JP5511233B2

JP5511233B2 - Optical signal determination device, terminal device connection method, terminal device, and fixed wavelength light source selection method

Info

Publication number: JP5511233B2
Application number: JP2009145737A
Authority: JP
Inventors: 成人西; 弘一藤崎
Original assignee: NTT Electronics Corp
Current assignee: NTT Electronics Corp
Priority date: 2009-06-18
Filing date: 2009-06-18
Publication date: 2014-06-04
Anticipated expiration: 2029-06-18
Also published as: JP2011004178A

Description

本発明は、要求される上り光信号の波長を判定する光信号判定装置、波長分割多重型光伝送システムに端末装置を新たに接続する端末装置接続方法、その端末装置、及びその端末装置に組み込む固定波長光源を選択する固定波長光源選択方法に関する。 The present invention relates to an optical signal determination device for determining a wavelength of a required upstream optical signal, a terminal device connection method for newly connecting a terminal device to a wavelength division multiplexing optical transmission system, the terminal device, and the terminal device. The present invention relates to a fixed wavelength light source selection method for selecting a fixed wavelength light source.

局装置からの波長多重光信号を分波した下り光信号を複数の端末装置に結合し、前記端末装置からの上り光信号を合波して波長多重光信号を前記局装置に結合する波長分割多重型光伝送システム、例えば、ＷＤＭ−ＰＯＮ（ＷａｖｅｌｅｎｇｔｈＤｉｖｉｓｉｏｎＭｕｌｔｉｐｌｅｘｉｎｇ−ＰａｓｓｉｖｅＯｐｔｉｃａｌＮｅｔｗｏｒｋ）が提案されている。ＷＤＭ−ＰＯＮでは、加入者の増大に応じて端末装置を増やしていくことができる。このＷＤＭ−ＰＯＮに接続される端末装置としては、下り光信号に含まれる情報から上り光信号の波長を判断し、搭載した可変波長光源の光をその波長になるように調整する端末装置が提案されている（例えば、特許文献１を参照。）。可変波長光源は、例えば可変波長レーザダイオードが知られている。この可変波長レーザダイオードを搭載した端末装置を波長分割多重型光伝送システムに接続する場合、作業者は、まず、多重型光伝送システムに端末装置を接続し、上り光信号が局装置に届くように可変波長レーザダイオードの波長を調整することになる。 Wavelength division in which a downstream optical signal obtained by demultiplexing a wavelength multiplexed optical signal from a station apparatus is coupled to a plurality of terminal apparatuses, and an upstream optical signal from the terminal apparatus is combined to couple a wavelength multiplexed optical signal to the station apparatus Multiplexed optical transmission systems, for example, WDM-PON (Wavelength Division Multiplexing-Passive Optical Network) have been proposed. In WDM-PON, the number of terminal devices can be increased as the number of subscribers increases. As a terminal device connected to the WDM-PON, a terminal device that determines the wavelength of the upstream optical signal from information included in the downstream optical signal and adjusts the light of the mounted variable wavelength light source to the wavelength is proposed. (For example, see Patent Document 1). As the variable wavelength light source, for example, a variable wavelength laser diode is known. When connecting a terminal device equipped with this variable wavelength laser diode to a wavelength division multiplexing optical transmission system, an operator first connects the terminal device to the multiplexing optical transmission system so that the upstream optical signal reaches the station device. Therefore, the wavelength of the variable wavelength laser diode is adjusted.

特開２００６−１６６４４６号公報JP 2006-166446 A

しかし、可変波長レーザダイオードは高価であり、これを搭載する端末装置を加入者の増大に応じて波長分割多重型光伝送システムに接続していくことはコストの面で課題がある。 However, the variable wavelength laser diode is expensive, and there is a problem in terms of cost to connect the terminal device on which the variable wavelength laser diode is mounted to the wavelength division multiplexing optical transmission system according to the increase in subscribers.

