
封止構造を提供することができる。さらに光ファイバの
被覆に加わる熱を減ずることができ、光ファイバの被覆
が溶融するのを防ぐこともできるため、安定した光ファ
イバの気密封止構造を得ることができる。Further, according to the airtight sealing structure of the optical fiber of the present invention, since the injection port of the airtight sealing material is provided in the center of the airtight sealing member, only the central portion near the central part when performing the airtight sealing operation. Since it is only necessary to inject the airtight sealing material into the, it is possible to reduce the amount of use of the airtight sealing material. Also, if the optical fiber is metallized, the metallized portion can be made smaller, so it is inexpensive. It is possible to provide a hermetically sealed structure for various optical fibers. Further, the heat applied to the coating of the optical fiber can be reduced and the coating of the optical fiber can be prevented from melting, so that a stable hermetically sealed structure of the optical fiber can be obtained.
【００４４】さらに、本発明の光ファイバの気密封止構
造によれば、前記気密封止部材の貫通孔は中央部付近の
断面積が最も小さく、両端側に向かって断面積が大きく
なる形状としたことから、光ファイバの被覆に加わる熱
を減ずることができ、光ファイバの被覆が溶融するのを
防ぐこともできるため、安定した光ファイバの気密封止
構造を得ることができる。Further, according to the hermetically sealing structure of the optical fiber of the present invention, the through hole of the hermetically sealing member has a shape in which the cross-sectional area near the center is the smallest and the cross-sectional area increases toward both ends. As a result, the heat applied to the coating of the optical fiber can be reduced, and the coating of the optical fiber can be prevented from melting, so that a stable hermetically sealed structure of the optical fiber can be obtained.
【００４５】またさらに、本発明の光ファイバの気密封
止構造によれば、前記気密封止部材において、気密封止
材料が気密封止部材中央部のみに存在し、気密封止部材
両端はその他の材料で充填されていることから、気密封
止材料の使用量を少なくすることができ、安価な光ファ
イバの気密封止構造を提供することができる。Further, according to the hermetically sealing structure of the optical fiber of the present invention, in the hermetically sealing member, the hermetically sealing material is present only in the central portion of the hermetically sealing member, and both ends of the hermetically sealing member are Since it is filled with the material described above, the amount of the hermetically sealing material used can be reduced, and an inexpensive hermetically sealing structure for an optical fiber can be provided.
【００４６】またさらに、本発明の光ファイバの気密封
止構造によれば、前記気密封止部材の気密封止材料が低
融点ガラスであることから、光ファイバに高価なメタラ
イズ加工をする必要がなくなるため、安価な光ファイバ
の気密封止構造を提供することができる。Furthermore, according to the hermetically sealing structure of the optical fiber of the present invention, since the hermetically sealing material of the hermetically sealing member is a low melting point glass, it is necessary to subject the optical fiber to expensive metallization. Since it is eliminated, it is possible to provide an inexpensive optical fiber hermetically sealing structure.
【図１】本発明の光ファイバの気密封止構造の一実施形
態を示す断面図である。FIG. 1 is a cross-sectional view showing one embodiment of an optical fiber hermetically sealing structure of the present invention.
【図２】（ａ）（ｂ）は本発明の光ファイバの気密封止
構造の気密封止部材の他の形状を示す断面図である。2A and 2B are cross-sectional views showing another shape of the hermetically sealing member of the optical fiber hermetically sealing structure of the present invention.
【図３】従来の光ファイバの気密封止構造を示す断面図
である。FIG. 3 is a cross-sectional view showing a conventional airtight sealing structure of an optical fiber.
【図４】従来の気密封止用光ファイバアレイを示す斜視
図である。FIG. 4 is a perspective view showing a conventional hermetically sealing optical fiber array.
１：光ファイバ １ａ：光ファイバ被覆部 １ｂ：メタライズ部 ２：気密封止部材 ２ａ：貫通孔 ２ｂ：注入口 ３：気密封止材料 ３ａ：貫通孔 ４：光ファイバ ４ａ：光ファイバ被覆部 ４ｂ：メタライズ部 ５：気密封止部材 ５ａ：貫通孔 ６：気密封止材料 ７：Ｖ溝基板 ８：押さえ板 ９：光ファイバ １０：接着剤 １１：気密封止部材 1: Optical fiber 1a: optical fiber coating 1b: Metallized part 2: Airtight sealing member 2a: through hole 2b: inlet 3: Airtight sealing material 3a: Through hole 4: Optical fiber 4a: optical fiber coating 4b: Metallized part 5: Airtight sealing member 5a: Through hole 6: Airtight sealing material 7: V-groove substrate 8: Press plate 9: Optical fiber 10: Adhesive 11: Airtight sealing member
Claims (6)
この被覆除去部を気密封止部材の貫通孔内で気密固定し
てなり、上記光ファイバの被覆部が上記気密封止部材の
貫通孔の外側にあることを特徴とする光ファイバの気密
封止構造。1. An intermediate portion of a coating of an optical fiber is partially removed,
The coating-removed portion is hermetically fixed in the through hole of the airtight sealing member, and the coating portion of the optical fiber is outside the through hole of the airtight sealing member. Construction.
止材料の注入口を設けたことを特徴とする請求項１記載
の光ファイバの気密封止構造。2. The hermetically sealing structure for an optical fiber according to claim 1, wherein an injection port of the hermetically sealing material is provided at a central portion of the through hole of the hermetically sealing member.
の断面積が最も小さく、両端側に向かって断面積が大き
くなる形状であることを特徴とする請求項１または２記
載の光ファイバの気密封止構造。3. The through hole of the hermetically sealing member has a shape in which the cross-sectional area near the central portion is the smallest and the cross-sectional area increases toward both end sides. Optical fiber hermetically sealed structure.
