JPS6210935A - Light attenuator provided with input output power indication - Google Patents
Light attenuator provided with input output power indicationInfo
- Publication number
- JPS6210935A JPS6210935A JP60148228A JP14822885A JPS6210935A JP S6210935 A JPS6210935 A JP S6210935A JP 60148228 A JP60148228 A JP 60148228A JP 14822885 A JP14822885 A JP 14822885A JP S6210935 A JPS6210935 A JP S6210935A
- Authority
- JP
- Japan
- Prior art keywords
- light
- optical
- input
- output
- power
- 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
Landscapes
- Monitoring And Testing Of Transmission In General (AREA)
- Optical Communication System (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、光伝送装置の測定等に利用する、光減衰器に
関するものである。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an optical attenuator used for measurements of optical transmission equipment.
（従来の技術）
従来の光減衰器の構成を、第２図に示すブロック図を参
照して説明する。第２図において、光減衰器１の光入力
端子２に入力された入力光パワーは、減衰量可変ダイヤ
ル３によって濃度を変化させられるフィルタ４を通過し
て光パワーを所定値に減衰させられ、光出力端子５から
出力され、光コードで接続された光受信器等の性能測定
に使用される。(Prior Art) The configuration of a conventional optical attenuator will be explained with reference to the block diagram shown in FIG. In FIG. 2, the input optical power input to the optical input terminal 2 of the optical attenuator 1 passes through a filter 4 whose concentration is changed by an attenuation variable dial 3, and the optical power is attenuated to a predetermined value. The signal is output from the optical output terminal 5 and is used to measure the performance of an optical receiver or the like connected by an optical cord.
（発明が解決しようとする問題点）
しかしながら、前記従来の光減衰器では、光出力端子の
光パワーを被測定物の光受信器等へ光コードで接続して
使用する場合に、前記被測定物の入力光パワーの値を確
認するために、前記光コードを外してパワーメータで測
定する必要があり、受光パワーを変化させて被測定物の
性能を測定するためには、何回も光コードを外してパワ
ーメータに接続して光パワーを設定する必要があった。(Problems to be Solved by the Invention) However, in the conventional optical attenuator, when the optical power of the optical output terminal is connected to the optical receiver of the measured object using an optical cord, the In order to check the value of the input optical power of the object, it is necessary to remove the optical cord and measure it with a power meter. I had to disconnect the cord and connect it to a power meter to set the optical power.
また、減衰量可変ダイヤルの目盛が光減衰量を正確に対
応すれば、光減衰器の入力光パワーを一定にして、前記
減衰量可変ダイヤルの目盛を操作することにより、前記
光減衰器の出力光パワーを設定することができるが、前
記可変ダイヤルの目盛と光減衰量とを正確に対応させる
ことは困難であるとともに、測定中に前記光減衰器の入
力光パワーが変動すると、前記光減衰器の出力光パワー
の設定値も、表示されないまま変動して、正確な測定が
できないという問題点があった。Furthermore, if the scale of the variable attenuation dial accurately corresponds to the amount of optical attenuation, the output of the optical attenuator can be adjusted by keeping the input optical power of the optical attenuator constant and operating the scale of the variable attenuation dial. Although the optical power can be set, it is difficult to accurately match the scale of the variable dial with the amount of optical attenuation, and if the input optical power of the optical attenuator changes during measurement, the optical attenuation will change. There was also a problem in that the set value of the output optical power of the device fluctuated without being displayed, making accurate measurement impossible.
（問題点を解決するための手段）
本発明は、前記問題点を解決するために、光減衰器のフ
ィルタの前後に光分岐器を設けて、分岐された前記光分
岐器の入力および出力光パワーの一部を受光素子に受光
させて、前記入力および出力光パワーを算出表示すると
ともに、前記入力および出力光パワーの算出値を対数変
換し、前記対数変換した値の差によって光減衰量を表示
する装置を提供するものである。(Means for Solving the Problems) In order to solve the above problems, the present invention provides an optical branching device before and after the filter of an optical attenuator, so that the input and output lights of the optical branching device are split. A part of the power is received by a light receiving element, the input and output optical powers are calculated and displayed, and the calculated values of the input and output optical powers are logarithmically converted, and the amount of optical attenuation is determined by the difference between the logarithmically converted values. The present invention provides a display device.
