JP2011013360A - Photodetector and optical transmission system using the same - Google Patents

Photodetector and optical transmission system using the same Download PDF

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JP2011013360A
JP2011013360A JP2009155963A JP2009155963A JP2011013360A JP 2011013360 A JP2011013360 A JP 2011013360A JP 2009155963 A JP2009155963 A JP 2009155963A JP 2009155963 A JP2009155963 A JP 2009155963A JP 2011013360 A JP2011013360 A JP 2011013360A
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light
amount
communication
optical
unit
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JP5734552B2 (en
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Masatsugu Kojima
正嗣 小島
Kanako Suzuki
香菜子 鈴木
Yoshihiro Nakatani
佳広 中谷
Toshihiko Ishikawa
俊彦 石川
Kyoji Osozawa
恭二 遅沢
Takao Nishikawa
貴雄 西川
Kojiro Ito
弘二郎 伊東
Tetsuya Sueoka
鉄也 末岡
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Hitachi Cable Ltd
NTT Communications Corp
Advanced Cable Systems Corp
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Hitachi Cable Ltd
NTT Communications Corp
Advanced Cable Systems Corp
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Abstract

PROBLEM TO BE SOLVED: To provide a photodetector that detects presence/absence of communication light propagating on an optical transmission line and that detects presence/absence of optical loss generated on the optical transmission line.SOLUTION: The photodetector 1 is connected to an optical connector 3 and detects leaked light from a light pick-up means 2, the optical connector 3 being installed in a part for connecting optical transmission lines to each other and equipped with a light pick-up means 2 for taking out a part of communication light propagating on the optical transmission lines. The photodetector 1 includes an output means for outputting a light quantity of the communication light detected from the light quantity of the leaked light.

Description

本発明は、光伝送路を伝搬する通信光の有無を検知する光検知器及びこれを用いた光伝送システムに関するものである。   The present invention relates to a photodetector that detects the presence or absence of communication light propagating through an optical transmission line, and an optical transmission system using the same.

データセンタや局舎などの光通信関連設備では、光伝送路を伝搬する通信光は、可視光領域にない不可視光であることが多いため、目視にて確認することができない。そのため、光伝送路が使用されているか否かといった運用状態を容易に把握できず、また、使用中の光伝送路を未使用と誤認して、光コネクタを抜いてしまうなどの問題があった。   In optical communication-related facilities such as a data center and a station building, communication light propagating through an optical transmission line is often invisible light that is not in the visible light region, and thus cannot be visually confirmed. For this reason, it is not possible to easily grasp the operation state such as whether or not the optical transmission line is used, and there is a problem that the optical transmission line in use is mistakenly regarded as unused and the optical connector is pulled out. .

そこで、光通信関連設備の保守性や運用効率を向上させるため、光ファイバを接続した状態で、光伝送路を伝搬される通信光の有無を目視で確認するための光検知器が検討されている。   Therefore, in order to improve maintainability and operational efficiency of optical communication-related equipment, optical detectors for visually confirming the presence or absence of communication light propagating through the optical transmission line with optical fibers connected are being studied. Yes.

例えば、光ファイバが内蔵された割スリーブ内で突き合わせ接続されるフェルールの端面同士の間にギャップを設け、そのギャップに光透過性樹脂からなる導波体を設け、導波体の上方に導かれた通信光の一部を蛍光体で受光し、通信光の伝搬の有無を検出する光検知器が提案されている（例えば、特許文献１参照）。   For example, a gap is provided between the end faces of the ferrules that are butt-connected in a split sleeve containing an optical fiber, and a waveguide made of a light-transmitting resin is provided in the gap, and is guided above the waveguide. There has been proposed a photodetector that receives a part of communication light with a phosphor and detects the presence or absence of communication light propagation (see, for example, Patent Document 1).

また、光ファイバを内蔵した２つのフェルール間に光導波路基板を配置し、通信光の一部を光導波路基板にて分岐して通信光出力部へ取り出すことにより、通信光の有無を確認する光検知器が提案されている（例えば、特許文献２参照）。   Light that confirms the presence or absence of communication light by placing an optical waveguide substrate between two ferrules with built-in optical fibers, branching part of the communication light at the optical waveguide substrate, and taking it out to the communication light output unit A detector has been proposed (see, for example, Patent Document 2).

通信光の一部を分岐して取り出す分岐器を使用し、分岐光の端末部に可視光変換素子を取り付ける光検知器が提案されている（例えば、特許文献３参照）。   There has been proposed a photodetector that uses a branching device that branches and extracts a part of communication light and attaches a visible light conversion element to the terminal portion of the branched light (see, for example, Patent Document 3).

このように、従来の光検知器では、取り出した通信光の一部を可視光に変換して出力することで、通信光の有無を目視で確認できるようにしている。   As described above, in the conventional photodetector, a part of the extracted communication light is converted into visible light and output so that the presence or absence of the communication light can be visually confirmed.

特開２００４−１７０４８８号公報JP 2004-170488 A 特開２００４−１３３０７１号公報JP 2004-133071 A 特開２００３−２１８８１３号公報JP 2003-218813 A 特開２００２−２１４４８７号公報JP 2002-214487 A 特開２００４−１７７５４９号公報JP 2004-177549 A

ところで、光通信関連設備において、従来の光検知器を光伝送路内に配置させることにより、任意の光伝送路を伝搬する通信光の有無を把握することはできるものの、光伝送路の劣化等によって光損失が発生しているか否かは把握することができない。   By the way, in optical communication related equipment, it is possible to grasp the presence or absence of communication light propagating through an arbitrary optical transmission line by placing a conventional photodetector in the optical transmission line, but the optical transmission line is deteriorated, etc. Therefore, it cannot be determined whether or not optical loss has occurred.

そのため、通信障害等の問題が生じる前に、光損失が発生した光伝送路の交換や切り替え等の措置を講じることができない場合があり、従来の光検知器で光通信関連設備の保守性や運用効率を向上させるのに十分であるとは言い難い。   For this reason, measures such as replacement or switching of an optical transmission line in which an optical loss has occurred cannot be taken before problems such as communication failures occur. It is hard to say that it is enough to improve operational efficiency.

