JPH05322697A - Portable optical circuit checker - Google Patents
Portable optical circuit checkerInfo
- Publication number
- JPH05322697A JPH05322697A JP4127683A JP12768392A JPH05322697A JP H05322697 A JPH05322697 A JP H05322697A JP 4127683 A JP4127683 A JP 4127683A JP 12768392 A JP12768392 A JP 12768392A JP H05322697 A JPH05322697 A JP H05322697A
- Authority
- JP
- Japan
- Prior art keywords
- optical
- optical circuit
- signal
- circuit
- oscillator
- 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
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- Testing Of Optical Devices Or Fibers (AREA)
- Optical Communication System (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、光回路の断線の有無
を、簡便な方法で確認する可搬型光サーキットチェッカ
ーに関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a portable optical circuit checker for checking the presence / absence of disconnection of an optical circuit by a simple method.
【０００２】[0002]
【従来の技術】光ファイバ等の光導波路を用いた光通信
システムは、基幹伝送路から家庭内へとその利用が進展
しており、それとともに光信号の分岐、合流等の複雑な
構成が一般化しつつある。また、分岐、合流による損失
を補償するために、光ファイバ増幅器等の利用が考えら
れているが、光増幅器は光雑音発生源としての性質をも
有する。従来の単純な構成の光通信システムにおいては
光回路断線の有無は直接目視により簡単に行えたが、将
来の複雑な加入者システム等では、直接目視による光回
路断線の有無の確認は不可能と考えられる。2. Description of the Related Art The use of optical communication systems using optical waveguides such as optical fibers is progressing from backbone transmission lines to homes, and in addition, complicated configurations such as branching and merging of optical signals are common. It is becoming more common. Further, in order to compensate the loss due to branching and merging, use of an optical fiber amplifier or the like is considered, but the optical amplifier also has a property as an optical noise generation source. In the conventional optical communication system with a simple configuration, it was possible to easily visually check for the presence or absence of an optical circuit disconnection, but in the future complicated subscriber systems, etc., it is impossible to directly confirm the presence or absence of an optical circuit disconnection. Conceivable.
【０００３】[0003]
【発明が解決しようとする課題】直接目視による確認の
代替手段として、光信号を実際に被測定光回路へ入力
し、光パワーメータでその信号光強度を確認する方法が
考えられるが、光増幅器等の光雑音発生源を中途に介接
するような光回路では、入力した光信号が雑音のなかに
埋もれてしまい、光パワーメータでの確認は不可能とな
る。As an alternative to the direct visual confirmation, a method of actually inputting an optical signal into an optical circuit to be measured and confirming the signal light intensity with an optical power meter is conceivable. In an optical circuit in which an optical noise generation source such as the above is interposed midway, the input optical signal is buried in the noise and cannot be confirmed by the optical power meter.
【０００４】また、光スペクトラムアナライザを使用
し、光信号スペクトルを測定することにより、信号光の
存在を確認するという方法も考えられるが、光雑音発生
源からの光雑音が大きい場合には、光スペクトラムアナ
ライザでは十分なＳ／Ｎ比が確保できないため、確認不
能となってしまう。A method of confirming the presence of signal light by measuring an optical signal spectrum using an optical spectrum analyzer may be considered. However, when the optical noise from the optical noise source is large, the With a spectrum analyzer, a sufficient S / N ratio cannot be secured, so confirmation becomes impossible.
【０００５】こゝにおいて、本発明は、光雑音発生源を
中途に介接するような光回路の断線の有無を直接目視以
外により確認できる、正確、簡便、迅速でＳ／Ｎ比が高
く、ダイナミックレンジの広い可搬型光サーキットチェ
ッカーを提供せんとするものである。According to the present invention, the presence / absence of a disconnection of an optical circuit which connects an optical noise source in the middle can be confirmed directly except by visual observation, which is accurate, simple, quick, has a high S / N ratio, and is dynamic. It aims to provide a portable optical circuit checker with a wide range.