（作 用）
本発明によれば、使用中の光減衰器の入力および出力光
パワーの一部を、光分岐器で抽出して検出することによ
り、前記光減衰器の入力および出力光パワーの量、更に
、前記光減衰器の光減衰量を連続的に表示してモニタす
ることができる。(Function) According to the present invention, by extracting and detecting a part of the input and output optical power of the optical attenuator in use with the optical splitter, the input and output optical power of the optical attenuator can be adjusted. In addition, the amount of optical attenuation of the optical attenuator can be continuously displayed and monitored.
（実施例）
本発明による光減衰器の構成を、第１図に示すブロック
図を参照して説明する。第１図において、光減衰器１の
光入力端子２に入力された入力光パワーは、光分岐器６
により２つに分岐される。一方の分岐光は、受光素子７
に受光されて電流に変換され、光入力パワー算出表示部
８は、前記光分岐器６の光分岐比と前記電流値を算出し
て、前記入力光パワーの量を表示する。他方の分岐光は
、減衰量可変ダイヤル３によって通過損失が設定される
フィルタ４を通った後、第２の光分岐器９により２つに
分岐される。一方の分岐光は光出力端子５から出力され
る。他方の分岐光は、第２の受光素子１２に受光されて
電流に変換され、光出力パワー算出表示部１０は、前記
第２の光分岐器９の光分岐比と前記電流値を算出して、
前記出力光パワーの量を表示する。すなわち、前記構成
により、入力および出力光パワーは連続的にモニタされ
る。(Example) The configuration of an optical attenuator according to the present invention will be explained with reference to the block diagram shown in FIG. In FIG. 1, the input optical power input to the optical input terminal 2 of the optical attenuator 1 is
It is divided into two parts. One branched light is transmitted to the light receiving element 7
The optical input power calculation display unit 8 calculates the optical branching ratio of the optical splitter 6 and the current value, and displays the amount of the input optical power. The other branched light passes through a filter 4 whose passage loss is set by a variable attenuation dial 3, and then is branched into two by a second optical splitter 9. One branched light is output from the optical output terminal 5. The other branched light is received by the second light receiving element 12 and converted into a current, and the optical output power calculation display section 10 calculates the optical branching ratio of the second optical splitter 9 and the current value. ,
The amount of the output optical power is displayed. That is, with the above configuration, input and output optical powers are continuously monitored.
さらに、前記受光素子７および第２の受光素子１２の電
流値を光減衰量算出表示部１１に入力し、それぞれの電
流値を対数変換してその差を算出することにより、光減
衰器の光減衰量を表示することができる。Furthermore, the current values of the light receiving element 7 and the second light receiving element 12 are input to the light attenuation amount calculation display section 11, and the respective current values are logarithmically converted and the difference is calculated. The amount of attenuation can be displayed.
（発明の効果）
本発明によれば、前記のように、光減衰器の入力および
出力光パワーを連続的にモニタするとともに、光減衰器
の光減衰量を確実容易に変更することができるので、光
受信器等の被測定物の入力光パワーの設定を容易に変更
して、前記被測定物の性能を確実に測定することができ
る。また、光減衰器の入力パワーが変動したために、被
測定物の入力光パワーが変動したときは、光減衰量可変
ダイヤルを操作することにより、容易に前記被測定物の
入力光パワーを一定に保持し、測定の誤りを未然に防ぐ
ことができるという効果がある。(Effects of the Invention) According to the present invention, as described above, the input and output optical powers of the optical attenuator can be continuously monitored, and the amount of optical attenuation of the optical attenuator can be reliably and easily changed. The performance of the device under test can be reliably measured by easily changing the setting of the input optical power of the device under test, such as an optical receiver. In addition, when the input optical power of the DUT changes due to fluctuations in the input power of the optical attenuator, the input optical power of the DUT can be easily kept constant by operating the optical attenuation variable dial. This has the effect of preventing measurement errors.
第１図は本発明の入出力パワー表示器付き光減衰器の一
実施例におけるブロック図、第２図は従来の光減衰器の
ブロック図を示すものである。
１ ・・・光減衰器、 ２・・・光入力端子、 ３ ・
・・減衰量可変ダイヤル、 ４・・・フィルタ、 ５・
・・光出力端子、 ６・・・光分岐器、 ７・・・受光
素子、 ８・・・光入力パワー算出表示部。
９ ・・・第２の光分岐器、１０・・・光出力パワー算
出表示部、１１・・・光減衰量算出表示部、１２・・・
第２の受光素子。
特許出願人 松下電器産業株式会社
＝６−
第１図 １児威＃、脣
第２図FIG. 1 is a block diagram of an embodiment of an optical attenuator with an input/output power indicator according to the present invention, and FIG. 2 is a block diagram of a conventional optical attenuator. 1... Optical attenuator, 2... Optical input terminal, 3.
