JP2011085553A - Light loss measuring method and light loss measuring device - Google Patents

Light loss measuring method and light loss measuring device Download PDF

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JP2011085553A
JP2011085553A JP2009240524A JP2009240524A JP2011085553A JP 2011085553 A JP2011085553 A JP 2011085553A JP 2009240524 A JP2009240524 A JP 2009240524A JP 2009240524 A JP2009240524 A JP 2009240524A JP 2011085553 A JP2011085553 A JP 2011085553A
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optical loss
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JP5560647B2 (en
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Yoshihito Amakawa
善仁 天川
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Yokogawa Electric Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To achieve a light loss measuring method and device capable of effectively performing a multicore optical fiber installation checking operation by minimizing the contact between an operator on a light source side and an operator on a light source side on a light power meter side as to which core wire of an optical fiber is to be measured. <P>SOLUTION: For measurement of light loss of each core wire of an installed multicore optical fiber by connecting a light source to one end of each core wire of the multicore optical fiber and a light power meter to the other end and adjusting the measurement conditions of the light source and light power meter, one core wire of the multicore optical fiber is used for information transmission, and measurement information of various types including measurement conditions necessary for light loss measurement of other core wires and measurement results is transferred through it. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、光損失測定方法および光損失測定装置に関し、詳しくは、多心光ファイバの敷設工事における光ファイバの敷設が正確に行われたことを確認する作業の効率化に有効な方法および装置に関するものである。   The present invention relates to an optical loss measuring method and an optical loss measuring apparatus, and more particularly, a method and an apparatus effective for improving the efficiency of work for confirming that optical fibers have been correctly laid in multi-core optical fiber laying work. It is about.

光ファイバの敷設工事では、光ファイバの敷設が正確に行われたか否かを確認するために、図６に示すように、敷設された光ファイバ１の一端に光出力パワーが既知の光源２を接続して他端に光パワーメータ（ＯＰＭ）３を接続し、光パワーメータ３の測定値が損失を許容する一定以内のレベルにあるか否かを判断することが行われている。   In the laying work of the optical fiber, in order to confirm whether or not the laying of the optical fiber has been performed correctly, as shown in FIG. 6, a light source 2 whose optical output power is known is provided at one end of the laid optical fiber 1. An optical power meter (OPM) 3 is connected to the other end and a determination is made as to whether or not the measured value of the optical power meter 3 is within a certain level that allows loss.

また、測定にあたっては、光源２の出力波長を切り替えることにより、複数の波長について測定することも行われている。   In measurement, the output wavelength of the light source 2 is switched to measure a plurality of wavelengths.

一般に光ファイバケーブル１としては、複数の心線よりなる多心光ファイバを用いることが多い。したがって、このような光ファイバケーブルの敷設工事にあたっては、一度に測定する心線数が１００本、２００本と非常に多くなり、効率よく測定することが求められる。   In general, as the optical fiber cable 1, a multi-core optical fiber composed of a plurality of core wires is often used. Therefore, in laying such an optical fiber cable, the number of cores to be measured at one time is as large as 100 or 200, and it is required to measure efficiently.

ところで、敷設する光ファイバケーブルの長さに着目すると、数1００ｍから数1００Ｋｍ超と長短さまざまであるが、大半の敷設確認作業はそれぞれ光損失測定装置を携帯した作業者が光源側と光パワーメータ側に別れて行うことになる。この場合、光源側と光パワーメータ側とで、光出力パワーや出力波長などの測定条件を一致させておく必要がある。   By the way, when paying attention to the length of the optical fiber cable to be laid, there are various lengths ranging from several hundred meters to over several hundred kilometers, but most of the laying confirmation work is performed by the operator carrying the optical loss measuring device respectively on the light source side and the optical power meter. Will be done separately. In this case, it is necessary to match measurement conditions such as optical output power and output wavelength on the light source side and the optical power meter side.

ある種の光損失測定装置では、同じ種類の測定装置を使用する場合には、光源側から光パワーメータ側に次に測定する波長を自動的に設定できるように構成されていて、光源・光パワーメータ間における測定条件についての作業者相互間の連絡を取り合わなくてもよいようにしている。   Some types of optical loss measurement devices are configured so that the next wavelength to be measured can be automatically set from the light source side to the optical power meter side when the same type of measurement device is used. There is no need to keep communication between workers about measurement conditions between power meters.

