JP2006030366A - Mfd converting adapter - Google Patents

Mfd converting adapter Download PDF

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Publication number
JP2006030366A
JP2006030366A JP2004205859A JP2004205859A JP2006030366A JP 2006030366 A JP2006030366 A JP 2006030366A JP 2004205859 A JP2004205859 A JP 2004205859A JP 2004205859 A JP2004205859 A JP 2004205859A JP 2006030366 A JP2006030366 A JP 2006030366A
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Japan
Prior art keywords
mfd
optical fiber
mode field
field diameter
ferrule
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JP2004205859A
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Japanese (ja)
Inventor
Hidenori Iida
秀徳 飯田
Satoshi Takehana
敏 竹鼻
Shinichi Himura
伸一 樋村
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Totoku Electric Co Ltd
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Totoku Electric Co Ltd
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Priority to JP2004205859A priority Critical patent/JP2006030366A/en
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  • Optical Fibers, Optical Fiber Cores, And Optical Fiber Bundles (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide a mode field diameter (MFD) converting adapter with which handling such as storing and transporting or the like is made easy. <P>SOLUTION: The MFD converting adapter is provided with: a housing 1 which has a plug section 1p on one end side and a receptacle section 1r on the other end side; a ferrule 2 which goes through from the plug section 1p to the receptacle 1r; and an MFD converting optical fiber 10 which is inserted into the ferrule 2. In the MFD converting optical fiber 10, an optical fiber whose mode field diameter is 10.5μm and an optical fiber whose mode field diameter is 6.5μm are welded together and the connecting section is heat treated to make the change in the mode field diameter smooth. Since the MFD converting optical fiber is inserted into the ferrule, the MFD converting optical fiber is not broken while being stored and transported. Since the two connector sections are integrated by the housing, the size is reduced as a whole and handling of the adapter during storing and transporting is made easy. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

本発明は、ＭＦＤ変換アダプタに関し、さらに詳しくは、保管や搬送などの取り扱いが容易なＭＦＤ変換アダプタに関する。   The present invention relates to an MFD conversion adapter, and more particularly to an MFD conversion adapter that can be easily handled such as storage and transportation.

従来、接続損失を小さくするために、一端面におけるモードフィールド径と他端面におけるモードフィールド径とが異なり且つモードフィールド径の変化が滑らかなＭＦＤ変換光ファイバを介在させて、モードフィールド径の異なる光ファイバを接続する技術が知られている（例えば、特許文献１、２参照。）。
特開２００３−３１５６００号公報 特開２００３−３０２５３９号公報 Conventionally, in order to reduce the connection loss, light having a different mode field diameter is interposed by interposing an MFD conversion optical fiber in which the mode field diameter at the one end surface is different from the mode field diameter at the other end surface and the mode field diameter changes smoothly. Techniques for connecting fibers are known (for example, see Patent Documents 1 and 2).
JP 2003-315600 A JP 2003-302539 A

例えば屋外のモードフィールド径の大きな光ファイバと屋内のモードフィールド径の小さな光ファイバとをＭＦＤ変換光ファイバを介して接続する場合、熱処理により融着させて接続する工事を現場で行のは、設備・時間・技術者が必要になり、困難性がある。そこで、ＭＦＤ変換光ファイバの両端にコネクタを設けておき、コネクタ接続するならば、現場での工事が容易になる。
しかし、ＭＦＤ変換光ファイバでモードフィールド径の変化を滑らかにするために熱処理している部分は曲げられないので、ＭＦＤ変換光ファイバの両端にコネクタを設けた物は、保管時や運搬時などにＭＦＤ変換光ファイバが折れないように注意する必要があり、取り扱いが面倒になる問題点があった。
そこで、本発明の目的は、保管や搬送などの取り扱いが容易なＭＦＤ変換アダプタを提供することにある。 For example, when connecting an outdoor optical fiber with a large mode field diameter and an indoor optical fiber with a small mode field diameter via an MFD conversion optical fiber, the work to be fused and connected by heat treatment is performed on site.・ Time and engineers are required, which is difficult. Therefore, if a connector is provided at both ends of the MFD conversion optical fiber and the connector is connected, the construction at the site becomes easy.
However, since the MFD conversion optical fiber that is heat-treated to smooth the change in the mode field diameter cannot be bent, the MFD conversion optical fiber that has connectors at both ends can be stored or transported. Care must be taken to prevent the MFD conversion optical fiber from being broken, and there is a problem that the handling becomes troublesome.
Therefore, an object of the present invention is to provide an MFD conversion adapter that can be easily handled such as storage and transportation.