...attenuation variable dial, 4...filter, 5.
...Optical output terminal, 6.. Optical splitter, 7.. Light receiving element, 8.. Optical input power calculation display unit. 9... Second optical splitter, 10... Optical output power calculation display section, 11... Optical attenuation amount calculation display section, 12...
Second light receiving element. Patent applicant: Matsushita Electric Industrial Co., Ltd.
Claims (2)
分岐する分岐器と、前記分岐器の片方の出力光を受光し
て電流に変換する受光素子と、前記受光素子に流れる電
流値により前記光入力端子の入力光パワーを算出表示す
る電子回路と、前記光分岐器の他方の出力光パワーを減
衰させるフィルタと、前記フィルタの出力光を所定の分
岐比で分岐する第２の光分岐器と、前記第２の光分岐器
の片方の出力光を外部に取り出す光出力端子と、前記第
２の光分岐器の他方の出力光を受光して電流に変換する
第２の受光素子と、前記第２の受光素子に流れる電流値
により前記光出力端子の出力光パワーを算出表示する電
子回路とにより構成されたことを特徴とする入出力パワ
ー表示付き光減衰器。(1) A splitter that branches the light input from the optical input terminal at a predetermined branching ratio, a light receiving element that receives the output light from one side of the splitter and converts it into a current, and a current that flows through the light receiving element. an electronic circuit that calculates and displays the input optical power of the optical input terminal based on a value; a filter that attenuates the output optical power of the other of the optical splitters; and a second filter that branches the output light of the filter at a predetermined branching ratio. an optical splitter, an optical output terminal that takes out one output light of the second optical splitter to the outside, and a second light receiver that receives the other output light of the second optical splitter and converts it into an electric current. 1. An optical attenuator with an input/output power display, characterized in that it is constituted by an element and an electronic circuit that calculates and displays the output optical power of the optical output terminal based on the current value flowing through the second light receiving element.
ることを特徴とする特許請求の範囲第（１）項記載の入
出力パワー表示付き光減衰器。(2) The optical attenuator with an input/output power display according to claim (1), wherein the input/output power is logarithmically converted and the difference thereof is calculated and displayed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60148228A JPS6210935A (en) | 1985-07-08 | 1985-07-08 | Light attenuator provided with input output power indication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60148228A JPS6210935A (en) | 1985-07-08 | 1985-07-08 | Light attenuator provided with input output power indication |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS6210935A true JPS6210935A (en) | 1987-01-19 |
Family
ID=15448140
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60148228A Pending JPS6210935A (en) | 1985-07-08 | 1985-07-08 | Light attenuator provided with input output power indication |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6210935A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5319733A (en) * | 1992-01-02 | 1994-06-07 | Adc Telecommunications, Inc. | Variable fiber optical attenuator |
| JPH08113340A (en) * | 1994-10-17 | 1996-05-07 | Yazaki Kako Kk | Power roller conveyer for light load |
| US5588087A (en) * | 1992-01-02 | 1996-12-24 | Adc Telecommunications, Inc. | Overlapping fusion attenuator |
| US5724149A (en) * | 1990-04-20 | 1998-03-03 | British Telecommunications Plc | Optical communication link fault signalling |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55158744A (en) * | 1979-05-28 | 1980-12-10 | Fujitsu Ltd | Light wavelength control system for optical multiplex communication system |
-
1985
- 1985-07-08 JP JP60148228A patent/JPS6210935A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS55158744A (en) * | 1979-05-28 | 1980-12-10 | Fujitsu Ltd | Light wavelength control system for optical multiplex communication system |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5724149A (en) * | 1990-04-20 | 1998-03-03 | British Telecommunications Plc | Optical communication link fault signalling |
| US5319733A (en) * | 1992-01-02 | 1994-06-07 | Adc Telecommunications, Inc. | Variable fiber optical attenuator |
| US5588087A (en) * | 1992-01-02 | 1996-12-24 | Adc Telecommunications, Inc. | Overlapping fusion attenuator |
| JPH08113340A (en) * | 1994-10-17 | 1996-05-07 | Yazaki Kako Kk | Power roller conveyer for light load |
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