JPS63231406A - Method for connecting optical fiber - Google Patents
Method for connecting optical fiberInfo
- Publication number
- JPS63231406A JPS63231406A JP6416887A JP6416887A JPS63231406A JP S63231406 A JPS63231406 A JP S63231406A JP 6416887 A JP6416887 A JP 6416887A JP 6416887 A JP6416887 A JP 6416887A JP S63231406 A JPS63231406 A JP S63231406A
- Authority
- JP
- Japan
- Prior art keywords
- fiber
- small piece
- optical fiber
- guide
- connection
- 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
- 239000013307 optical fiber Substances 0.000 title claims abstract description 36
- 238000000034 method Methods 0.000 title claims description 34
- 239000000835 fiber Substances 0.000 claims abstract description 39
- 239000000758 substrate Substances 0.000 claims abstract description 16
- 239000000853 adhesive Substances 0.000 claims abstract description 15
- 230000003287 optical effect Effects 0.000 claims description 21
- 230000001070 adhesive effect Effects 0.000 claims description 13
- 239000011148 porous material Substances 0.000 claims description 11
- 238000005304 joining Methods 0.000 abstract description 9
- 239000000463 material Substances 0.000 abstract description 5
- 230000003247 decreasing effect Effects 0.000 abstract 2
- 239000010979 ruby Substances 0.000 description 4
- 229910001750 ruby Inorganic materials 0.000 description 4
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 3
- 238000005253 cladding Methods 0.000 description 3
- 239000011521 glass Substances 0.000 description 3
- 239000010410 layer Substances 0.000 description 3
- 229910052710 silicon Inorganic materials 0.000 description 3
- 239000010703 silicon Substances 0.000 description 3
- 239000012790 adhesive layer Substances 0.000 description 2
- 238000004891 communication Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- GQYHUHYESMUTHG-UHFFFAOYSA-N lithium niobate Chemical compound [Li+].[O-][Nb](=O)=O GQYHUHYESMUTHG-UHFFFAOYSA-N 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 229920006332 epoxy adhesive Polymers 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 229910052594 sapphire Inorganic materials 0.000 description 1
- 239000010980 sapphire Substances 0.000 description 1
- 229910052719 titanium Inorganic materials 0.000 description 1
- 239000010936 titanium Substances 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
- G02B6/4212—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms the intermediate optical element being a coupling medium interposed therebetween, e.g. epoxy resin, refractive index matching material, index grease, matching liquid or gel
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/26—Optical coupling means
- G02B6/30—Optical coupling means for use between fibre and thin-film device
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/38—Mechanical coupling means having fibre to fibre mating means
- G02B6/3801—Permanent connections, i.e. wherein fibres are kept aligned by mechanical means
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/3628—Mechanical coupling means for mounting fibres to supporting carriers
- G02B6/3632—Mechanical coupling means for mounting fibres to supporting carriers characterised by the cross-sectional shape of the mechanical coupling means
- G02B6/3636—Mechanical coupling means for mounting fibres to supporting carriers characterised by the cross-sectional shape of the mechanical coupling means the mechanical coupling means being grooves
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/36—Mechanical coupling means
- G02B6/3628—Mechanical coupling means for mounting fibres to supporting carriers
- G02B6/3632—Mechanical coupling means for mounting fibres to supporting carriers characterised by the cross-sectional shape of the mechanical coupling means
- G02B6/3644—Mechanical coupling means for mounting fibres to supporting carriers characterised by the cross-sectional shape of the mechanical coupling means the coupling means being through-holes or wall apertures
-
- G—PHYSICS
- G02—OPTICS
- G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
- G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
- G02B6/24—Coupling light guides
- G02B6/42—Coupling light guides with opto-electronic elements
- G02B6/4201—Packages, e.g. shape, construction, internal or external details
- G02B6/4204—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms
- G02B6/4207—Packages, e.g. shape, construction, internal or external details the coupling comprising intermediate optical elements, e.g. lenses, holograms with optical elements reducing the sensitivity to optical feedback
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Couplings Of Light Guides (AREA)
Abstract
Description
【発明の詳細な説明】
〔概 要〕
光導波路に光ファイバを接続するに当って、光ファイバ
の真線の先端部を嵌合固着せる小片を介して両者の接続
を行う、この接続方法によれば、モジュフル損失の低減
をはかるとともに、少ない工数で容易かつ正確に光ファ
イバの接続を行うことができる。[Detailed Description of the Invention] [Summary] When connecting an optical fiber to an optical waveguide, this connection method involves connecting the two through a small piece that fits and secures the true tip of the optical fiber. According to the present invention, it is possible to reduce the modulus loss and to connect optical fibers easily and accurately with less man-hours.
