JP2001305387A - Optical fiber collecting device and optical fiber bundle with collecting device - Google Patents
Optical fiber collecting device and optical fiber bundle with collecting deviceInfo
- Publication number
- JP2001305387A JP2001305387A JP2000117023A JP2000117023A JP2001305387A JP 2001305387 A JP2001305387 A JP 2001305387A JP 2000117023 A JP2000117023 A JP 2000117023A JP 2000117023 A JP2000117023 A JP 2000117023A JP 2001305387 A JP2001305387 A JP 2001305387A
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- fiber bundle
- bundle
- collecting device
- optical
- 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
Landscapes
- Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)
- Mechanical Coupling Of Light Guides (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は光ファイバ集束具及
び集束具付き光ファイバ束に関する。The present invention relates to an optical fiber bundle and an optical fiber bundle with a bundle.
【０００２】[0002]
【従来の技術】従来、複数本の光ファイバを集束して形
成された光ファイバ束が集束具として用いられる口金内
に挿入されてなり、光ファイバ間及び光ファイバ束と口
金とが接着剤で固定されている口金付き光ファイバ束が
知られている。しかし、このような光ファイバ束は、接
着剤が光ファイバ間や光ファイバ束と口金との間の隙間
に介在しているため光伝送性能が低いとともに、光ファ
イバ束を光源に接続して用いた場合に光源からの熱によ
り接着剤が劣化しやすく、耐久性に劣るという欠点があ
る。2. Description of the Related Art Conventionally, an optical fiber bundle formed by bundling a plurality of optical fibers is inserted into a base used as a focusing tool, and the space between the optical fibers and between the optical fiber bundle and the base are bonded with an adhesive. A fixed optical fiber bundle with a cap is known. However, such an optical fiber bundle has low optical transmission performance because an adhesive is interposed between the optical fibers or a gap between the optical fiber bundle and the base, and is used by connecting the optical fiber bundle to a light source. In such a case, the adhesive easily deteriorates due to heat from the light source, resulting in poor durability.
【０００３】一方、光ファイバ束を金属口金に挿入しこ
れらを加熱することで、光ファイバを膨大化させると共
に光ファイバを軟化させ光ファイバ間及び光ファイバ束
と口金との間を融着させることにより、口金に光ファイ
バ束を固着する方法が提案されている。例えば、特開昭
５１−１４４６３２号公報においては、口金として口金
内径の一部が口金の両端の径より大きくなっている口金
を用い、その口金内に光ファイバを挿入し加熱により光
ファイバを膨大化させ、口金の内径が大きくなっている
部分に膨大化された光ファイバを充填し、光ファイバと
口金を固着する方法が、特開昭５０−１５３９４３号公
報においては、先端部に向かって内径が拡大する口金内
に、口金の先端部側に光ファイバ端面が位置するように
光ファイバ束を挿入し、加熱により光ファイバを膨大化
させ固着する方法が開示されている。しかし、これらの
方法には、融着時の加熱により口金の内壁近傍に配置さ
れる光ファイバの断面形状が歪んだりするので、光伝送
性能が低下するという欠点がある。On the other hand, the optical fiber bundle is inserted into a metal base and heated, thereby enlarging the optical fiber and softening the optical fiber to fuse the space between the optical fibers and between the optical fiber bundle and the base. Has proposed a method of fixing an optical fiber bundle to a base. For example, in JP-A-51-144632, a base is used in which a part of the inner diameter of the base is larger than the diameter of both ends of the base, an optical fiber is inserted into the base, and the optical fiber is enlarged by heating. Japanese Patent Application Laid-Open No. 50-153943 discloses a method of filling an enlarged optical fiber in a portion where the inner diameter of the base is increased and fixing the optical fiber and the base. A method is disclosed in which an optical fiber bundle is inserted into a base in which the optical fiber is enlarged such that the end face of the optical fiber is located on the tip side of the base, and the optical fiber is enlarged and fixed by heating. However, these methods have a drawback that the optical transmission performance is reduced because the cross-sectional shape of the optical fiber disposed near the inner wall of the die is distorted due to heating during fusion.
