JP2019078969A - Optical fiber holding fixture - Google Patents

Optical fiber holding fixture Download PDF

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JP2019078969A
JP2019078969A JP2017207820A JP2017207820A JP2019078969A JP 2019078969 A JP2019078969 A JP 2019078969A JP 2017207820 A JP2017207820 A JP 2017207820A JP 2017207820 A JP2017207820 A JP 2017207820A JP 2019078969 A JP2019078969 A JP 2019078969A
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optical fiber
holding member
holding
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optical
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JP6904213B2 (en
Inventor
原　裕貴
Hirotaka Hara
裕貴 原
新海　正博
Masahiro Shinkai
正博 新海
菊川　隆
Takashi Kikukawa
隆 菊川
正美 佐々木
Masami Sasaki
正美 佐々木
亮平 福▲崎▼
Ryohei Fukuzaki
亮平 福▲崎▼
基博 中原
Motohiro Nakahara
基博 中原
哲雄 宮
Tetsuo Miya
哲雄 宮
修司 田地
Shuji Taji
修司 田地
有島　功一
Koichi Arishima
功一 有島
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TDK Corp
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TDK Corp
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Priority to JP2017207820A priority Critical patent/JP6904213B2/en
Priority to US16/497,001 priority patent/US10921522B2/en
Priority to CN201880021188.4A priority patent/CN110770618B/en
Priority to PCT/JP2018/005969 priority patent/WO2018186037A1/en
Priority to TW107111613A priority patent/TWI664459B/en
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Abstract

To make it possible to control a bending radius of an optical fiber without upsizing a component for fixing the optical fiber.SOLUTION: An optical fiber holding fixture of the present disclosure comprises: a holding member (23) in which an end part of an optical fiber (26) is arranged on one end thereof and the optical fiber (26) is arranged on the other end so as to extend; and a second holding member (24) for holding the optical fiber (26) between the first holding member (23) and itself. The first holding member (23) and the second holding member (24) include on the one ends thereof an optical fiber holding section (27) for holding the optical fiber (26) therebetween, and the first holding member (23) includes on the other end a curved section (23E) which curves at a predetermined curvature radius along an extension direction of the optical fiber (26). A recess (31) is disposed on at least one of a first plane (23D) provided on the first holding member (23) and a second plane (24D) provided on the second holding member (24).SELECTED DRAWING: Figure 11

Description

本開示は、光ファイバが保持されている光ファイバ保持具に関する。   The present disclosure relates to an optical fiber holder in which an optical fiber is held.

光通信分野においてＳｉ−Ｐは従来のものと比較し小型、低コスト、低消費電力であり、Ｄａｔａｃｏｍ分野での活躍が期待されている。Ｓｉを使用することで光導波路の小型化が実現可能であり、また光／電子回路を同一基板上に積層できるため、さらに小型化が可能となるためである。   In the optical communication field, Si-P is smaller in size, lower in cost and lower in power consumption than conventional ones, and is expected to be active in the Datacom field. The use of Si makes it possible to miniaturize the optical waveguide and to stack the optical / electronic circuit on the same substrate, thereby further miniaturizing the optical waveguide.

シリコン導波路と光ファイバの接続方法の一つが表面結合（グレーティングカップリング）である。表面結合は導波路面に格子形状を形成し、光の干渉により上方に光線を導き、導波路面に接続した光ファイバに入光させる。または、光ファイバから光を導波路へと入光させる。   One of the connection methods of a silicon waveguide and an optical fiber is surface coupling (grating coupling). The surface coupling forms a grating shape on the waveguide, guides the light beam upward by the interference of light, and enters the optical fiber connected to the waveguide. Alternatively, light is made to enter the waveguide from the optical fiber.

表面結合の長所としてはスポット径が９μｍ程度となるため通常の光ファイバを使用し接続させることができる点である。   The advantage of surface bonding is that the spot diameter is about 9 μm, and a common optical fiber can be used and connected.

特開２０１６−０７１０２５号公報JP, 2016-071025, A ＷＯ２０１７−０２２０２６号公報WO 2017-022026

表面結合のデメリットとして、光ファイバ保持具がシリコン導波路上を突き出た形状となるため実装を考えると低背が好ましい。低背や小型化を図るには、光ファイバの曲げ加工が必要である。この問題の解決策として特許文献１の方法で挙げられる課題が、この方法では曲げ半径の制御ができないという課題が存在する。また、特許文献２は、光ファイバを保持している部品を回転させるための装置が必要であり、光ファイバのＲ曲げ部分が光ファイバ保持具の外側となるため大型になるという課題が存在する。   As a disadvantage of surface bonding, since the optical fiber holder has a shape protruding from the silicon waveguide, a low height is preferable in view of mounting. In order to achieve low height and miniaturization, it is necessary to bend the optical fiber. There is a problem that the method of Patent Document 1 can be cited as a solution to this problem, but there is a problem that the bending radius can not be controlled by this method. In addition, Patent Document 2 requires a device for rotating a component holding an optical fiber, and there is a problem that the R-bent portion of the optical fiber becomes large because it becomes the outside of the optical fiber holder. .

そこで、本開示は、光ファイバを固定している部品を大型化せずに曲げ半径の制御を可能にすることを目的とする。   Therefore, the present disclosure is directed to enabling control of a bending radius without increasing the size of a component fixing an optical fiber.

