JPS60220842A - Encounter testing device for optical fiber line - Google Patents

Encounter testing device for optical fiber line

Info

Publication number
JPS60220842A
JPS60220842A JP7784784A JP7784784A JPS60220842A JP S60220842 A JPS60220842 A JP S60220842A JP 7784784 A JP7784784 A JP 7784784A JP 7784784 A JP7784784 A JP 7784784A JP S60220842 A JPS60220842 A JP S60220842A
Authority
JP
Japan
Prior art keywords
optical fiber
container
encounter
light source
light
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP7784784A
Other languages
Japanese (ja)
Inventor
Yoshinori Hatano
羽田野 吉紀
Katsuya Yamashita
克也 山下
Yahei Oyamada
弥平 小山田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nippon Telegraph and Telephone Corp
Original Assignee
Nippon Telegraph and Telephone Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nippon Telegraph and Telephone Corp filed Critical Nippon Telegraph and Telephone Corp
Priority to JP7784784A priority Critical patent/JPS60220842A/en
Publication of JPS60220842A publication Critical patent/JPS60220842A/en
Pending legal-status Critical Current

Links

Classifications

    • GPHYSICS
    • G01MEASURING; TESTING
    • G01MTESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
    • G01M11/00Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
    • G01M11/30Testing of optical devices, constituted by fibre optics or optical waveguides
    • G01M11/35Testing of optical devices, constituted by fibre optics or optical waveguides in which light is transversely coupled into or out of the fibre or waveguide, e.g. using integrating spheres

Landscapes

  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Chemical & Material Sciences (AREA)
  • Analytical Chemistry (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Optical Devices Or Fibers (AREA)
  • Light Guides In General And Applications Therefor (AREA)

Abstract

PURPOSE:To make an encounter communication through one optical fiber by making a small bent of the optical fiber, covering the bend part with a container, and providing a light source which sends a signal and a photodetector which receives it in the container. CONSTITUTION:Small bends 24 are formed at two halfway points of the optical fiber 12, those parts are covered with container 20 respectively, and a photodetector 21 and a light source 22 are arranged in each container 20. Those photodetectors 21 are optoelectric converters, whose output electric signals are connected to reception terminals of transmitter receivers 23 respectively. The light sources 22 are electrooptic converters, whose electric signal inputs are connected to transmission terminals of the transmitter receivers 23 respectively. Handsets 13 is connected to the transmitter receivers 23 to allow a communication between those two positions, thereby making an encounter test.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、通信用光ファイバに光信号を結合分岐する装
置に関する。特に、光フアイバ線路の途中から光ファイ
バを切断することなく、出合い試験を行うために信号を
分岐結合する装置に関する。
DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an apparatus for coupling and branching optical signals to and from communication optical fibers. In particular, the present invention relates to a device for branching and coupling signals in order to perform a matching test without cutting the optical fiber from the middle of the optical fiber line.

〔従来の技術〕[Conventional technology]

出合い試験とは、互いに離れた作業地点で作業地点間の
回線を利用して打ち合わせをしながら、作業地点間の回
線について心線対照や伝送特性の測定を行う試験をいう
。この試験に用いる打ち合わせ用の装置は従来第6図の
ように構成されていた。
An encounter test is a test in which conductor comparisons and transmission characteristics of the lines between the work sites are measured while holding meetings at work sites that are far apart from each other using the lines between the work sites. The meeting equipment used in this test was conventionally constructed as shown in FIG.

すなわち、両地点にそれぞれ送話部10および受話部1
1を含む打ち合わせ用通信装置を配置し、空きの光ファ
イバ12を一対゛使用してその通信装置を接続し、送受
話器13より通話を行うものである。
That is, a transmitting section 10 and a receiving section 1 are installed at both points.
A communication device for a meeting including 1 is arranged, the communication device is connected using a pair of vacant optical fibers 12, and a telephone call is made using a handset 13.

この方法では、回線に空きがないときには出合い試験を
行うことができない。また、回線の端末でない途中から
出合い試験を行おうとすると、光ファイバを切断する必
要があり好ましくない。
With this method, the encounter test cannot be performed when there is no free line available. Furthermore, if an attempt is made to perform a meeting test from a point in the line that is not at the terminal, the optical fiber must be cut, which is undesirable.