【０００４】[0004]
【発明が解決しようとする課題】これらの問題を解決す
るものとして熱可塑性樹脂からなる集束具内に光ファイ
バを融着、固定する方法が特開平１１−１０１９１６号
公報に開示されている。しかし、この方法は熱可塑性樹
脂を集束具として用いているので金属製の口金より強度
が劣り、また、強度を得るために熱可塑性樹脂製の集束
具の外周に金属口金を配置すると、光ファイバ束端面に
おける光の伝送に寄与しない部分の面積が大きくなり、
口金端面における光が入射される部分の面積の割合が小
さくなり、光入射部分の面積を十分に確保しようとする
と口金が大きくなるという問題点があった。To solve these problems, Japanese Patent Application Laid-Open No. H11-101916 discloses a method for fusing and fixing an optical fiber in a convergence tool made of a thermoplastic resin. However, since this method uses a thermoplastic resin as a bundle, the strength is inferior to that of a metal base, and when a metal base is arranged on the outer periphery of the thermoplastic bundle to obtain strength, an optical fiber The area of the portion that does not contribute to light transmission on the bundle end face increases,
There is a problem that the ratio of the area of the end face of the base where light is incident becomes small, and if the area of the light incident part is sufficiently secured, the base becomes large.
【０００５】本発明の目的は、光伝送性能や耐久性に優
れ、光ファイバ束と集束具が強固に固着されてなり、コ
ンパクトな集束具付き光ファイバ束及びこれに好適に用
いられる集束具を提供することにある。SUMMARY OF THE INVENTION An object of the present invention is to provide a compact optical fiber bundle with a focusing device, which is excellent in optical transmission performance and durability, in which an optical fiber bundle and a focusing device are firmly fixed, and a focusing device suitably used for the same. To provide.
【０００６】[0006]
【課題を解決するための手段】本発明の要旨は、筒状の
中空部を有し、中空部の壁面に凹部及び凸部の少なくと
も一方が形成されている光ファイバ集束具にある。SUMMARY OF THE INVENTION The gist of the present invention resides in an optical fiber concentrator having a cylindrical hollow portion, wherein at least one of a concave portion and a convex portion is formed on a wall surface of the hollow portion.
【０００７】また、本発明の要旨は、前記光ファイバ集
束具の中空部内に、少なくとも端部において互いに融着
された複数本の光ファイバからなる光ファイバ束の端部
が挿入、固定されてなる集束具付き光ファイバ束にあ
る。Further, the gist of the present invention is that an end portion of an optical fiber bundle composed of a plurality of optical fibers fused to each other at least at an end is inserted and fixed in a hollow portion of the optical fiber bundle. In an optical fiber bundle with a focusing tool.
【０００８】[0008]
【発明の実施の形態】以下本発明について詳細に説明す
る。DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below in detail.
【０００９】本発明の集束具付き光ファイバ束の一実施
形態の光ファイバ長手方向の断面図を図１に示す。集束
具２は円筒状の中空部を有し、その中空部には、少なく
とも端部において互いに融着されている複数本の光ファ
イバからなる光ファイバ束１の端部が挿入されている。
中空部の壁面には凹部３が形成されており、接着剤によ
り集束具２と光ファイバ束３が接着固定されている。こ
の凹部３内に接着剤が密に充填されることにより、少量
の接着剤であっても集束具と光ファイバ束を強固に固定
することができる。また、光ファイバ束と集束具との間
に剥離が生じた場合でも、光ファイバ束が凹部に充填さ
れた接着剤を介して凹部に係止されているため、光ファ
イバ束が集束具から引き抜けにくい。さらに、この集束
具付き光ファイバにおいては、主として凹部内に充填さ
れた接着剤により集束具と光ファイバ束を接着固定して
おり、光ファイバ束の端面近傍において光ファイバ束の
外周と集束具の中空部壁面がほぼ接しているので、光フ
ァイバ束端面において光ファイバ束と集束具との間に接
着剤がほとんど露出しない。従って、この集束具付き光
ファイバ束は、接着剤が光ファイバ束の光伝送性能に及
ぼす影響が小さいため光伝送性能に優れ、また、集束具
付き光ファイバ束の端面にしめる光入射部分の面積を大
きくすることができるため、集束具をコンパクトに形成
することができる。また、集束具付き光ファイバ束の端
面を光源装置に接続して用いた場合の光源からの熱によ
る接着剤の劣化がおきにくいため、耐久性にも優れてい
る。FIG. 1 is a cross-sectional view of an embodiment of the optical fiber bundle with a bundle of the present invention in the longitudinal direction of the optical fiber. The focusing device 2 has a cylindrical hollow portion into which the end of the optical fiber bundle 1 composed of a plurality of optical fibers fused at least at the ends is inserted.
