JPH0614943U - Optical fiber connection status tester by connecting empty line - Google Patents
Optical fiber connection status tester by connecting empty lineInfo
- Publication number
- JPH0614943U JPH0614943U JP5733092U JP5733092U JPH0614943U JP H0614943 U JPH0614943 U JP H0614943U JP 5733092 U JP5733092 U JP 5733092U JP 5733092 U JP5733092 U JP 5733092U JP H0614943 U JPH0614943 U JP H0614943U
- Authority
- JP
- Japan
- Prior art keywords
- terminal
- optical fiber
- optical
- switch
- optical switch
- 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.)
- Granted
Links
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- Testing Of Optical Devices Or Fibers (AREA)
Abstract
(57)【要約】
【目的】 試験する光ファイバ４の受端付近の接続状態
を確実に試験する。
【構成】 光スイッチ３は端局２の出力が端子３Ａに接
続され、光ファイバ４の始端が端子３Ｂに接続され、Ｏ
ＴＤＲ１の出力が端子３Ｃに接続される。光スイッチ５
は光ファイバ４の終端が端子５Ａに接続され、端局６の
入力が端子５Ｂに接続され、端子５Ｃに空回線の光ファ
イバ７が接続される。端局２と端局６間で光通信をする
ときは、光スイッチ３の端子３Ａと端子３Ｂを接にし、
光スイッチ５の端子５Ａと端子５Ｂを接にする。端局２
と端局６間の光通信を断にするときは、光スイッチ３の
端子３Ｂと端子３Ｃを接にし、光スイッチ５の端子５Ａ
と端子５Ｃを接にして光ファイバ４に光ファイバ７を接
続し、光ファイバ４と光ファイバ７による反射光パルス
のレベルをＯＴＤＲ１で測定し、光ファイバ４の接続状
態を検査する。
(57) [Summary] [Purpose] To reliably test the connection state near the receiving end of the optical fiber 4 to be tested. [Structure] In the optical switch 3, the output of the terminal station 2 is connected to a terminal 3A, and the starting end of an optical fiber 4 is connected to a terminal 3B.
The output of TDR1 is connected to terminal 3C. Optical switch 5
The terminal of the optical fiber 4 is connected to the terminal 5A, the input of the terminal station 6 is connected to the terminal 5B, and the optical fiber 7 of the empty line is connected to the terminal 5C. When optical communication is performed between the terminal station 2 and the terminal station 6, the terminals 3A and 3B of the optical switch 3 are connected to each other,
The terminals 5A and 5B of the optical switch 5 are brought into contact with each other. Terminal 2
When disconnecting the optical communication between the terminal station 6 and the terminal station 6, the terminals 3B and 3C of the optical switch 3 are connected to each other, and the terminal 5A of the optical switch 5 is connected.
The optical fiber 7 is connected to the optical fiber 4 with the terminal 5C in contact with the optical fiber 4, and the level of the optical pulse reflected by the optical fiber 4 and the optical fiber 7 is measured by the OTDR 1 to check the connection state of the optical fiber 4.
Description
【０００１】[0001]
この考案は、端局間に布設された光ファイバの接続状態を試験する場合、空回 線の光ファイバを試験する光ファイバに接続し、試験する光ファイバの接続状態 を試験する装置についてのものである。 This invention relates to an apparatus for testing the connection state of an optical fiber to be tested by connecting an empty optical fiber to the optical fiber to be tested when testing the connection state of the optical fiber laid between terminal stations. Is.
【０００２】[0002]
次に、従来技術による光パルス試験器（以下、ＯＴＤＲという。）の構成を図 ３により説明する。図３の１Ａは光源、１Ｂは光方向性結合器、４は測定される 光ファイバ、１Ｃは光検出器、１Ｄは表示部である。なお、図３の構成は特公昭 62-53062号公報の第１図と同じものである。 Next, the configuration of a conventional optical pulse tester (hereinafter referred to as OTDR) will be described with reference to FIG. In FIG. 3, 1A is a light source, 1B is an optical directional coupler, 4 is an optical fiber to be measured, 1C is a photodetector, and 1D is a display unit. The configuration of FIG. 3 is the same as that of FIG. 1 of Japanese Patent Publication No. 62-53062.