そこで、本発明の目的は、光伝送路を伝搬する通信光の有無を検知することができると共に、光伝送路における光損失の発生の有無を検知することができる光検知器及びこれを用いた光伝送システムを提供することにある。   Therefore, an object of the present invention is to detect the presence or absence of communication light propagating through an optical transmission line, and to use a photodetector capable of detecting the presence or absence of light loss in the optical transmission line and the same. The object is to provide an optical transmission system.

本発明は上記目的を達成するために創案されたものであり、請求項１の発明は、光伝送路同士を接続する部分に設けられて前記光伝送路を伝搬する通信光の一部を取り出す光取り出し手段を備えた光コネクタに接続され、前記光取り出し手段からの漏洩光を検知する光検知器において、前記漏洩光の光量から検知した前記通信光の光量を出力する出力手段を備えたことを特徴とする光検知器である。   The present invention has been devised to achieve the above object, and the invention according to claim 1 extracts a part of communication light that is provided at a portion connecting the optical transmission lines and propagates through the optical transmission line. In an optical detector connected to an optical connector having light extraction means and detecting leakage light from the light extraction means, output means for outputting the amount of communication light detected from the amount of leakage light is provided. This is a photodetector.

請求項２の発明は、前記漏洩光を受光する受光部と、該受光部にて受光した前記漏洩光の光量を検知し、前記漏洩光の光量に基づいて前記通信光の光量を検知して出力する検知部とをさらに備え、前記出力手段は、前記検知部にて検知した前記通信光の光量を表示する光量表示部を有する請求項１に記載の光検知器である。   According to a second aspect of the present invention, a light receiving unit that receives the leaked light and a light amount of the leaked light received by the light receiving unit are detected, and a light amount of the communication light is detected based on the light amount of the leaked light. The detector according to claim 1, further comprising: a detection unit that outputs, wherein the output unit includes a light amount display unit that displays a light amount of the communication light detected by the detection unit.

請求項３の発明は、前記光量表示部は、前記検知部にて検知された前記通信光の光量を含む所定範囲の通信光の光量の最低値が表示される請求項２に記載の光検知器である。   The invention according to claim 3 is the light detection according to claim 2, wherein the light amount display unit displays a minimum value of the light amount of the communication light in a predetermined range including the light amount of the communication light detected by the detection unit. It is a vessel.

請求項４の発明は、前記受光部にて受光した前記漏洩光から装置識別信号を検知し、該装置識別信号に含まれる識別番号から装置識別情報を取得する装置識別部と、該装置識別部で取得した前記装置識別情報を表示する識別情報表示部とをさらに備える請求項１又は２に記載の光検知器である。   According to a fourth aspect of the present invention, there is provided a device identification unit that detects a device identification signal from the leaked light received by the light receiving unit and acquires device identification information from an identification number included in the device identification signal, and the device identification unit The photodetector according to claim 1, further comprising an identification information display unit that displays the device identification information acquired in step 1.

請求項５の発明は、前記装置識別部は、外部装置に記憶されたデータベースと通信する通信手段を備え、該通信手段により前記装置識別番号を前記データベースと照会して前記装置識別情報を取得する請求項４に記載の光検知器である。   According to a fifth aspect of the present invention, the device identification unit includes a communication unit that communicates with a database stored in an external device, and acquires the device identification information by querying the device identification number with the database by the communication unit. It is a photodetector of Claim 4.

請求項６の発明は、光伝送路同士を接続する部分に設けられて前記光伝送路を伝搬する通信光の一部を取り出す光取り出し手段を備えた光コネクタが前記光伝送路の複数箇所に設けられており、請求項１〜５のいずれかに記載の光検知器が前記光コネクタに接続されることで前記光伝送路の複数箇所の前記通信光の光量が検知され、光損失の発生箇所が特定されることを特徴とする光伝送システムである。   According to a sixth aspect of the present invention, there is provided an optical connector provided at a portion connecting the optical transmission lines and provided with light extraction means for extracting a part of communication light propagating through the optical transmission line at a plurality of locations of the optical transmission line. The light detector according to claim 1 is connected to the optical connector to detect the light amount of the communication light at a plurality of locations of the optical transmission path, and light loss occurs. This is an optical transmission system characterized in that a location is specified.

本発明によれば、光伝送路を伝搬する通信光の有無を検知することができると共に、光伝送路における光損失の発生の有無を検知することができる。   According to the present invention, it is possible to detect the presence / absence of communication light propagating through the optical transmission line and to detect the occurrence of optical loss in the optical transmission line.

本発明の一実施の形態を示す光検知器の斜視図である。It is a perspective view of the photodetector which shows one embodiment of the present invention. 図１の光検知器と光検知器を取り付ける光コネクタを示す断面図である。It is sectional drawing which shows the optical connector which attaches the photodetector of FIG. 1, and a photodetector. 本発明の他の実施の形態を示す光検知器の斜視図である。It is a perspective view of the photodetector which shows other embodiment of this invention. 図３の光検知器とデータベースとの間において、伝送情報を送受信させたときの模式図である。FIG. 4 is a schematic diagram when transmission information is transmitted and received between the photodetector of FIG. 3 and a database. 本発明の一実施の形態を示す光伝送システムの概略図である。1 is a schematic diagram of an optical transmission system showing an embodiment of the present invention.

以下、本発明の好適な実施の形態を添付図面にしたがって説明する。   Preferred embodiments of the present invention will be described below with reference to the accompanying drawings.

図１は、本発明の一実施の形態を示す光検知器の斜視図であり、図２は、図１の光検知器と光検知器を取り付ける光コネクタを示す断面図である。   FIG. 1 is a perspective view of a photodetector showing an embodiment of the present invention, and FIG. 2 is a cross-sectional view showing the photodetector of FIG. 1 and an optical connector to which the photodetector is attached.

図１、図２に示すように、光検知器１は、伝送装置間を接続する光伝送路（例えば光ファイバ）中に設けられその光伝送路を伝搬する通信光の一部を漏洩させる光取り出し手段２を備えた光コネクタ３（詳細は後述）に、接続され、その光取り出し手段２からの漏洩光を検知するものであり、この漏洩光の光量から検知した通信光の光量を出力する出力手段を備える。   As shown in FIGS. 1 and 2, the photodetector 1 is light that is provided in an optical transmission path (for example, an optical fiber) that connects transmission apparatuses and leaks a part of communication light that propagates through the optical transmission path. It is connected to an optical connector 3 (details will be described later) provided with extraction means 2 and detects leaked light from the optical extraction means 2, and outputs the amount of communication light detected from the amount of leaked light. Output means are provided.