〔発明が解決しようとする問題点〕[Problem that the invention seeks to solve]

本発明はこれを解決するもので、光ファイバの途中から
任意の位置で接続することができ、しかも、光ファイバ
を切断する必要がなく、原則として1本の光ファイバで
双方向に出合い通話を行う装置を提供することを目的と
する。
The present invention solves this problem by allowing connections to be made at any point in the middle of an optical fiber, and without the need to cut the optical fiber. The purpose is to provide a device that performs the following steps.

〔問題点を解決するための手段〕[Means for solving problems]

本発明は、光ファイバに小さい曲げを与え、この曲げを
与えた部分を容器で覆い、この容器内に信号を送信する
光源および信号を受信する受光器を配置することを特徴
とする。
The present invention is characterized in that the optical fiber is slightly bent, the bent portion is covered with a container, and a light source for transmitting a signal and a light receiver for receiving the signal are arranged inside the container.

〔作 用〕[For production]

光ファイバは小さい曲げを与えると、内部を伝搬してい
る光信号がコアとクラッドとの間で全反射の条件を満足
しなくなり、光信号の一部が外部に漏洩する。これを受
光器に受信するものである。
When an optical fiber is subjected to a small bend, the optical signal propagating inside the optical fiber no longer satisfies the condition of total internal reflection between the core and the cladding, and a portion of the optical signal leaks to the outside. This is received by a light receiver.

また漏洩する光は可逆的であるから、光源から光フアイ
バ内に光信号を結合することができる。
Also, since the leaked light is reversible, it is possible to couple optical signals from the light source into the optical fiber.

・この曲げの曲率は光ファイバを破損しない程度に選ば
れ(例えば曲率半径3鶴〜101111) 、結合減衰
量は30dB位が得られる。したがワて十分に出合い試
験を行うことができる。
- The curvature of this bending is selected so as not to damage the optical fiber (for example, the radius of curvature is 3 to 101111), and a coupling attenuation of about 30 dB can be obtained. However, it is possible to conduct a sufficient encounter test.

〔実施例〕〔Example〕

第1図は本発明実施例の構成図である。この例は、光フ
ァイバ12の途中の部分2箇所に、小さい曲げ24を与
え、この部分をそれぞれ容器20で覆い、この容器20
の中に受光器21および光源22を配置する。この受光
器21は光電気変換器で、その出力電気信号は送受信器
23の受信端子に接続される。光源21は電気光変換器
であって、その電気信号入力は、送受信23器の送信端
子に接続される。送受信器23には送受話器13が接続
され、この2箇所の間で通話を行い出合い試験を行う。
FIG. 1 is a block diagram of an embodiment of the present invention. In this example, small bends 24 are given to two parts in the middle of the optical fiber 12, each of these parts is covered with a container 20, and the container 20
A photoreceiver 21 and a light source 22 are placed inside. This light receiver 21 is a photoelectric converter, and its output electrical signal is connected to a receiving terminal of a transceiver 23. The light source 21 is an electro-optical converter, and its electrical signal input is connected to the transmission terminal of the transmitter/receiver 23. The handset 13 is connected to the transmitter/receiver 23, and a call is made between these two locations to conduct a meeting test.

容器20はその内面が鏡面に仕上げされ、光が反射する
ように構成される。
The container 20 has a mirror-finished inner surface and is configured to reflect light.

このような構成の装置では、曲げ24の部分で、光ファ
イバ12から光が漏洩し、また、容器の中の光が光ファ
イバ12に結合する。これは、曲げの部分で光フアイバ
コアを伝搬する光がクラッドとの間の反射角が大きくな
りすぎて、全反射の条件を満足しなくなったものが外部
に漏洩するためである。光の通路は全く可逆的なので、
送信および受信に使用できる。
In the device having such a configuration, light leaks from the optical fiber 12 at the bend 24, and light inside the container is coupled to the optical fiber 12. This is because the reflection angle between the light propagating through the optical fiber core and the cladding at the bent portion becomes too large, and the light that no longer satisfies the conditions for total reflection leaks to the outside. Since the path of light is completely reversible,
Can be used for sending and receiving.

このような無切断の結合には当然大きい損失を伴うが、
種々の実験の結果その損失は50〜25dB程度にする
ことができ、標準的には30dB程度の結合損失となる
。この程度の結合を行った後、光ファイバの曲げ24を
引き延ばしても、何ら損傷は発生せず光ファイバ12は
元の形に回復する。
Such an unbroken bond naturally involves a large loss, but
As a result of various experiments, the loss can be reduced to about 50 to 25 dB, and the standard coupling loss is about 30 dB. After this degree of coupling is achieved, even if the bend 24 of the optical fiber is stretched, no damage occurs and the optical fiber 12 recovers to its original shape.