【０００６】[0006]
【課題を解決するための手段】前記課題の解決は、本発
明が次に列挙する新規な特徴的構成手段を採用すること
により達成される。即ち、本発明の第１の特徴は、発振
器と、該発振器によって変調される信号光源と、該信号
光源の出力を測定光回路につなぐための第１の光コネク
タと、該測定光回路から戻ってきた該信号光源の出力を
受ける第２の光コネクタと、該第２の光コネクタを経由
してきた戻り光から該発振器の発振周波数の電気信号強
度を抽出し、該測定光回路の断線の有無を検出する光−
電気変換部と、該発振器と該信号光源と該光−電気変換
部を収納し該第１の光コネクタと該第２の光コネクタを
一側に貫着した器筺を有してなる可搬型光サーキットチ
ェッカーである。The solution to the above-mentioned problems can be achieved by adopting the novel characteristic construction means enumerated below by the present invention. That is, the first feature of the present invention is that an oscillator, a signal light source modulated by the oscillator, a first optical connector for connecting the output of the signal light source to a measurement optical circuit, and a return from the measurement optical circuit. A second optical connector for receiving the output of the signal light source, and an electric signal strength of the oscillation frequency of the oscillator extracted from the return light passing through the second optical connector to determine whether or not the measurement optical circuit is disconnected. Light to detect
A portable type having an electrical conversion unit, the oscillator, the signal light source, the optical-electrical conversion unit, and a housing in which the first optical connector and the second optical connector are attached to one side. Optical circuit checker.
【０００７】本発明の第２の特徴は、前記第１の特徴に
おける光−電気変換部が、受光素子と電気信号の帯域通
過フィルタ及び電気信号強度検出器で構成してなる可搬
型光サーキットチェッカーである。A second aspect of the present invention is a portable optical circuit checker in which the opto-electrical conversion section in the first aspect comprises a light receiving element, an electric signal band pass filter, and an electric signal strength detector. Is.
【０００８】本発明の第３の特徴は、前記第１の特徴に
おける光−電気変換部が、受光素子と電気信号の帯域通
過フィルタ及びオシロスコープで構成してなる可搬型光
サーキットチェッカーである。A third aspect of the present invention is a portable optical circuit checker in which the optical-electrical conversion section in the first aspect is constituted by a light receiving element, a bandpass filter for an electric signal and an oscilloscope.
【０００９】本発明の第４の特徴は、前記第１の特徴に
おける光−電気変換部が、受光素子と電気信号のスペク
トラムアナライザで構成してなる可搬型光サーキットチ
ェッカーである。A fourth aspect of the present invention is a portable optical circuit checker in which the optical-electrical conversion section in the first aspect is composed of a light receiving element and a spectrum analyzer of electric signals.
【００１０】[0010]
【作用】本発明は、前記のような手段を講じて、ある周
波数により信号光源に直接又は間接的に変調をかけ、光
回路出力での該信号光出力を電気信号に変換し、該周波
数信号成分を電気的に検出することにより、光回路断線
の有無を判定する。According to the present invention, by taking the above-mentioned means, the signal light source is directly or indirectly modulated at a certain frequency, the signal light output at the optical circuit output is converted into an electric signal, and the frequency signal is outputted. The presence or absence of the optical circuit disconnection is determined by electrically detecting the component.
【００１１】そもそも、光信号と電気信号を比較した場
合、電気信号では非常に狭帯域の帯域通過フィルタを構
成することが容易にできるので、電気信号の方が信号の
Ｓ／Ｎ比を高くすることができる。そのため、通常の手
段（光パワーメータの使用等）では光雑音に埋もれてし
まって検出できない光信号を、高いＳ／Ｎ比で電気信号
に変換した形で検出することができるので、雑音に埋も
れてしまっている光信号を正確に検出することができ
る。In the first place, when comparing an optical signal and an electric signal, it is easy to construct a bandpass filter having a very narrow band with the electric signal, so that the electric signal has a higher S / N ratio. be able to. Therefore, it is possible to detect an optical signal that is buried in optical noise and cannot be detected by ordinary means (such as the use of an optical power meter) in the form of being converted into an electrical signal with a high S / N ratio, and thus is buried in noise. It is possible to accurately detect an optical signal that has been lost.