一方、廉価な固定波長光源を搭載した端末装置を波長分割多重型光伝送システムに接続する場合、次のような課題が想定されている。波長分割多重型光伝送システムの光ファイバに端末装置を接続する作業現場おいては、要求される上り光信号の波長が不明である。このため作業者にとって、いずれの波長の光信号を出力する端末装置を接続するかという選定ができない。 On the other hand, when connecting a terminal device equipped with an inexpensive fixed wavelength light source to a wavelength division multiplexing optical transmission system, the following problems are assumed. In a work site where a terminal device is connected to an optical fiber of a wavelength division multiplexing optical transmission system, the required wavelength of the upstream optical signal is unknown. For this reason, the operator cannot select which terminal device that outputs an optical signal of which wavelength is connected.

そこで、本発明は、固定波長光源を搭載する端末装置を波長分割多重型光伝送システムに接続可能とする光信号判定装置、端末装置接続方法、その端末装置、及びその端末装置の固定波長光源を選択する固定波長光源選択方法を提供することを目的とする。 Therefore, the present invention provides an optical signal determination device, a terminal device connection method, a terminal device thereof, and a fixed wavelength light source of the terminal device that enable a terminal device equipped with a fixed wavelength light source to be connected to a wavelength division multiplexing optical transmission system. An object of the present invention is to provide a method for selecting a fixed wavelength light source to be selected.

上記目的を達成するために、本発明は、光信号判定装置で下り光信号を点検して要求される上り光信号の波長を判定し、その波長の光を出力する端末装置を波長分割多重型光伝送システムに接続することとした。 In order to achieve the above object, the present invention provides a wavelength division multiplexing type terminal device that checks the downstream optical signal by the optical signal determination device, determines the wavelength of the upstream optical signal required, and outputs the light of that wavelength. It was decided to connect to the optical transmission system.

具体的には、本発明に係る光信号判定装置は、局装置からの下り光信号の波長を測定する波長測定器と、下り光信号と前記局装置への上り光信号との波長に関する対応表と、前記波長測定器が測定した下り光信号の波長を前記対応表に照らし合わせ、対応する上り光信号の波長を判定する判定回路と、を備える。 Specifically, the optical signal determination device according to the present invention includes a wavelength measuring device that measures the wavelength of the downstream optical signal from the station device, and a correspondence table regarding the wavelength of the downstream optical signal and the upstream optical signal to the station device. And a determination circuit that compares the wavelength of the downstream optical signal measured by the wavelength measuring device with the correspondence table and determines the wavelength of the corresponding upstream optical signal.

光信号判定装置は、予め定められた下り光信号の波長に対応する上り光信号の波長が記載された対応表を備えている。端末装置を接続しようとする波長分割多重型光伝送システムの光ファイバに光信号判定装置を接続すれば、光信号判定装置はその光ファイバから出力される下り光信号の波長を検出し、対応表に照らし合わせ、その光ファイバに指定された上り光信号の波長を判定することができる。この結果、作業者は、その波長の光を出力する固定波長光源を搭載する端末装置を選択し、波長分割多重型光伝送システムに接続することができる。 The optical signal determination device includes a correspondence table in which wavelengths of upstream optical signals corresponding to predetermined downstream optical signal wavelengths are described. If an optical signal determination device is connected to the optical fiber of the wavelength division multiplexing optical transmission system to which the terminal device is to be connected, the optical signal determination device detects the wavelength of the downstream optical signal output from the optical fiber, and The wavelength of the upstream optical signal designated for the optical fiber can be determined. As a result, the operator can select a terminal device equipped with a fixed wavelength light source that outputs light of that wavelength and connect it to the wavelength division multiplexing optical transmission system.

従って、本発明は、固定波長光源を搭載する端末装置を波長分割多重型光伝送システムに接続可能とする光信号判定装置を提供することができる。 Therefore, the present invention can provide an optical signal determination device that enables a terminal device equipped with a fixed wavelength light source to be connected to a wavelength division multiplexing optical transmission system.