本開示の光ファイバ保持具は、
一端に光ファイバの端部が配置され、他端において前記光ファイバが延在するように配置される第１の保持部材と、
前記第１の保持部材と共に前記光ファイバを挟持する第２の保持部材と、
を備え、
前記第１の保持部材及び前記第２の保持部材は、前記光ファイバの素線を挟持する光ファイバ保持部を前記一端に備え、
前記第１の保持部材の前記他端は、前記光ファイバの延在方向に沿った予め定められた曲率半径で湾曲する湾曲部を備え、
前記光ファイバ保持部と前記湾曲部を接続する、前記第１の保持部材に備わる第１の平面、或いは前記光ファイバを挟んで前記第１の平面と対峙する、前記第２の保持部材に備わる第２の平面、の少なくともいずれか一方に、凹部が設けられている。 The optical fiber holder of the present disclosure is
A first holding member having an end of an optical fiber disposed at one end and the optical fiber extending at the other end;
A second holding member for holding the optical fiber together with the first holding member;
Equipped with
The first holding member and the second holding member have an optical fiber holding portion for holding the strands of the optical fiber at the one end,
The other end of the first holding member includes a curved portion that curves at a predetermined radius of curvature along the extension direction of the optical fiber,
A first plane provided to the first holding member, which connects the optical fiber holding portion and the curved portion, or a second holding member that faces the first plane with the optical fiber interposed therebetween A recess is provided in at least one of the second planes.

本開示によれば、光ファイバを固定している部品を大型化せずに曲げ半径の制御を可能にすることができる。   According to the present disclosure, it is possible to enable control of a bending radius without upsizing a part fixing an optical fiber.

第１の実施形態の光ファイバ保持具の光回路への接続例である。It is an example of a connection to the optical circuit of the optical fiber holder of 1st Embodiment. 第１の実施形態の光ファイバ保持具の第１の形態例を示す側面図及び断面図である。It is a side view and a sectional view showing the 1st example of a form of an optical fiber holding tool of a 1st embodiment. 第１の実施形態の光ファイバ保持具の第２の形態例を示す側面図及び断面図である。It is a side view and a sectional view showing the example of the 2nd form of the optical fiber holder of a 1st embodiment. 第１の実施形態の光ファイバ保持具の第３の形態例を示す側面図及び断面図である。It is a side view and a sectional view showing a 3rd example of a form of an optical fiber holding tool of a 1st embodiment. 押圧面が湾曲している第１の実施形態の光ファイバ保持具の形態例である。It is a form example of the optical fiber holder of 1st Embodiment in which the press surface is curving. 第２の実施形態の光ファイバ保持具の第１の形態例である。It is a 1st example of a form of an optical fiber holding tool of a 2nd embodiment. 第２の実施形態の光ファイバ保持具の第２の形態例である。It is a 2nd example of a form of the optical fiber holder of a 2nd embodiment. 第２の実施形態の光ファイバ保持具の第３の形態例である。It is a 3rd form example of the optical fiber holder of 2nd Embodiment. 第３の実施形態の光ファイバ保持具の光回路への接続例である。It is an example of a connection to the optical circuit of the optical fiber holder of 3rd Embodiment. 第３の実施形態の光ファイバ保持具の第１の形態例を示す側面図及び断面図である。It is a side view and a sectional view showing the 1st example of a form of an optical fiber holder of a 3rd embodiment. 第３の実施形態の光ファイバ保持具の第２の形態例を示す側面図及び断面図である。It is a side view and a sectional view showing the example of the 2nd form of the optical fiber holder of a 3rd embodiment. 第４の実施形態の光ファイバ保持具の光回路への第１の接続例である。It is an example of 1st connection to the optical circuit of the optical fiber holder of 4th Embodiment. 第４の実施形態の光ファイバ保持具の光回路への第２の接続例である。It is a 2nd connection example to the optical circuit of the optical fiber holder of 4th Embodiment.

以下、本開示の実施形態について、図面を参照しながら詳細に説明する。なお、本開示は、以下に示す実施形態に限定されるものではない。これらの実施の例は例示に過ぎず、本開示は当業者の知識に基づいて種々の変更、改良を施した形態で実施することができる。なお、本明細書及び図面において符号が同じ構成要素は、相互に同一のものを示すものとする。   Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. Note that the present disclosure is not limited to the embodiments described below. These implementation examples are merely illustrative, and the present disclosure can be implemented in various modifications and improvements based on the knowledge of those skilled in the art. In the present specification and drawings, components having the same reference numerals denote the same components.

（第１の実施形態）
図１に、本実施形態に係る光ファイバ保持具の一例を示す。本実施形態に係る光ファイバ保持具は、光ファイバ２６を挟持する２つの保持部材２３、２４と、スペーサ２１と、を備える。保持部材２３は、光ファイバ２６の延在する方向Ｄ１に配置され、第１の保持部材として機能する。保持部材２４は第２の保持部材として機能する。 First Embodiment
FIG. 1 shows an example of the optical fiber holder according to the present embodiment. The optical fiber holder according to the present embodiment includes two holding members 23 and 24 for holding the optical fiber 26, and a spacer 21. The holding member 23 is disposed in the extending direction D1 of the optical fiber 26, and functions as a first holding member. The holding member 24 functions as a second holding member.

本開示は、保持部材２３の一端である端面２３Ａと保持部材２４の一端である端面２４Ａに挟まれる形で光ファイバ２６の端面２６Ａが配置され、保持部材２３の他端である端面２３Ｂに光ファイバ２６が湾曲して延在する。例えば、図１のように、光ファイバ２６の端面２６Ａが光回路３の上面３Ａに接続される場合、光ファイバ２６の方向Ｄ１は光回路３の上面３Ａに沿った方向となる。ここで、方向Ｄ１は、一例として上面３Ａに平行方向な方向が例示できるが、本開示はこれに限らず、上面３Ａに垂直な方向を除く任意の方向とすることができる。また光回路３は、例えば、光導波路や光カプラを備えるフォトニック光回路（以下光回路と称す）である。   In the present disclosure, the end face 26A of the optical fiber 26 is disposed so as to be sandwiched between the end face 23A which is one end of the holding member 23 and the end face 24A which is one end of the holding member 24. The fiber 26 is curved and extends. For example, as shown in FIG. 1, when the end face 26A of the optical fiber 26 is connected to the upper surface 3A of the optical circuit 3, the direction D1 of the optical fiber 26 is the direction along the upper surface 3A of the optical circuit 3. Here, although the direction D1 can be exemplified as a direction parallel to the upper surface 3A as an example, the present disclosure is not limited thereto, and can be any direction except the direction perpendicular to the upper surface 3A. The optical circuit 3 is, for example, a photonic optical circuit (hereinafter referred to as an optical circuit) including an optical waveguide and an optical coupler.

