JP2003287651A - Coupling part for optics, optical fiber coupling part, and method for manufacturing optical element using the same - Google Patents
Coupling part for optics, optical fiber coupling part, and method for manufacturing optical element using the sameInfo
- Publication number
- JP2003287651A JP2003287651A JP2002091370A JP2002091370A JP2003287651A JP 2003287651 A JP2003287651 A JP 2003287651A JP 2002091370 A JP2002091370 A JP 2002091370A JP 2002091370 A JP2002091370 A JP 2002091370A JP 2003287651 A JP2003287651 A JP 2003287651A
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- Prior art keywords
- optical fiber
- optical
- component
- plc
- face
- 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.)
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- Optical Couplings Of Light Guides (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、光学部品と光ファ
イバの接続に用いられる接続部品及びそれを用いた光学
素子の製造方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a connecting part used for connecting an optical part and an optical fiber and a method for manufacturing an optical element using the connecting part.
【０００２】[0002]
【従来の技術】平面型光導波回路（ＰＬＣ：Planer Lig
htwave Circuit）に代表される光学部品に他の光学部品
からの信号光を入出力するためには、ＰＬＣと他の光学
部品を光ファイバで接続することが必要である。ＰＬＣ
の導波路と光ファイバとを接続する従来の方法を図１に
示す。１１は平面型光導波回路（ＰＬＣ）、１２は導波
路コア部、１３はやとい、１４はガラスキャピラリ、１
５は光ファイバ、１６は導波路基板を示す。ＰＬＣは導
波路基板１６の上部に信号光が伝搬する導波路コア部１
２を設けたものである。ＰＬＣの導波路コア部１２と光
ファイバ１５とを接続させるためには、中心に光ファイ
バ１５を挿入した円柱状のガラスキャピラリ１４が用い
られている。ガラスキャピラリは、量産化が可能で、か
つ内外径精度、偏芯精度が高く、低価格化には有利であ
る。このガラスキャピラリ１４を用いた光ファイバ１５
とＰＬＣの導波路コア部１２を接続する際には、接続強
度を高めるために、ＰＬＣ上面にやとい１３を設け、ガ
ラスキャピラリ１４との接続面積を大きくしている。ま
た、接続端面からの反射光が元の方向に戻らないように
するために、図１に示すように、ＰＬＣの接続端面とガ
ラスキャピラリの接続端面の両方とも、斜め８°に研磨
されている。2. Description of the Related Art Planar optical waveguide (PLC)
In order to input / output signal light from another optical component to / from an optical component represented by a htwave circuit, it is necessary to connect the PLC and the other optical component with an optical fiber. PLC
FIG. 1 shows a conventional method for connecting the waveguide and the optical fiber of FIG. 11 is a planar optical waveguide circuit (PLC), 12 is a waveguide core portion, 13 is fast, 14 is a glass capillary, 1
Reference numeral 5 is an optical fiber, and 16 is a waveguide substrate. The PLC is a waveguide core portion 1 through which signal light propagates above the waveguide substrate 16.
2 is provided. In order to connect the waveguide core 12 of the PLC and the optical fiber 15, a cylindrical glass capillary 14 with the optical fiber 15 inserted in the center is used. The glass capillaries can be mass-produced and have high accuracy of inner and outer diameters and eccentricity, which is advantageous for cost reduction. Optical fiber 15 using this glass capillary 14
When connecting the waveguide core portion 12 of the PLC to the PLC, a ridge 13 is provided on the upper surface of the PLC to increase the connection strength, and the connection area with the glass capillary 14 is increased. Further, in order to prevent the reflected light from the connection end face from returning to the original direction, both the connection end face of the PLC and the connection end face of the glass capillary are polished at an angle of 8 ° as shown in FIG. .
【０００３】ＰＬＣ等の光学部品にキャピラリを接続す
る際には、ガラスキャピラリ１４の中央付近にある貫通
孔に光ファイバ１５を挿入し、該光ファイバ１５をガラ
スキャピラリ１４に接着固定した後、光学部品に接続す
る端面を斜め研磨し、光学部品の導波路コア部と光ファ
イバのコア部を調心して一致させ、光学部品とガラスキ
ャピラリの接続端面を接着剤で固定する。When connecting a capillary to an optical component such as a PLC, an optical fiber 15 is inserted into a through hole in the vicinity of the center of the glass capillary 14, and the optical fiber 15 is adhered and fixed to the glass capillary 14 and then optical. The end face to be connected to the component is obliquely polished, the waveguide core of the optical component and the core of the optical fiber are aligned and aligned, and the connecting end face of the optical component and the glass capillary is fixed with an adhesive.