本発明は光ファイバの接続方法に間する。本発明は、さ
らに詳しく述べると、光導波路に光ファイバの真線を接
続する方法に関する。本発明にょる接続方法は、例えば
、光通信や光を用いたセンサなどの分野において有利に
使用することができる。The present invention relates to a method for connecting optical fibers. More specifically, the present invention relates to a method of connecting a true optical fiber to an optical waveguide. The connection method according to the present invention can be advantageously used, for example, in fields such as optical communication and sensors using light.
光通信技術の発展とともに、光回路素子の小型化、一体
形成、量産性などが求められている。同様な要望は、光
を用いたセンサなどの分野においてもあり、また、これ
らの要望に見合ったデバイス形態として、光導波路が提
案されている。ところで、光導波路を回路素子として用
いる場合、それと光ファイバとの接続が問題となってく
る。なぜなら、両者の大きさの違いという問題に加えて
、光ファイバ、特にその真線（コアとそれをとり囲むク
ラッド層）は、周知の通り、極めて細く、また、ガラス
などのような繊維材料からなるために機械的強度が十分
でないので、取り扱いに入念な注意が必要であり、さら
に、極めて低損失な接続を達成するため、軸ずれ、角度
ずれ、端面分離等の不都合を回避した形で接続を行わな
ければならないからである。With the development of optical communication technology, there is a need for optical circuit elements to be smaller, integrally formed, and mass-producible. Similar demands exist in the field of sensors using light, and optical waveguides have been proposed as a device form that meets these demands. By the way, when using an optical waveguide as a circuit element, the connection between it and an optical fiber becomes a problem. This is because, in addition to the problem of the difference in size between the two, optical fibers, especially their true fibers (core and surrounding cladding layer), are, as is well known, extremely thin and made of fiber materials such as glass. Since the mechanical strength is not sufficient for the purpose of the connection, careful handling is required.Furthermore, in order to achieve an extremely low loss connection, the connection is made in a way that avoids problems such as axis misalignment, angular misalignment, and end face separation. This is because it must be done.
従来、光導波路に光ファイバを接続するに当って、光導
波路の端面に光ファイバの先端を直接に接合する方法が
とられている。この接続方法は、例えば、シリコン基板
のＶ形の溝に光ファイバを収容して上からガラス板等で
押さえ付け、先端を切断することによって行われている
。先端を切断した光ファイバは、その切断面を十分に研
磨した後、微動台などを使用して導波路の端面に位置合
わせし、接着剤で固定することができる。Conventionally, when connecting an optical fiber to an optical waveguide, a method has been used in which the tip of the optical fiber is directly joined to the end face of the optical waveguide. This connection method is carried out, for example, by accommodating an optical fiber in a V-shaped groove of a silicon substrate, pressing it down with a glass plate or the like from above, and cutting off the tip. After the cut surface of the optical fiber whose tip has been cut is sufficiently polished, it can be aligned with the end face of the waveguide using a fine movement table or the like, and fixed with an adhesive.
従来の光ファイバの接続方法は、例えば第６図に示され
るように、導波路基ｖｉ１の端面に光ファイバの真線２
を接合することからなっている。光ファイバは、図示の
通り、シリコン基板Ｉ５の■溝に、押え板１６を使用し
てはさみ込まれている。In the conventional optical fiber connection method, for example, as shown in FIG.
It consists of joining. As shown in the figure, the optical fiber is held in the groove of the silicon substrate I5 using a holding plate 16.