保持部材２３の端面２３Ａは、光回路３の上面３Ａに接合されている。接合は紫外線硬化樹脂等の光硬化樹脂を用いることが好ましい。保持部材２３の端面２３Ａと保持部材２４の一端である端面２４Ａとが同一面上に配置され、光回路３の上面３Ａに接合されることが好ましい。光回路３の上面３Ａとの接合面積が大きくなるため、接合強度を補強することができる。保持部材２４は、光ファイバ２６および光ファイバ２６を固定した保持部材２３と共に端面研磨されてもよい。   The end face 23 A of the holding member 23 is joined to the upper surface 3 A of the optical circuit 3. It is preferable to use a light curing resin such as an ultraviolet curing resin for bonding. It is preferable that the end face 23A of the holding member 23 and the end face 24A which is one end of the holding member 24 be disposed on the same plane and be joined to the upper surface 3A of the optical circuit 3. Since the bonding area with the upper surface 3A of the optical circuit 3 is increased, the bonding strength can be reinforced. The holding member 24 may be end-polished with the optical fiber 26 and the holding member 23 to which the optical fiber 26 is fixed.

光ファイバ２６の端面２６Ａでの光軸と保持部材２３の端面２３Ａとのなす角度αは、９０°ではないことが好ましく、これにより端面２６Ａでの反射による減衰を防ぐことができる。また、角度αは、光回路３からの光入出射方向に合わせた角度であることが好ましい。   The angle α between the optical axis at the end face 26A of the optical fiber 26 and the end face 23A of the holding member 23 is preferably not 90 °, whereby attenuation due to reflection at the end face 26A can be prevented. Further, it is preferable that the angle α be an angle aligned with the light incident / emitting direction from the optical circuit 3.

保持部材２３及び２４は、Ｖ溝を用いた保持部材であり、保持部材２３及び２４の少なくともいずれかにＶ溝が形成されている。例えば、図２に示すように保持部材２３のみにＶ溝が形成されていてもよいし、図３に示すように保持部材２４のみにＶ溝が形成されていてもよいし、図４に示すように保持部材２３及び２４の両方にＶ溝が形成されていてもよい。光ファイバ２６のうちの保持部材２３及び２４のＶ溝で挟持される部分は被覆２６Ｂが除去された素線２６Ｃとなっている。保持部材２３にＶ溝が形成される場合、素線２６Ｃを保持する部分のみにＶ溝が形成されていてもよいが、湾曲部２３ＥにもＶ溝が形成されていてもよい。   The holding members 23 and 24 are holding members using V grooves, and at least one of the holding members 23 and 24 is formed with a V groove. For example, the V groove may be formed only in the holding member 23 as shown in FIG. 2, or the V groove may be formed only in the holding member 24 as shown in FIG. As described above, V grooves may be formed in both of the holding members 23 and 24. The portion of the optical fiber 26 held by the V-grooves of the holding members 23 and 24 is a strand 26C from which the coating 26B is removed. When the V-shaped groove is formed in the holding member 23, the V-shaped groove may be formed only in the portion holding the wire 26C, but the V-shaped groove may also be formed in the curved portion 23E.

保持部材２３及び２４の挟持する光ファイバの本数は、任意の数とすることができる。例えば、図２（ａ）、図３（ａ）及び図４（ａ）に記載のように１本であってもよいし、図２（ｂ）、図３（ｂ）及び図４（ｂ）に記載のように４本であってもよい。保持部材２３及び２４の挟持する光ファイバの本数が複数本の場合、本開示の光ファイバ保持具は、ファイバアレイを構成することができる。   The number of optical fibers held by the holding members 23 and 24 can be any number. For example, as shown in FIG. 2 (a), FIG. 3 (a) and FIG. 4 (a), it may be one, or FIG. 2 (b), FIG. 3 (b) and FIG. There may be four as described in. When the number of optical fibers held by the holding members 23 and 24 is plural, the optical fiber holder of the present disclosure can constitute a fiber array.

保持部材２３は、光ファイバ２６の方向Ｄ１に沿った予め定められた曲率半径で湾曲する湾曲部２３Ｅを備える。予め定められた曲率半径は、光ファイバ２６が過剰に曲がって折れることを防止することの可能な値であり、且つ光回路３の上面３Ａに沿った方向へ引き出すことが可能な値である。光ファイバ２６は湾曲部２３Ｅに接着剤により固定されていることが好ましい。   The holding member 23 includes a bending portion 23E that curves at a predetermined radius of curvature along the direction D1 of the optical fiber 26. The predetermined radius of curvature is a value capable of preventing the optical fiber 26 from being bent excessively and broken, and is a value capable of being pulled out in the direction along the upper surface 3 A of the optical circuit 3. The optical fiber 26 is preferably fixed to the curved portion 23E by an adhesive.

スペーサ２１は、光ファイバ２６が湾曲部２３Ｅに沿って湾曲するよう、光ファイバ２６を湾曲部２３Ｅに押さえる機能を有する。これにより、光ファイバ２６の端面２６Ａを光回路３に固定した状態で、光ファイバ２６を方向Ｄ１に延在させることができる。   The spacer 21 has a function of pressing the optical fiber 26 against the bending portion 23E so that the optical fiber 26 bends along the bending portion 23E. Thus, with the end face 26A of the optical fiber 26 fixed to the optical circuit 3, the optical fiber 26 can be extended in the direction D1.