このような光損失測定装置を用いることで測定条件を一致させるための作業者相互間の連絡は不要にできるが、光ファイバケーブルの多数ある心線の中から次にどの心線を測定するべきかについては、光源側と光パワーメータ側光源側の作業者相互間が連絡を取り合わなければならない。   By using such an optical loss measuring device, it is possible to eliminate the need for communication between workers to match the measurement conditions, but which one of the many cores of the optical fiber cable should be measured next. For this, the workers on the light source side and the optical power meter side light source side must communicate with each other.

現状では、一般に携帯電話を使用し、次にどの心線を測定するのかを伝達しあっているが、作業現場によっては、マンホールの中などのように携帯電話の電波が届かない場所もある。   At present, a mobile phone is generally used, and the core wire to be measured next is communicated, but depending on the work site, there are places where the mobile phone's radio waves do not reach, such as in a manhole.

特許文献１には、多心光ファイバの各心線の入力側における整列順と出力側における整列順との一致の確認を短時間に簡単かつ正確に測定する方法および装置について記載されている。   Patent Document 1 describes a method and an apparatus for measuring easily and accurately in a short time the confirmation of matching between the alignment order on the input side and the alignment order on the output side of each core wire of a multi-core optical fiber.

特開２０００−２４９６２４号公報JP 2000-249624 A

本発明は、このような問題点を解決するものであり、その目的は、多心光ファイバのどの心線を測定するのかについての光源側と光パワーメータ側光源側の作業者相互間の連絡を最小限にして、多心光ファイバの敷設確認作業を効率よく行える光損失測定方法および装置を実現することにある。   The present invention solves such problems, and its purpose is to communicate between the workers on the light source side and the optical power meter side light source side about which core wire of a multi-core optical fiber is to be measured. It is an object to realize an optical loss measuring method and apparatus that can efficiently perform the work of confirming the laying of a multi-fiber optical fiber.

上記目的を達成するために、本発明のうち請求項１に記載の発明は、
敷設された多心光ファイバの心線の一端に光源を接続して他端に光パワーメータを接続し、これら光源と光パワーメータの測定条件を合わせて前記多心光ファイバの各心線の光損失を測定するのにあたり、
前記多心光ファイバの心線の一本を情報伝送用として用い、他の心線の光損失測定に必要な測定条件および測定結果を含む各種測定情報の授受を行うことを特徴とする光損失測定方法である。 In order to achieve the above object, the invention described in claim 1 of the present invention is:
A light source is connected to one end of the core of the multi-core optical fiber laid, and an optical power meter is connected to the other end. The measurement conditions of the light source and the optical power meter are adjusted to match each of the cores of the multi-core optical fiber. In measuring optical loss,
An optical loss characterized in that one of the cores of the multi-core optical fiber is used for information transmission, and various measurement information including measurement conditions and measurement results necessary for optical loss measurement of other cores is exchanged. This is a measurement method.

請求項２記載の発明は、請求項１に記載の光損失測定方法で用いられる光損失測定装置であって、
一方をマスタとして他方をスレーブとする２台の光損失測定装置のそれぞれに測定条件が共通する光源と光パワーメータが設けられ、
前記マスタの光源は前記情報伝送用心線の一端に接続されて光パワーメータは光損失測定対象となる他の心線の一端に接続され、
前記スレーブの光パワーメータは前記情報伝送用心線の他端に接続されて光源は光損失測定対象となる他の心線の他端に接続されることを特徴とする。 Invention of Claim 2 is an optical loss measuring apparatus used with the optical loss measuring method of Claim 1, Comprising:
A light source and an optical power meter having common measurement conditions are provided for each of the two optical loss measuring apparatuses, one of which is a master and the other is a slave.
The light source of the master is connected to one end of the core wire for information transmission, and the optical power meter is connected to one end of another core wire to be measured for optical loss,
The slave optical power meter is connected to the other end of the information transmission core, and the light source is connected to the other end of another core to be measured for optical loss.

請求項３に記載の発明は、
請求項２記載の光損失測定装置において、
前記各光損失測定装置には、前記情報伝送用心線を介してマスタとスレーブ間で授受される各種測定情報を表示する表示装置が設けられていることを特徴とする。 The invention according to claim 3
The optical loss measurement apparatus according to claim 2,
Each optical loss measurement device is provided with a display device for displaying various measurement information exchanged between a master and a slave via the information transmission core.