導波路基板１は、例えばニオブ酸リチウム（ＬｉＮｂＯ
：＋）等の電気光学結晶からなる基板に例えばチタンの
熱拡散による光導波路（図示せず）を形成したものであ
る。この接続方法は、しかし、接続に要する工数が多い
、微細位置合わせが必要で、導波路端面とシリコンＶ溝
に挾まれたファイバの端面が僅かに、たとえば１°傾い
ても導波路とファイバは数十μｍはなれてしまい、損失
が大きい。また、導波路端面やＶ溝端面が１°傾いて研
磨された場合には、導波路とファイバはｌ°傾いた状態
で接続されるため、曲がり損失が発生して損失が増大す
る。The waveguide substrate 1 is made of, for example, lithium niobate (LiNbO
An optical waveguide (not shown) formed by thermal diffusion of titanium, for example, is formed on a substrate made of electro-optic crystal such as :+). However, this connection method requires many man-hours for connection and requires fine alignment. Even if the end face of the waveguide and the end face of the fiber sandwiched between the silicon V-grooves are tilted slightly, for example by 1°, the waveguide and the fiber will not work. They are separated by several tens of micrometers, resulting in a large loss. Furthermore, if the waveguide end face or the V-groove end face is polished at an angle of 1°, the waveguide and the fiber are connected at an angle of 1°, resulting in bending loss and increased loss.
上記の接続方法の問題を回避するため、第７図に示され
るような接続方法も用いられている。この方法は、ファ
イバの真線２を接着剤１２に埋めた形で基板１に接続し
ようとするもので、より大きな接合強度を得ることがで
きる。しかし、この改良方法の場合、接着剤を多量に使
用するため、何らかの理由で環境温度が上昇した場合、
接着剤の膨張の結果として、ファイバの軸ずれや導波路
からの離反といった新たな問題が発生する。この技術分
野では、したがって、上記したような問題を伴なわない
改良された光ファイバの接続方法を提供することが望ま
れている。In order to avoid the problems of the above connection method, a connection method as shown in FIG. 7 is also used. This method attempts to connect the true fiber 2 to the substrate 1 by burying it in the adhesive 12, and can obtain greater bonding strength. However, this improved method uses a large amount of adhesive, so if the environmental temperature rises for some reason,
As a result of adhesive expansion, new problems arise, such as fiber misalignment and separation from the waveguide. There is therefore a desire in the art to provide an improved optical fiber splicing method that does not suffer from the problems described above.
上記した問題点は、本発明によれば、光導波路に光ファ
イバを接続するに当って、光ファイバの真線の先端部を
嵌合同着せる小片を介して両者の接続を行うことを特徴
とする光ファイバの接続方法によって解決することがで
きる。The above-mentioned problem is solved according to the present invention, in which, when connecting an optical fiber to an optical waveguide, the two are connected through a small piece that fits and attaches the tip of the true optical fiber. This problem can be solved by the method of connecting optical fibers.
本発明では、従来のように光導波路と光ファイバをただ
突き合わせて接合するのではなくて、光ファイバと小片
の接合、そして小片と光導波路基板端面の接合という２
つの接合形態の組み合わせによって、上述のような従来
の技術の問題点を解決することができる。本発明の光フ
ァイバの接続は、好ましくは、小片に穿たれた細孔に光
ファイバの真線の先端部を嵌め込んで接着剤で固定する
とともに、光導波路基板の端面と前記小片との接合も接
着剤で行う。また、ここで、好ましくは、前記小片の接
合面積は前記光導波路基板の端面の面積よりも小である
。In the present invention, instead of simply butting and joining an optical waveguide and an optical fiber as in the past, the present invention involves the joining of an optical fiber and a small piece, and the joining of a small piece and an end face of an optical waveguide substrate.
By combining the two joining forms, the problems of the prior art as described above can be solved. The connection of the optical fiber of the present invention is preferably carried out by fitting the true end of the optical fiber into a hole bored in a small piece and fixing it with an adhesive, and at the same time joining the end face of the optical waveguide substrate and the small piece. Also done with adhesive. Further, here, preferably, the bonding area of the small piece is smaller than the area of the end face of the optical waveguide substrate.