のみに存在し、両端部は別の材料で充填されていること
を特徴とする請求項１〜３のいずれかに記載の光ファイ
バの気密封止構造。4. The airtight sealing material is present only in the central portion of the airtight sealing member, and both end portions are filled with another material, according to any one of claims 1 to 3. Optical fiber hermetically sealed structure.
とを特徴とする請求項１〜４のいずれかに記載の光ファ
イバの気密封止構造。5. The hermetically sealing structure for an optical fiber according to claim 1, wherein the hermetically sealing material is a low melting point glass.
バの気密封止構造を使用して複数の光ファイバを気密封
止してなる光ファイバアレイ。6. An optical fiber array obtained by hermetically sealing a plurality of optical fibers by using the hermetically sealing structure for optical fibers according to claim 1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002020781A JP3847178B2 (en) | 2002-01-29 | 2002-01-29 | Hermetic sealing structure of optical fiber and optical fiber array using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002020781A JP3847178B2 (en) | 2002-01-29 | 2002-01-29 | Hermetic sealing structure of optical fiber and optical fiber array using the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2003222734A true JP2003222734A (en) | 2003-08-08 |
| JP3847178B2 JP3847178B2 (en) | 2006-11-15 |
Family
ID=27744184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002020781A Expired - Fee Related JP3847178B2 (en) | 2002-01-29 | 2002-01-29 | Hermetic sealing structure of optical fiber and optical fiber array using the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3847178B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007041267A (en) * | 2005-08-03 | 2007-02-15 | Sumitomo Electric Ind Ltd | Optical connecting component and connecting method of the same |
-
2002
- 2002-01-29 JP JP2002020781A patent/JP3847178B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007041267A (en) * | 2005-08-03 | 2007-02-15 | Sumitomo Electric Ind Ltd | Optical connecting component and connecting method of the same |
| JP4715374B2 (en) * | 2005-08-03 | 2011-07-06 | 住友電気工業株式会社 | Optical connecting component and optical connecting component connecting method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3847178B2 (en) | 2006-11-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2614018B2 (en) | Hermetic sealing structure and hermetic sealing method for optical fiber introduction section | |
| US4708429A (en) | Optical fiber assembly and optically coupled device package including same | |
| EP2799919A1 (en) | Mounting and fixing structure for optical fibre of photoelectron device | |
| US6643446B2 (en) | Hermetic fiber ferrule and feedthrough | |
| JPH0452635B2 (en) | ||
| US5970194A (en) | Optical fiber having hermetically sealable section | |
| EP2339385B1 (en) | Hermetic seal between a package and an optical fiber | |
| JP2000515687A (en) | Semiconductor photodetector packaging | |
| EP0608895B1 (en) | Airtight seal structure of low melting point glass to be used in optical fiber guiding portion of optical device and method of airtight seal using low melting point glass | |
| JP2001281498A (en) | Optical element module | |
| KR100285114B1 (en) | Lead Frames and Optical Semiconductor Devices for Optical Semiconductor Devices | |
| US7309175B1 (en) | Reducing heating from non-coupled light in power transmitting optical fibers | |
| US20030190135A1 (en) | Hermetic waveguide seals and method of making them | |
| US6623176B2 (en) | Optical fiber assembly and method for suppressing optical instabilities due to improperly cured epoxy | |
| US6474879B1 (en) | Post assembly metallization of a device to form hermetic seal | |
| JP2003222734A (en) | Airtight sealing structure of optical fiber, and optical fiber array using the same | |
| JP2007298643A (en) | Optical element module and method for manufacturing the same | |
| US20030044126A1 (en) | Optical module and method of manufacturing the optical module | |
| JPS63228112A (en) | Module for coupling semiconductor laser and optical fiber | |
| JP2800760B2 (en) | Optical semiconductor module | |
| US20020179683A1 (en) | Hermetic optical fiber seal | |
| JP3311437B2 (en) | Optical fiber array terminal | |
| US6953286B2 (en) | Ferrule for hermetically packaging optical fibers | |
| JP2005165200A (en) | Optical device and its manufacturing method | |
| KR0155537B1 (en) | Laser diode modules for optical amplification and process for preparing them |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A621 | Written request for application examination |
Free format text: JAPANESE INTERMEDIATE CODE: A621 Effective date: 20040716 |
|
| A977 | Report on retrieval |
Free format text: JAPANESE INTERMEDIATE CODE: A971007 Effective date: 20060110 |
|
| A131 | Notification of reasons for refusal |
Free format text: JAPANESE INTERMEDIATE CODE: A131 Effective date: 20060124 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20060324 |
|
| TRDD | Decision of grant or rejection written | ||
| A01 | Written decision to grant a patent or to grant a registration (utility model) |
Free format text: JAPANESE INTERMEDIATE CODE: A01 Effective date: 20060808 |
|
| A61 | First payment of annual fees (during grant procedure) |
Free format text: JAPANESE INTERMEDIATE CODE: A61 Effective date: 20060822 |
|
| R150 | Certificate of patent (=grant) or registration of utility model |
Free format text: JAPANESE INTERMEDIATE CODE: R150 |
|
| A521 | Written amendment |
Free format text: JAPANESE INTERMEDIATE CODE: A523 Effective date: 20060324 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20090901 Year of fee payment: 3 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20100901 Year of fee payment: 4 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20110901 Year of fee payment: 5 |
|
| FPAY | Renewal fee payment (prs date is renewal date of database) |
Free format text: PAYMENT UNTIL: 20120901 Year of fee payment: 6 |
|
| LAPS | Cancellation because of no payment of annual fees |