第2図は本発明実施例装置容器の部分の構造図である。FIG. 2 is a structural diagram of a portion of a container of an apparatus according to an embodiment of the present invention.

この構造は容器20の内部にくり抜かれた空間があり、
この空間に3本のビン30が埋め込まれていて、このピ
ン30に光ファイバ12が引き掛けられる。この空間は
別のふたにより覆われる。このような構造により光ファ
イバに適当な曲げを与えることができ、容器20の内部
空間で受光器21および光源22と結合する。
This structure has a hollow space inside the container 20,
Three bottles 30 are embedded in this space, and the optical fibers 12 are hooked onto these pins 30. This space is covered by another lid. Such a structure allows the optical fiber to be appropriately bent, and is coupled to the light receiver 21 and the light source 22 in the interior space of the container 20.

第3図はさらに容器部分の別の構造図であり、この例は
容器20が二つの部材により構成され、ヒンジ25によ
り開閉自在になっている。ビン30は双方の部材にそれ
ぞれ配置され、光ファイバ12を間にはさみ二つの部材
を閉じると、光ファイバ12はこのピン30の間にはさ
まれて適当な曲げが与えられる。
FIG. 3 is another structural diagram of the container portion, and in this example, the container 20 is composed of two members, and can be opened and closed by a hinge 25. Bins 30 are placed on both members, and when the two members are closed with the optical fiber 12 sandwiched between them, the optical fiber 12 is sandwiched between the pins 30 and given an appropriate bend.

第4図は別の容器部分の構造例を示す図である。FIG. 4 is a diagram showing an example of the structure of another container portion.

第4図1a)は斜視図、同(b)は断面構造図である。FIG. 4(a) is a perspective view, and FIG. 4(b) is a cross-sectional structural view.

この例は光ファイバ12に曲げを与えるために別の部品
としてクリップ40を用意しておき、このクリップ40
を光ファイバ12にはさみ、容器20の中に収容するも
のである。クリップ40は透明な材質で形成され、スプ
リング力により光ファイバ12に曲げを与える構造であ
る。第4図では受光器および光源の記載を省略しである
In this example, a clip 40 is prepared as a separate component to bend the optical fiber 12, and this clip 40
is sandwiched between optical fibers 12 and housed in a container 20. The clip 40 is made of a transparent material and has a structure that bends the optical fiber 12 using a spring force. In FIG. 4, the description of the light receiver and the light source is omitted.

第5図はさらに別の容器部分の構造図である。FIG. 5 is a structural diagram of yet another container section.

この例は、容器20が二つの部材でできていて、それぞ
れ凹部50および凸部51があり、この二つの部材の間
に光ファイバ12をはさむことにより曲げが与えられる
。第5図+a)は斜視図、同[b)は断面図、同(C1
は光ファイバをはさんだ状態の断面図である。
In this example, the container 20 is made of two members, each having a concave portion 50 and a convex portion 51, and bending is imparted by sandwiching the optical fiber 12 between these two members. Figure 5 + a) is a perspective view, Figure 5 [b) is a sectional view, Figure 5 (C1
is a cross-sectional view of a state where an optical fiber is sandwiched.

この凹部50および凸部51は、透明な材質であり、こ
の凹部50または凸部51を介して光ファイバ12に光
を結合する。この凹部50および凸部51は適当な屈折
率の材料を選び、結合効率、を改善することができる。
The concave portion 50 and the convex portion 51 are made of a transparent material, and couple light to the optical fiber 12 via the concave portion 50 or the convex portion 51. The coupling efficiency can be improved by selecting a material having an appropriate refractive index for the concave portion 50 and the convex portion 51.

−例として透明変成シリコンである。- An example is transparent modified silicon.

上記例では、送受信信号が音声信号であるとしたが、音
声信号に限らず、測定装置のデータ信号その他であって
もよい。
In the above example, the transmitted/received signal is an audio signal, but it is not limited to an audio signal, but may be a data signal of a measuring device or the like.