本発明において接続媒体として使用する小片は、上記し
た接合のメカニズムに適合したものならば何であっても
よい。特に基板との接合の面からニオブ酸リチウムが最
適であるというものの、その他の材料、例えばルビー、
セラミック、サファイアガラスなどでも遜色のない結果
を得ることができる。小片の細孔は、それに嵌め込まれ
るべき光ファイバの真線のサイズに応じて、また、接着
剤の介在も考慮して、任意に径を変更することができる
。The piece used as a connecting medium in the present invention may be any piece that is compatible with the joining mechanism described above. Although lithium niobate is said to be optimal from the viewpoint of bonding with the substrate, other materials such as ruby,
Comparable results can be obtained with ceramics, sapphire glass, etc. The diameter of the pores in the small piece can be arbitrarily changed depending on the true size of the optical fiber to be fitted therein, and also taking into consideration the presence of an adhesive.
また、ファイバ真線を小片から僅かに突出させた構造で
導波路と接続することにより、小片と導波路端面が傾い
ていてもファイバと導波路は充分接近でき、また導波路
端面が導波路に対して垂直でなく傾いて研摩されていた
場合にも、ファイバ側を傾けて接続する事が可能であり
、接続損失を低減できる。In addition, by connecting the fiber to the waveguide with a structure in which the true fiber slightly protrudes from the small piece, the fiber and waveguide can be sufficiently approached even if the small piece and the end face of the waveguide are tilted, and the end face of the waveguide is connected to the waveguide. On the other hand, even if the fiber is polished not perpendicularly but at an angle, it is possible to connect the fiber side with the fiber side tilted, and connection loss can be reduced.
さらに、小片に穿たれた細孔の太さをできるだけファイ
バの直径に近付けることにより、単に小片の細孔にファ
イバを嵌め込むだけで小片をファイバに対して垂直に形
成できる。例えば、長さ５００μｍの細孔で孔の太さが
ファイバの直径より４μｍ太い場合には小片面の傾きは
０．５°以下にできる。Furthermore, by making the diameter of the pore bored in the small piece as close as possible to the diameter of the fiber, the small piece can be formed perpendicular to the fiber simply by fitting the fiber into the pore of the small piece. For example, if a pore has a length of 500 μm and the diameter of the hole is 4 μm thicker than the diameter of the fiber, the inclination of one side can be 0.5° or less.
本発明では、かなり小型の小片を接合媒体として使用す
るにもかかわらず、ファイバの真線と小片の接合、そし
て小片と導波路基板の接合が組み合わさる結果として、
予想外に大きな接合強度を達成することができる。その
際、ファイバを小片から僅かに突出して形成することに
より、ファイバを傾けても小片と導波路端面ばぶつから
ず、角度合わせも可能であり、また小片が小型軽量であ
るので、ファイバ真線に負担がかかることはなく、いわ
ば真線自体が小片を保持可能であり、ファイバ単独での
位置合わせと同等に精密なｘ、ｙ、ｚ軸及び角度調整が
可能である。In the present invention, although a fairly small piece is used as a bonding medium, as a result of the combination of bonding between the true fiber and the piece and between the piece and the waveguide substrate,
Unexpectedly large bond strengths can be achieved. At that time, by forming the fiber to slightly protrude from the small piece, even if the fiber is tilted, the small piece and the end face of the waveguide will not collide, and the angle can be adjusted.Also, since the small piece is small and lightweight, the fiber can be aligned with the true wire. There is no burden, the true wire itself can hold the small piece, so to speak, and precise x, y, z axis and angular adjustment is possible, equivalent to alignment with the fiber alone.
本発明による導波路へのファイバの接続は、例えば、第
１図に図示されるようにして行うことができる。導波路
基板１の光導波路（図示せず）に、矩形の小片３を介し
てファイバの真線２を接合することができる。Connection of a fiber to a waveguide according to the invention can be performed, for example, as illustrated in FIG. A true fiber 2 can be bonded to an optical waveguide (not shown) of a waveguide substrate 1 via a rectangular piece 3 .