【０００３】 次に、図３の表示部１Ｄに表示される反射波形を図４により説明する。図４の 左側が光ファイバ４の始端の状態を示し、右側に進むにつれて反射波形は減衰す る。なお、図４は特公昭62-53062号公報の第２図と同じものである。例えば、光 ファイバ４が10kmのとき、光ファイバ４により5dB 程度の減衰を受ける。Next, the reflection waveform displayed on the display unit 1D of FIG. 3 will be described with reference to FIG. The left side of FIG. 4 shows the state of the start end of the optical fiber 4, and the reflected waveform is attenuated as it goes to the right side. Incidentally, FIG. 4 is the same as FIG. 2 of Japanese Patent Publication No. 62-53062. For example, when the optical fiber 4 is 10 km, it is attenuated by about 5 dB by the optical fiber 4.
【０００４】[0004]
図３のＯＴＤＲにより端局間に布設された光ファイバ４に光パルスを送り、反 射光により端局間の接続状態を試験する場合、受端付近の反射光パルスでは、受 端付近の光ファイバ４の断線による反射光パルスかどうかを識別することができ ないことがある。この考案は、端局間に布設された光ファイバの接続状態を試験 する場合、空回線の光ファイバを試験する光ファイバに接続し、試験する光ファ イバと接続された空回線の光ファイバにＯＴＤＲの光パルスを入射し、試験する 光ファイバと接続された空回線の光ファイバからの反射光を測定することにより 、試験する光ファイバの受端付近の接続状態を確実に試験する装置の提供を目的 とする。 When an optical pulse is sent to the optical fiber 4 installed between the end stations by the OTDR of Fig. 3 and the connection state between the end stations is tested by reflection light, the reflected optical pulse near the receiving end is the optical fiber near the receiving end. It may not be possible to identify whether the pulse is a reflected light pulse due to the disconnection of 4. In this invention, when testing the connection condition of the optical fiber laid between the terminal stations, the optical fiber of the empty line is connected to the optical fiber to be tested, and the optical fiber of the empty line connected to the optical fiber to be tested is connected. Providing a device that reliably tests the connection state near the receiving end of the optical fiber to be tested by measuring the reflected light from the optical fiber of the empty line connected to the optical fiber to be tested by injecting the OTDR optical pulse With the goal.
【０００５】[0005]
この目的を達成するため、この考案では、光パルス１１を出射するＯＴＤＲ１ と、光パルス１１を出射するＯＴＤＲ１と、端局２の出力が端子３Ａに接続され 、光ファイバ４の始端が端子３Ｂに接続され、ＯＴＤＲ１の出力が端子３Ｃに接 続される光スイッチ３と、光ファイバ４の終端が端子５Ａに接続され、端局６の 入力が端子５Ｂに接続され、端子５Ｃに空回線の光ファイバ７が接続される光ス イッチ５とを備え、端局２と端局６間で光通信をするときは、光スイッチ３の端 子３Ａと端子３Ｂを接にし、光スイッチ５の端子５Ａと端子５Ｂを接にし、端局 ２と端局６間の光通信を断にするときは、光スイッチ３の端子３Ｂと端子３Ｃを 接にし、光スイッチ５の端子５Ａと端子５Ｃを接にして光ファイバ４に光ファイ バ７を接続し、光ファイバ４と光ファイバ７による反射光パルスのレベルをＯＴ ＤＲ１で測定し、光ファイバ４の接続状態を検査する。 In order to achieve this object, in this invention, the OTDR1 for emitting the optical pulse 11, the OTDR1 for emitting the optical pulse 11, and the output of the terminal 2 are connected to the terminal 3A, and the start end of the optical fiber 4 is connected to the terminal 3B. The optical switch 3 is connected and the output of the OTDR 1 is connected to the terminal 3C, the end of the optical fiber 4 is connected to the terminal 5A, the input of the terminal station 6 is connected to the terminal 5B, and the optical fiber of the empty line is connected to the terminal 5C. An optical switch 5 to which a fiber 7 is connected is provided, and when optical communication is performed between the terminal station 2 and the terminal station 6, the terminal 3A of the optical switch 3 and the terminal 3B are in contact with each other, and the terminal 5A of the optical switch 5 is connected. When the optical communication between the terminal 2 and the terminal 6 is cut off, the terminals 3B and 3C of the optical switch 3 are connected, and the terminals 5A and 5C of the optical switch 5 are connected. Connect the optical fiber 7 to the optical fiber 4, The level of the reflected light pulse by fiber 4 and the optical fiber 7 as measured with OT DR1, to inspect the connection state of the optical fiber 4.