〔発明の効果〕〔Effect of the invention〕

以上説明したように、本発明によれば簡便に光ファイバ
と出合い試験装置を接続できる。本発明では、回線に空
きがなくとも他に利用している回線を一時的に利用して
出合い試験を行うことができる。光ファイバを切断する
必要がなく、出合い試験完了後は光ファイバは元の形に
回復する。本発明の装置では、利用する光ファイバは原
則として1本で双方向に使用できる。
As explained above, according to the present invention, it is possible to easily connect an optical fiber and a matching test device. In the present invention, even if there is no free line, it is possible to temporarily use a line that is being used elsewhere to conduct a match test. There is no need to cut the optical fiber, and the optical fiber recovers to its original shape after the encounter test is completed. In the device of the present invention, only one optical fiber can be used in both directions, in principle.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は本発明実施例装置の構成図。 第2図は容器の構造例を示す図。 第3図、第4図および第5図はそれぞれ容器の別の構造
例を示す図。 第6図は従来例出合い試験の構成図。 特許出願人 日本電信電話公社 代理人 弁理士 井 出 直 孝 2 沼2図 地312 (a) (b) 鼠4 ロ (a) 尾5 口、
FIG. 1 is a configuration diagram of an apparatus according to an embodiment of the present invention. FIG. 2 is a diagram showing an example of the structure of the container. FIG. 3, FIG. 4, and FIG. 5 are diagrams each showing another example of the structure of the container. FIG. 6 is a configuration diagram of a conventional encounter test. Patent Applicant Nippon Telegraph and Telephone Public Corporation Agent Patent Attorney Naotaka Ide 2 Numa 2 Figure 312 (a) (b) Rat 4 B (a) Tail 5 Mouth;

Claims (1)

【特許請求の範囲】 +11 光ファイバの途中部分に被せられる容器と、こ
の容器の内部に配置され上記光ファイバに小さい曲げを
与える手段と、 上記容器の内部に配置された受光器と、上記容器の内部
に配置された光源と、 上記受光器の出力を受信入力とし上記光源に与える信号
を送信出力とする送受信器と を備えたことを特徴とする光フアイバ線路用出合い試験
装置。 (2)容器は内部が鏡面である特許請求の範囲第111
項に記載の光フアイバ線路用出合い試験装置。
[Scope of Claims] +11 A container that covers an intermediate portion of an optical fiber, a means arranged inside the container to give a small bend to the optical fiber, a light receiver arranged inside the container, and a receiver arranged inside the container. A contact testing device for an optical fiber line, comprising: a light source disposed inside the optical fiber line; and a transmitter/receiver whose reception input is the output of the light receiver and whose transmission output is a signal given to the light source. (2) The container has a mirror surface inside Claim 111
A meeting test device for optical fiber lines as described in 2.
JP7784784A 1984-04-18 1984-04-18 Encounter testing device for optical fiber line Pending JPS60220842A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7784784A JPS60220842A (en) 1984-04-18 1984-04-18 Encounter testing device for optical fiber line

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7784784A JPS60220842A (en) 1984-04-18 1984-04-18 Encounter testing device for optical fiber line

Publications (1)

Publication Number Publication Date
JPS60220842A true JPS60220842A (en) 1985-11-05

Family

ID=13645442

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7784784A Pending JPS60220842A (en) 1984-04-18 1984-04-18 Encounter testing device for optical fiber line

Country Status (1)

Country Link
JP (1) JPS60220842A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61258205A (en) * 1985-05-13 1986-11-15 Furukawa Electric Co Ltd:The Optical fiber bending device
JPH01250839A (en) * 1988-03-31 1989-10-05 Tokyo Electron Ltd Inspection equipment for liquid crystal display body
JPH02232545A (en) * 1989-03-07 1990-09-14 Kandenko Co Ltd Optical fiber core collator
EP0485849A2 (en) * 1990-11-13 1992-05-20 Siemens Aktiengesellschaft Measuring device for an optical medium using two emitters and two receivers

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS61258205A (en) * 1985-05-13 1986-11-15 Furukawa Electric Co Ltd:The Optical fiber bending device
JPH01250839A (en) * 1988-03-31 1989-10-05 Tokyo Electron Ltd Inspection equipment for liquid crystal display body
JPH02232545A (en) * 1989-03-07 1990-09-14 Kandenko Co Ltd Optical fiber core collator
EP0485849A2 (en) * 1990-11-13 1992-05-20 Siemens Aktiengesellschaft Measuring device for an optical medium using two emitters and two receivers

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