第１図の接続方法を判り易く説明すると、第４図のよう
になる。なお、本図では、説明を容易にするため、部分
的に拡大するなどして作図しである。図示される通り、
小片３は、その細孔に光ファイバの真線２ （ビニール
等の外被８を剥離したもので、コア６及びクラッド層７
からなる）が嵌め込まれていて、接着剤１０によって強
固に結合せしめられている。接着剤１０による接合は、
より強固な結合力を得るため、加熱融着によることが推
奨される。また、小片３は、接着剤層９を介して導波路
基Ｖｉ１の端面に接合されており、その際、光導波路１
１の端面とファイバ真線２の先端とは小片３が小型軽量
であるために正確に位置合わせされている。位置合わせ
が正しく行なわれているため、本接続方法のモジュール
損失はほとんど０である。また、本発明では、この技術
分野において一般的に用いられている接着剤、例えば紫
外線硬化型エポキシ系接着剤などを接合目的に使用する
ことができる。The connection method shown in FIG. 1 will be explained in an easy-to-understand manner as shown in FIG. 4. Note that in this figure, some parts are enlarged for ease of explanation. As shown,
The small piece 3 is a true optical fiber 2 (with the outer sheath 8 of vinyl etc. peeled off, and the core 6 and the cladding layer 7 are inserted into the pore).
) are fitted and firmly bonded by adhesive 10. The bonding using the adhesive 10 is as follows:
In order to obtain stronger bonding strength, heat fusing is recommended. Further, the small piece 3 is bonded to the end surface of the waveguide base Vi1 via the adhesive layer 9, and at this time, the small piece 3
The end face of the fiber 1 and the tip of the straight fiber 2 are precisely aligned because the small piece 3 is small and lightweight. Since the alignment is performed correctly, the module loss of this connection method is almost zero. Furthermore, in the present invention, adhesives commonly used in this technical field, such as ultraviolet curable epoxy adhesives, can be used for bonding purposes.
小片３とファイバ真線２の接合強度をさらに向上せしめ
たい場合には、小片の厚さを増加させることによって達
成することができる。具体的には、例えば第４図に示す
ように、小片３と同じ形状の小片３′を二連で用いるか
（場合によってはそれよりも多く）、さもなければ、所
望の厚さをもった小片を１個だけ用いることによって、
達成することができる。If it is desired to further improve the bonding strength between the piece 3 and the true fiber 2, this can be achieved by increasing the thickness of the piece. Specifically, for example, as shown in FIG. By using only one small piece,
can be achieved.
本発明によるファイバ接続方法では、第３図に示される
ような形状をもった小片もまた有利に使用することがで
きる。図示の小片１３は、ルビーリングであって、細孔
４と、凹部５とを存する。Pieces having the shape shown in FIG. 3 can also be used advantageously in the fiber splicing method according to the invention. The illustrated small piece 13 is a ruby ring, and has a pore 4 and a recess 5.
凹部５は、ファイバ真線を細孔４に嵌入するに際してガ
イドとして働き、非常に都合が良い。また、このルビー
リングは、ファイバ真線の径に対して±１μｍ以下の精
度で細孔を加工でき、その加工も容易かつ安価に可能で
ある。必要に応じて、例えば直径１．２鰭、厚さ４００
μｍ及び細孔径１３０μｍを有する時計用ルビー軸受け
もこれに応用することができる。第３図の小片１３を使
用した接続例を示したものが、第２図の斜視図である。The recess 5 serves as a guide when the fiber is inserted into the pore 4, and is very convenient. Further, in this ruby ring, pores can be formed with an accuracy of ±1 μm or less with respect to the diameter of the true fiber, and the process can be performed easily and inexpensively. If necessary, for example, diameter 1.2 fin, thickness 400
Ruby bearings for watches with a pore diameter of 130 μm can also be applied here. The perspective view of FIG. 2 shows an example of connection using the small piece 13 of FIG. 3.