また、光検知器１は、漏洩光を受光すると共に受光した漏洩光を電気信号に変換する受光部４と、受光部４にて受光した漏洩光の光量を検知し、その漏洩光の光量に基づいて通信光の光量を検知して出力する検知部（図示せず）とをさらに備える。本実施の形態において、出力手段は、検知部にて検知した通信光の光量を表示する光量表示部５で構成される。つまり、出力手段は、受光部４で受光した漏洩光に基づいて検知部で検出（算出）した通信光の光量を人が認識できる形で出力するためのものである。また、受光部４及び検知部は、回路基板６に実装され、光検知部が構成される。光検知部を構成する回路基板６は略直方体状の筐体（光検知器本体）７内に収容される。   In addition, the light detector 1 receives the leaked light and converts the received leaked light into an electrical signal, and detects the amount of leaked light received by the light receiving unit 4, and determines the amount of leaked light. And a detection unit (not shown) that detects and outputs the amount of communication light based on the communication light. In the present embodiment, the output means includes a light amount display unit 5 that displays the amount of communication light detected by the detection unit. That is, the output means is for outputting the amount of communication light detected (calculated) by the detection unit based on the leaked light received by the light receiving unit 4 in a form that can be recognized by a person. In addition, the light receiving unit 4 and the detection unit are mounted on the circuit board 6 to constitute a light detection unit. The circuit board 6 constituting the light detection unit is accommodated in a substantially rectangular parallelepiped casing (photodetector body) 7.

受光部４は、光検知器１を光コネクタ３に接続した際に、光取り出し手段２と対向するように、筐体７の底面から突出して設けられる。受光部４は、光コネクタ３の光取り出し手段２によって漏洩された通信光の一部（漏洩光）を受光して電気信号に変換するためのものであり、ＰＤ（フォトダイオード）などの光起電力効果型の光センサからなる。この光センサから出力される電気信号を損失なく後段（検知部）へ伝送するために、増幅器をさらに備えるようにしてもよい。   The light receiving portion 4 is provided so as to protrude from the bottom surface of the housing 7 so as to face the light extraction means 2 when the photodetector 1 is connected to the optical connector 3. The light receiving unit 4 is for receiving a part of the communication light (leakage light) leaked by the light extraction means 2 of the optical connector 3 and converting it into an electrical signal. It consists of a power effect type optical sensor. In order to transmit the electrical signal output from the optical sensor to the subsequent stage (detection unit) without loss, an amplifier may be further provided.

光量表示部５は、複数の発光素子からなり、それぞれの発光素子は筐体７の上面に設けられる。発光素子は、例えばＬＥＤ（発光ダイオード）からなる。これら発光素子は、検知部で検出された通信光の光量に基づいて発光されて光伝送路を伝搬する通信光の光量を表示（図１、図２では、−１０ｄＢｍ、−２０ｄＢｍ、−３０ｄＢｍ、−４０ｄＢｍの各光量を表示）する。   The light quantity display unit 5 includes a plurality of light emitting elements, and each light emitting element is provided on the upper surface of the housing 7. A light emitting element consists of LED (light emitting diode), for example. These light emitting elements display the amount of communication light that is emitted based on the amount of communication light detected by the detector and propagates through the optical transmission line (in FIG. 1 and FIG. 2, -10 dBm, -20 dBm, -30 dBm, Display each light quantity of -40 dBm).

例えば、通信光の光量が検知されていない場合は、「ＯＦＦ」の発光素子が発光されて通信光の光量が検知されていないことを表示する。また、通信光の光量が−４０ｄＢｍ未満の範囲の場合（ＯＦＦの場合を除く）、全ての発光素子が発光されずに、−４０ｄＢｍ未満であることを表示する。さらに、通信光の光量が−４０ｄＢｍ以上−３０ｄＢｍ未満の範囲の場合は、「−４０ｄＢｍ」の発光素子が発光されて通信光の光量が−４０ｄＢｍ以上−３０ｄＢｍ未満の範囲であることを表示する。同様に、−３０ｄＢｍ以上−２０ｄＢｍ未満の範囲、或いは−２０ｄＢｍ以上−１０ｄＢｍ未満の範囲の場合、「−３０ｄＢｍ」或いは「−２０ｄＢｍ」の発光素子が発光されてそれぞれの光量を表示する。また、通信光の光量が−１０ｄＢｍ以上の場合は、「−１０ｄＢｍ」の発光素子が発光されて通信光の光量が−１０ｄＢｍ以上であることを表示する。   For example, when the amount of communication light is not detected, the “OFF” light emitting element emits light to indicate that the amount of communication light is not detected. When the amount of communication light is less than −40 dBm (except when it is OFF), all the light emitting elements are not emitted, and display that the light is less than −40 dBm. Further, when the amount of communication light is in the range of −40 dBm or more and less than −30 dBm, the light emitting element of “−40 dBm” emits light, indicating that the amount of communication light is in the range of −40 dBm or more and less than −30 dBm. Similarly, in the range of −30 dBm or more and less than −20 dBm, or in the range of −20 dBm or more and less than −10 dBm, the light emitting element of “−30 dBm” or “−20 dBm” emits light and displays the respective light amounts. When the amount of communication light is −10 dBm or more, the “−10 dBm” light emitting element emits light to indicate that the amount of communication light is −10 dBm or more.

つまり、光量表示部５は、少なくとも検知部にて検知された通信光の光量を含む所定範囲の通信光の光量の最低値を補償する（表示する）光量表示手段を有する。   That is, the light amount display unit 5 includes a light amount display unit that compensates (displays) a minimum value of the communication light amount within a predetermined range including at least the communication light amount detected by the detection unit.

この他にも筐体７内には、受光部４や検知部、発光素子に電力を供給するための電力供給部（例えば、電池など）８が収容される。   In addition, the housing 7 houses a light supply unit 4, a detection unit, and a power supply unit (for example, a battery) 8 for supplying power to the light emitting element.