【０００４】端面が斜めに研磨されたＰＬＣ１１とガラ
スキャピラリ１４を接続する場合、ＰＬＣの導波路コア
部１２の光軸とガラスキャピラリ内の光ファイバ１４の
光軸との双方を一直線上に揃える必要がある。双方の光
軸が一直線上にない場合には光ファイバ１５がＰＬＣの
導波路コア部１２と曲がって取りつけられることにな
り、接続損失が大きくなる。光ファイバ１５の光軸に垂
直な面に対して８°の接続端面を形成している場合の斜
視図を図２に示す。図２において、ＰＬＣの導波路コア
部１２の光軸と光ファイバ１５の光軸を一直線上に揃え
るためには、ＰＬＣの接続端面の８２°の傾斜をなす方
向と直角な方向（図２において、導波路コア部の接続端
面の矢印方向）と、ガラスキャピラリ１４の斜め研磨さ
れた接続端面の短径方向（図２において、ガラスキャピ
ラリ１４の接続端面を背面から見た面の矢印方向Ａ）を
平行にするわけであるが、斜め研磨したガラスキャピラ
リでは研磨の斜め方向が判別しにくい。即ち、８°程度
の斜め研磨では、ガラスキャピラリの接続端面はほぼ円
形であり、また、光ファイバの光軸方向に対してもほぼ
垂直に近い角度であるため、目視はもちろんＣＣＤカメ
ラなどで拡大してもその斜め方向が精確に特定できず、
ＰＬＣの接続端面の傾斜と一致させて接続することは困
難であった。このときの調整方法を図３に示す。図３は
ガラスキャピラリの側から、平面型光導波回路（ＰＬ
Ｃ）を見た図である。図３に示すように、接続損失が最
小になるような位置を探りながら、ガラスキャピラリ１
４を図中の回転矢印のように、右回転や左回転をさせて
最適な角度で接続していた。When connecting the PLC 11 and the glass capillary 14 whose end faces are obliquely polished, it is necessary to align both the optical axis of the waveguide core portion 12 of the PLC and the optical axis of the optical fiber 14 in the glass capillary. There is. When both optical axes are not aligned, the optical fiber 15 is bent and attached to the waveguide core portion 12 of the PLC, resulting in a large connection loss. FIG. 2 shows a perspective view in the case where a connection end surface of 8 ° is formed with respect to a surface perpendicular to the optical axis of the optical fiber 15. In FIG. 2, in order to align the optical axis of the waveguide core portion 12 of the PLC and the optical axis of the optical fiber 15 on a straight line, a direction (in FIG. 2) perpendicular to the direction in which the PLC connection end face is inclined by 82 °. , The arrow direction of the connection end face of the waveguide core portion) and the minor axis direction of the obliquely polished connection end face of the glass capillary 14 (in FIG. 2, the arrow direction A of the surface of the connection end face of the glass capillary 14 as seen from the back). However, it is difficult to determine the oblique direction of polishing with a glass capillary that is obliquely polished. That is, in the oblique polishing of about 8 °, the connection end face of the glass capillary is almost circular, and the angle is almost vertical to the optical axis direction of the optical fiber. However, the diagonal direction cannot be specified accurately,
It has been difficult to connect the PLC while matching the inclination of the connection end surface. The adjusting method at this time is shown in FIG. FIG. 3 shows a planar optical waveguide circuit (PL) from the glass capillary side.
It is the figure which looked at C). As shown in FIG. 3, while searching for the position where the connection loss is minimized, the glass capillary 1
4 was rotated clockwise or counterclockwise as shown by the rotation arrow in the figure and connected at the optimum angle.
【０００５】また、例えば、ＰＡＮＤＡファイバと呼ば
れる偏波保存光ファイバをガラスキャピラリ内に挿入し
て、ＰＬＣと接続する場合にも同様の問題があった。図
４は、接続端面が斜め研磨されたＰＬＣと、ガラスキャ
ピラリ内に装着された偏波保存光ファイバをそれぞれ接
続端面側から見た様子を示している。図４において、平
面型光導波回路（ＰＬＣ）１１のＸとＹは導波路での導
波光の偏波が維持される２つの方向で、導波路基板１６
に平行又は垂直な方向である。光ファイバ１５のＸ’と
Ｙ’は偏波保存光ファイバの伝搬光の偏波が維持される
２つの方向で、応力付与部に平行又は垂直な方向であ
る。Further, for example, when a polarization-maintaining optical fiber called a PANDA fiber is inserted into a glass capillary and connected to a PLC, there is a similar problem. FIG. 4 shows a state in which the PLC having the connection end surface obliquely polished and the polarization-maintaining optical fiber mounted in the glass capillary are viewed from the connection end surface side, respectively. In FIG. 4, X and Y of the planar optical waveguide circuit (PLC) 11 are two directions in which the polarization of the guided light in the waveguide is maintained, and the waveguide substrate 16
Parallel to or perpendicular to. X ′ and Y ′ of the optical fiber 15 are two directions in which the polarization of the propagating light of the polarization maintaining optical fiber is maintained and are parallel to or perpendicular to the stress applying portion.
【０００６】図４に示すように、偏波保存光ファイバを
ＰＬＣに接続するには、双方の偏波方向をそろえ、か
つ、双方の斜め研磨する斜め方向も揃える必要がある。
従って、偏波保存光ファイバをガラスキャピラリに挿入
する場合は、斜め研磨の斜め方向は偏波保存光ファイバ
の偏波方向に一致させるか垂直にするかの必要が生じる
が、偏波保存光ファイバは外見上では偏波方向の見分け
ができないから、研磨作業に支障をきたす。As shown in FIG. 4, in order to connect a polarization-maintaining optical fiber to a PLC, it is necessary to align both polarization directions and also align both oblique polishing directions.