スペーサ２１は、柱状又は筒状の構造体であり、柱状又は筒状の断面形状は任意である。例えば、図１〜図４に示すような方形断面であってもよいし、円形断面であってもよい。光ファイバ２６と接する押圧面２１Ｄの少なくとも一部は、湾曲部２３Ｅに沿って配置されていることが好ましく、例えば、図５に示すように、湾曲部２３Ｅの曲率半径に応じて湾曲していることが好ましい。   The spacer 21 is a columnar or cylindrical structure, and the sectional shape of the columnar or cylindrical shape is arbitrary. For example, it may be a square cross section as shown in FIGS. 1 to 4 or a circular cross section. At least a portion of the pressing surface 21D in contact with the optical fiber 26 is preferably disposed along the curved portion 23E, and is curved according to the radius of curvature of the curved portion 23E, for example, as shown in FIG. Is preferred.

保持部材２３，２４及びスペーサ２１の素材は任意であるが、例えば、ガラスや樹脂のほか、金属を用いることができる。保持部材２３，２４及びスペーサ２１が金属である場合は、熱硬化樹脂を用いて保持部材２３とスペーサ２１との間に光ファイバ２６を固定することができる。保持部材２３，２４及びスペーサ２１がＵＶに対して透明であるガラスや樹脂の場合は、ＵＶ硬化樹脂を用いて保持部材２３とスペーサ２１との間に光ファイバ２６を固定することができる。このように、保持部材２３，２４及びスペーサ２１がＵＶを透過することで、ＵＶ硬化樹脂で固定ができ、製造が簡便化される。   Although materials of the holding members 23 and 24 and the spacer 21 are arbitrary, for example, metal other than glass and resin can be used. When the holding members 23 and 24 and the spacer 21 are metal, the optical fiber 26 can be fixed between the holding member 23 and the spacer 21 using a thermosetting resin. When the holding members 23 and 24 and the spacer 21 are glass or resin transparent to UV, the optical fiber 26 can be fixed between the holding member 23 and the spacer 21 using a UV curing resin. As described above, since the holding members 23 and 24 and the spacer 21 transmit the UV, the fixing can be performed with the UV curing resin, and the manufacturing is simplified.

以上説明したように、本実施形態は、湾曲部２３Ｅにスペーサ２１を用いて光ファイバ２６を押し当てることで、湾曲部２３Ｅの曲率半径で光ファイバの曲げを制御することができる。ここで、本実施形態は、保持部材２３が湾曲部２３Ｅを有し、これによって保持部材２３と保持部材２４との間に生じた空隙にスペーサ２１を設けている。このため、本実施形態は、光ファイバ２６を固定している部品保持部材２３、２４及びスペーサ２１を大型化せずに光ファイバ２６の曲げ半径の制御を行うことができる。   As described above, in the present embodiment, the bending of the optical fiber can be controlled by the radius of curvature of the bending portion 23E by pressing the optical fiber 26 against the bending portion 23E using the spacer 21. Here, in the present embodiment, the holding member 23 has the curved portion 23E, and thereby the spacer 21 is provided in the space generated between the holding member 23 and the holding member 24. Therefore, according to the present embodiment, the bending radius of the optical fiber 26 can be controlled without increasing the size of the component holding members 23 and 24 and the spacer 21 fixing the optical fiber 26.

（第２の実施形態）
図６に、本実施形態に係る光ファイバ保持具の一例を示す。光ファイバ２６の曲げ応力の負荷によって、光ファイバ２６が保持部材２３から離れる方向にスペーサ２１が押し上げられ、スペーサ２１が剥離する可能性がある。そこで、本実施形態に係る光ファイバ保持具は、スペーサ２１が押し上げられないよう、スペーサ２１と保持部材２４とが平面２１Ｃと側面２４Ｃで固定されている。 Second Embodiment
FIG. 6 shows an example of the optical fiber holder according to the present embodiment. The load of the bending stress of the optical fiber 26 may push up the spacer 21 in the direction in which the optical fiber 26 is separated from the holding member 23, and the spacer 21 may be peeled off. Therefore, in the optical fiber holder according to the present embodiment, the spacer 21 and the holding member 24 are fixed by the flat surface 21C and the side surface 24C so that the spacer 21 is not pushed up.

本実施形態では、スペーサ２１と保持部材２４とが接着剤で接合できるよう、光回路３の上面３Ａから端面２４Ｅまでの高さＨ２４は、光回路３の上面３Ａから光ファイバ２６までの高さＨ２６よりも高いことが好ましい。また、図６では、スペーサ２１の断面形状が楔形状である例を示したが、本実施形態においても第１の実施形態と同様にスペーサ２１の断面形状は任意の形状とすることができる。 In the present embodiment, the height H 24 from the top surface 3 A of the optical circuit 3 to the end surface 24 E is the height from the top surface 3 A of the optical circuit 3 to the optical fiber 26 so that the spacer 21 and the holding member 24 can be bonded by an adhesive. it is preferably higher than H 26. 6 shows an example in which the cross-sectional shape of the spacer 21 is a wedge shape, the cross-sectional shape of the spacer 21 can be an arbitrary shape as in the first embodiment also in this embodiment.