筐体７の上面には、電力供給部８からの電力の供給の有無を切り替えるための電源スイッチ９が設けられる。他方、筐体７の底面には、光コネクタ３に形成されたガイド溝１０に挿入される複数（図１、図２では４つ）の脚部１１が形成される。   On the upper surface of the housing 7, a power switch 9 is provided for switching whether to supply power from the power supply unit 8. On the other hand, a plurality of (four in FIG. 1 and FIG. 2) leg portions 11 to be inserted into the guide grooves 10 formed in the optical connector 3 are formed on the bottom surface of the housing 7.

図１、図２では、通信光の光量を出力する４つの発光素子と、通信光の有無を表示する１つの発光素子とを設ける場合を示しているが、通信光の光量をより細かく表示できる、つまり検知部で検出した光量をそのままの値で出力する発光素子を備えるようにしてもよい。   1 and 2 show the case where four light emitting elements that output the amount of communication light and one light emitting element that displays the presence or absence of communication light are provided, the amount of communication light can be displayed more finely. That is, you may make it provide the light emitting element which outputs the light quantity detected by the detection part with the value as it is.

光検知器１を接続する光コネクタ３の一例を説明する。   An example of the optical connector 3 for connecting the photodetector 1 will be described.

図２に示すように、光コネクタ３は、サーバ等の伝送装置間を接続する光伝送路中に設けられその光伝送路同士を光接続すべく、コネクタ本体１２内に光伝送路と光結合するコア部及びクラッド部を有する接合体１３を備える。なお、コア部及びクラッド部の各外径は、伝送損失の発生を抑制するという点で、光伝送路（例えば光ファイバ）のコア及びクラッドの各外径と等しいことが好ましい。   As shown in FIG. 2, the optical connector 3 is provided in an optical transmission path that connects between transmission devices such as servers, and is optically coupled to the optical transmission path in the connector body 12 so as to optically connect the optical transmission paths. And a joined body 13 having a core part and a clad part. In addition, it is preferable that each outer diameter of a core part and a clad part is equal to each outer diameter of the core of a optical transmission line (for example, optical fiber) and a clad at the point that generation | occurrence | production of transmission loss is suppressed.

接合体１３の両端部外周は、コネクタ本体１２内に収容されたスリーブ１４，１５にそれぞれ嵌入され、固定される。接合体１３の両端面には、光コネクタ３の使用時に、一方の伝送装置側のＳＣコネクタが備える円筒状のフェルールと他方の伝送装置側のＳＣコネクタが備える円筒状のフェルールがそれぞれ挿入されて突き合わせ接続される。一方の伝送装置側のフェルールには光伝送路である一方の伝送装置側の光ファイバが内蔵され、他方の伝送装置側のフェルールには光伝送路である他方の伝送装置側の光ファイバが内蔵される。接合体１３の外径は、一方の伝送装置側及び他方の伝送装置側のフェルールの外径と同じであり、接合体１３のコア部及びクラッド部が光伝送路である一方の伝送装置側及び他方の伝送装置側の光ファイバと同一直線状となるように配置されている。   The outer periphery of both ends of the joined body 13 is fitted and fixed to sleeves 14 and 15 accommodated in the connector main body 12, respectively. When the optical connector 3 is used, the cylindrical ferrule included in the SC connector on one transmission device side and the cylindrical ferrule included in the SC connector on the other transmission device side are respectively inserted into both end surfaces of the joined body 13. Butt connected. The ferrule on one transmission device side contains an optical fiber on one transmission device side that is an optical transmission line, and the ferrule on the other transmission device side contains an optical fiber on the other transmission device side that is an optical transmission line. Is done. The outer diameter of the joined body 13 is the same as the outer diameter of the ferrule on one transmission device side and the other transmission device side, and the one transmission device side in which the core portion and the clad portion of the joined body 13 are optical transmission paths, and It is arranged so as to be collinear with the optical fiber on the other transmission device side.

接合体１３は、コア部を伝搬する通信光の一部を取り出すための光取り出し手段２を構成している。光取り出し手段２は、通信光の一部を光検知器１側（の方向）へ取り出すものである。   The joined body 13 constitutes a light extraction means 2 for extracting a part of communication light propagating through the core portion. The light extraction means 2 extracts a part of communication light to the light detector 1 side (direction).

光取り出し手段２は、例えば、接合体１３の受光部４と対向する位置に、接合体１３の表面からコア部までを少なくとも貫通するように、通信光の一部を漏洩光として取り出すための光検知用溝を形成して構成される。光検知用溝は、受光部４と対向する位置の接合体１３に、受光部４の受光面に対して垂直に形成され、縦断面視で略矩形状（凹状）に形成される。なお、光取り出し手段２は、光検知用溝を形成した接合体１３に限るものではなく種々の変更が可能である。   The light extraction means 2 is, for example, light for extracting a part of communication light as leakage light so as to penetrate at least from the surface of the bonded body 13 to the core at a position facing the light receiving section 4 of the bonded body 13. It is configured by forming a detection groove. The light detection groove is formed perpendicular to the light receiving surface of the light receiving unit 4 in the joined body 13 at a position facing the light receiving unit 4, and is formed in a substantially rectangular shape (concave shape) in a longitudinal sectional view. The light extraction means 2 is not limited to the joined body 13 in which the light detection grooves are formed, and various modifications can be made.

光取り出し手段２である接合体１３を収容するコネクタ本体１２は、角形筒状であり、一端部（図２では左側）が例えば一方の伝送装置側の光コネクタアダプタ１６となり、他端部（図２では右側）が他方の伝送装置側の光コネクタアダプタ１７となる。   The connector main body 12 that accommodates the joined body 13 that is the light extraction means 2 has a rectangular tube shape, and one end portion (left side in FIG. 2) becomes, for example, the optical connector adapter 16 on one transmission device side, and the other end portion (see FIG. 2 is the optical connector adapter 17 on the other transmission apparatus side.

コネクタ本体１２内の中央部には、２つのスリーブ１４，１５と、これらスリーブ１４，１５間の内側に保持される接合体１３とが収容される。コネクタ本体１２内の接合体１３の上部には、光取り出し手段２で一部を取り出した通信光を光検知器１に出力するための光出力ポート１８が形成される。   Two sleeves 14, 15 and a joined body 13 held inside the sleeves 14, 15 are accommodated in the central portion in the connector main body 12. An optical output port 18 for outputting communication light partially extracted by the light extraction means 2 to the photodetector 1 is formed on the upper part of the joined body 13 in the connector main body 12.