Therefore, when inserting a polarization-maintaining optical fiber into a glass capillary, it is necessary to make the oblique direction of oblique polishing match or be perpendicular to the polarization direction of the polarization-maintaining optical fiber. Since it is impossible to distinguish the polarization direction from the outside, it hinders the polishing work.
【０００７】[0007]
【発明が解決しようとする課題】前述したように、通常
のガラスキャピラリは高精度、低価格である点で光学用
接続部品として優れるものの、従来のガラスキャピラリ
は、円柱軸の外周回転角を区別するような用途への適用
には支障をきたすという問題があった。本発明は、この
ような問題を解決するために、円柱状のキャピラリに外
周回転角を区別できるような指標を設けることを目的と
する。As described above, the ordinary glass capillary is excellent as an optical connecting part in that it has high precision and low price, but the conventional glass capillary is distinguished from the outer peripheral rotation angle of the cylindrical axis. However, there is a problem in that it is difficult to apply to such uses. In order to solve such a problem, it is an object of the present invention to provide a column-shaped capillary with an index capable of distinguishing the outer peripheral rotation angle.
【０００８】[0008]
【課題を解決するための手段】前述した課題を解決する
ために、請求項１に係る発明では、円柱中心部に光ファ
イバの外径とほぼ等しい貫通孔を備える光学用接続部品
であって、該円柱の外周面に円柱軸と平行な平坦面を有
する光学用接続部品である。In order to solve the above-mentioned problems, the invention according to claim 1 is an optical connecting component having a through hole in the center of a cylinder, which has a through hole substantially equal to the outer diameter of the optical fiber. It is an optical connection component having a flat surface parallel to the cylinder axis on the outer peripheral surface of the cylinder.
【０００９】請求項２に係る発明では、請求項１におい
て、光学用接続部品は、ガラス、セラミックス、金属、
プラスチックス、又はこれらの複合体で構成されてい
る。According to a second aspect of the present invention, in the first aspect, the optical connecting component includes glass, ceramics, metal,
It is made of plastics or a composite of these.
【００１０】請求項３に係る発明では、請求項１又は２
に記載の光学用接続部品の前記貫通孔に光ファイバが挿
入され、接続端面側を光ファイバの光軸に対して傾斜さ
れた光ファイバ接続部品である。In the invention according to claim 3, claim 1 or 2
The optical fiber connecting component according to [1], in which an optical fiber is inserted into the through hole, and the connection end face side is inclined with respect to the optical axis of the optical fiber.
【００１１】請求項４に係る発明では、請求項３におい
て、傾斜された接続端面の短径方向が前記平坦部に平行
又は直角をなす光ファイバ接続部品である。According to a fourth aspect of the invention, there is provided the optical fiber connecting component according to the third aspect, wherein the short diameter direction of the inclined connecting end face is parallel or right angle to the flat portion.
【００１２】請求項５に係る発明では、請求項１又は２
に記載の光学用接続部品の前記貫通孔に偏波保存光ファ
イバが挿入された光ファイバ接続部品である。In the invention according to claim 5, claim 1 or 2
The optical fiber connecting part in which a polarization maintaining optical fiber is inserted into the through hole of the optical connecting part.
【００１３】請求項６に係る発明では、請求項５におい
て、該偏波保存光ファイバの偏波方向が平坦部に平行又
は直角をなす光ファイバ接続部品である。According to a sixth aspect of the invention, there is provided the optical fiber connecting component according to the fifth aspect, wherein the polarization direction of the polarization maintaining optical fiber is parallel or perpendicular to the flat portion.
【００１４】請求項７に係る発明は、光学部品と請求項
３乃至６に記載のいずれかの光ファイバ接続部品とを突
き合わせて光学素子を製造する方法であって、前記光学
部品と前記いずれかの光ファイバ接続部品とを平板上で
突き合わせるか、又は、前記光学部品と前記いずれかの
光ファイバ接続部品の一方と平板との間にスペーサ部品
を介在させて、前記光学部品と前記いずれかの光ファイ
バ接続部品とを前記平板上で突き合わせることによって
光学素子を製造する方法である。According to a seventh aspect of the present invention, there is provided a method of manufacturing an optical element by abutting an optical component and any one of the optical fiber connecting components according to the third to sixth aspects, the optical component and any one of the above. Or the optical fiber connecting component of the above is abutted on a flat plate, or a spacer component is interposed between one of the optical component and one of the optical fiber connecting components and the flat plate, and the optical component and the one of the above. Is a method for manufacturing an optical element by abutting the optical fiber connecting component (1) on the flat plate.
【００１５】本発明により、傾斜された光ファイバ接続
部品の接続端面の短径方向、又は偏波保存光ファイバが
挿入された光ファイバ接続部品の偏波保存光ファイバの
偏波方向を容易に把握することが可能になり、光学部品
と光ファイバ接続部品を接続する工程が簡略化される。
また、光学部品と光ファイバ接続部品の接続して光学素
子を製造することが容易になる。According to the present invention, the minor axis direction of the connection end face of the inclined optical fiber connecting component or the polarization direction of the polarization maintaining optical fiber of the optical fiber connecting component into which the polarization maintaining optical fiber is inserted can be easily grasped. And the process of connecting the optical component and the optical fiber connecting component is simplified.
Further, it becomes easy to manufacture the optical element by connecting the optical component and the optical fiber connecting component.