スペーサ２１と保持部材２４との固定は強固であることが好ましく、保持部材２４とスペーサ２１は面で接触することが好ましい。そこで、本実施形態は、保持部材２４と当接する平面２１Ｃがスペーサ２１に設けられ、保持部材２４のうちの保持部材２３側の側面２４Ｃが平坦面となっている。このように、平面同士で接合することで、保持部材２３、２４とスペーサ２１の接触面積を増加させることができる。これにより、本実施形態は、光ファイバ２６の曲げの応力負荷によるスペーサ２１の剥離を防止することができる。   Fixing of the spacer 21 and the holding member 24 is preferably strong, and it is preferable that the holding member 24 and the spacer 21 be in surface contact. Therefore, in the present embodiment, the flat surface 21C in contact with the holding member 24 is provided on the spacer 21, and the side surface 24C of the holding member 24 on the holding member 23 side is a flat surface. Thus, the contact areas of the holding members 23 and 24 and the spacer 21 can be increased by joining the flat surfaces to each other. Thereby, the present embodiment can prevent the separation of the spacer 21 due to the stress load of the bending of the optical fiber 26.

ここで、本実施形態においても、スペーサ２１の押圧面２１Ｄは、図７に示すように、湾曲部２３Ｅの曲率半径に応じて湾曲していることが好ましい。   Here, also in the present embodiment, the pressing surface 21D of the spacer 21 is preferably curved according to the radius of curvature of the bending portion 23E as shown in FIG.

さらに、図８に示すように、スペーサ２１の面２１Ｅは、保持部材２４の端面２４Ｅと固定されていることが好ましい。これにより、保持部材２４とスペーサ２１との接着面積が増えるため、光ファイバ２６を湾曲部２３Ｅへより効率よく押し当てることができる。また、製造の際に保持部材２３、２４とスペーサ２１の位置固定を簡便化することができる。さらに、保持部材２４とスペーサ２１は、一体に形成されていてもよい。   Furthermore, as shown in FIG. 8, it is preferable that the surface 21 E of the spacer 21 be fixed to the end surface 24 E of the holding member 24. As a result, the bonding area between the holding member 24 and the spacer 21 is increased, so that the optical fiber 26 can be more efficiently pressed against the bending portion 23E. In addition, it is possible to simplify the position fixing of the holding members 23 and 24 and the spacer 21 during manufacturing. Furthermore, the holding member 24 and the spacer 21 may be integrally formed.

また、スペーサ２１は、光ファイバ２６が方向Ｄ１に延在する程度に、十分な長さを有することが好ましい。例えば、図７及び図８に示すように、光ファイバ２６の端面２６Ａを基準とした距離Ｄ２１と距離Ｄ２３を比較することによって定めてもよい。ここで、距離Ｄ２１は、保持部材２３のうちの光ファイバ２６の端面２６Ａの位置から方向Ｄ１へのスペーサ２１の端部までの方向Ｄ１上での距離である。距離Ｄ２３は、保持部材２３のうちの光ファイバ２６の端面２６Ａの位置から方向Ｄ１への保持部材２３の端部までの方向Ｄ１上での距離である。例えば、スペーサ２１に備わる押圧面２１Ｄと光ファイバ２６とが接触する長さが、保持部材２３に備わる湾曲部２３Ｅと光ファイバ２３とが接触する長さよりも長い。 The spacer 21 preferably has a sufficient length such that the optical fiber 26 extends in the direction D1. For example, as shown in FIG. 7 and FIG. 8, it may be determined by comparing the distance D 21 with the distance D 23 based on the end face 26 A of the optical fiber 26. Here, the distance D 21 is the distance on the direction D1 from the position of the end face 26A of the optical fiber 26 to the end of the spacer 21 in the direction D1 of the holding member 23. The distance D 23 is the distance on the direction D1 from the position of the end face 26A of the optical fiber 26 to the end portion of the holding member 23 in the direction D1 of the holding member 23. For example, the length of contact between the pressing surface 21D of the spacer 21 and the optical fiber 26 is longer than the length of contact of the bending portion 23E of the holding member 23 with the optical fiber 23.

また、図８に示すように、保持部材２４の端面２４Ｅをスペーサ２１と平面同士で接合する場合、光回路３の上面３Ａから端面２４Ｅまでの高さＨ２４は、第２の実施形態の記載に関わらず、光回路３の上面３Ａから光ファイバ２６までの高さＨ２６と同程度とすることができ、光回路３の上面３Ａから光ファイバ２６までの高さＨ２６よりも低くてもよい。 Further, as shown in FIG. 8, in the case where the end face 24E of the holding member 24 is joined to the spacer 21 in plan, the height H 24 from the top face 3A to the end face 24E of the optical circuit 3 is the description of the second embodiment. regardless, from the upper surface 3A of the optical circuit 3 and the optical fiber 26 and the height H 26 can be comparable, be lower than the height H 26 of the upper surface 3A of the optical circuit 3 and the optical fiber 26 Good.

（第３の実施形態）
図９に、本実施形態に係る光ファイバ保持具の一例を示す。本実施形態に係る光ファイバ保持具は、光ファイバ２６を挟持する２つの保持部材２３、２４を備える。本実施形態に係る光ファイバ保持具は、保持部材２３、２４を用いて、光ファイバ２６の端面２６Ａを光回路３の上面３Ａに接続する。保持部材２３は、光ファイバ２６の延在する方向Ｄ１に配置され、第１の保持部材として機能する。保持部材２４は第２の保持部材として機能する。保持部材２３の他端２３Ｂは、方向Ｄ１に沿った予め定められた曲率半径で湾曲する湾曲部２３Ｅを備える。 Third Embodiment
FIG. 9 shows an example of the optical fiber holder according to the present embodiment. The optical fiber holder according to the present embodiment includes two holding members 23 and 24 for holding the optical fiber 26. The optical fiber holder according to the present embodiment connects the end face 26A of the optical fiber 26 to the upper surface 3A of the optical circuit 3 using the holding members 23 and 24. The holding member 23 is disposed in the extending direction D1 of the optical fiber 26, and functions as a first holding member. The holding member 24 functions as a second holding member. The other end 23B of the holding member 23 includes a curved portion 23E that curves at a predetermined radius of curvature along the direction D1.