【０００６】[0006]
次に、この考案による光ファイバ接続状態試験装置の構成を図１により説明す る。図１の１はＯＴＤＲ、２は端局、３は光スイッチ、４と７は光ファイバ、５ は光スイッチ、６は端局である。 Next, the configuration of the optical fiber connection state testing device according to the present invention will be described with reference to FIG. In FIG. 1, 1 is an OTDR, 2 is a terminal station, 3 is an optical switch, 4 and 7 are optical fibers, 5 is an optical switch, and 6 is a terminal station.
【０００７】 端局２は光スイッチ３の端子３Ａに接続され、ＯＴＤＲ１の光パルス１１は光 スイッチ３の端子３Ｃに接続される。光ファイバ４の始端は光スイッチ３の端子 ３Ｂに接続され、光ファイバ４の終端は光スイッチ５の端子５Ａに接続される。 光スイッチ５の端子５Ｂに端局６が接続され、光スイッチ５の端子５Ｃに空回線 の光ファイバ７が接続される。The terminal station 2 is connected to the terminal 3 A of the optical switch 3, and the optical pulse 11 of the OTDR 1 is connected to the terminal 3 C of the optical switch 3. The starting end of the optical fiber 4 is connected to the terminal 3B of the optical switch 3, and the ending end of the optical fiber 4 is connected to the terminal 5A of the optical switch 5. The terminal station 6 is connected to the terminal 5B of the optical switch 5, and the optical fiber 7 of the empty line is connected to the terminal 5C of the optical switch 5.
【０００８】 図１の端局２・６の間で光通信をするときは、光スイッチ３の端子３Ａ・３Ｂ を接にし、光スイッチ５の端子５Ａ・５Ｂを接にする。これにより、ＯＴＤＲ１ と光ファイバ７は切り離され、端局２・６間が光ファイバ４で接続される。端局 ２・６間の光通信を断にするときは、光スイッチ３の端子３Ｂ・３Ｃを接にし、 光スイッチ５の端子５Ａ・５Ｃを接にする。これにより、端局２・６が光ファイ バ４から切り離され、ＯＴＤＲ１と光ファイバ７が光ファイバ４に接続される。 ＯＴＤＲ１から光パルス１１を光ファイバ４に入射すると、光ファイバ４と光フ ァイバ７による反射光パルスのレベルがＯＴＤＲ１で測定される。これにより、 光ファイバ４の端局６付近の接続状態を検査することができる。When optical communication is performed between the terminal stations 2 and 6 in FIG. 1, the terminals 3A and 3B of the optical switch 3 are in contact with each other, and the terminals 5A and 5B of the optical switch 5 are in contact with each other. As a result, the OTDR 1 and the optical fiber 7 are separated, and the terminal stations 2 and 6 are connected by the optical fiber 4. When disconnecting the optical communication between the terminal stations 2 and 6, the terminals 3B and 3C of the optical switch 3 are connected and the terminals 5A and 5C of the optical switch 5 are connected. As a result, the terminal stations 2 and 6 are separated from the optical fiber 4, and the OTDR 1 and the optical fiber 7 are connected to the optical fiber 4. When the optical pulse 11 is incident on the optical fiber 4 from the OTDR 1, the level of the optical pulse reflected by the optical fiber 4 and the optical fiber 7 is measured by the OTDR 1. Thereby, the connection state of the optical fiber 4 near the terminal station 6 can be inspected.