【００１２】[0012]
【実施例】 （第１実施例）本発明の第１実施例を図面に基づき詳説
する。図１に被測定光回路を接続した本実施例の透視内
部回路を示す。図中、Ａは本実施例の可搬型光サーキッ
トチェッカー、１は信号光源、２は例えば４ＭＨｚの発
振周波数Ｆを有する発振器、３は測定対象となる被測定
光回路、４は受光素子、５は４ＭＨｚ帯の電気信号の帯
域通過フィルタである。First Embodiment A first embodiment of the present invention will be described in detail with reference to the drawings. FIG. 1 shows a see-through internal circuit of this embodiment to which an optical circuit under test is connected. In the figure, A is a portable optical circuit checker of the present embodiment, 1 is a signal light source, 2 is an oscillator having an oscillation frequency F of, for example, 4 MHz, 3 is an optical circuit to be measured, 4 is a light receiving element, 5 is a light receiving element. It is a band-pass filter for electric signals in the 4 MHz band.
【００１３】６は電気信号強度検出器、７は光ファイ
バ、８は電線、９，１０は被測定対象光回路３と本実施
例の可搬型光サーキットチェッカーＡとをワンタッチ接
続取外し自在に接続するためのそれぞれ送信用と受信用
光コネクタ、α１は受光素子４，帯域通過フィルタ５及
び電気信号強度検出器６より構成される光−電気変換
部、βは可搬型器筺である。被測定光回路３には光雑音
発生源となる光増幅器３ａ群が含まれる。Reference numeral 6 is an electric signal strength detector, 7 is an optical fiber, 8 is an electric wire, and 9 and 10 are the one-touch connection and disconnection of the optical circuit 3 to be measured and the portable optical circuit checker A of this embodiment. , Α1 is an optical-electrical conversion unit composed of the light receiving element 4, the bandpass filter 5 and the electric signal strength detector 6, and β is a portable device. The measured optical circuit 3 includes a group of optical amplifiers 3a which are sources of optical noise.
【００１４】本実施例の仕様は、このような具体的実施
態様であって、次にその動作を説明する。まず、発振器
２の発振周波数Ｆで変調された光信号Ｌ１は、送信用光
コネクタ９から被測定光回路３へ送り出され、さらに受
信用光コネクタ１０から入力されて、被測定光回路３に
回路断線がなければ受光素子４で光信号Ｌ２として受光
される。この時、受光素子４で光信号Ｌ２のパワーＰｏ
が電気信号Ｓ１のパワーＰｅに変換されるが、被測定光
回路３に内蔵される雑音源たる光増幅器３ａが発生する
光雑音の影響を受け、その電気信号Ｓ１のパワーＰｅは
光信号Ｌ２のパワーＰｏに比例したものとはならない。The specification of this embodiment is such a concrete embodiment, and its operation will be described below. First, the optical signal L1 modulated by the oscillation frequency F of the oscillator 2 is sent out from the transmitting optical connector 9 to the measured optical circuit 3 and further input from the receiving optical connector 10 to the measured optical circuit 3. If there is no disconnection, the light receiving element 4 receives the light signal L2. At this time, the power Po of the optical signal L2 is received by the light receiving element 4.
Is converted into the power Pe of the electric signal S1. However, the power Pe of the electric signal S1 is affected by the optical noise generated by the optical amplifier 3a which is a noise source built in the measured optical circuit 3, and the power Pe of the electric signal S2 is It is not proportional to the power Po.