A concave portion 3 is formed in the wall surface of the hollow portion, and the bundle 2 and the optical fiber bundle 3 are bonded and fixed by an adhesive. By tightly filling the concave portion 3 with the adhesive, the concentrator and the optical fiber bundle can be firmly fixed even with a small amount of adhesive. Further, even when the optical fiber bundle and the focusing device are separated from each other, the optical fiber bundle is pulled from the focusing device because the optical fiber bundle is locked in the concave portion through the adhesive filled in the concave portion. Hard to fall out. Further, in this optical fiber with a bundle, the bundle and the optical fiber bundle are bonded and fixed mainly by an adhesive filled in the concave portion, and the outer periphery of the bundle of optical fibers and the bundle of the bundle near the end face of the optical fiber bundle. Since the hollow portion wall surfaces are almost in contact with each other, almost no adhesive is exposed between the optical fiber bundle and the focusing device at the end surface of the optical fiber bundle. Therefore, the optical fiber bundle with the concentrator has excellent light transmission performance because the adhesive has a small effect on the optical transmission performance of the optical fiber bundle, and the area of the light incident portion to be the end face of the optical fiber bundle with the concentrator is small. Since the size can be increased, the focusing device can be formed compact. In addition, when the end face of the optical fiber bundle with the bundle is connected to the light source device, the adhesive is hardly deteriorated by heat from the light source, so that the durability is excellent.
【００１０】なお、本実施形態においては、光ファイバ
束と集束具を接着剤により接着固定しているが、光ファ
イバ束と集束具を融着固定することも可能である。この
場合は、光ファイバ束の材料が凹部中に密に充填される
ので、集束具と光ファイバ束を強固に固定することがで
きる。[0010] In the present embodiment, the optical fiber bundle and the convergence device are adhered and fixed with an adhesive, but the optical fiber bundle and the convergence device can be fused and fixed. In this case, since the material of the optical fiber bundle is densely filled in the concave portion, the focusing device and the optical fiber bundle can be firmly fixed.
【００１１】また、本実施形態においては中空部壁面に
凹部を形成しているが、凹部に代えて凸部を形成した
り、凹部及び凸部を形成することも可能である。In the present embodiment, the concave portion is formed on the wall surface of the hollow portion. However, a convex portion may be formed instead of the concave portion, or a concave portion and a convex portion may be formed.
【００１２】凹部や凸部の形状は特に限定されず、例え
ば中空部の周方向に連続的、断続的、もしくは部分的に
延在する溝状または畝状のもの、螺旋状のもの、凹部や
凸部を点在させたもの、梨地状のものなどとすることが
できる。中でも、中空部の周方向に延びる溝状の凹部を
複数本望けることが好ましい。凹部や凸部により集束具
と光ファイバ束との間に形成される空間に接着剤を十分
に充填し、光ファイバ束と集束具とを強固に固定するた
めには、凹部の深さや凸部の高さは０．２ｍｍ以上とす
ることが好ましく、凹部や凸部の中空部の壁面方向の幅
のうち最も短い幅を０．５ｍｍ以上とすることが好まし
い。凹部の深さ、凸部の高さ、凹部や凸部の幅の上限は
特に限定されないが、集束具を容易に製造するために
は、通常３ｍｍ以下とされる。The shape of the concave portion or the convex portion is not particularly limited. For example, the shape of a groove or a ridge extending continuously, intermittently or partially in the circumferential direction of the hollow portion, the spiral shape, the concave portion, It may be one in which projections are interspersed, one in a satin shape, or the like. In particular, it is preferable that a plurality of groove-shaped concave portions extending in the circumferential direction of the hollow portion can be desired. In order to sufficiently fill the space formed between the bundle and the optical fiber bundle by the concave and convex parts with the adhesive and to firmly fix the optical fiber bundle and the bundle, the depth of the concave part and the convex part Is preferably 0.2 mm or more, and the shortest width of the width of the hollow portion of the concave portion or the convex portion in the wall direction is preferably 0.5 mm or more. Although the upper limit of the depth of the concave portion, the height of the convex portion, and the width of the concave portion and the convex portion is not particularly limited, it is usually 3 mm or less in order to easily manufacture the focusing device.