【０００９】 次に、図１の波形図を図２により説明する。図４の２３は始端による反射光パ ルス１３のレベルであり、図４の２４は光ファイバ７の終端による反射光パルス １４のレベルである。図４のレベル２３・２４の間にレベル２５〜２７が現れる が、これらは光ファイバ７の接続点や２次反射光などである。レベル２４が観測 されることにより、端局２・６間の光ファイバ４の接続状態を確認することがで きる。Next, the waveform diagram of FIG. 1 will be described with reference to FIG. Reference numeral 23 in FIG. 4 is the level of the reflected light pulse 13 at the start end, and 24 in FIG. 4 is the level of the reflected light pulse 14 at the end of the optical fiber 7. Levels 25 to 27 appear between levels 23 and 24 in FIG. 4, but these are the connection points of the optical fiber 7 and secondary reflected light. By observing the level 24, the connection state of the optical fiber 4 between the terminal stations 2 and 6 can be confirmed.
【００１０】[0010]
この考案によれば、端局間に布設された光ファイバの接続状態を試験する場合 、空回線の光ファイバを試験する光ファイバに接続し、試験する光ファイバと接 続された空回線の光ファイバにＯＴＤＲの光パルスを入射し、試験する光ファイ バと接続された空回線の光ファイバからの反射光を測定することにより、試験す する光ファイバの接続状態を確実に試験することができる。 According to this invention, when the connection state of the optical fiber laid between the terminal stations is tested, the optical fiber of the empty line is connected to the optical fiber to be tested, and the optical fiber of the empty line connected to the optical fiber to be tested is connected. By injecting an OTDR optical pulse into the fiber and measuring the reflected light from the optical fiber of the empty line connected to the optical fiber to be tested, it is possible to reliably test the connection state of the optical fiber to be tested. .
【図１】この考案による光ファイバ減衰量測定装置の構
成図である。FIG. 1 is a block diagram of an optical fiber attenuation measuring device according to the present invention.
【図２】図１の波形図である。FIG. 2 is a waveform diagram of FIG.
【図３】従来技術によるＯＴＤＲの構成図である。FIG. 3 is a block diagram of a conventional OTDR.
【図４】図３の波形図である。FIG. 4 is a waveform diagram of FIG.
１ ＯＴＤＲ（光パルス試験器） ２ 端局 ３ 光スイッチ ４ 光ファイバ ５ 光スイッチ ６ 端局 ７ 光ファイバ 1 OTDR (Optical pulse tester) 2 Terminal station 3 Optical switch 4 Optical fiber 5 Optical switch 6 Terminal station 7 Optical fiber
フロントページの続き (72)考案者 跡部 直之 東京都千代田区内幸町一丁目１番６号 日 本電信電話株式会社内 (72)考案者 有居 正仁 東京都千代田区内幸町一丁目１番６号 日 本電信電話株式会社内 (72)考案者 鈴木 秀喜 東京都千代田区内幸町一丁目１番６号 日 本電信電話株式会社内Front page continuation (72) Inventor Naoyuki Atobe 1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corp. (72) Masahito Arii 1-6, Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corp. (72) Hideki Suzuki, 1-1-6 Uchisaiwaicho, Chiyoda-ku, Tokyo Nihon Telegraph and Telephone Corp.