【００１５】ところが、この電気信号Ｓ１のパワーＰｅ
は発振器２の発振周波数Ｆに対応する帯域通過フィルタ
５を経ることにより、光信号Ｌ２のパワーＰｏに比例す
る成分のみが抽出され、電気信号強度検出器６により検
出される。帯域通過フィルタ５のＱ値は非常に高いもの
にすることが簡単にできるので、光信号Ｌ２と比べてＳ
／Ｎ比の高い信号強度検出が可能となる。従って、信号
成分検出の有無により、被測定光回路３に断線が有るか
無いかが簡単に判定できる。However, the power Pe of this electric signal S1
Passes through the bandpass filter 5 corresponding to the oscillation frequency F of the oscillator 2 so that only the component proportional to the power Po of the optical signal L2 is extracted and detected by the electric signal intensity detector 6. Since the Q value of the band pass filter 5 can be easily made very high, the S value is higher than that of the optical signal L2.
It is possible to detect a signal strength with a high / N ratio. Therefore, it is possible to easily determine whether or not the optical circuit 3 to be measured has a disconnection depending on whether or not the signal component is detected.
【００１６】なお、発振器２の発振周波数Ｆは、被測定
光回路３中の光増幅器３ａの低減遮断周波数より高い周
波数であれば任意に設定することが可能であるが、発振
器２，帯域通過フィルタ５等の経済性、帯域通過フィル
タ５の高Ｑ値化の容易性等の観点からは、非常に高周波
であることは望ましいことではないので、１ｋＨｚ以上
数１００ＭＨｚ以下が実用的であると考えられる。The oscillation frequency F of the oscillator 2 can be arbitrarily set as long as it is higher than the reduction cutoff frequency of the optical amplifier 3a in the optical circuit 3 to be measured. From the viewpoints of economy of 5 and the like, easiness of increasing the Q value of the bandpass filter 5, and the like, it is not desirable that the frequency is very high, so that it is considered that 1 kHz or more and several 100 MHz or less are practical. ..
【００１７】（第２実施例）本発明の第２実施例を図面
につき説明する。図２に被測定光回路を接続した本実施
例の透視内部回路を示す。図中、Ｂは本実施例の可搬型
光サーキットチェッカー、１は信号光源、２は例えば４
ＭＨｚの発振周波数Ｆを有する発振器、３は測定対象と
なる被測定光回路、４は受光素子、５は４ＭＨｚ帯の電
気信号の帯域通過フィルタである。(Second Embodiment) A second embodiment of the present invention will be described with reference to the drawings. FIG. 2 shows a see-through internal circuit of this embodiment to which an optical circuit to be measured is connected. In the figure, B is the portable optical circuit checker of this embodiment, 1 is a signal light source, and 2 is, for example, 4
An oscillator having an oscillation frequency F of MHz, 3 is a measured optical circuit to be measured, 4 is a light receiving element, and 5 is a band-pass filter for an electric signal in the 4 MHz band.
【００１８】７は光ファイバ、８は電線、９，１０は被
測定光回路３と本実施例の可搬型光サーキットチェッカ
ーＢとをワンタッチ接続取外し自在に接続するためのそ
れぞれ送信用と受信用光コネクタ、１１はオシロスコー
プ、α２は受光素子４，帯域通過フィルタ５及びオシロ
スコープ１１より構成される光−電気変換部、βは可搬
型器筺である。なお、図２においては図示しないが、前
記第１実施例と同様に、被測定回路３には光雑音発生源
たる光増幅器３ａ群等が含まれていることは、いうまで
もない。Reference numeral 7 is an optical fiber, 8 is an electric wire, and 9 and 10 are light for transmission and reception for connecting the optical circuit under test 3 and the portable optical circuit checker B of this embodiment in a one-touch connection and detachable manner. A connector, 11 is an oscilloscope, α2 is an optical-electrical conversion unit composed of the light receiving element 4, the bandpass filter 5 and the oscilloscope 11, and β is a portable device. Although not shown in FIG. 2, it goes without saying that the circuit under test 3 includes a group of optical amplifiers 3a, which are sources of optical noise, as in the first embodiment.