【００１３】本発明の集束具の中空部の断面形状は、特
に限定されず、円形状のものであっても、四角形などの
多角形状であってもよい。また、光ファイバとしては、
プラスチックまたはガラスから構成される光ファイバで
あって光ファイバ相互が融着しうるものが使用される。
また、集束具の材料としては公知のものが用いられ、例
えば金属やプラスチックなどからなるものが用いられ
る。The cross-sectional shape of the hollow portion of the focusing device of the present invention is not particularly limited, and may be a circular shape or a polygonal shape such as a square. Also, as an optical fiber,
An optical fiber made of plastic or glass that can be fused to each other is used.
In addition, a known material is used as the material of the bunching device, and for example, a material made of metal, plastic, or the like is used.
【００１４】また、光ファイバ束の端部において複数本
の光ファイバを互いに融着させる方法としては公知の方
法が用いられ、例えば、公知の集束治具の中空部内に複
数本の光ファイバの端部を挿入し、集束治具と中空部に
挿入された光ファイバを加熱処理する方法が挙げられ
る。その際の加熱温度は、例えば光ファイバとしてプラ
スチック製のものを用いる場合、光ファイバを構成する
プラスチックの熱変形温度以上かつ溶融温度以下とする
ことが好ましい。A known method is used as a method for fusing a plurality of optical fibers to each other at the end of the optical fiber bundle. For example, the end of the plurality of optical fibers is placed in a hollow portion of a known focusing jig. A method of inserting a portion and heating the optical fiber inserted into the focusing jig and the hollow portion is exemplified. In the case where a plastic optical fiber is used, for example, the heating temperature at that time is preferably equal to or higher than the thermal deformation temperature of the plastic forming the optical fiber and equal to or lower than the melting temperature.
【００１５】[0015]
【実施例】以下実施例により本発明をより具体的に説明
する。The present invention will be described more specifically with reference to the following examples.
【００１６】（実施例１）直径０．５ｍｍの光ファイバ
４３０本よりなる光ファイバ５の一端を、直径１２ｍｍ
の略円形状に集束し、円筒形状の中空部を有する集束用
治具の中空部に挿入して加熱処理し、端部において光フ
ァイバ間が融着されてなる光ファイバ束を得た。この光
ファイバ束をアルミ製の円筒形状の集束具の円筒形状の
中空部に挿入し、光ファイバ束と集束具との間に接着剤
を充填して光ファイバ束と集束具を接着固定した。光フ
ァイバ束の端部が挿入される部分の集束具外径は１５ｍ
ｍ、中空部内径は１２ｍｍ、中空部の中心軸方向の集束
具の長さは５０ｍｍであった。集束具の中空部の内壁に
は、幅１ｍｍ、深さ０．３ｍｍの中空部の周方向に延び
る溝状の凹部が１ｍｍピッチで５本形成されていた。(Example 1) One end of an optical fiber 5 composed of 430 optical fibers having a diameter of 0.5 mm was connected to a 12 mm diameter optical fiber.
And a heat treatment was performed by inserting the bundle into a hollow portion of a focusing jig having a cylindrical hollow portion to obtain an optical fiber bundle in which the optical fibers were fused at the ends. This optical fiber bundle was inserted into the cylindrical hollow portion of an aluminum cylindrical focusing device, an adhesive was filled between the optical fiber bundle and the focusing device, and the optical fiber bundle and the focusing device were bonded and fixed. The outer diameter of the focusing device where the end of the optical fiber bundle is inserted is 15 m
m, the inner diameter of the hollow part was 12 mm, and the length of the bunching tool in the central axis direction of the hollow part was 50 mm. On the inner wall of the hollow portion of the focusing device, five groove-shaped concave portions extending in the circumferential direction of the hollow portion having a width of 1 mm and a depth of 0.3 mm were formed at a pitch of 1 mm.