光出力ポート１８は、光取り出し手段２からの出力（漏洩光）を光検知器１に出力すると共に、その光検知器１をコネクタ本体１２に対して着脱自在に挿抜する検知孔１９からなる。この検知孔１９に異物が入り込むのを防止するため、コネクタ本体１２には、コネクタ本体１２に光検知器１が取り付けられていないときに、検知孔１９に異物が入り込むのを防止するカバー２０が開閉自在に設けられ、そのカバー２０には、検知孔１９に嵌合する円柱状の防塵栓２１が形成される。   The light output port 18 includes a detection hole 19 for outputting the output (leakage light) from the light extraction means 2 to the light detector 1 and for detachably inserting the light detector 1 with respect to the connector main body 12. In order to prevent foreign matter from entering the detection hole 19, the connector body 12 has a cover 20 that prevents foreign matter from entering the detection hole 19 when the optical detector 1 is not attached to the connector body 12. The cover 20 is provided with a cylindrical dustproof stopper 21 that fits into the detection hole 19.

また、コネクタ本体１２の側面には、光検知器１を取り付ける際に、光検知器１の受光部４を光出力ポート１８の検知孔１９にガイドして、光検知器１の位置決めを行うためのガイド溝１０が形成される。   Further, when the photodetector 1 is attached to the side surface of the connector main body 12, the photodetector 1 is positioned by guiding the light receiving portion 4 of the photodetector 1 to the detection hole 19 of the light output port 18. The guide groove 10 is formed.

本実施の形態に係る光検知器１の作用を説明する。   The operation of the photodetector 1 according to the present embodiment will be described.

光検知器１にて通信光の検知を行う際は、光コネクタ３のカバー２０を開けて光出力ポート１８を露出させた後、光検知器１の脚部１１を光コネクタ３のガイド溝１０に沿って挿入する。すると、光検知器１の筐体７の底面から突出した受光部４が、位置決めされた状態で光出力ポート１８である検知孔１９に収容される。この状態で、電源スイッチ９をＯＮにすることで、通信光の検知が可能となる。   When the communication light is detected by the optical detector 1, the cover 20 of the optical connector 3 is opened to expose the optical output port 18, and then the leg 11 of the optical detector 1 is inserted into the guide groove 10 of the optical connector 3. Insert along. Then, the light receiving portion 4 protruding from the bottom surface of the housing 7 of the light detector 1 is accommodated in the detection hole 19 that is the light output port 18 in a positioned state. In this state, the communication light can be detected by turning on the power switch 9.

光検知器１では、受光部４にて、光コネクタ３の光取り出し手段２からの漏洩光を受光すると共に受光した漏洩光を電気信号に変換する。検知部では、受光部４にて受光した漏洩光の光量を検知し、その検知した漏洩光の光量に基づいて通信光の光量を検知（算出）する。例えば、光コネクタ３の光取り出し手段２が通信光の１／１０００の漏洩光を取り出すように設計されているとすると、検知した漏洩光の光量を１０００倍すれば通信光の光量を算出することができ、通信光の光量を得られる。   In the photodetector 1, the light receiving unit 4 receives the leaked light from the light extraction means 2 of the optical connector 3 and converts the received leaked light into an electrical signal. The detection unit detects the amount of leaked light received by the light receiving unit 4 and detects (calculates) the amount of communication light based on the detected amount of leaked light. For example, if the light extraction means 2 of the optical connector 3 is designed to extract leakage light that is 1/1000 of communication light, the amount of communication light can be calculated by multiplying the amount of detected leakage light by 1000. The amount of communication light can be obtained.

通信光の光量が得られたら、その光量を光量表示部５で表示する。すなわち、検知部で検知した通信光の光量に基づいて発光素子を発光させる。例えば、光量が−１０ｄＢｍであれば−１０ｄＢｍを表示する発光素子を発光させ、光量が検出できない（漏洩光がない、或いは極めて小さい）ときにはＯＦＦを表示する発光素子を発光させる。この発光素子の選択は既知のブリッジ回路等で実現すればよい。   When the amount of communication light is obtained, the amount of light is displayed on the light amount display unit 5. That is, the light emitting element is caused to emit light based on the amount of communication light detected by the detection unit. For example, if the amount of light is −10 dBm, the light emitting element that displays −10 dBm emits light. If the amount of light cannot be detected (there is no leakage light or is extremely small), the light emitting element that displays OFF is emitted. The selection of the light emitting element may be realized by a known bridge circuit or the like.

このように、本実施の形態に係る光検知器１によれば、漏洩光の光量から検知した通信光の光量を出力する出力手段を備えるため、通信光の有無に加えて通信光の光量をも検知することが可能となる。   As described above, according to the photodetector 1 according to the present embodiment, since the output unit that outputs the light amount of the communication light detected from the light amount of the leaked light is provided, the light amount of the communication light is determined in addition to the presence / absence of the communication light. Can also be detected.

また、光検知器１は、漏洩光を受光すると共に受光した漏洩光を電気信号に変換する受光部４と、受光部４にて受光した漏洩光の光量を検知し、その漏洩光の光量に基づいて通信光の光量を検知して出力する検知部とを備え、出力手段が検知部にて検知した通信光の光量を表示する光量表示部５で構成されるため、簡易な構造で通信光の光量の表示を実現することができる。   In addition, the light detector 1 receives the leaked light and converts the received leaked light into an electrical signal, and detects the amount of leaked light received by the light receiving unit 4, and determines the amount of leaked light. A detection unit that detects and outputs the amount of communication light based on the output unit, and the output unit includes a light amount display unit 5 that displays the amount of communication light detected by the detection unit. Display of the amount of light can be realized.