【００１９】本実施例の仕様は、このような具体的実施
態様であって、次にその動作を説明する。まず、発振器
２の発振周波数Ｆで変調された光信号Ｌ１は、送信用光
コネクタ９から被測定光回路３を通り受信用光コネクタ
１０を通過して、被測定光回路３に回路断線がなければ
受光素子４で光信号Ｌ２として受光される。The specification of this embodiment is such a concrete embodiment, and its operation will be described below. First, the optical signal L1 modulated by the oscillation frequency F of the oscillator 2 passes from the optical connector 9 for transmission, the optical circuit 3 for measurement, and the optical connector 10 for reception, and there is no circuit disconnection in the optical circuit 3 for measurement. For example, the light receiving element 4 receives the light as the optical signal L2.
【００２０】この時、受光素子４で光信号Ｌ２のパワー
Ｐｏが電気信号Ｓ１のパワーＰｅに変換されるが、被測
定光回路３に内蔵される図示しない光増幅器の雑音源が
発生する光雑音の影響を受け、その電気信号Ｓ１のパワ
ーＰｅは光信号Ｌ２のパワーＰｏに比例したものとはな
らない。ところが、この電気信号Ｓ１のパワーＰｅは発
振器２の発振周波数Ｆに対応する帯域通過フィルタ５を
経ることにより、光信号Ｌ２のパワーＰｏに比例する成
分のみが抽出され、オシロスコープ１１の画面に表示さ
れる。At this time, the power Po of the optical signal L2 is converted into the power Pe of the electric signal S1 by the light receiving element 4, but the optical noise generated by the noise source of the optical amplifier (not shown) built in the optical circuit 3 to be measured is generated. The power Pe of the electric signal S1 is not proportional to the power Po of the optical signal L2. However, the power Pe of the electric signal S1 passes through the bandpass filter 5 corresponding to the oscillation frequency F of the oscillator 2, so that only the component proportional to the power Po of the optical signal L2 is extracted and displayed on the screen of the oscilloscope 11. It
【００２１】従って、被測定光回路３に断線がなけれ
ば、オシロスコープ１１では、発振器２の発振周波数Ｆ
に対応する低周波の正弦波信号波形が検出され、画面に
表示される。よって、オシロスコープ１１の画面上に正
弦波信号波形が表示されるかされないかにより、被測定
光回路３に断線が有るか無いかが簡単に判定できる。Therefore, if there is no break in the optical circuit 3 to be measured, the oscilloscope 11 causes the oscillator 2 to generate the oscillation frequency F.
The low frequency sine wave signal waveform corresponding to is detected and displayed on the screen. Therefore, it is possible to easily determine whether or not there is a break in the measured optical circuit 3 depending on whether or not the sine wave signal waveform is displayed on the screen of the oscilloscope 11.
【００２２】なお、発振器２の発振周波数は、光回路３
中の光増幅器群の低減遮断周波数より高い周波数であれ
ば任意に設定することが可能であるが、前記第１実施例
と同様に、１ｋＨｚ以上数１００ＭＨｚ以下が実用的で
あると考えられる。The oscillation frequency of the oscillator 2 is set to the optical circuit 3
The frequency can be arbitrarily set as long as it is higher than the reduced cutoff frequency of the optical amplifier group in the inside, but it is considered that 1 kHz or more and several 100 MHz or less are practical as in the first embodiment.