本発明によれば、多心光ファイバの敷設確認作業を効率よく行える。   ADVANTAGE OF THE INVENTION According to this invention, the installation confirmation operation | work of multi-core optical fiber can be performed efficiently.

本発明で用いる光損失測定装置の一実施例を示すブロック図である。It is a block diagram which shows one Example of the optical loss measuring apparatus used by this invention. 本発明に基づく多心光ファイバの光損失測定方法の概念説明図である。It is a conceptual explanatory drawing of the optical loss measuring method of the multi-core optical fiber based on this invention. 図２の動作の流れを説明する動作遷移説明図である。FIG. 3 is an operation transition explanatory diagram illustrating an operation flow of FIG. 2. マスタ側の光損失測定装置における表示画面例図である。It is an example of a display screen in the optical loss measuring device on the master side. スレーブ側の光損失測定装置における表示画面例図である。It is an example of a display screen in the optical loss measuring device on the slave side. 従来の多心光ファイバの光損失測定方法の概念構成図である。It is a conceptual block diagram of the optical loss measuring method of the conventional multi-core optical fiber.

以下、図面を参照して、本発明を詳細に説明する。図１は、本発明で用いる光損失測定装置の一実施例を示すブロック図である。図１に示すように、本発明に係る光損失測定装置１０は、従来と同様な出力波長を選択できるたとえばレーザーダイオードの光源１１と光パワーメータ１２を備えている。   Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of an optical loss measuring apparatus used in the present invention. As shown in FIG. 1, an optical loss measurement apparatus 10 according to the present invention includes a light source 11 of a laser diode and an optical power meter 12, for example, which can select an output wavelength similar to the conventional one.

光パワーメータ１２のアナログ出力信号は、Ａ／Ｄ変換器１３に入力されてデジタル信号に変換される。Ａ／Ｄ変換器１３から変換出力されるデジタル信号は、ＣＰＵ１４に接続されたメモリ１５に格納される。   The analog output signal of the optical power meter 12 is input to the A / D converter 13 and converted into a digital signal. The digital signal converted and output from the A / D converter 13 is stored in a memory 15 connected to the CPU 14.

ＣＰＵ１４には、メモリ１５の他に光源１１も接続されるとともに、測定データを格納するストレージ装置１６、測定結果や測定条件などを表示する表示装置１７、同一構成の他の光損失測定装置との間で各種情報の送受を行う通信制御部１８、ＣＰＵ１４に対して各種の命令を指示入力する操作部１９なども接続されている。   In addition to the memory 15, the light source 11 is connected to the CPU 14, a storage device 16 that stores measurement data, a display device 17 that displays measurement results and measurement conditions, and other optical loss measurement devices having the same configuration. A communication control unit 18 that transmits and receives various types of information between them, and an operation unit 19 that inputs and inputs various commands to the CPU 14 are also connected.

図２は、図１に示す光損失測定装置を用いた本発明に基づく多心光ファイバの光損失測定方法の概念説明図である。２台の光損失測定装置１０Ａと１０Ｂを用意し、一方の光損失測定装置たとえば１０Ａをマスタとして多心光ファイバ２０の一端に接続し、他方の光損失測定装置たとえば１０Ｂをスレーブとして多心光ファイバ２０の他端に接続する。   FIG. 2 is a conceptual explanatory diagram of the optical loss measurement method for a multi-core optical fiber based on the present invention using the optical loss measurement apparatus shown in FIG. Two optical loss measuring devices 10A and 10B are prepared, one optical loss measuring device, for example, 10A is used as a master and connected to one end of the multi-core optical fiber 20, and the other optical loss measuring device, for example, 10B is used as a slave for multi-core light. Connect to the other end of the fiber 20.

多心光ファイバ２０の多数ある心線のうちの一本を情報伝達用光ファイバ２０ｉとして使用し、その一端をマスタとして用いる光損失測定装置１０Ａの光源１１Ａに接続し、他端をスレーブとして用いる光損失測定装置１０Ｂの光パワーメータ１２Ｂに接続する。   One of the many cores of the multi-core optical fiber 20 is used as the information transmission optical fiber 20i, one end of which is connected to the light source 11A of the optical loss measuring apparatus 10A used as a master, and the other end is used as a slave. It connects with the optical power meter 12B of the optical loss measuring apparatus 10B.