また、光量表示部５により、少なくとも表示された（発光された）通信光の光量の値以上の光量が得られている（検知されている）ことがわかる。したがって、光伝送路を伝搬する通信光の光量を検知し、この検知した光量を通信光の初期の光量と比較することにより、光伝送路における光損失の発生の有無を知ることができ、これにより光伝送路の劣化等を判別し、通信障害等の問題が生じる前に、光損失が発生した光伝送路の交換や切り替え等の措置を講じることができ、従来の光検知器よりも光通信関連設備の保守性や運用効率を向上させることができる。   Further, it can be seen that the light quantity display unit 5 has obtained (detected) a light quantity that is at least equal to the light quantity of the displayed (emitted) communication light. Therefore, by detecting the amount of communication light propagating through the optical transmission line and comparing the detected light amount with the initial amount of communication light, it is possible to know whether or not light loss has occurred in the optical transmission line. Can be used to determine the degradation of the optical transmission line, and take measures such as replacement or switching of the optical transmission line where the optical loss has occurred before problems such as communication failure occur. Maintainability and operational efficiency of communication-related facilities can be improved.

さらに、本実施の形態では、光検知器１と光コネクタ３とを別体としているため、通信光の有無や通信光の光量を確認する必要があるときだけ光検知器１を取り付けることができ、常時は光検知器１を別体として取り外しておくことができる。そのため、光検知器１が１台あれば複数の光コネクタ３の通信光を検知することができる。データセンタや局舎などの光通信関連設備では、非常に多くの光コネクタを用いている場合が多く、光検知器１と光コネクタ３を一体とした場合に比べて光検知器に係るコストを大幅に削減することが可能となる。   Further, in the present embodiment, since the photodetector 1 and the optical connector 3 are separated, the photodetector 1 can be attached only when it is necessary to check the presence or absence of communication light or the amount of communication light. The photo detector 1 can be removed as a separate unit at all times. Therefore, if there is one optical detector 1, communication light from a plurality of optical connectors 3 can be detected. Optical communication-related facilities such as data centers and office buildings often use an extremely large number of optical connectors, and the cost associated with the optical detector is lower than when the optical detector 1 and the optical connector 3 are integrated. It becomes possible to reduce significantly.

本実施の形態では、発光素子にて通信光の有無や通信光の光量を出力するものとしたが、表示方法はこれに限られず、ＬＣＤ（液晶ディスプレイ）を用いて文字情報として表示するようにしてもよい。   In the present embodiment, the light emitting element outputs the presence / absence of communication light and the amount of communication light, but the display method is not limited to this, and it is displayed as character information using an LCD (liquid crystal display). May be.

次に、本発明の他の実施の形態を図３、図４にしたがって説明する。図３、図４では、図１の光検知器１の各部材と同様の機能を有するものには図１と同じ符号を付すものとする。   Next, another embodiment of the present invention will be described with reference to FIGS. 3 and 4, the same reference numerals as those in FIG. 1 are given to those having the same functions as those of the members of the photodetector 1 in FIG. 1.

図３に示すように、本発明の他の実施の形態に係る光検知器１００は、図１、図２の光検知器１において、受光部４にて受光した漏洩光から装置識別信号を検知し、この検知した装置識別信号に含まれる識別番号（識別Ｎｏ．）から装置識別情報を取得する装置識別部と、装置識別部で取得した装置識別情報を表示する識別情報表示部１０１とをさらに備えたものである。なお、装置識別部は、検知部に設けられていてもよく、また、検知部とは別に設けられていてもよい。   As shown in FIG. 3, the photodetector 100 according to another embodiment of the present invention detects a device identification signal from the leaked light received by the light receiving unit 4 in the photodetector 1 of FIGS. 1 and 2. A device identification unit that acquires device identification information from an identification number (identification No.) included in the detected device identification signal, and an identification information display unit 101 that displays the device identification information acquired by the device identification unit. It is provided. In addition, the apparatus identification part may be provided in the detection part, and may be provided separately from the detection part.

装置識別信号は、伝送装置間で通常に送受信されるフレームでもよいし、伝送装置間で装置識別用の専用の信号を定期的に送信させるようにしてもよい。この装置識別信号から読み取る識別番号とは、例えば、専用のフレームに格納した値や、送信フレーム中のディスティネーションアドレスやセンドアドレスなどの領域に格納されるＭＡＣアドレスやＩＰアドレスのことである。   The device identification signal may be a frame that is normally transmitted and received between the transmission devices, or a dedicated signal for device identification may be periodically transmitted between the transmission devices. The identification number read from the device identification signal is, for example, a value stored in a dedicated frame, or a MAC address or IP address stored in an area such as a destination address or a send address in a transmission frame.

装置識別部は、無線或いは有線により外部装置（データベースなど）と通信する通信手段を備える。識別情報表示部１０１は、光検知器１００の筐体７の上面に設けられる。識別情報表示部１０１は、ＬＣＤ（液晶ディスプレイ）などの文字情報表示機能を有するものからなる。外部装置は、装置識別信号に対応する装置識別情報を予めデータベースとして記憶させた通信手段を有するデータベースサーバ等のことである。装置識別情報とは、例えば、通信光を検知している光コネクタに接続されている伝送装置（接続装置）や回線Ｎｏ．、その回線に用いられている光ファイバの種別、その光ファイバの伝送速度などのことである。   The device identification unit includes a communication unit that communicates with an external device (such as a database) wirelessly or by wire. The identification information display unit 101 is provided on the upper surface of the housing 7 of the photodetector 100. The identification information display unit 101 has a character information display function such as an LCD (liquid crystal display). The external device is a database server or the like having communication means in which device identification information corresponding to a device identification signal is stored in advance as a database. The device identification information is, for example, a transmission device (connection device) connected to an optical connector that detects communication light or a line No. The type of optical fiber used in the line, the transmission speed of the optical fiber, and the like.

本発明の他の実施の形態に係る光検知器１００の作用を説明する。   The operation of the photodetector 100 according to another embodiment of the present invention will be described.

この光検知器１００は、受光部４で漏洩光を受光すると、装置識別部により漏洩光から装置識別信号を読み取る（例えば、センドアドレスの領域を参照して送信元アドレスを取得する）。図４に示すように、装置識別部は、その通信手段によって、漏洩光から読み取った識別番号（例えば、送信元アドレス）を外部装置に送信する。外部装置は、装置識別部から送信された識別番号を受信した後、自身に記憶されたデータベース１０２を参照して識別番号と対応する装置識別情報を抽出し、この装置識別情報を光検知器１に送信する。   When the light receiving unit 4 receives leaked light, the photodetector 100 reads a device identification signal from the leaked light by the device identifying unit (for example, acquires a transmission source address by referring to a send address area). As illustrated in FIG. 4, the device identification unit transmits an identification number (for example, a transmission source address) read from the leaked light to the external device by the communication unit. After receiving the identification number transmitted from the device identification unit, the external device extracts the device identification information corresponding to the identification number with reference to the database 102 stored in the external device. Send to.