【００２３】（第３実施例）本発明の第３実施例を図面
につき説明する。図３に被測定光回路を接続した本実施
例の透視内部回路を示す。図中、Ｃは本実施例の可搬型
光サーキットチェッカー、１は信号光源、２は例えば４
ＭＨｚの発振周波数Ｆを有する発振器、３は測定対象と
なる被測定光回路、４は受光素子、７は光ファイバ、８
は電線である。(Third Embodiment) A third embodiment of the present invention will be described with reference to the drawings. FIG. 3 shows a see-through internal circuit of this embodiment to which an optical circuit to be measured is connected. In the figure, C is the portable optical circuit checker of this embodiment, 1 is a signal light source, and 2 is, for example, 4
Oscillator having an oscillation frequency F of MHz, 3 is an optical circuit to be measured as a measurement target, 4 is a light receiving element, 7 is an optical fiber, 8
Is an electric wire.
【００２４】９，１０は被測定光回路３と本実施例の可
搬型光サーキットチェッカーＣとをワンタッチ接続取外
し自在に接続するためのそれぞれ送信用と受信用光コネ
クタ、１２はスペクトラムアナライザ、α３は受光素子
４及びスペクトラムアナライザ１２より構成される光−
電気変換部、βは可搬型器筺である。なお、図３におい
ては図示しないが、前記第１実施例と同様に、被測定光
回路３には光雑音発生源たる光増幅器３ａ群等が含まれ
ていることはいうまでもない。Numerals 9 and 10 are optical connectors for transmission and reception, respectively, for connecting the optical circuit 3 to be measured and the portable optical circuit checker C of this embodiment in a one-touch connection and detachment respectively, 12 is a spectrum analyzer, and α3 is α3. Light composed of the light receiving element 4 and the spectrum analyzer 12
The electrical conversion unit, β is a portable device housing. Although not shown in FIG. 3, it goes without saying that the optical circuit 3 to be measured includes an optical amplifier 3a group, which is an optical noise generation source, as in the first embodiment.
【００２５】本実施例の仕様は、このような具体的実施
態様であって、次にその動作を説明する。まず、発振器
２の発振周波数Ｆで変調された光信号Ｌ１は、送信用光
コネクタ９から被測定光回路３を通り受信用光コネクタ
１０を通過して、被測定光回路３に回路断線がなければ
受光素子４で光信号Ｌ２として受光される。The specification of this embodiment is such a concrete embodiment, and its operation will be described below. First, the optical signal L1 modulated by the oscillation frequency F of the oscillator 2 passes from the optical connector 9 for transmission, the optical circuit 3 for measurement, and the optical connector 10 for reception, and there is no circuit disconnection in the optical circuit 3 for measurement. For example, the light receiving element 4 receives the light as the optical signal L2.
【００２６】この時、受光素子４で光信号Ｌ２のパワー
Ｐｏが電気信号Ｓ１のパワーＰｅに変換されるが、被測
定光回路３が発生する図示しない光増幅器の光雑音の影
響を受け、その電気信号Ｓ１のパワーＰｅは光信号Ｌ２
のパワーＰｏに比例したものとはならない。ところが、
この電気信号Ｓ１のパワーＰｅをスペクトラムアナライ
ザ１２に入力すれば、発振器２の発振周波数Ｆに対応す
るスペクトルのみをスペクトラムアナライザ１２で表示
することができる。At this time, the power Po of the optical signal L2 is converted into the power Pe of the electric signal S1 by the light receiving element 4, but it is affected by the optical noise of an optical amplifier (not shown) generated by the optical circuit 3 to be measured, The power Pe of the electric signal S1 is the optical signal L2.
It is not proportional to the power Po of. However,
By inputting the power Pe of the electric signal S1 to the spectrum analyzer 12, only the spectrum corresponding to the oscillation frequency F of the oscillator 2 can be displayed on the spectrum analyzer 12.