第１の観点では、本発明は、一端面におけるモードフィールド径と他端面におけるモードフィールド径とが異なり且つモードフィールド径の変化が滑らかであるＭＦＤ変換光ファイバと、一端側に第１コネクタ部を有し他端側に第２コネクタ部を有するハウジングと、前記第１コネクタ部から前記第２コネクタ部に渡って貫通すると共に前記ＭＦＤ変換光ファイバが挿入されたフェルールとを具備したことを特徴とするＭＦＤ変換アダプタを提供する。
上記第１の観点によるＭＦＤ変換アダプタでは、例えば屋外のモードフィールド径の大きな光ファイバと屋内のモードフィールド径の小さな光ファイバとを現場で簡単な工事で接続できる。そして、ＭＦＤ変換光ファイバをフェルール中に挿入してしまったため、保管時や運搬時などにＭＦＤ変換光ファイバが折れることはなく、取り扱いが容易になる。また、２つのコネクタ部がハウジングで一体化されており、全体として小型になるため、この点でも保管時や運搬時などの取り扱いが容易になる。 In a first aspect, the present invention provides an MFD conversion optical fiber in which the mode field diameter at the one end surface is different from the mode field diameter at the other end surface and the change in the mode field diameter is smooth, and the first connector portion is provided at one end side. And a housing having a second connector portion on the other end side, and a ferrule penetrating from the first connector portion to the second connector portion and having the MFD conversion optical fiber inserted therein. An MFD conversion adapter is provided.
In the MFD conversion adapter according to the first aspect, for example, an outdoor optical fiber having a large mode field diameter and an indoor optical fiber having a small mode field diameter can be connected on site by simple construction. Since the MFD conversion optical fiber has been inserted into the ferrule, the MFD conversion optical fiber is not broken during storage or transportation, and handling becomes easy. In addition, since the two connector parts are integrated in the housing, and the overall size is reduced, handling at the time of storage and transportation is also facilitated in this respect.

本発明のＭＦＤ変換アダプタによれば、例えば屋外のモードフィールド径の大きな光ファイバと屋内のモードフィールド径の小さな光ファイバとを現場で簡単な工事で接続できる。そして、ＭＦＤ変換アダプタの保管や搬送などの取り扱いが容易になる。   According to the MFD conversion adapter of the present invention, for example, an outdoor optical fiber having a large mode field diameter and an indoor optical fiber having a small mode field diameter can be connected by simple construction on site. And handling, such as storage and conveyance of an MFD conversion adapter, becomes easy.

以下、図に示す実施例により本発明をさらに詳細に説明する。なお、これにより本発明が限定されるものではない。   Hereinafter, the present invention will be described in more detail with reference to the embodiments shown in the drawings. Note that the present invention is not limited thereby.

図１は、実施例１に係るＳＣ型のＭＦＤ変換アダプタ１００を示す一部破断正面図である。図２は、同左側面図である。図３は、同上面図である。
このＭＦＤ変換アダプタ１００は、一端側にプラグ部１ｐを有し他端側にレセプタクル部１ｒを有するハウジング１と、プラグ部１ｐからレセプタクル部１ｒに渡って貫通するフェルール２と、フェルール２に挿入されたＭＦＤ変換光ファイバ１０とを具備してなる。 FIG. 1 is a partially broken front view showing an SC type MFD conversion adapter 100 according to the first embodiment. FIG. 2 is a left side view of the same. FIG. 3 is a top view of the same.
This MFD conversion adapter 100 is inserted into a housing 1 having a plug portion 1p on one end side and a receptacle portion 1r on the other end side, a ferrule 2 penetrating from the plug portion 1p to the receptacle portion 1r, and a ferrule 2 And an MFD conversion optical fiber 10.