【００１６】[0016]
【発明の実施の形態】以下、本願発明の実施形態につい
て、添付の図面を参照して説明する。
（実施の形態１）本発明の実施の形態である光学用接続
部品の断面図を図５、斜視図を図６に示す。図５、図６
において、２１は平坦部、２２は貫通孔、２３はキャピ
ラリ本体部、２４は貫通孔２２の中心と平坦部２１の中
心点距離、２５は接続端面である。光学用接続部品の貫
通孔２２に光ファイバを挿入し、接続端面２５を光ファ
イバの光軸に垂直な面に対して８°をなす角度で研磨又
は切断して、光ファイバ接続部品を作製する。BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the accompanying drawings. (Embodiment 1) FIG. 5 is a sectional view and FIG. 6 is a perspective view of an optical connecting part according to an embodiment of the present invention. 5 and 6
In the above, reference numeral 21 is a flat portion, 22 is a through hole, 23 is a capillary main body portion, 24 is a distance between the center of the through hole 22 and the center point of the flat portion 21, and 25 is a connection end face. An optical fiber is inserted into the through hole 22 of the optical connecting part, and the connecting end face 25 is polished or cut at an angle of 8 ° with respect to a plane perpendicular to the optical axis of the optical fiber to manufacture an optical fiber connecting part. .
【００１７】光ファイバ接続部品の断面図を図７、斜視
図を図８に示す。図７、図８において、矢印方向Ａは、
斜め研磨した光ファイバ接続部品の接続端面２５の短径
方向を示す。光ファイバ接続部品はキャピラリ本体部２
３の外周には平坦部２１を有している。この平坦部は、
光ファイバの光軸と平行に設定される。また、矢印方向
Ａは平坦部２１と平行になるように、接続端面２５が斜
め研磨される。中心点距離２４は光ファイバコアの中心
から、平坦部２１までの距離を表す。FIG. 7 is a sectional view of the optical fiber connecting component and FIG. 8 is a perspective view thereof. 7 and 8, the arrow direction A is
The direction of the minor axis of the connecting end surface 25 of the optical fiber connecting component which is obliquely polished is shown. The optical fiber connecting part is the capillary body 2
The outer periphery of 3 has a flat portion 21. This flat part
It is set parallel to the optical axis of the optical fiber. Further, the connection end surface 25 is obliquely polished so that the arrow direction A is parallel to the flat portion 21. The center point distance 24 represents the distance from the center of the optical fiber core to the flat portion 21.
【００１８】前記の光ファイバ接続部品では接続端面２
５を研磨による傾斜面としたが、研磨以外の方法、例え
ばダイシングソーなどで切断による傾斜面であってもよ
い。特に、ダイシングソーで切断すると、研磨すること
に比較して経済的な方法であり、半導体加工に用いるよ
うな高精度の切断装置で切断することにより、面粗さを
小さくできる。従って、接続損失の増加、反射減衰量の
低下、接着強度の劣化の無い良好な接続端面を得ること
が出来る。傾斜した接続端面の形成は、図７の矢印方向
Ａと平坦部２１が平行になるようにキャピラリ本体部２
３を斜めに切断すればよい。In the above-mentioned optical fiber connecting part, the connecting end face 2
Although 5 is an inclined surface by polishing, it may be an inclined surface by cutting by a method other than polishing, for example, a dicing saw. In particular, cutting with a dicing saw is an economical method compared with polishing, and the surface roughness can be reduced by cutting with a highly accurate cutting device such as used for semiconductor processing. Therefore, it is possible to obtain a good connection end face without an increase in connection loss, a reduction in reflection attenuation, and a deterioration in adhesive strength. The inclined connecting end face is formed by setting the capillary main body portion 2 so that the flat portion 21 is parallel to the arrow direction A in FIG.
3 may be cut diagonally.
【００１９】この光ファイバ接続部品をＰＬＣに接続す
る場合には、平坦部２１とＰＬＣの基板底面が平行にな
るように設定する。光ファイバ接続部品をＰＬＣに接続
する場合の斜視図を図９、正面図を図１０に示す。図
９、図１０において、２７は基準平面、２８は光ファイ
バ接続部品である。When connecting the optical fiber connecting component to the PLC, the flat portion 21 and the bottom surface of the substrate of the PLC are set to be parallel to each other. FIG. 9 shows a perspective view and FIG. 10 shows a front view when the optical fiber connecting component is connected to the PLC. 9 and 10, 27 is a reference plane and 28 is an optical fiber connecting part.
【００２０】この設定には、図９に示すように、光ファ
イバ接続部品２８の平坦部２１と平面型光導波路回路
（ＰＬＣ）１１の導波路基板１６の底面を基準平面２７
に載置することによって実現可能である。具体的には、
光ファイバ接続部品とＰＬＣを接続する場合に用いる調
心接続装置のＰＬＣの搭載面や光ファイバ接続部品の搭
載面を基準平面として使用することができる。この基準
平面を利用すれば、図１０から分かるように、ＰＬＣの
導波路コア部１２の面方向と光ファイバ接続部品２８の
接続端面の短径方向を一致させることができるため、光
ファイバ接続部品２８を回転させることなく、導波路基
板１６の接続端面と光ファイバ接続部品２８の接続端面
を、密着させることができる。For this setting, as shown in FIG. 9, the flat portion 21 of the optical fiber connecting component 28 and the bottom surface of the waveguide substrate 16 of the planar optical waveguide circuit (PLC) 11 are set to the reference plane 27.