光ファイバ２６と保持部材２３及び２４は接着剤で固定される。この固定の際に、接着剤が湾曲部２３Ｅへ流入すると、湾曲部２３Ｅの形状が変化したり、湾曲部２３Ｅで湾曲させる光ファイバ２６に接着剤が付着したりするなどして、光ファイバ２６に破断が生じる可能性がある。そこで、湾曲部２３Ｅへの接着剤の流入を防ぐため、保持部材２４は、光ファイバ２６の固着に用いた接着剤を流入させるための凹部３１を備える。本実施形態では、一例として、凹部３１が保持部材２４のみに設けられる例を示すが、本開示は、これに限らず、凹部３１は、保持部材２３に設けても同様の効果を得ることが可能であり、保持部材２３及び２４の両方に設けられていてもよい。   The optical fiber 26 and the holding members 23 and 24 are fixed by an adhesive. In this fixing, when the adhesive flows into the curved portion 23E, the shape of the curved portion 23E changes, or the adhesive adheres to the optical fiber 26 to be bent by the curved portion 23E, etc. May break. Therefore, in order to prevent the adhesive from flowing into the curved portion 23E, the holding member 24 is provided with a recess 31 for allowing the adhesive used for fixing the optical fiber 26 to flow. In the present embodiment, an example in which the recess 31 is provided only in the holding member 24 is shown as an example, but the present disclosure is not limited thereto, and the same effect can be obtained even if the recess 31 is provided in the holding member 23 It is possible and may be provided to both of the holding members 23 and 24.

図１０及び図１１に、本実施形態に係る光ファイバ保持具の詳細構造の第１例及び第２例を示す。保持部材２３は第３の平面として機能する平面２３Ｃを備え、保持部材２４は光ファイバ２６の素線２６Ｃを保持するための溝３３を備える。光ファイバ２６の素線２６Ｃは、平面２３Ｃ及び溝３３に挟持される。光ファイバ２６の素線２６Ｃが挟持されている部分を光ファイバ保持部２７とする。   10 and 11 show a first example and a second example of the detailed structure of the optical fiber holder according to the present embodiment. The holding member 23 is provided with a flat surface 23 C functioning as a third flat surface, and the holding member 24 is provided with a groove 33 for holding the strands 26 C of the optical fiber 26. The strand 26C of the optical fiber 26 is sandwiched between the flat surface 23C and the groove 33. A portion of the optical fiber 26 in which the strands 26C of the optical fiber 26 are held is referred to as an optical fiber holding portion 27.

本実施形態では、溝３３が保持部材２４に備わる例を示すが、溝３３は、第１及び第２の実施形態と同様に、保持部材２３及び２４の少なくともいずれかに形成されていればよい。すなわち、光ファイバ保持部２７の構成は、第１の実施形態で示した図２、図３及び図４のいずれの構成も採用しうる。   In the present embodiment, an example in which the groove 33 is provided in the holding member 24 is shown, but the groove 33 may be formed in at least one of the holding members 23 and 24 as in the first and second embodiments. . That is, as the configuration of the optical fiber holding portion 27, any of the configurations shown in FIGS. 2, 3 and 4 shown in the first embodiment can be adopted.

保持部材２３は第１の平面として機能する平面２３Ｄを備え、保持部材２４は第２の平面として機能する平面２４Ｄを備える。平面２３Ｄは、湾曲面２３Ｅに接続する平面である。平面２４Ｄは、光ファイバ２６を挟んで平面２３Ｄと対峙する平面である。このように、平面２３Ｄ及び平面２４Ｄは、光ファイバ保持部２７の端面２４Ｅ側に配置されている。   The holding member 23 includes a flat surface 23D that functions as a first flat surface, and the holding member 24 includes a flat surface 24D that functions as a second flat surface. The plane 23D is a plane connected to the curved surface 23E. The flat surface 24D is a flat surface facing the flat surface 23D with the optical fiber 26 interposed therebetween. Thus, the plane 23D and the plane 24D are disposed on the end face 24E side of the optical fiber holding portion 27.

凹部３１は、平面２３Ｄ又は２４Ｄの少なくともいずれか一方に設けられている。これによって、湾曲部２３Ｅへの接着剤の流入を防ぐ。また光ファイバ２６の素線２６Ｃと光ファイバの被覆２６Ｂの端部２６Ｅが直線状に保たれるよう、平面２３Ｄと平面２３Ｃは平行であることが好ましく、さらに平面２３Ｄと平面２４Ｄは平行であることが好ましい。   The recess 31 is provided in at least one of the flat surfaces 23D and 24D. This prevents the adhesive from flowing into the curved portion 23E. Further, it is preferable that the flat surface 23D and the flat surface 23C be parallel, and that the flat surface 23D and the flat surface 24D be parallel so that the wire 26C of the optical fiber 26 and the end 26E of the coating 26B of the optical fiber are kept straight. Is preferred.

凹部３１は、光ファイバ２６の保持に用いられる接着剤を流入させることの可能な任意の形状を採用しうる。例えば、図９及び図１０（ｃ）に示すような溝形状である。凹部３１の幅Ｗ３１は、任意であり、図１１（ｃ）に示すように、保持部材２４の端面２４Ｅに達する段差形状を構成していてもよい。 The recess 31 may have any shape that allows the adhesive used to hold the optical fiber 26 to flow. For example, it is a groove shape as shown in FIG.9 and FIG.10 (c). The width W 31 of the recess 31 is arbitrary, and as shown in FIG. 11C, may have a step shape reaching the end face 24E of the holding member 24.