【００１７】次いで、光ファイバ束端面を研磨して集束
具付き光ファイバ束を得た。Next, the end face of the optical fiber bundle was polished to obtain an optical fiber bundle with a bundle.
【００１８】得られた集束具付き光ファイバ束に光を入
射させたところ、光ファイバ束の伝送性能は良好であっ
た。また光ファイバ束と集束具の引抜強度を測定したと
ころ、凹部が形成されていない集束具を用いたことを除
いて上記と同様に製造された集束具付き光ファイバ束と
比べて約３倍引抜強度が向上した。なお、引抜強度は集
束具付き光ファイバ束の全長を３００ｍｍとし、大型テ
ンシロンを用い、引き抜き速度を５ｍ／ｍｉｎとして測
定した。When light was incident on the obtained optical fiber bundle with a bundle, the transmission performance of the optical fiber bundle was good. In addition, when the pull-out strength of the optical fiber bundle and the bundle was measured, the pull-out strength was about three times that of the optical fiber bundle with the bundle manufactured in the same manner as above except that the bundle having no concave portion was used. Strength improved. The pulling strength was measured by setting the total length of the optical fiber bundle with the concentrator to 300 mm, using a large tensilon, and setting the drawing speed to 5 m / min.
【００１９】[0019]
【発明の効果】本発明の集束具を用いた集束具付き光フ
ァイバ束は、光伝送性能や耐久性に優れ、光ファイバ束
と集束具が強固に固着されており、またコンパクトであ
る。According to the present invention, an optical fiber bundle provided with a convergence device using the convergence device of the present invention is excellent in light transmission performance and durability, and is compact because the optical fiber bundle and the convergence device are firmly fixed.
【図１】本発明の一実施形態による集束具付き光ファイ
バ束の断面図である。FIG. 1 is a cross-sectional view of an optical fiber bundle with a bundle according to an embodiment of the present invention.
１ 光ファイバ束 ２ 集束具 ３ 凹部 DESCRIPTION OF SYMBOLS 1 Optical fiber bundle 2 Focusing tool 3 Recess
フロントページの続き Ｆターム(参考） 2H036 JA04 KA02 KA03 QA12 QA18 QA19 QA23 QA29 2H046 AA02 AA08 AA42 AZ13 Continued on the front page F term (reference) 2H036 JA04 KA02 KA03 QA12 QA18 QA19 QA23 QA29 2H046 AA02 AA08 AA42 AZ13
Claims (2)
部及び凸部の少なくとも一方が形成されている光ファイ
バ集束具。1. An optical fiber concentrator having a cylindrical hollow portion, wherein at least one of a concave portion and a convex portion is formed on a wall surface of the hollow portion.
空部内に、少なくとも端部において互いに融着された複
数本の光ファイバからなる光ファイバ束の端部が挿入、
固定されてなる集束具付き光ファイバ束。2. An end portion of an optical fiber bundle comprising a plurality of optical fibers fused to each other at least at an end is inserted into the hollow portion of the optical fiber bundle according to claim 1.
An optical fiber bundle with a focusing tool fixed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000117023A JP2001305387A (en) | 2000-04-18 | 2000-04-18 | Optical fiber collecting device and optical fiber bundle with collecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000117023A JP2001305387A (en) | 2000-04-18 | 2000-04-18 | Optical fiber collecting device and optical fiber bundle with collecting device |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2009190206A Division JP2009271558A (en) | 2009-08-19 | 2009-08-19 | Optical fiber bundling fixture and optical fiber bundle with bundling fixture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2001305387A true JP2001305387A (en) | 2001-10-31 |
Family
ID=18628403
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000117023A Pending JP2001305387A (en) | 2000-04-18 | 2000-04-18 | Optical fiber collecting device and optical fiber bundle with collecting device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2001305387A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023169277A1 (en) * | 2022-03-11 | 2023-09-14 | 微创投资控股有限公司 | Optical fiber bundle fixation apparatus, laser catheter thereof, and optical fiber coupling system thereof |
-
2000
- 2000-04-18 JP JP2000117023A patent/JP2001305387A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023169277A1 (en) * | 2022-03-11 | 2023-09-14 | 微创投资控股有限公司 | Optical fiber bundle fixation apparatus, laser catheter thereof, and optical fiber coupling system thereof |
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