It can be realized by mounting on. In particular,
The mounting surface of the PLC of the aligning connection device used when connecting the optical fiber connecting component and the PLC or the mounting surface of the optical fiber connecting component can be used as a reference plane. If this reference plane is used, as can be seen from FIG. 10, the surface direction of the waveguide core portion 12 of the PLC and the minor axis direction of the connection end face of the optical fiber connecting component 28 can be made to coincide with each other. The connection end face of the waveguide substrate 16 and the connection end face of the optical fiber connection component 28 can be brought into close contact with each other without rotating 28.
【００２１】本発明の特徴である光ファイバ接続部品の
平坦部を利用して、光ファイバ接続部品とＰＬＣの接続
を容易にすることもできる。図７において、光ファイバ
のコア部中心から平坦部までの中心点距離２４を所定の
値になるように平坦部を設ければ、ＰＬＣとの接続を容
易にできる。例えば、図９において、中心点距離２４を
ＰＬＣの導波路基板１６の底面からの導波路コア部１２
の中心までの距離に等しく設定すれば、ＰＬＣ１１と光
ファイバ接続部品を基準平面２７に置いた状態で、両者
の光軸高さは一致することになる。さらに、ＰＬＣの導
波路コア部１２の光軸と平坦部２１の光ファイバに平行
な中心線を、基準平面２７への投影線で一致させれば、
ＰＬＣの導波路コア部１２と光ファイバ接続部品２８の
光ファイバの光軸を一致させることができる。即ち、外
形のみを基準としてＰＬＣの導波路コア部と光ファイバ
接続部品の光ファイバの光軸を一致させることができ
る。通常、ＰＬＣの導波路から光ファイバ接続部品の光
ファイバへと、又は逆に光ファイバ接続部品の光ファイ
バからＰＬＣの導波路へと、光を通過させて出力光をモ
ニタしながら高精度な光軸調整作業を行い、接続損失の
最小化を図るが、ここまでの作業で、すでに光軸は略一
致しており微細調整を残すのみとなるため、光軸調整作
業は短時間で終了する。By utilizing the flat portion of the optical fiber connecting component, which is a feature of the present invention, the connection between the optical fiber connecting component and the PLC can be facilitated. In FIG. 7, if the flat portion is provided so that the center point distance 24 from the center of the optical fiber to the flat portion becomes a predetermined value, the connection with the PLC can be facilitated. For example, in FIG. 9, the center point distance 24 is the waveguide core portion 12 from the bottom surface of the waveguide substrate 16 of the PLC.
If it is set equal to the distance to the center of the optical axis, the optical axis heights of the PLC 11 and the optical fiber connecting component will be the same when they are placed on the reference plane 27. Further, if the optical axis of the waveguide core portion 12 of the PLC and the center line parallel to the optical fiber of the flat portion 21 are matched with the projection line on the reference plane 27,
The optical axes of the waveguide core portion 12 of the PLC and the optical fiber of the optical fiber connecting component 28 can be matched. That is, the optical axis of the waveguide core of the PLC and the optical axis of the optical fiber of the optical fiber connecting component can be matched with each other based on only the outer shape. Normally, high-precision light is transmitted while monitoring the output light by allowing light to pass from the PLC waveguide to the optical fiber of the optical fiber connection component, or conversely from the optical fiber of the optical fiber connection component to the PLC waveguide. Although the axis adjustment work is performed to minimize the connection loss, the optical axis adjustment work is completed in a short time because the optical axes have already substantially coincided with each other and only fine adjustment is left by the work up to this point.
【００２２】本実施の形態では、光ファイバ接続部品の
平坦部は接続端面の短径方向に平行に設定したが、必ず
しもこの設定に限られるものではない。本発明では、光
ファイバ接続部品の平坦部と接続端面の短径方向の相対
位置関係が予め規定されていれば十分で、平坦部２１は
光ファイバ１５の光軸と平行であれば、ガラスキャピラ
リの外周部のどこにあってもよく、その位置は目的に応
じて適宜設定することが可能である。たとえば、光ファ
イバ接続部品の平坦部を接続端面の短径方向と直角にな
るような位置でもよく、また、キャピラリ本体の外周面
に沿って図７の平坦部２１と１８０°ずらした位置に設
定してもよい。In this embodiment, the flat portion of the optical fiber connecting component is set parallel to the minor axis direction of the connecting end face, but the setting is not necessarily limited to this. In the present invention, it suffices that the relative positional relationship between the flat portion of the optical fiber connecting component and the connecting end face in the minor axis direction is defined in advance, and if the flat portion 21 is parallel to the optical axis of the optical fiber 15, the glass capillary is provided. It may be located anywhere on the outer peripheral portion, and its position can be appropriately set according to the purpose. For example, the flat portion of the optical fiber connecting component may be positioned at a right angle to the minor axis direction of the connecting end surface, or may be set at a position shifted by 180 ° from the flat portion 21 of FIG. 7 along the outer peripheral surface of the capillary body. You may.