【００２７】従って、光回路３に断線がなければ、スペ
クトラムアナライザ１２の画面上に、発振器２の発振周
波数Ｆに対応した低周波電気信号Ｓ１の周波数のスペク
トルが観測される。信号Ｓ１に対応するスペクトルが検
出されるかされないかにより、被測定光回路３に断線が
有るか無いかが簡単に判定できる。Therefore, if there is no break in the optical circuit 3, the spectrum of the frequency of the low-frequency electric signal S1 corresponding to the oscillation frequency F of the oscillator 2 is observed on the screen of the spectrum analyzer 12. Whether or not the measured optical circuit 3 has a disconnection can be easily determined depending on whether or not the spectrum corresponding to the signal S1 is detected.
【００２８】また、発振器２の発振周波数は、前記第１
実施例又は第２実施例と同様に、光回路中の光増幅器の
低減遮断周波数より高い周波数であれば任意に設定する
ことが可能であるが、１ｋＨｚ以上数１００ＭＨｚ以下
が実用的であると考えられる。The oscillation frequency of the oscillator 2 is the same as the first frequency.
Similar to the embodiment or the second embodiment, any frequency can be set as long as it is higher than the reduced cutoff frequency of the optical amplifier in the optical circuit, but it is considered that 1 kHz or more and several 100 MHz or less are practical. Be done.
【００２９】なお、以上の第１乃至第３実施例では、専
ら発振器２により信号光源１を直接変調するもこれに限
定されず、他の手段により間接変調することも本発明の
技術的思想に当然包含される。また、光コネクタ９，１
０は可搬型器筺βの上下左右前後いずれの側壁に貫着し
ても良い。In the above-mentioned first to third embodiments, the signal light source 1 is directly modulated by the oscillator 2 but is not limited to this. Indirect modulation by other means is also within the technical idea of the present invention. Naturally included. Also, the optical connectors 9 and 1
0 may be attached to any of the upper, lower, left, right, front, and rear side walls of the portable device housing β.
【００３０】[0030]
【発明の効果】かくして、本発明により、光雑音発生源
を含む複雑な光回路において、直接目視以外の手段によ
り回路断線の有無を検証する、簡易で正確な方法が与え
られる。光通信方式の普及に伴い光回路は複雑化してお
り、人為ミスその他を原因とする断線が発生しやすくな
っている。As described above, the present invention provides a simple and accurate method for verifying the presence or absence of circuit disconnection in a complicated optical circuit including an optical noise source by means other than direct visual inspection. With the spread of optical communication systems, optical circuits have become complicated, and disconnection due to human error or the like is likely to occur.
【００３１】従って、断線の有無の確認のためには多く
の時間と人手を要しているが、本発明はその確認作業を
非常に簡便化するものであり、その確認作業も光回路設
備現場に搬入し光回路の送受端を送信用光コネクタと受
信用光コネクタにそれぞれワンタッチ接続するだけで動
作可能となり、各種出力表示器を通して間接目視確認出
来る等優れた効果を奏する。Therefore, it takes a lot of time and manpower to confirm the presence / absence of the disconnection, but the present invention greatly simplifies the confirmation work, and the confirmation work is also performed at the optical circuit facility site. It can be operated simply by connecting the transmitting and receiving ends of the optical circuit to the transmitting optical connector and the receiving optical connector by one-touch operation, and it is possible to perform indirect visual confirmation through various output indicators, which is an excellent effect.
【図１】被測定光回路を接続した本発明の第１実施例を
示す透視内部回路である。FIG. 1 is a perspective internal circuit showing a first embodiment of the present invention in which an optical circuit to be measured is connected.
【図２】同上、第２実施例を示す透視内部回路である。FIG. 2 is a perspective internal circuit showing a second embodiment of the same.
【図３】同上、第３実施例を示す透視内部回路である。FIG. 3 is a perspective internal circuit showing the third embodiment.