Claims (1)
(1) と、 第１の端局(2) の出力が第１の端子(3A)に接続され、第
１の光ファイバ(4) の始端が第２の端子(3B)に接続さ
れ、光パルス試験器(1) の出力が第３の端子(3C)に接続
される第１の光スイッチ(3) と、 第１の光ファイバ(4) の終端が第４の端子(5A)に接続さ
れ、第２の端局(6) の入力が第５の端子(5B)に接続さ
れ、第６の端子(5C)に空回線の第２の光ファイバ(7) に
接続される第２の光スイッチ(5) とを備え、 第１の端局(2) と第２の端局(6) 間で光通信をするとき
は、第１の光スイッチ(3) の第１の端子(3A)と第２の端
子(3B)を接にし、第２の光スイッチ(5) の第４の端子(5
A)と第５の端子(5B)を接にし、 第１の端局(2) と第２の端局(6) 間の光通信を断にする
ときは、第１の光スイッチ(3) の第２の端子(3B)と第３
の端子(3C)を接にし、第２の光スイッチ(5) の第４の端
子(5A)と第６の端子(5C)を接にして第１の光ファイバ
(4) に第２の光ファイバ(7) を接続し、第１の光ファイ
バ(4) と第２の光ファイバ(7) による反射光パルスのレ
ベルを光パルス試験器(1) で測定し、第１の光ファイバ
(4) の接続状態を検査する空回線の接続による光ファイ
バ接続状態試験装置。1. An optical pulse tester for emitting an optical pulse (11)
(1), the output of the first terminal (2) is connected to the first terminal (3A), the beginning of the first optical fiber (4) is connected to the second terminal (3B), The output of the pulse tester (1) is connected to the third terminal (3C), the first optical switch (3), and the end of the first optical fiber (4) is connected to the fourth terminal (5A). The input of the second terminal (6) is connected to the fifth terminal (5B), and the sixth terminal (5C) is connected to the second optical fiber (7) of the empty line. An optical switch (5) is provided, and when performing optical communication between the first terminal station (2) and the second terminal station (6), the first terminal (3A) of the first optical switch (3) ) And the second terminal (3B) are connected, and the fourth terminal (5) of the second optical switch (5)
When the optical communication between the first terminal station (2) and the second terminal station (6) is cut off by connecting A) to the fifth terminal (5B), the first optical switch (3) Second terminal (3B) and third
Of the second optical switch (5) to the fourth terminal (5A) and the sixth terminal (5C) of the first optical fiber
Connect the second optical fiber (7) to (4), and measure the level of the optical pulse reflected by the first optical fiber (4) and the second optical fiber (7) with the optical pulse tester (1). , The first optical fiber
An optical fiber connection status tester that checks the connection status of (4) by connecting an empty line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1992057330U JP2573628Y2 (en) | 1992-07-23 | 1992-07-23 | Optical fiber connection status test equipment by connecting an empty line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1992057330U JP2573628Y2 (en) | 1992-07-23 | 1992-07-23 | Optical fiber connection status test equipment by connecting an empty line |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0614943U true JPH0614943U (en) | 1994-02-25 |
| JP2573628Y2 JP2573628Y2 (en) | 1998-06-04 |
Family
ID=13052566
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1992057330U Expired - Fee Related JP2573628Y2 (en) | 1992-07-23 | 1992-07-23 | Optical fiber connection status test equipment by connecting an empty line |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2573628Y2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09189639A (en) * | 1995-11-07 | 1997-07-22 | Sumiden Opcom Kk | System function test method in optical multiplex transmission system, and light switch for system function test |
| JP2018072281A (en) * | 2016-11-04 | 2018-05-10 | 日立金属株式会社 | Optical fiber monitoring system |
-
1992
- 1992-07-23 JP JP1992057330U patent/JP2573628Y2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH09189639A (en) * | 1995-11-07 | 1997-07-22 | Sumiden Opcom Kk | System function test method in optical multiplex transmission system, and light switch for system function test |
| JP2018072281A (en) * | 2016-11-04 | 2018-05-10 | 日立金属株式会社 | Optical fiber monitoring system |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2573628Y2 (en) | 1998-06-04 |
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