【００２３】上記実施の形態において、キャピラリ本体
の材質はガラス、金属、セラミックス、プラスチックス
を用いることが出来る。また、これらの複合体からなっ
ていてもよい。In the above embodiment, glass, metal, ceramics or plastics can be used as the material of the capillary body. Moreover, it may consist of these composites.
【００２４】（実施の形態２）図１１は、図５の光学用
接続部品の貫通孔に偏波保存光ファイバの一種であるＰ
ＡＮＤＡファイバを挿入した光ファイバ接続部品の接続
端面の正面図である。本実施の形態では、平坦部２１に
よって、ＰＡＮＤＡファイバの偏波方向を規定するもの
であり、図１１（ａ）はＰＡＮＤＡファイバの応力付与
方向が平坦部に対して平行とし、また、図１１（ｂ）で
は応力付与方向が平坦部に対して垂直としたものであ
る。本実施の形態ではＰＡＮＤＡファイバが挿入された
光ファイバ接続部品における平坦部は、少なくとも偏波
方向を規定するように作用するため、接続端面２５を傾
斜させない場合であっても、平坦部を設けることは有効
である。さらに、接続端面２５を傾斜させるには、図１
１（ａ）の場合には傾斜端面２５の短径方向（図７、図
８の方向Ａ）を応力付与方向と平行に、図１１（ｂ）の
場合には傾斜端面２５の短径方向（図７、図８の方向
Ａ）を応力付与方向と垂直な方向に設定することとな
る。(Embodiment 2) FIG. 11 shows a type of polarization-maintaining optical fiber P in the through hole of the optical connecting component of FIG.
It is a front view of the connection end surface of the optical fiber connection part which inserted the ANDA fiber. In the present embodiment, the flat portion 21 defines the polarization direction of the PANDA fiber. In FIG. 11A, the stress application direction of the PANDA fiber is parallel to the flat portion, and FIG. In b), the stress applying direction is perpendicular to the flat portion. In the present embodiment, since the flat portion in the optical fiber connection component in which the PANDA fiber is inserted acts to at least define the polarization direction, the flat portion should be provided even when the connection end face 25 is not inclined. Is valid. Furthermore, in order to incline the connection end face 25, the
In the case of 1 (a), the minor axis direction of the inclined end surface 25 (direction A in FIGS. 7 and 8) is parallel to the stress applying direction, and in the case of FIG. 11 (b), the minor axis direction of the inclined end surface 25 ( The direction A) in FIGS. 7 and 8 is set to the direction perpendicular to the stress applying direction.
【００２５】本実施の形態では、ＰＡＮＤＡファイバが
挿入された光ファイバ接続部品を用いて、該光ファイバ
接続部品の平坦部とＰＬＣの導波路基板とを基準平面に
一致させる図９の方法を適用すれば、ＰＬＣとＰＡＮＤ
Ａファイバとの間で偏波方向と光軸を同時に一致させる
ことができる。In this embodiment, the method shown in FIG. 9 is used in which the flat portion of the optical fiber connecting component and the waveguide substrate of the PLC are aligned with the reference plane by using the optical fiber connecting component in which the PANDA fiber is inserted. PLC and PAND
The polarization direction and the optical axis can be simultaneously matched with the A fiber.
【００２６】なお、接続端面を傾斜させた光ファイバ接
続部品を作製するには、図５の貫通孔２２に接着剤とと
もにＰＡＮＤＡファイバを挿入し、該貫通孔内でＰＡＮ
ＤＡファイバを回転させて偏波方向と平坦部２１を平行
とし、又は垂直とし、その後、接着剤を硬化させる。さ
らに、平坦面の位置によって、接続端面２５の傾斜方向
を設定した上で、接続端面２５を斜めに研磨又は切断す
ればよい。In order to fabricate an optical fiber connecting component having a slanted connecting end face, a PANDA fiber is inserted into the through hole 22 of FIG. 5 together with an adhesive, and the PAN is inserted in the through hole.
The DA fiber is rotated so that the polarization direction and the flat portion 21 are parallel or vertical, and then the adhesive is cured. Further, the inclination direction of the connection end face 25 may be set according to the position of the flat surface, and then the connection end face 25 may be obliquely polished or cut.
【００２７】本実施の形態では、偏波保存光ファイバを
挿入した光ファイバ接続部品において、光学用接続部品
に設けた平坦部を利用して、偏波保存光ファイバの偏波
方向を無調整で平面型光導波回路（ＰＬＣ）の偏波方向
と一致させることができた。In the present embodiment, in the optical fiber connecting component in which the polarization maintaining optical fiber is inserted, the flat portion provided in the optical connecting component is used to adjust the polarization direction of the polarization maintaining optical fiber without adjustment. It was possible to match the polarization direction of the planar optical waveguide circuit (PLC).
【００２８】（実施の形態３）実施の形態１の図５で
は、本発明の光ファイバ接続部品の平坦部と光学部品と
してのＰＬＣの導波路基板の底面が基準平面２７上に載
置して、光ファイバ接続部品の光ファイバのコア部とＰ
ＬＣの導波路コア部の高さが一致する場合を示したが、
高さが一致しない場合には、光ファイバ接続部品又は光
学部品と基準平面との間にスペーサ部品を介在させる。(Third Embodiment) In FIG. 5 of the first embodiment, the flat portion of the optical fiber connecting component of the present invention and the bottom surface of the waveguide substrate of the PLC as the optical component are placed on the reference plane 27. , The core portion of the optical fiber of the optical fiber connecting part and P
Although the case where the heights of the waveguide cores of the LC are the same is shown,
If the heights do not match, a spacer component is interposed between the optical fiber connecting component or optical component and the reference plane.