図４は、ＭＦＤ変換光ファイバ１０の断面図である。
このＭＦＤ変換光ファイバ１０は、モードフィールド径ＭＦＤ＝１０.５μｍの光ファイバ１１とモードフィールド径ＭＦＤ＝６.５μｍの光ファイバ１２とを融着し、接続部１３を熱処理してモードフィールド径の変化を滑らかにしたものである。 FIG. 4 is a cross-sectional view of the MFD conversion optical fiber 10.
This MFD conversion optical fiber 10 is formed by fusing an optical fiber 11 having a mode field diameter MFD = 10.5 μm and an optical fiber 12 having a mode field diameter MFD = 6.5 μm, and heat-treating the connecting portion 13 to obtain a mode field diameter. It is a smooth change.

−製造例−
（１）波長１５５０ｎｍにおけるモードフィールド径ＭＦＤ＝１０.５μｍの光ファイバ１１とモードフィールド径ＭＦＤ＝６.５μｍの光ファイバ１２とを融着し、接続部１３を熱処理してモードフィールド径の変化を滑らかにしたＭＦＤ変換光ファイバ１０を作製した。
（２）このＭＦＤ変換光ファイバ１０をフェルール２に挿入し、接着し、接着剤硬化後、フェルール２の端面を研磨した。
（３）フェルール２をハウジング１に組み入れ、ＭＦＤ変換アダプタ１００とした。
（４）図５の（ａ）に示すように、ＬＤ光源Ｓと光パワーメータＭとをコネクタ付き光コードＣ１（ＭＦＤ＝１０.５μｍ）で接続し、光パワーメータＭで光強度Ｐ０を測定する。次に、図５の（ｂ）に示すように、ＬＤ光源ＳとＭＦＤ変換アダプタ１００のプラグ部１ｐ（ＭＦＤ変換光ファイバ１０のモードフィールド径ＭＦＤ＝１０.５μｍ側）とをコネクタ付き光コードＣ１（ＭＦＤ＝１０.５μｍ）で接続すると共にＭＦＤ変換アダプタ１００のレセプタクル部１ｒ（ＭＦＤ変換光ファイバ１０のモードフィールド径ＭＦＤ＝６.５μｍ側）と光パワーメータＭとをコネクタ付き光コードＣ２（ＭＦＤ＝６.５μｍ）で接続し、光強度Ｐ１を測定する。そして、ＭＦＤ変換アダプタ１００の損失Ｌ＝−１０・log（Ｐ１／Ｐ０）を求めたところ、波長１５５０ｎｍにおける光損失Ｌは０.２１ｄＢであった。比較のために、図５の（ｃ）に示すように、ＭＦＤ変換アダプタ１００を外してコネクタ付き光コードＣ１（ＭＦＤ＝１０.５μｍ）とコネクタ付き光コードＣ２（ＭＦＤ＝６.５μｍ）とを直接接続し、光強度Ｐ２を測定し、損失Ｌ＝−１０・log（Ｐ２／Ｐ０）を求めたところ、波長１５５０ｎｍにおける光損失Ｌは約１ｄＢであった。 -Production example-
(1) An optical fiber 11 with a mode field diameter MFD = 10.5 μm and an optical fiber 12 with a mode field diameter MFD = 6.5 μm at a wavelength of 1550 nm are fused, and the connection portion 13 is heat treated to change the mode field diameter. A smoothed MFD conversion optical fiber 10 was produced.
(2) The MFD conversion optical fiber 10 was inserted into the ferrule 2, adhered, and after curing the adhesive, the end surface of the ferrule 2 was polished.
(3) The ferrule 2 is incorporated into the housing 1 to form the MFD conversion adapter 100.
(4) As shown in FIG. 5A, the LD light source S and the optical power meter M are connected by an optical cord C1 with connector (MFD = 10.5 μm), and the optical intensity P0 is measured by the optical power meter M. To do. Next, as shown in FIG. 5 (b), the LD light source S and the plug portion 1p of the MFD conversion adapter 100 (mode field diameter MFD = 10.5 μm side of the MFD conversion optical fiber 10) are connected to the optical cord C1 with a connector. (MFD = 10.5 μm) and the receptacle 1r of the MFD conversion adapter 100 (mode field diameter MFD = 6.5 μm side of the MFD conversion optical fiber 10) and the optical power meter M are connected to an optical cord C2 (MFD). = 6.5 μm), and the light intensity P1 is measured. When the loss L = −10 · log (P1 / P0) of the MFD conversion adapter 100 was determined, the light loss L at a wavelength of 1550 nm was 0.21 dB. For comparison, as shown in FIG. 5C, the MFD conversion adapter 100 is removed, and the optical cord C1 with connector (MFD = 10.5 μm) and the optical cord C2 with connector (MFD = 6.5 μm) are used. When directly connected, the light intensity P2 was measured, and the loss L = −10 · log (P2 / P0) was determined. The light loss L at a wavelength of 1550 nm was about 1 dB.