例えば、外部装置が、装置識別部から識別番号として「００２」を受信した場合、データベース１０２を参照して、識別番号「００２」に対応する接続装置「ＡＡＢ」、回線Ｎｏ．「２ｂ−２ｂ」、光ファイバ種別「ＭＭＦ（５０：コア径）」、伝送速度「１Ｇｂｐｓ」を抽出し、これらの装置識別情報を光検知器１に送信する。   For example, when the external device receives “002” as the identification number from the device identification unit, the database 102 is referred to and the connection device “AAB”, line No. corresponding to the identification number “002” is referred to. “2b-2b”, the optical fiber type “MMF (50: core diameter)”, and the transmission speed “1 Gbps” are extracted, and the device identification information is transmitted to the photodetector 1.

そして、光検知器１の装置識別部は、外部装置から送信された装置識別情報を受信して、得られた装置識別情報を識別情報表示部１０１に表示する。また、光量表示部５には通信光の光量が表示される。   The device identification unit of the photodetector 1 receives the device identification information transmitted from the external device, and displays the obtained device identification information on the identification information display unit 101. Further, the light amount display unit 5 displays the light amount of communication light.

このように、本発明の光検知器１００によれば、受光部４にて受光した漏洩光から装置識別信号を検知し、この検知した装置識別信号に含まれる識別番号から装置識別情報を取得する装置識別部と、装置識別部で取得した装置識別情報を表示する識別情報表示部１０１とをさらに備えるため、通信光の有無、及び光損失の発生の有無を知ることができると共に、通信光の光量、さらには装置識別情報を検知することができる。   Thus, according to the photodetector 100 of the present invention, the device identification signal is detected from the leaked light received by the light receiving unit 4, and the device identification information is acquired from the identification number included in the detected device identification signal. Since it further comprises a device identification unit and an identification information display unit 101 for displaying the device identification information acquired by the device identification unit, it is possible to know the presence or absence of communication light and the occurrence of light loss, and the communication light It is possible to detect the amount of light and further the device identification information.

光検知器１００では、データベース１０２が外部装置に記憶されているとしたが、光検知器１００自体にデータベース１０２を備えていてもよい。例えば、回路基板６にメモリ部を設け、そのメモリ部にデータベース１０２を記憶させておき、装置識別情報を得る際にはメモリ部に記憶されたデータベース１０２を照会するようにしてもよい。   In the light detector 100, the database 102 is stored in the external device. However, the light detector 100 itself may include the database 102. For example, a memory unit may be provided on the circuit board 6 and the database 102 may be stored in the memory unit, and the database 102 stored in the memory unit may be referred to when obtaining device identification information.

次に、光検知器１（或いは光検知器１００）を用いた光伝送システムを図５で説明する。   Next, an optical transmission system using the photodetector 1 (or the photodetector 100) will be described with reference to FIG.

図５に示すように、本発明の光伝送システム２００は、本発明の光検知器１（或いは光検知器１００）を用い、光伝送路の複数箇所で通信光の光量を計測することにより、損失発生箇所を特定できるようにしたシステムである。   As shown in FIG. 5, the optical transmission system 200 of the present invention uses the optical detector 1 (or the optical detector 100) of the present invention, and measures the amount of communication light at a plurality of locations on the optical transmission path. This is a system that can identify the location of loss.

この光伝送システム２００では、Ａ区域に伝送装置Ｉ〜IVが配置され、Ｂ区域に伝送装置Ｖ，VIが配置され、Ｃ区域に伝送装置VII，VIIIが配置される。伝送装置ＩはＢ区域の伝送装置VIに接続されている。同様に、伝送装置IIは伝送装置Ｖに接続され、伝送装置IIIは伝送装置VIIに接続され、伝送装置IVは伝送装置VIIIに接続されている。このように、伝送装置同士が一対一で接続されている。   In this optical transmission system 200, transmission apparatuses I to IV are arranged in the A area, transmission apparatuses V and VI are arranged in the B area, and transmission apparatuses VII and VIII are arranged in the C area. The transmission apparatus I is connected to the transmission apparatus VI in the B area. Similarly, the transmission device II is connected to the transmission device V, the transmission device III is connected to the transmission device VII, and the transmission device IV is connected to the transmission device VIII. In this way, the transmission apparatuses are connected one to one.

これらの伝送装置を接続する光伝送路中のＸ〜Ｚ地点にはそれぞれ光コネクタ３が設けられている。但し、伝送装置IIIと伝送装置VIIとを接続する光伝送路ではＸ地点及びＹ地点の２箇所のみに光コネクタ３が設けられている。   An optical connector 3 is provided at each of the X to Z points in the optical transmission line connecting these transmission devices. However, in the optical transmission path connecting the transmission device III and the transmission device VII, the optical connectors 3 are provided only at two locations, the X point and the Y point.

図５において、損失発生箇所の特定手順を具体的に説明すると、各光伝送装置同士を接続する各光伝送路中のＸ〜Ｚ地点に設けられた各光コネクタ３に光検知器１を順次接続して各地点での通信光の光量を計測し、光量が想定外に低下する区間を損失発生箇所として特定する。図５の例では、伝送装置Ｉと伝送装置VIを接続する光伝送路のＸ地点とＹ地点との間に損失発生箇所があり、Ｘ地点及びＹ地点での通信光の光量を比較することで、この区間内に損失発生箇所が存在すると特定できる。   In FIG. 5, the specific procedure for identifying the loss occurrence location will be described in detail. The optical detectors 1 are sequentially connected to the optical connectors 3 provided at the X to Z points in the optical transmission lines connecting the optical transmission devices. Connect to measure the amount of communication light at each point, and identify the section where the amount of light falls unexpectedly as a loss occurrence point. In the example of FIG. 5, there is a loss occurrence point between the X point and the Y point of the optical transmission line connecting the transmission device I and the transmission device VI, and the amount of communication light at the X point and the Y point is compared. Thus, it can be specified that there is a loss occurrence point in this section.