Ａ，Ｂ，Ｃ…可搬型光サーキットチェッカー Ｆ…発振周波数 Ｌ１，Ｌ２…光信号 Ｓ１…電気信号 α１，α２，α３…光−電気変換部 β…可搬型器筺 １…信号光源 ２…発振器 ３…被測定光回路 ４…受光素子 ５…帯域通過フィルタ ６…電気信号強度検出器 ７…光ファイバ ８…電線 ９…送信用光コネクタ １０…受信用光コネクタ １１…オシロスコープ １２…スペクトラムアナライザー A, B, C ... Portable optical circuit checker F ... Oscillation frequency L1, L2 ... Optical signal S1 ... Electrical signal α1, α2, α3 ... Optical-electrical converter β ... Portable device case 1 ... Signal light source 2 ... Oscillator 3 ... Optical circuit under test 4 ... Light receiving element 5 ... Band pass filter 6 ... Electrical signal strength detector 7 ... Optical fiber 8 ... Electric wire 9 ... Optical connector for transmission 10 ... Optical connector for reception 11 ... Oscilloscope 12 ... Spectrum analyzer
───────────────────────────────────────────────────── フロントページの続き (72)発明者 若林 博晴 東京都新宿区西新宿２丁目３番２号 国際 電信電話株式会社内 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Hiroharu Wakabayashi 2-3-2 Nishishinjuku, Shinjuku-ku, Tokyo International Telegraph and Telephone Corporation
Claims (4)
号光源と、該信号光源の出力を測定光回路につなぐため
の第１の光コネクタと、該測定光回路から戻ってきた該
信号光源の出力を受ける第２の光コネクタと、該第２の
光コネクタを経由してきた戻り光から該発振器の発振周
波数の電気信号強度を抽出し、該測定光回路の断線の有
無を検出する光−電気変換部と、該発振器と該信号光源
と該光−電気変換部を収納し該第１の光コネクタと該第
２の光コネクタを一側に貫着した器筺を有することを特
徴とする可搬型光サーキットチェッカー1. An oscillator, a signal light source modulated by the oscillator, a first optical connector for connecting an output of the signal light source to a measurement optical circuit, and a signal light source returned from the measurement optical circuit. A second optical connector that receives an output and an optical-electrical device that extracts the electrical signal strength of the oscillation frequency of the oscillator from the return light that has passed through the second optical connector and detects the presence or absence of a disconnection of the measurement optical circuit. It is possible to have a housing that houses the converter, the oscillator, the signal light source, and the opto-electric converter, and has the housing in which the first optical connector and the second optical connector are attached to one side. Portable optical circuit checker
号の帯域通過フィルタ及び電気信号強度検出器で構成し
たことを特徴とする請求項１記載の可搬型光サーキット
チェッカー2. The portable optical circuit checker according to claim 1, wherein the optical-electrical conversion unit is composed of a light receiving element, a bandpass filter for an electric signal, and an electric signal strength detector.
号の帯域通過フィルタ及びオシロスコープで構成したこ
とを特徴とする請求項１記載の可搬型光サーキットチェ
ッカー3. The portable optical circuit checker according to claim 1, wherein the optical-electrical conversion unit is composed of a light receiving element, a bandpass filter for electric signals, and an oscilloscope.
号のスペクトラムアナライザで構成したことを特徴とす
る請求項１記載の可搬型光サーキットチェッカー4. The portable optical circuit checker according to claim 1, wherein the optical-electrical conversion unit is composed of a light receiving element and a spectrum analyzer for electric signals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4127683A JPH05322697A (en) | 1992-05-20 | 1992-05-20 | Portable optical circuit checker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4127683A JPH05322697A (en) | 1992-05-20 | 1992-05-20 | Portable optical circuit checker |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05322697A true JPH05322697A (en) | 1993-12-07 |
Family
ID=14966130
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4127683A Pending JPH05322697A (en) | 1992-05-20 | 1992-05-20 | Portable optical circuit checker |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05322697A (en) |
-
1992
- 1992-05-20 JP JP4127683A patent/JPH05322697A/en active Pending
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