多心光ファイバ２０の情報伝達用光ファイバ２０ｉ以外のその他の心線を測定対象として、それらの一端を１本ずつマスタとして用いる光損失測定装置１０Ａの光パワーメータ１２Ａに選択的に切り替えながら接続し、他端を光損失測定装置１０Ａから送られてくる情報に従ってスレーブとして用いる光損失測定装置１０Ｂの光源１１Ｂに選択的に切り替えながら接続する。   Connection is made while selectively switching to the optical power meter 12A of the optical loss measuring apparatus 10A that uses other cores other than the information transmission optical fiber 20i of the multi-core optical fiber 20 as a measurement target and uses one end of each as a master. Then, the other end is connected while selectively switching to the light source 11B of the optical loss measuring device 10B used as a slave according to the information sent from the optical loss measuring device 10A.

光損失測定装置１０Ａの動作を説明する。
光源１１Ａは、通信制御部１８Ａの制御および操作部１９Ａの設定操作に基づいて、スレーブとして用いる光損失測定装置１０Ｂの光パワーメータ１２Ｂに対して、
ａ）測定する心線番号
ｂ）測定条件
ｃ）測定結果
などを送信するための光による情報伝達手段として機能する。 The operation of the optical loss measuring apparatus 10A will be described.
The light source 11A is based on the control of the communication control unit 18A and the setting operation of the operation unit 19A with respect to the optical power meter 12B of the optical loss measuring device 10B used as a slave.
a) Core number to be measured b) Measurement conditions c) Functions as an information transmission means by light for transmitting measurement results and the like.

光パワーメータ１２Ａは、光ファイバの敷設が正確に行われたか否かを確認するための光損失測定手段の光パワーメータとして機能する。すなわち、測定対象である多心光ファイバ２０の心線を介して伝送されるスレーブとして用いる光損失測定装置１０Ｂの光源１１Ｂの出力光のレベルを測定する。   The optical power meter 12A functions as an optical power meter of an optical loss measuring means for confirming whether or not the optical fiber has been laid correctly. That is, the level of the output light of the light source 11B of the optical loss measuring apparatus 10B used as a slave transmitted through the core wire of the multi-core optical fiber 20 to be measured is measured.

光損失測定装置１０Ｂの動作を説明する。
光源１１Ｂは、光ファイバの敷設が正確に行われたか否かを確認するための光損失測定手段の光源として機能し、出力パワーが既知の出力光を測定対象である多心光ファイバ２０の心線の一端に入力する。 The operation of the optical loss measuring apparatus 10B will be described.
The light source 11B functions as a light source of an optical loss measuring unit for confirming whether or not the optical fiber has been laid correctly, and outputs the output light having a known output power from the core of the multi-core optical fiber 20 that is a measurement target. Enter at one end of the line.

光パワーメータ１２Ｂは、通信制御部１８Ｂの制御に基づき、光による情報伝達の受信手段として機能する。すなわち、光損失測定装置１０Ａの光源１１Ａから送られてくる情報にしたがって、自動または手動で光ファイバの敷設が正確に行われたか否かを確認するための各種測定条件の設定を行う。   The optical power meter 12B functions as a means for receiving information transmission by light based on the control of the communication control unit 18B. That is, according to the information sent from the light source 11A of the optical loss measurement apparatus 10A, various measurement conditions for confirming whether or not the optical fiber has been laid correctly or manually are set.

そして、次に測定すべき心線番号の情報を受け取り、表示装置１７Ｂの画面上に次に測定する光ファイバを光源１１Ｂ側に接続することを促すメッセージを表示する。   Then, the information on the core number to be measured next is received, and a message prompting to connect the optical fiber to be measured next to the light source 11B side is displayed on the screen of the display device 17B.

さらに、光損失測定装置１０Ａの測定結果を受け取り、表示装置１７Ｂの画面上に表示する。   Further, the measurement result of the optical loss measurement device 10A is received and displayed on the screen of the display device 17B.

図３は、図２の動作の流れを説明する動作遷移説明図である。
０）一連の動作を開始する前に、あらかじめ、マスタ側の光損失測定装置１０Ａとスレーブ側の光損失測定装置１０Ｂのユーザ（作業者）間で、情報伝達用の光ファイバ２０ｉとして多心光ファイバ２０の何番目の心線を用いるかを決めておく。 FIG. 3 is an operation transition explanatory diagram illustrating the operation flow of FIG.
0) Before starting a series of operations, the optical fiber 20i for information transmission between the users (operators) of the optical loss measuring apparatus 10A on the master side and the optical loss measuring apparatus 10B on the slave side is preliminarily light The number of the core wire of the fiber 20 is determined.