また、第２図の接続方法の変形例として、第５図を示す
ことができる。図示の接続方法の場合、ファイバの真線
２を小片１３から僅かに突出させた状態で、接着剤１２
にて光導波路１１の端面に接続している。Further, as a modification of the connection method shown in FIG. 2, FIG. 5 can be shown. In the case of the illustrated connection method, with the true fiber 2 slightly protruding from the small piece 13,
It is connected to the end face of the optical waveguide 11 at.
本発明によれば、従来の導波路とファイバの接続方法に
比較して、モジュール損失を低減することができ、また
、接合強度の向上、工数の低減、加工コスト、部材コス
ト等の低下などをはかることができる。According to the present invention, module loss can be reduced compared to conventional waveguide and fiber connection methods, and it is possible to improve bonding strength, reduce man-hours, reduce processing costs, material costs, etc. It can be measured.
第１図は、本発明による接続方法の一例を示した斜視図
、
第２図は、本発明による接続方法のもう１つの例を示し
た斜視図、
第３図は、第２図の方法で用いられる小片の斜視図、
第４図は、本発明による接続方法をより詳細に説明した
断面図、
第５図は、本発明による接続方法のもう１つの例を示し
た断面図、
そして
第６図及び第７図は、それぞれ、従来の接続方法を示し
た斜視図である。
図中、ｌは導波路基板、２はファイバ真線、３及び１３
は小片、４は細孔、６はコア、７はクラッド層、８は外
被、そして９及び１０は接着剤層である。
本発明による接続例
第１図
本発明による接続例
第２図
＃４３図 １１°°゛４導ゝ路本発明による接
続例
第５図FIG. 1 is a perspective view showing an example of the connection method according to the present invention, FIG. 2 is a perspective view showing another example of the connection method according to the invention, and FIG. 3 is a perspective view showing an example of the connection method according to the invention. 4 is a sectional view illustrating the connection method according to the present invention in more detail; FIG. 5 is a sectional view showing another example of the connection method according to the present invention; and 6. 7 and 7 are perspective views showing conventional connection methods, respectively. In the figure, l is a waveguide substrate, 2 is a straight fiber, 3 and 13
4 is a small piece, 4 is a pore, 6 is a core, 7 is a cladding layer, 8 is an outer cover, and 9 and 10 are adhesive layers. Connection example according to the present invention Figure 1 Connection example according to the present invention Figure 2 Figure #43 11°°゛4 conductor Connection example according to the present invention Figure 5
Claims (1)
イバの真線の先端部を嵌合固着せる小片を介して両者の
接続を行うことを特徴とする光ファイバの接続方法。 ２、前記小片に穿たれた細孔に前記光ファイバの真線の
先端部を嵌め込んで接着剤で固定するとともに、前記光
導波路基板の端面と前記小片との接合も接着剤で行う、
特許請求の範囲第１項に記載の接続方法。 ３、光ファイバが前記小片より僅かに突出た状態で保持
され、光導波路基板端面と光ファイバがこの小片を介し
て接着剤で接合されている、特許請求の範囲第１項に記
載の接続方法。 ４、前記小片の接合面積は前記光導波路基板の端面の面
積よりも小である、特許請求の範囲第１項〜第３項のい
ずれか１項に記載の接続方法。 ５、前記小片に穿たれた細孔は光ファイバの真線の太さ
より僅かに太く、隙間の片寄りによって生ずるファイバ
と真線の傾きは２°以下である、特許請求の範囲第１項
に記載の接続方法。 ６、前記小片は充分に軽く、ファイバーの真線だけで保
持できる、特許請求の範囲第１項に記載の接続方法。[Claims] 1. An optical fiber characterized in that when connecting an optical fiber to an optical waveguide, the connection is made between the two through a small piece that fits and fixes the true tip of the optical fiber. Connection method. 2. Inserting the true tip of the optical fiber into the hole drilled in the small piece and fixing it with an adhesive, and also bonding the end face of the optical waveguide substrate and the small piece with an adhesive;
A connection method according to claim 1. 3. The connection method according to claim 1, wherein the optical fiber is held in a state slightly protruding from the small piece, and the end face of the optical waveguide substrate and the optical fiber are bonded with an adhesive via the small piece. . 4. The connection method according to any one of claims 1 to 3, wherein the bonding area of the small piece is smaller than the area of the end surface of the optical waveguide substrate. 5. The pore drilled in the small piece is slightly thicker than the true wire of the optical fiber, and the inclination between the fiber and the true wire caused by the deviation of the gap is 2° or less, Connection method described. 6. The connection method according to claim 1, wherein the small piece is sufficiently light and can be held only by a straight fiber.