【００２９】図１２は、光ファイバ接続部品２８と基準
平面の間にコの字型のスペーサ部品３０を介在させた例
である。これらのスペーサ部品を介在させることによ
り、同一基準平面上で、光学部品の導波路コア部の高さ
と光ファイバ接続部品の光ファイバのコア部の高さが等
しいのと同じになり、実施の形態１と同等の効果を得る
ことが出来る。コの字型スペーサ部品４１の代わりに、
単なる平行平板をスペーサ部品としても同様の効果を得
ることが出来る。FIG. 12 shows an example in which a U-shaped spacer component 30 is interposed between the optical fiber connecting component 28 and the reference plane. By interposing these spacer parts, the height of the waveguide core part of the optical part and the height of the core part of the optical fiber of the optical fiber connecting part are the same on the same reference plane. The same effect as 1 can be obtained. Instead of the U-shaped spacer component 41,
Similar effects can be obtained even if a simple parallel plate is used as a spacer component.
【００３０】[0030]
【発明の効果】以上説明したように、本発明によれば、
傾斜された接続端面の短径方向を容易に把握することが
可能になり、光学部品と光ファイバ接続部品を接続する
工程が簡略化される。また、偏波保存光ファイバを光学
用接続部品に挿入した光ファイバ接続部品では、偏波保
存光ファイバの偏波方向を容易に把握できるため、偏波
方向の規定された光学部品と光ファイバ接続部品を接続
する工程が簡略化される。As described above, according to the present invention,
It becomes possible to easily grasp the minor axis direction of the inclined connection end face, and the process of connecting the optical component and the optical fiber connection component is simplified. In addition, since the polarization direction of the polarization-maintaining optical fiber can be easily grasped in the optical fiber connection part in which the polarization-maintaining optical fiber is inserted into the optical connection part, the optical part and the optical fiber connection with the specified polarization direction can be connected. The process of connecting the parts is simplified.
【図１】ＰＬＣの導波路と光ファイバとを接続する従来
の方法を説明する図である。FIG. 1 is a diagram illustrating a conventional method of connecting a waveguide of a PLC and an optical fiber.
【図２】光軸に垂直な面に対して８°の接続端面を形成
している場合の光学部品とキャピラリを接続する従来の
方法を説明する図である。FIG. 2 is a diagram illustrating a conventional method for connecting an optical component and a capillary when a connection end face of 8 ° is formed with respect to a surface perpendicular to the optical axis.
【図３】光軸に垂直な面に対して８°の接続端面を形成
している場合の光学部品とキャピラリを接続する従来の
方法を説明する図である。FIG. 3 is a diagram illustrating a conventional method of connecting an optical component and a capillary when a connection end surface of 8 ° is formed with respect to a surface perpendicular to the optical axis.
【図４】偏波保存光ファイバをＰＬＣに接続する従来の
方法を説明する図である。FIG. 4 is a diagram illustrating a conventional method of connecting a polarization maintaining optical fiber to a PLC.
【図５】本発明の実施の形態である光学用接続部品の断
面図である。FIG. 5 is a cross-sectional view of an optical connecting component according to an embodiment of the present invention.
【図６】本発明の実施の形態である光学用接続部品の斜
視図である。FIG. 6 is a perspective view of an optical connection component according to an embodiment of the present invention.
【図７】本発明の実施の形態である光ファイバ接続部品
の断面図である。FIG. 7 is a cross-sectional view of an optical fiber connection component according to an embodiment of the present invention.
【図８】本発明の実施の形態である光ファイバ接続部品
の斜視図である。FIG. 8 is a perspective view of an optical fiber connection component according to an embodiment of the present invention.
【図９】本発明の実施の形態である光ファイバ接続部品
を光学部品に接続する場合の斜視図である。FIG. 9 is a perspective view showing a case where the optical fiber connecting component according to the embodiment of the present invention is connected to an optical component.
【図１０】本発明の実施の形態である光ファイバ接続部
品を光学部品に接続する場合の正面図である。FIG. 10 is a front view of the case where the optical fiber connection component according to the embodiment of the present invention is connected to the optical component.
【図１１】本発明の実施の形態である光学用接続部品の
貫通孔に偏波保存光ファイバの一種であるＰＡＮＤＡフ
ァイバを挿入した光ファイバ接続部品の接続端面の正面
図である。FIG. 11 is a front view of a connection end face of an optical fiber connection component in which a PANDA fiber, which is a kind of polarization maintaining optical fiber, is inserted into a through hole of the optical connection component according to the embodiment of the present invention.
【図１２】光ファイバ接続部品と基準平面の間にコの字
型のスペーサ部品を介在させた本発明の実施の形態であ
る。FIG. 12 is an embodiment of the present invention in which a U-shaped spacer component is interposed between the optical fiber connecting component and the reference plane.