１）あらかじめ情報伝達用として決めておいた光ファイバを、マスタ側の光損失測定装置１０Ａでは光源１１Ａに接続し、スレーブ側の光損失測定装置１０Ｂでは光パワーメータ１２Ｂに接続する。   1) An optical fiber determined in advance for information transmission is connected to the light source 11A in the master-side optical loss measurement apparatus 10A, and is connected to the optical power meter 12B in the slave-side optical loss measurement apparatus 10B.

２）マスタ側の光損失測定装置１０Ａにおける表示装置１９Ａの表示画面上には、図４に示すような測定画面が表示される。マスタ側の作業者は、測定対象の光ファイバ（たとえば心線番号２３）を光パワーメータ１２Ａに接続する。そして、表示装置１９Ａの表示画面上に表示されている心線番号表から、測定対象として接続した心線番号２３を選択した後、表示画面上の「ロステスト開始」ボタンを押す。   2) A measurement screen as shown in FIG. 4 is displayed on the display screen of the display device 19A in the optical loss measurement device 10A on the master side. An operator on the master side connects an optical fiber to be measured (for example, a core number 23) to the optical power meter 12A. Then, after selecting the core number 23 connected as the measurement target from the core number table displayed on the display screen of the display device 19A, the “loss test start” button on the display screen is pressed.

３）マスタ側の光損失測定装置１０Ａは、光源１１Ａから出力される光信号を情報伝達手段として、測定心線番号および測定条件（波長、変調）などの情報をスレーブ側の光損失測定装置１０Ｂに送信する。   3) The master-side optical loss measurement device 10A uses the optical signal output from the light source 11A as information transmission means, and sends information such as the measurement core number and measurement conditions (wavelength, modulation) to the slave-side optical loss measurement device 10B. Send to.

４）スレーブ側の光損失測定装置１０Ｂは、マスタ側の光源１１Ａから送信された情報を含む光信号を光パワーメータ１２Ｂで受信する。スレーブ側の光損失測定装置１０Ｂにおける表示装置１９Ｂの表示画面上には、図５に示すような測定条件を設定するための測定画面が表示される。測定画面には、作業者に対して、測定する心線番号の光ファイバを光源側に接続することを促すメッセージが表示される。   4) The slave-side optical loss measurement device 10B receives an optical signal including information transmitted from the master-side light source 11A by the optical power meter 12B. A measurement screen for setting measurement conditions as shown in FIG. 5 is displayed on the display screen of the display device 19B in the optical loss measurement device 10B on the slave side. On the measurement screen, a message prompting the operator to connect the optical fiber having the core number to be measured to the light source side is displayed.

５）スレーブ側の作業者は、測定対象の光ファイバ（たとえば心線番号２３）を光パワーメータ１２Ｂに接続した後、表示画面上の「ロステスト開始」ボタンを押す。
６）スレーブ側の光損失測定装置１０Ｂは、光源１１Ｂから測定対象の光ファイバに対して光信号を出力する。 5) The worker on the slave side presses the “loss test start” button on the display screen after connecting the optical fiber to be measured (for example, the core number 23) to the optical power meter 12B.
6) The slave-side optical loss measurement device 10B outputs an optical signal from the light source 11B to the optical fiber to be measured.

７）マスタ側の光損失測定装置１０Ａは、光パワーメータ１２Ａで測定対象の光ファイバを介して伝送された光信号を受信し、光パワーの測定を実施する。
８）マスタ側の光損失測定装置１０Ａは、光パワーの測定が完了すると、測定結果を表示装置１９Ａの表示画面上に表示する。 7) The optical loss measuring apparatus 10A on the master side receives the optical signal transmitted through the optical fiber to be measured by the optical power meter 12A, and measures the optical power.
8) When the optical power measurement device 10A on the master side completes the measurement of the optical power, the measurement result is displayed on the display screen of the display device 19A.

９）さらに、マスタ側の光損失測定装置１０Ａは、７），８）の測定結果情報を、光源１１Ａから出力される光信号を介してスレーブ側の光損失測定装置１０Ｂに送信する。
１０）マスタ側の光損失測定装置１０Ａは測定処理を完了し、２）の状態に戻る。 9) Furthermore, the optical loss measurement device 10A on the master side transmits the measurement result information of 7) and 8) to the optical loss measurement device 10B on the slave side via the optical signal output from the light source 11A.
10) The optical loss measuring apparatus 10A on the master side completes the measurement process and returns to the state of 2).