Priority Applications (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6416887A JPS63231406A (en) | 1987-03-20 | 1987-03-20 | Method for connecting optical fiber |
| CA000561753A CA1309240C (en) | 1987-03-20 | 1988-03-17 | Method of connecting optical fibers |
| EP88302387A EP0283301B1 (en) | 1987-03-20 | 1988-03-18 | Connecting optical fibers |
| DE8888302387T DE3877597T2 (en) | 1987-03-20 | 1988-03-18 | CONNECTION OF OPTICAL FIBERS. |
| US07/170,320 US4948219A (en) | 1987-03-20 | 1988-03-18 | Method of connecting optical fibers and connection aids and fiber holders employed therewith, and optical waveguide modules employing same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6416887A JPS63231406A (en) | 1987-03-20 | 1987-03-20 | Method for connecting optical fiber |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63231406A true JPS63231406A (en) | 1988-09-27 |
| JPH0571922B2 JPH0571922B2 (en) | 1993-10-08 |
Family
ID=13250263
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP6416887A Granted JPS63231406A (en) | 1987-03-20 | 1987-03-20 | Method for connecting optical fiber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS63231406A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02113212A (en) * | 1988-10-24 | 1990-04-25 | Hitachi Cable Ltd | Waveguide type optical module |
| US4976506A (en) * | 1989-02-13 | 1990-12-11 | Pavlath George A | Methods for rugged attachment of fibers to integrated optics chips and product thereof |
| JPH04110807A (en) * | 1990-08-31 | 1992-04-13 | Nec Corp | Waveguide type optical device |
| US5146522A (en) * | 1989-02-13 | 1992-09-08 | Litton Systems, Inc. | Methods for rugged attachment of fibers to integrated optics chips and product thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5740911U (en) * | 1980-08-20 | 1982-03-05 | ||
| JPS5858513A (en) * | 1981-10-03 | 1983-04-07 | Nippon Telegr & Teleph Corp <Ntt> | Fixing method for optical fiber |
| JPS6151107A (en) * | 1984-08-21 | 1986-03-13 | Toshiba Corp | Optical fiber coupler |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5462178A (en) * | 1978-02-14 | 1979-05-18 | Hitachi Zosen Corp | Fused salt cell for water |
-
1987
- 1987-03-20 JP JP6416887A patent/JPS63231406A/en active Granted
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5740911U (en) * | 1980-08-20 | 1982-03-05 | ||
| JPS5858513A (en) * | 1981-10-03 | 1983-04-07 | Nippon Telegr & Teleph Corp <Ntt> | Fixing method for optical fiber |
| JPS6151107A (en) * | 1984-08-21 | 1986-03-13 | Toshiba Corp | Optical fiber coupler |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH02113212A (en) * | 1988-10-24 | 1990-04-25 | Hitachi Cable Ltd | Waveguide type optical module |
| US4976506A (en) * | 1989-02-13 | 1990-12-11 | Pavlath George A | Methods for rugged attachment of fibers to integrated optics chips and product thereof |
| JPH04502672A (en) * | 1989-02-13 | 1992-05-14 | リトン システムズ，インコーポレーテッド | A method for attaching a fiber to an integrated optical chip with good durability and products using the method |
| US5146522A (en) * | 1989-02-13 | 1992-09-08 | Litton Systems, Inc. | Methods for rugged attachment of fibers to integrated optics chips and product thereof |
| JPH04110807A (en) * | 1990-08-31 | 1992-04-13 | Nec Corp | Waveguide type optical device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0571922B2 (en) | 1993-10-08 |
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