このように、本発明の光伝送システム２００によれば、損失発生後、光検知器１で光伝送路の複数の地点での通信光の光量を計測することで、従来では特定困難であった損失発生箇所が特定できる。   As described above, according to the optical transmission system 200 of the present invention, it is conventionally difficult to specify the light amount of communication light at a plurality of points on the optical transmission path after the loss has occurred by the photodetector 1. The location of loss can be identified.

また、光伝送システム２００において、各光コネクタ３に光検知器１を常時接続しておくか、定期的に光検知器１で通信光の光量を検知しておくことで、各地点での通信光の光量を経時的に観測することができるので、光伝送路の劣化及びその劣化箇所を特定できる。よって、光伝送路の劣化に応じて光伝送路の交換や切り替え等の措置を講じることで、光伝送路で通信障害が発生するのを事前に防ぐことができる。従って、光通信関連設備の保守性や運用効率を向上させることができる。   Further, in the optical transmission system 200, communication at each point is performed by always connecting the optical detector 1 to each optical connector 3 or by periodically detecting the amount of communication light by the optical detector 1. Since the amount of light can be observed over time, the degradation of the optical transmission path and the degradation location can be identified. Therefore, by taking measures such as replacement or switching of the optical transmission line according to the deterioration of the optical transmission line, it is possible to prevent a communication failure from occurring in the optical transmission line in advance. Accordingly, it is possible to improve the maintainability and operational efficiency of the optical communication related equipment.

上記実施の形態では、光検知器１と光コネクタ３を別体として説明したが、光検知器１と光コネクタ３は一体であってもよい。   In the said embodiment, although the photodetector 1 and the optical connector 3 were demonstrated as a different body, the photodetector 1 and the optical connector 3 may be integrated.

上記実施の形態においては、出力手段が光検知器に設けられて通信光の光量を表示する光量表示部からなる例で説明したが、これに限定されるものではなく、例えば、通信光の光量の表示や記憶（記録）などを行う光検知器とは別の場所に設置された外部媒体へ、漏洩光の光量から検知した通信光の光量を信号として出力する出力手段であってもよい。なお、このような場合には、例えば、光検知器と外部媒体とをケーブルなどの伝送線路を用いて接続して通信光の光量を含む信号を外部媒体へ出力したり、或いは、通信光の光量を含む信号を無線を用いて光検知器から外部媒体へ出力してもよい。   In the embodiment described above, the output unit is provided in the light detector and has been described with the example of the light amount display unit that displays the light amount of communication light. However, the present invention is not limited to this. For example, the light amount of communication light It may be an output means for outputting, as a signal, the amount of communication light detected from the amount of leaked light to an external medium installed at a location different from the light detector that performs display, storage (recording), and the like. In such a case, for example, a light detector and an external medium are connected using a transmission line such as a cable to output a signal including the amount of communication light to the external medium, or the communication light A signal including the amount of light may be output from an optical detector to an external medium using wireless communication.

１ 光検知器
２ 光取り出し手段
３ 光コネクタ 1 Photodetector 2 Light extraction means 3 Optical connector

Claims (6)

光伝送路同士を接続する部分に設けられて前記光伝送路を伝搬する通信光の一部を取り出す光取り出し手段を備えた光コネクタに接続され、前記光取り出し手段からの漏洩光を検知する光検知器において、
前記漏洩光の光量から検知した前記通信光の光量を出力する出力手段を備えたことを特徴とする光検知器。 Light that is provided at a portion that connects the optical transmission lines and is connected to an optical connector that includes a light extraction unit that extracts a part of communication light propagating through the optical transmission line, and detects light leaked from the light extraction unit In the detector
An optical detector comprising output means for outputting the amount of communication light detected from the amount of leaked light. 前記漏洩光を受光する受光部と、該受光部にて受光した前記漏洩光の光量を検知し、前記漏洩光の光量に基づいて前記通信光の光量を検知して出力する検知部とをさらに備え、前記出力手段は、前記検知部にて検知した前記通信光の光量を表示する光量表示部を有する請求項１に記載の光検知器。   A light receiving unit that receives the leaked light, and a detection unit that detects the amount of the leaked light received by the light receiving unit and detects and outputs the amount of the communication light based on the amount of the leaked light. The light detector according to claim 1, further comprising: a light amount display unit that displays a light amount of the communication light detected by the detection unit. 前記光量表示部は、前記検知部にて検知された前記通信光の光量を含む所定範囲の通信光の光量の最低値が表示される請求項２に記載の光検知器。   The light detector according to claim 2, wherein the light amount display unit displays a minimum value of the communication light amount in a predetermined range including the light amount of the communication light detected by the detection unit. 前記受光部にて受光した前記漏洩光から装置識別信号を検知し、該装置識別信号に含まれる識別番号から装置識別情報を取得する装置識別部と、該装置識別部で取得した前記装置識別情報を表示する識別情報表示部とをさらに備える請求項１又は２に記載の光検知器。   A device identification unit that detects a device identification signal from the leaked light received by the light receiving unit and acquires device identification information from an identification number included in the device identification signal, and the device identification information acquired by the device identification unit The photodetector according to claim 1, further comprising: an identification information display unit that displays. 前記装置識別部は、外部装置に記憶されたデータベースと通信する通信手段を備え、該通信手段により前記装置識別番号を前記データベースと照会して前記装置識別情報を取得する請求項４に記載の光検知器。   5. The light according to claim 4, wherein the device identification unit includes a communication unit that communicates with a database stored in an external device, and obtains the device identification information by referring to the database for the device identification number by the communication unit. Detector. 光伝送路同士を接続する部分に設けられて前記光伝送路を伝搬する通信光の一部を取り出す光取り出し手段を備えた光コネクタが前記光伝送路の複数箇所に設けられており、請求項１〜５のいずれかに記載の光検知器が前記光コネクタに接続されることで前記光伝送路の複数箇所の前記通信光の光量が検知され、光損失の発生箇所が特定されることを特徴とする光伝送システム。   An optical connector provided with a light extraction means that is provided at a portion connecting the optical transmission lines and extracts a part of communication light propagating through the optical transmission line is provided at a plurality of locations of the optical transmission line. The light detector according to any one of 1 to 5 is connected to the optical connector so that the amount of the communication light at a plurality of locations of the optical transmission path is detected, and the location where the optical loss occurs is specified. A characteristic optical transmission system.
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