１１）スレーブ側の光損失測定装置１０Ｂは、マスタ側の光源１１Ａから送信された測定結果情報を含む光信号を光パワーメータ１２Ｂで受信し、測定結果を表示装置１９Ｂの表示画面上に表示する。
１２）スレーブ側の光損失測定装置１０Ｂは測定処理を完了し、マスタ側の光損失測定装置１０Ａからの情報待機状態に戻る。 11) The optical loss measurement device 10B on the slave side receives the optical signal including the measurement result information transmitted from the light source 11A on the master side with the optical power meter 12B, and displays the measurement result on the display screen of the display device 19B. .
12) The slave-side optical loss measurement apparatus 10B completes the measurement process and returns to the information standby state from the master-side optical loss measurement apparatus 10A.

以上説明したように、本発明によれば、多心光ファイバのどの心線を測定するのかについての光源側と光パワーメータ側光源側の作業者相互間の連絡を最小限にでき、多心光ファイバの敷設確認作業を効率よく行える光損失測定方法および装置が実現できる。   As described above, according to the present invention, it is possible to minimize communication between workers on the light source side and the optical power meter side light source side as to which core wire of the multi-core optical fiber is measured. It is possible to realize an optical loss measurement method and apparatus that can efficiently perform the optical fiber laying confirmation work.

１０ 光損失測定装置
１１ 光源
１２ 光パワーメータ
１３ Ａ／Ｄ変換器
１４ ＣＰＵ
１５ メモリ
１６ ストレージ装置
１７ 表示装置
１８ 通信制御部
１９ 操作部 DESCRIPTION OF SYMBOLS 10 Optical loss measuring apparatus 11 Light source 12 Optical power meter 13 A / D converter 14 CPU
DESCRIPTION OF SYMBOLS 15 Memory 16 Storage apparatus 17 Display apparatus 18 Communication control part 19 Operation part

Claims (3)

敷設された多心光ファイバの心線の一端に光源を接続して他端に光パワーメータを接続し、これら光源と光パワーメータの測定条件を合わせて前記多心光ファイバの各心線の光損失を測定するのにあたり、
前記多心光ファイバの心線の一本を情報伝送用として用い、他の心線の光損失測定に必要な測定条件および測定結果を含む各種測定情報の授受を行うことを特徴とする光損失測定方法。 A light source is connected to one end of the core of the multi-core optical fiber laid, and an optical power meter is connected to the other end. The measurement conditions of the light source and the optical power meter are adjusted to match each of the cores of the multi-core optical fiber. In measuring optical loss,
An optical loss characterized in that one of the cores of the multi-core optical fiber is used for information transmission, and various measurement information including measurement conditions and measurement results necessary for optical loss measurement of other cores is exchanged. Measuring method. 請求項１に記載の光損失測定方法で用いられる光損失測定装置であって、
一方をマスタとして他方をスレーブとする２台の光損失測定装置のそれぞれに測定条件が共通する光源と光パワーメータが設けられ、
前記マスタの光源は前記情報伝送用心線の一端に接続されて光パワーメータは光損失測定対象となる他の心線の一端に接続され、
前記スレーブの光パワーメータは前記情報伝送用心線の他端に接続されて光源は光損失測定対象となる他の心線の他端に接続されることを特徴とする光損失測定装置装置。 An optical loss measurement device used in the optical loss measurement method according to claim 1,
A light source and an optical power meter having common measurement conditions are provided for each of the two optical loss measuring apparatuses, one of which is a master and the other is a slave.
The light source of the master is connected to one end of the core wire for information transmission, and the optical power meter is connected to one end of another core wire to be measured for optical loss,
The slave optical power meter is connected to the other end of the information transmission core, and the light source is connected to the other end of another core to be measured for optical loss. 前記各光損失測定装置には、前記情報伝送用心線を介してマスタとスレーブ間で授受される各種測定情報を表示する表示装置が設けられていることを特徴とする請求項２記載の光損失測定装置。   3. The optical loss according to claim 2, wherein each of the optical loss measuring devices is provided with a display device for displaying various measurement information exchanged between the master and the slave via the information transmission core. measuring device.
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