図６に示すように、モードフィールド径ＭＦＤ＝６.５μｍの光ファイバ１２の一部を熱処理して拡径部１２ａを作り、その拡径部１２ａで切断したＭＦＤ変換光ファイバ１０を用いてもよい。   As shown in FIG. 6, a part of an optical fiber 12 having a mode field diameter MFD = 6.5 μm is heat-treated to form an enlarged diameter portion 12a, and an MFD conversion optical fiber 10 cut by the enlarged diameter portion 12a may be used. Good.

−製造例−
（１）波長１５５０ｎｍにおけるモードフィールド径ＭＦＤ＝６.５μｍの光ファイバ１２の一部を熱処理して拡径部１２ａを作り、その拡径部１２ａで切断してＭＦＤ変換光ファイバ１０を作製した。切断面でのモードフィールド径ＭＦＤ＝１０.２μｍとした。
（２）このＭＦＤ変換光ファイバ１０をフェルール２に挿入し、接着し、接着剤硬化後、フェルール２の端面を研磨した。
（３）フェルール２をハウジング１に組み入れ、ＭＦＤ変換アダプタ１００とした。
（４）実施例１と同様にＭＦＤ変換アダプタ１００の損失Ｌ＝−１０・log（Ｐ１／Ｐ０）を求めたところ、波長１５５０ｎｍにおける光損失Ｌは０.２８ｄＢであった。 -Production example-
(1) A part of the optical fiber 12 having a mode field diameter MFD = 6.5 μm at a wavelength of 1550 nm was heat-treated to form the enlarged diameter part 12a, and the MFD converted optical fiber 10 was produced by cutting at the enlarged diameter part 12a. The mode field diameter MFD at the cut surface was 10.2 μm.
(2) The MFD conversion optical fiber 10 was inserted into the ferrule 2, adhered, and after curing the adhesive, the end surface of the ferrule 2 was polished.
(3) The ferrule 2 is incorporated into the housing 1 to form the MFD conversion adapter 100.
(4) When the loss L = −10 · log (P1 / P0) of the MFD conversion adapter 100 was determined in the same manner as in Example 1, the optical loss L at the wavelength of 1550 nm was 0.28 dB.

ＳＣ型に限定されず、例えばＦＣ型であってもよい。   It is not limited to SC type, for example, FC type may be used.

ハウジング１の両側をプラグ１ｐとしたり、両側をレセプタクル１ｒとしてもよい。   Both sides of the housing 1 may be plugs 1p, or both sides may be receptacles 1r.

