JPS58100733A - Measuring method for loss of optical fiber - Google Patents
Measuring method for loss of optical fiberInfo
- Publication number
- JPS58100733A JPS58100733A JP19853181A JP19853181A JPS58100733A JP S58100733 A JPS58100733 A JP S58100733A JP 19853181 A JP19853181 A JP 19853181A JP 19853181 A JP19853181 A JP 19853181A JP S58100733 A JPS58100733 A JP S58100733A
- Authority
- JP
- Japan
- Prior art keywords
- optical fiber
- light
- reflected
- optical
- receptacle
- 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
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M11/00—Testing of optical apparatus; Testing structures by optical methods not otherwise provided for
- G01M11/30—Testing of optical devices, constituted by fibre optics or optical waveguides
- G01M11/31—Testing of optical devices, constituted by fibre optics or optical waveguides with a light emitter and a light receiver being disposed at the same side of a fibre or waveguide end-face, e.g. reflectometers
Landscapes
- Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- General Physics & Mathematics (AREA)
- Investigating Or Analysing Materials By Optical Means (AREA)
- Testing Of Optical Devices Or Fibers (AREA)
Abstract
Description
【発明の詳細な説明】
本発明は、布設光フアイバケーブルの光フアイバ損失の
測定方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for measuring optical fiber loss in installed optical fiber cables.
従来の光７アイパ損失の測定法は、第１図のように標準
光源の光出力Ｐ、を測定した後、他端からの光出力Ｐ１
を測定してＩ、＝Ｐ。−Ｐ、 （ａ） から求めていた
うしかし、この方法では、標準光源Ｐ・を測定してから
Ｐｌを測定するまでに時間がかかり、Ｐ、光出力の時間
変動やゆらぎによる誤差が生じる。The conventional method for measuring optical loss is to measure the optical output P of the standard light source as shown in Figure 1, and then measure the optical output P1 from the other end.
Measure I,=P. -P, (a) However, with this method, it takes time to measure Pl after measuring the standard light source P, and errors occur due to time fluctuations and fluctuations in P and optical output.
又、パワーメータの移動にともなう振動が精度を劣下さ
せる恐れもある。Furthermore, vibrations caused by movement of the power meter may degrade accuracy.
本発明の目的は、上記のパワーメータ移動に必要な時間
を節約するとともにリアルタイムで光フアイバ損失を測
定する測定法を提供することにある。An object of the present invention is to provide a measurement method that saves the time required to move the power meter and measures optical fiber loss in real time.
パワーメータを移動させることなく元ファイバへ入射す
る光Ｐ０と出射する光Ｐ１を測定するかわりに全反射鏡
レセプタクルを出力端につけてその反射光から光フアイ
バ損失を測定できるように工夫した。Instead of measuring the light P0 entering the original fiber and the light P1 exiting the original fiber without moving the power meter, a total reflection mirror receptacle was attached to the output end so that the optical fiber loss could be measured from the reflected light.
以下、本発明の一実施例を第２図により説明する。１は
標準光源、２は光の伝搬モードを均一にするためのダミ
ーファイバ、６は光源からの光は軸方向に通し、反射光
は直角方向へ出す光方向性結合器である。６はパワーメ
ータである。光源から出た光は、１→２→６を通り７の
光コネクタへ出てくる。この光を８の全反射説レセプタ
クルで反射させてＰｏを測定する。・・・第２図（ａ）
次にこの７を４のレセプタクルを通して５の布設光フア
イバケーブルへ通し、その出口端で８の全反射鏡レセプ
タクルで反射させその時の反射パワーＰ、を測定する。An embodiment of the present invention will be described below with reference to FIG. 1 is a standard light source, 2 is a dummy fiber for making the propagation mode of light uniform, and 6 is an optical directional coupler that passes the light from the light source in the axial direction and outputs the reflected light in the perpendicular direction. 6 is a power meter. The light emitted from the light source passes through 1 → 2 → 6 and comes out to optical connector 7. This light is reflected by the total reflection theory receptacle 8 to measure Po. ...Fig. 2(a) Next, this cable 7 is passed through the receptacle 4 to the installed optical fiber cable 5, and reflected at the exit end by the total reflection mirror receptacle 8, and the reflected power P at that time is measured.
・・・第２図の）この時、区間光フアイバ損失りは
Ｌ ＝ （Ｐ、 −Ｐ、 ）／２ （ｄＢ、、）で求め
ることができる。. . . in Fig. 2) At this time, the section optical fiber loss can be determined by L = (P, -P, )/2 (dB, , ).
ダミーファイバを取り除き光源として光送信器を用いれ
ば、送信側のパワーと受信パワーが同時に測定できる。If the dummy fiber is removed and an optical transmitter is used as the light source, the transmitting power and receiving power can be measured simultaneously.
第１図は、従来の光フアイバケーブル損失測定法を示す
図、第２図は、本発明の測定法を示す図である。
１・・・標準光源 ２・・・ダミーファイバ３・
・・パワーメータ ４・・・レセプタクル５・・
・布設さｈた光フアイバケーブル６・・・光方向性結合
器
７・・・６の出力側光コネクタプラグ
８・・・全反射鏡レセプタクル
代理人弁理士 薄 １）利 幸
、＋？ １ 力
）＋２ 口FIG. 1 is a diagram showing a conventional optical fiber cable loss measurement method, and FIG. 2 is a diagram showing a measurement method according to the present invention. 1... Standard light source 2... Dummy fiber 3.