本開示は、光ファイバ２６が湾曲部２３Ｅで湾曲される。このときに光ファイバ２６の素線２６Ｃが湾曲部２３Ｅで湾曲されると、光ファイバ２６の素線２６Ｃが曲げ応力に耐えられずに破断することがある。そこで、湾曲部２３Ｅでの曲げ応力が光ファイバ２６の素線２６Ｃに加わらないよう、光ファイバ２６の被覆２６Ｂの端部２６Ｅは、平面２３Ｄ及び平面２４Ｄで挟持されていることが好ましい。   In the present disclosure, the optical fiber 26 is bent at the bending portion 23E. At this time, if the strand 26C of the optical fiber 26 is bent at the bending portion 23E, the strand 26C of the optical fiber 26 may break without being able to withstand bending stress. Therefore, it is preferable that the end 26E of the coating 26B of the optical fiber 26 be sandwiched between the flat surface 23D and the flat surface 24D so that bending stress at the curved portion 23E is not applied to the strand 26C of the optical fiber 26.

光ファイバ２６の素線２６Ｃ部分は折れやすい傾向にある。そのため、光ファイバ２６の被覆２６Ｂの端部２６Ｅは、平面２３Ｄと平面２４Ｄに接着剤で固定されていることが好ましい。そのため、凹部３１は、光ファイバ２６の被覆２６Ｂの端部２６Ｅよりも保持部材２４の端面２４Ｅ側に配置されていること、即ち凹部３１は光ファイバの被覆の配置されている部分に設けられていることが好ましい。これにより、光ファイバ２６の素線２６Ｃの全体が接着剤で固定され、さらに光ファイバ２６の被覆２６Ｂまで接着剤で固定されるため、光ファイバ２６の素線２６Ｃの破断を防ぐことができる。   The strands 26C of the optical fiber 26 tend to be broken. Therefore, it is preferable that the end 26E of the coating 26B of the optical fiber 26 be fixed to the plane 23D and the plane 24D with an adhesive. Therefore, the recess 31 is disposed closer to the end face 24E of the holding member 24 than the end 26E of the coating 26B of the optical fiber 26, that is, the recess 31 is provided in the portion where the coating of the optical fiber is disposed. Is preferred. As a result, the entire strand 26C of the optical fiber 26 is fixed by the adhesive and is fixed to the coating 26B of the optical fiber 26 by the adhesive, so breakage of the strand 26C of the optical fiber 26 can be prevented.

光ファイバ保持部２７は光ファイバ２６の素線２６Ｃを挟持し、平面２３Ｄ及び２４Ｄは光ファイバ２６の被覆２６Ｂを挟持する。そのため、光ファイバ保持部２７と平面２３Ｄとの間には、光ファイバ２６の被覆２６Ｂの厚みに応じた段差が設けられていることが好ましい。例えば、平面２３Ｃ及び平面２３Ｄは平行であり、これらの面の距離が光ファイバ２６の被覆２６Ｂの厚みに略等しい。これにより、光ファイバ保持部２７は、光ファイバ２６の素線２６Ｃに曲げ応力を与えることなく、光ファイバ２６の被覆２６Ｂの端部２６Ｅを挟持することができる。このような光ファイバ２６の被覆２６Ｂの厚みに応じた段差は、保持部材２３に限らず、保持部材２４に設けられていてもよいし、保持部材２３及び２４の両方に設けられていてもよい。   The optical fiber holding portion 27 sandwiches the strand 26C of the optical fiber 26, and the flat surfaces 23D and 24D sandwich the coating 26B of the optical fiber 26. Therefore, it is preferable that a level difference corresponding to the thickness of the coating 26B of the optical fiber 26 be provided between the optical fiber holding portion 27 and the flat surface 23D. For example, plane 23C and plane 23D are parallel, and the distance between these planes is approximately equal to the thickness of coating 26B of optical fiber 26. Thereby, the optical fiber holding portion 27 can hold the end 26E of the coating 26B of the optical fiber 26 without giving bending stress to the strand 26C of the optical fiber 26. Such a step according to the thickness of the coating 26B of the optical fiber 26 may be provided not only on the holding member 23 but also on the holding member 24 or may be provided on both the holding members 23 and 24. .

以上説明したように、本実施形態に係る光ファイバ保持具は、湾曲部２３Ｅを備えるため、光ファイバ２６を固定している部品を大型化せずに曲げ半径の制御を可能にすることができる。また本実施形態に係る光ファイバ保持具は、凹部３１を備えるため、湾曲部２３Ｅへの接着剤の流入を防ぐことができる。また本実施形態に係る光ファイバ保持具は、光ファイバ保持部２７で光ファイバ２６の素線２６Ｃを挟持し、光ファイバ２６の被覆２６Ｂの端部２６Ｅが光ファイバ保持部２７の近傍まで配置されているため、光ファイバ２６の素線２６Ｃへの曲げ応力を防ぐことができる。   As described above, since the optical fiber holder according to the present embodiment includes the bending portion 23E, the bending radius can be controlled without increasing the size of the component fixing the optical fiber 26. . In addition, since the optical fiber holder according to the present embodiment includes the concave portion 31, the adhesive can be prevented from flowing into the bending portion 23E. Further, in the optical fiber holder according to the present embodiment, the strands 26C of the optical fiber 26 are held by the optical fiber holder 27, and the end 26E of the coating 26B of the optical fiber 26 is disposed to the vicinity of the optical fiber holder 27. Because of this, it is possible to prevent bending stress on the strands 26C of the optical fiber 26.

（第４の実施形態）
本実施形態に係る光ファイバ保持具は、第３の実施形態で説明した光ファイバ保持具に、さらに、第１及び第２の実施形態で説明したスペーサ２１をさらに備える。図１２は図１０に示す光ファイバ保持具の第３の実施形態への適用例を示し、図１３は図１１に示す光ファイバ保持具の第３の実施形態への適用例を示す。 Fourth Embodiment
The optical fiber holder according to the present embodiment further includes the spacer 21 described in the first and second embodiments, in addition to the optical fiber holder described in the third embodiment. FIG. 12 shows an application example of the optical fiber holder shown in FIG. 10 to the third embodiment, and FIG. 13 shows an application example of the optical fiber holder shown in FIG. 11 to the third embodiment.