１１：平面型光導波回路（ＰＬＣ） １２：導波路コア部 １３：やとい １４：ガラスキャピラリ １５：光ファイバ １６：導波路基板 ２１：平坦部 ２２：貫通孔 ２３：キャピラリ本体部 ２４：中心点距離 ２５：接続端面 ２６：光ファイバ端面 ２７：基準平面 ２８：光ファイバ接続部品 ２９：ＰＡＮＤＡファイバ ３０：スペーサ部品 11: Planar optical waveguide circuit (PLC) 12: Waveguide core part 13: Yaoi 14: Glass capillary 15: Optical fiber 16: Waveguide substrate 21: Flat part 22: Through hole 23: Capillary body 24: Center point distance 25: Connection end face 26: Optical fiber end face 27: reference plane 28: Optical fiber connection part 29: PANDA fiber 30: Spacer parts
───────────────────────────────────────────────────── フロントページの続き Ｆターム(参考） 2H036 JA03 LA07 NA01 2H037 AA01 BA24 BA31 CA10 CA34 DA04 DA06 DA16 ─────────────────────────────────────────────────── ─── Continued front page F-term (reference) 2H036 JA03 LA07 NA01 2H037 AA01 BA24 BA31 CA10 CA34 DA04 DA06 DA16
Claims (7)
しい貫通孔を備える光学用接続部品であって、該円柱の
外周面に円柱軸と平行な平坦面を有することを特徴とす
る光学用接続部品。1. An optical connecting part having a through hole in the center of a cylinder, the through hole being approximately equal to the outer diameter of the optical fiber, wherein the outer peripheral surface of the cylinder has a flat surface parallel to the cylinder axis. Connection parts.
ックス、又はこれらの複合体で構成されていることを特
徴とする請求項１に記載の光学用接続部品。2. The optical connecting part according to claim 1, which is made of glass, ceramics, metal, plastics, or a composite thereof.
の前記貫通孔に光ファイバが挿入され、接続端面側を光
ファイバの光軸に対して傾斜された光ファイバ接続部
品。3. An optical fiber connecting part in which an optical fiber is inserted into the through hole of the optical connecting part according to claim 1 and the connecting end face side is inclined with respect to the optical axis of the optical fiber.
の短径方向が前記平坦部に平行又は直角をなすことを特
徴とする光ファイバ接続部品。4. The optical fiber connecting component according to claim 3, wherein the minor axis direction of the inclined connecting end face is parallel or perpendicular to the flat portion.
の前記貫通孔に偏波保存光ファイバが挿入された光ファ
イバ接続部品。5. An optical fiber connecting part in which a polarization maintaining optical fiber is inserted into the through hole of the optical connecting part according to claim 1 or 2.
バの偏波方向が平坦部に平行又は直角をなすことを特徴
とする光ファイバ接続部品。6. The optical fiber connecting component according to claim 5, wherein the polarization direction of the polarization-maintaining optical fiber is parallel or perpendicular to the flat portion.
れかの光ファイバ接続部品とを突き合わせる光学素子の
製造方法であって、前記光学部品と前記いずれかの光フ
ァイバ接続部品とを平板上で突き合わせるか、又は、前
記光学部品と前記いずれかの光ファイバ接続部品の一方
と平板との間にスペーサ部品を介在させて、前記光学部
品と前記いずれかの光ファイバ接続部品とを前記平板上
で突き合わせることを特徴とする光学素子の製造方法。7. A method of manufacturing an optical element for abutting an optical component and any one of the optical fiber connecting parts according to claim 3 to 6, wherein the optical component and any one of the optical fiber connecting parts are joined together. Butt on a flat plate, or by interposing a spacer component between one of the optical component and one of the optical fiber connecting components and the flat plate, the optical component and the optical fiber connecting component A method for manufacturing an optical element, which comprises butting on the flat plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002091370A JP2003287651A (en) | 2002-03-28 | 2002-03-28 | Coupling part for optics, optical fiber coupling part, and method for manufacturing optical element using the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002091370A JP2003287651A (en) | 2002-03-28 | 2002-03-28 | Coupling part for optics, optical fiber coupling part, and method for manufacturing optical element using the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JP2003287651A true JP2003287651A (en) | 2003-10-10 |
Family
ID=29236468
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002091370A Pending JP2003287651A (en) | 2002-03-28 | 2002-03-28 | Coupling part for optics, optical fiber coupling part, and method for manufacturing optical element using the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2003287651A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7621673B2 (en) | 2006-02-08 | 2009-11-24 | Nippon Electric Glass Co., Ltd. | Capillary tube for holding optical fiber |
| JP2015068892A (en) * | 2013-09-27 | 2015-04-13 | 株式会社中原光電子研究所 | Optical connection component |
| JP2019066727A (en) * | 2017-10-03 | 2019-04-25 | Tdk株式会社 | Optical fiber holding tool |
-
2002
- 2002-03-28 JP JP2002091370A patent/JP2003287651A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7621673B2 (en) | 2006-02-08 | 2009-11-24 | Nippon Electric Glass Co., Ltd. | Capillary tube for holding optical fiber |
| JP2015068892A (en) * | 2013-09-27 | 2015-04-13 | 株式会社中原光電子研究所 | Optical connection component |
| JP2019066727A (en) * | 2017-10-03 | 2019-04-25 | Tdk株式会社 | Optical fiber holding tool |
| JP7087329B2 (en) | 2017-10-03 | 2022-06-21 | Tdk株式会社 | Fiber optic holder |
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