...Power meter 4...Receptacle 5...
・Layed optical fiber cable 6... Optical directional coupler 7... Output side optical connector plug 8 of 6... Total reflection mirror receptacle Patent attorney Susuki 1) Toshiyuki, +? 1 power) + 2 mouth
Claims (1)
をパワーメータで測定することによりパワーメータを固
定させたままで光フアイバケーブル損失を測定すること
を特徴とする光フアイバ損失測定法。t. An optical fiber loss measurement method using an optical directional coupler and measuring the optical fiber cable loss by measuring the reflected light reflected at the other end with a power meter while keeping the power meter fixed. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19853181A JPS58100733A (en) | 1981-12-11 | 1981-12-11 | Measuring method for loss of optical fiber |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP19853181A JPS58100733A (en) | 1981-12-11 | 1981-12-11 | Measuring method for loss of optical fiber |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58100733A true JPS58100733A (en) | 1983-06-15 |
Family
ID=16392689
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP19853181A Pending JPS58100733A (en) | 1981-12-11 | 1981-12-11 | Measuring method for loss of optical fiber |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58100733A (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2563627A1 (en) * | 1984-04-26 | 1985-10-31 | Buehler Ltd | METHOD AND APPARATUS FOR BACKLIGHTING OF OPTICAL CONNECTORS |
| US4838690A (en) * | 1988-04-12 | 1989-06-13 | Sumitomo Electric Fiber Optics Corporation | Simultaneous bi-directional optical time domain reflectometry method |
| US5331391A (en) * | 1992-06-16 | 1994-07-19 | Bukhshtab Mikhail A | Method of determining the optical loss in reflected radiation in a fibre-optic light guide |
| JPH0798415A (en) * | 1993-04-08 | 1995-04-11 | Koninkl Ptt Nederland Nv | Optical circuit of measuring system for measuring reflection sensitivity of light transmitting system |
| JPH08210948A (en) * | 1995-02-07 | 1996-08-20 | Kawasaki Heavy Ind Ltd | Optical fiber high-speed delivering test device |
| US5592284A (en) * | 1995-04-21 | 1997-01-07 | Nortech Fibronic Inc. | Single connection automated bi-directional fiberoptic attenuation measurement system |
| US5625450A (en) * | 1995-02-28 | 1997-04-29 | Ando Electric Co., Ltd. | Apparatus for measuring connection loss and reflection attenuation of optical fiber cord |
| WO1999044027A1 (en) * | 1998-02-28 | 1999-09-02 | Deutsche Telekom Ag | Measuring method for individual cable fibres |
| EP1462788A1 (en) * | 2003-03-28 | 2004-09-29 | Agilent Technologies Inc. a Delaware Corporation | Bidirectional optical loss measurement |
| CN103630331A (en) * | 2012-08-27 | 2014-03-12 | 上海光之虹光电通讯设备有限公司 | Multichannel optical fiber insertion and return loss tester and test calibration method |
-
1981
- 1981-12-11 JP JP19853181A patent/JPS58100733A/en active Pending
Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2563627A1 (en) * | 1984-04-26 | 1985-10-31 | Buehler Ltd | METHOD AND APPARATUS FOR BACKLIGHTING OF OPTICAL CONNECTORS |
| US4838690A (en) * | 1988-04-12 | 1989-06-13 | Sumitomo Electric Fiber Optics Corporation | Simultaneous bi-directional optical time domain reflectometry method |
| US5331391A (en) * | 1992-06-16 | 1994-07-19 | Bukhshtab Mikhail A | Method of determining the optical loss in reflected radiation in a fibre-optic light guide |
| JPH0798415A (en) * | 1993-04-08 | 1995-04-11 | Koninkl Ptt Nederland Nv | Optical circuit of measuring system for measuring reflection sensitivity of light transmitting system |
| JPH08210948A (en) * | 1995-02-07 | 1996-08-20 | Kawasaki Heavy Ind Ltd | Optical fiber high-speed delivering test device |
| US5625450A (en) * | 1995-02-28 | 1997-04-29 | Ando Electric Co., Ltd. | Apparatus for measuring connection loss and reflection attenuation of optical fiber cord |
| US5592284A (en) * | 1995-04-21 | 1997-01-07 | Nortech Fibronic Inc. | Single connection automated bi-directional fiberoptic attenuation measurement system |
| WO1999044027A1 (en) * | 1998-02-28 | 1999-09-02 | Deutsche Telekom Ag | Measuring method for individual cable fibres |
| US6924890B1 (en) | 1998-02-28 | 2005-08-02 | Deutsche Telekom Ag | Measuring method for individual fibers of cables |
| EP1462788A1 (en) * | 2003-03-28 | 2004-09-29 | Agilent Technologies Inc. a Delaware Corporation | Bidirectional optical loss measurement |
| CN103630331A (en) * | 2012-08-27 | 2014-03-12 | 上海光之虹光电通讯设备有限公司 | Multichannel optical fiber insertion and return loss tester and test calibration method |
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