本実施形態では、光ファイバ２６の被覆２６Ｂの端部２６Ｅが平面２３Ｄと平面２４Ｄで挟持され、平面２４Ｄに凹部３１が設けられている。   In the present embodiment, the end 26E of the coating 26B of the optical fiber 26 is sandwiched between the flat surface 23D and the flat surface 24D, and the concave portion 31 is provided in the flat surface 24D.

保持部材２３及び２４並びにスペーサ２１は、光ファイバ２６を挟持して接着剤で固定されている。本開示は、凹部３１を備えるため、光ファイバ保持部２７の接着剤の湾曲部２３Ｅへ流入を防ぎ、これにより光ファイバ２６を適切な位置に配置した状態でスペーサ２１の接着を行うことができる。   The holding members 23 and 24 and the spacer 21 sandwich the optical fiber 26 and are fixed by an adhesive. Since the present disclosure includes the recess 31, the inflow of the adhesive of the optical fiber holding portion 27 into the curved portion 23E can be prevented, whereby the spacer 21 can be bonded in a state where the optical fiber 26 is disposed at an appropriate position. .

凹部３１が図１１に示すような段差形状の場合、図１３に示す凹部３１の端面２４Ａ側の端部から端面２４Ｅまでの寸法Ｈ３１は、スペーサ２１の凸部の寸法Ｈ２１と同じでもよいが、Ｈ２１よりも大きい寸法の形態を採用しうる。これにより、凹部３１の端面２４Ａ側の端部とスペーサ２１との間に、接着剤を流入させるための空隙を設けることができる。 When the recess 31 has a step shape as shown in FIG. 11, the dimension H 31 from the end on the end face 24 A side of the recess 31 to the end face 24 E shown in FIG. 13 may be the same as the dimension H 21 of the protrusion of the spacer 21. However, it is possible to adopt a form of dimensions larger than H 21 . Thereby, a space for allowing the adhesive to flow can be provided between the end on the end face 24 A side of the recess 31 and the spacer 21.

本開示は情報通信産業に適用することができる。   The present disclosure can be applied to the information and communication industry.

２１：スペーサ
２３、２４：保持部材
２６：光ファイバ
３：光回路
２７：光ファイバ保持部
３１：凹部
３３：溝 21: spacer 23, 24: holding member 26: optical fiber 3: optical circuit 27: optical fiber holding portion 31: concave portion 33: groove

Claims (6)

一端に光ファイバの端部が配置され、他端において前記光ファイバが延在するように配置される第１の保持部材と、
前記第１の保持部材と共に前記光ファイバを挟持する第２の保持部材と、
を備え、
前記第１の保持部材及び前記第２の保持部材は、前記光ファイバの素線を挟持する光ファイバ保持部を前記一端に備え、
前記第１の保持部材の前記他端は、前記光ファイバの延在方向に沿った予め定められた曲率半径で湾曲する湾曲部を備え、
前記湾曲部と接続する、前記第１の保持部材に備わる第１の平面、或いは前記光ファイバを挟んで前記第１の平面と対峙する、前記第２の保持部材に備わる第２の平面、の少なくともいずれか一方に、凹部が設けられている、
光ファイバ保持具。 A first holding member having an end of an optical fiber disposed at one end and the optical fiber extending at the other end;
A second holding member for holding the optical fiber together with the first holding member;
Equipped with
The first holding member and the second holding member have an optical fiber holding portion for holding the strands of the optical fiber at the one end,
The other end of the first holding member includes a curved portion that curves at a predetermined radius of curvature along the extension direction of the optical fiber,
A first flat surface of the first holding member connected to the curved portion, or a second flat surface of the second holding member facing the first flat surface with the optical fiber interposed therebetween A recess is provided in at least one of the
Optical fiber holder. 前記凹部は、前記光ファイバの被覆の配置されている部分に設けられている、
請求項１に記載の光ファイバ保持具。 The recess is provided in a portion where the coating of the optical fiber is disposed,
The optical fiber holder according to claim 1. 前記光ファイバ保持部は、前記第１の保持部材に備わる第３の平面及び前記第２の保持部材に備わる溝を用いて、前記光ファイバの素線を挟持している、
請求項１又は２に記載の光ファイバ保持具。 The optical fiber holding unit holds the strands of the optical fiber using a third plane provided to the first holding member and a groove provided to the second holding member.
The optical fiber holder according to claim 1 or 2. 前記第３の平面は、前記第１の平面に略平行である、
請求項３に記載の光ファイバ保持具。 The third plane is substantially parallel to the first plane,
The optical fiber holder according to claim 3. 前記第２の平面は、前記第１の平面に略平行である、
請求項１から３のいずれかに記載の光ファイバ保持具。 The second plane is substantially parallel to the first plane,
The optical fiber holder according to any one of claims 1 to 3. 前記第１の保持部材の前記他端に前記光ファイバを固定するスペーサをさらに備え、
前記湾曲部と前記スペーサの間に前記光ファイバが固定されている、
請求項１から５のいずれかに記載の光ファイバ保持具。 It further comprises a spacer for fixing the optical fiber to the other end of the first holding member,
The optical fiber is fixed between the curved portion and the spacer.
The optical fiber holder according to any one of claims 1 to 5.
JP2017207820A 2017-04-04 2017-10-27 Optical fiber holder Active JP6904213B2 (en)

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CN201880021188.4A CN110770618B (en) 2017-04-04 2018-02-20 Optical fiber member
PCT/JP2018/005969 WO2018186037A1 (en) 2017-04-04 2018-02-20 Optical fiber member and optical fiber holder
TW107111613A TWI664459B (en) 2017-04-04 2018-04-02 Optical fiber component and optical fiber holder

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