本発明のＭＦＤ変換アダプタは、例えば屋外のモードフィールド径の大きな光ファイバと屋内のモードフィールド径の小さな光ファイバとを接続するのに利用できる。   The MFD conversion adapter of the present invention can be used to connect, for example, an outdoor optical fiber having a large mode field diameter and an indoor optical fiber having a small mode field diameter.

実施例１に係るＭＦＤ変換アダプタを示す正面図である。1 is a front view showing an MFD conversion adapter according to Embodiment 1. FIG. 実施例１に係るＭＦＤ変換アダプタを示す左側面図である。It is a left view which shows the MFD conversion adapter which concerns on Example 1. FIG. 実施例１に係るＭＦＤ変換アダプタを示す上面図である。1 is a top view showing an MFD conversion adapter according to Embodiment 1. FIG. 実施例１に係るＭＦＤ変換光ファイバを示す断面図である。1 is a cross-sectional view illustrating an MFD conversion optical fiber according to a first embodiment. 実施例１に係るＭＦＤ変換アダプタの損失を計測する状態の説明図である。It is explanatory drawing of the state which measures the loss of the MFD conversion adapter which concerns on Example 1. FIG. 実施例２に係るＭＦＤ変換光ファイバを示す断面図である。6 is a cross-sectional view showing an MFD conversion optical fiber according to Example 2. FIG.

符号の説明Explanation of symbols

１ ハウジング
１ｐ プラグ部
１ｒ レセプタクル部
２ フェルール
１０ ＭＦＤ変換光ファイバ
１１，１２ 光ファイバ
１２ａ 拡径部
１３ 接続部
１００ ＭＦＤ変換アダプタ DESCRIPTION OF SYMBOLS 1 Housing 1p Plug part 1r Receptacle part 2 Ferrule 10 MFD conversion optical fiber 11,12 Optical fiber 12a Diameter expansion part 13 Connection part 100 MFD conversion adapter

Claims (1)

一端面におけるモードフィールド径と他端面におけるモードフィールド径とが異なり且つモードフィールド径の変化が滑らかであるＭＦＤ変換光ファイバと、一端側に第１コネクタ部を有し他端側に第２コネクタ部を有するハウジングと、前記第１コネクタ部から前記第２コネクタ部に渡って貫通すると共に前記ＭＦＤ変換光ファイバが挿入されたフェルールとを具備したことを特徴とするＭＦＤ変換アダプタ。   An MFD conversion optical fiber in which the mode field diameter at the one end surface is different from the mode field diameter at the other end surface and the change in the mode field diameter is smooth, and the second connector portion at the other end side having the first connector portion An MFD conversion adapter, comprising: a housing having a first and second ferrules penetrating from the first connector portion to the second connector portion and having the MFD conversion optical fiber inserted therein.
JP2004205859A 2004-07-13 2004-07-13 Mfd converting adapter Pending JP2006030366A (en)

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Cited By (4)

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JP2016128900A (en) * 2014-12-26 2016-07-14 Toto株式会社 Optical receptacle and optical transceiver
WO2018003940A1 (en) * 2016-06-29 2018-01-04 Toto株式会社 Optical receptacle and optical transceiver
JP2018010292A (en) * 2016-06-29 2018-01-18 Toto株式会社 Optical Receptacle and Optical Transceiver

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2016104653A1 (en) * 2014-12-26 2016-06-30 Toto株式会社 Optical receptacle and optical transceiver
JP2016128900A (en) * 2014-12-26 2016-07-14 Toto株式会社 Optical receptacle and optical transceiver
CN107003488A (en) * 2014-12-26 2017-08-01 Toto株式会社 Optical receptacle and optical transceiver
US10180546B2 (en) 2014-12-26 2019-01-15 Toto Ltd. Optical receptacle and optical transceiver
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JP2018010292A (en) * 2016-06-29 2018-01-18 Toto株式会社 Optical Receptacle and Optical Transceiver
JP2018136551A (en) * 2016-06-29 2018-08-30 Toto株式会社 Optical Receptacle and Optical Transceiver
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