本発明に係る光信号判定装置は、局装置からの下り光信号に含まれる、前記局装置への上り光信号の波長に関する情報を読み取る情報受信回路と、前記情報受信回路が読み取った前記情報に基づいて上り光信号の波長を判定する判定回路と、を備える。 An optical signal determination device according to the present invention includes an information receiving circuit that reads information about a wavelength of an upstream optical signal to the station device, which is included in a downstream optical signal from the station device, and the information read by the information receiving circuit. And a determination circuit that determines the wavelength of the upstream optical signal based on the determination circuit.

局装置が上り光信号の波長に関する情報を下り光信号に含ませて出力している場合、光信号判定装置はその情報を読み取ることができる。端末装置を接続しようとする波長分割多重型光伝送システムの光ファイバに光信号判定装置を接続すれば、光信号判定装置はその光ファイバから出力される下り光信号に含まれる情報を読み出し、その光ファイバに指定された上り光信号の波長を判定することができる。この結果、作業者は、その波長の光を出力する固定波長光源を搭載する端末装置を選択し、波長分割多重型光伝送システムに接続することができる。 When the station device outputs information related to the wavelength of the upstream optical signal in the downstream optical signal, the optical signal determination device can read the information. If an optical signal determination device is connected to the optical fiber of the wavelength division multiplexing optical transmission system to which the terminal device is to be connected, the optical signal determination device reads information contained in the downstream optical signal output from the optical fiber, and The wavelength of the upstream optical signal designated for the optical fiber can be determined. As a result, the operator can select a terminal device equipped with a fixed wavelength light source that outputs light of that wavelength and connect it to the wavelength division multiplexing optical transmission system.

本発明に係る光信号判定装置は、前記判定回路が判定した上り光信号の波長に関する表示をする表示回路をさらに備えることが好ましい。作業者は表示回路に表示された波長に関する情報を容易に確認することができる。 The optical signal determination device according to the present invention preferably further includes a display circuit that displays the wavelength of the upstream optical signal determined by the determination circuit. The operator can easily confirm information on the wavelength displayed on the display circuit.

本発明に係る端末装置接続方法は、局装置からの波長多重光信号を分波した下り光信号を複数の端末装置に結合し、前記端末装置からの上り光信号を合波して波長多重光信号を前記局装置に結合する波長分割多重型光伝送システムにおいて固定波長光源を搭載する端末装置を新たに接続する端末装置接続方法であって、前記光信号判定装置で下り光信号を点検し、対応する上り光信号の波長を判定する点検手順と、前記点検手順で判定された波長の上り光信号を出力する端末装置を前記局装置につながる光ファイバに接続する接続手順と、を備える。 A terminal apparatus connection method according to the present invention combines a downstream optical signal obtained by demultiplexing a wavelength multiplexed optical signal from a station apparatus into a plurality of terminal apparatuses, and combines the upstream optical signal from the terminal apparatus to combine the wavelength multiplexed optical signal. A terminal device connection method for newly connecting a terminal device equipped with a fixed wavelength light source in a wavelength division multiplexing optical transmission system that couples a signal to the station device, wherein the optical signal determination device checks the downstream optical signal, An inspection procedure for determining the wavelength of the corresponding upstream optical signal, and a connection procedure for connecting a terminal device that outputs an upstream optical signal having the wavelength determined in the inspection procedure to an optical fiber connected to the station device.

作業者は、まず、端末装置を接続しようとする波長分割多重型光伝送システムの光ファイバに光信号判定装置を接続する。光信号判定装置はその光ファイバから出力される下り光信号の波長からその光ファイバに指定された上り光信号の波長を判定する。作業者は、信号判定装置の判定結果を見て、判定された波長の光を出力する固定波長光源を搭載する端末装置を選択し、波長分割多重型光伝送システムに接続することができる。 The worker first connects the optical signal determination device to the optical fiber of the wavelength division multiplexing optical transmission system to which the terminal device is to be connected. The optical signal determination device determines the wavelength of the upstream optical signal designated for the optical fiber from the wavelength of the downstream optical signal output from the optical fiber. The operator can see the determination result of the signal determination device, select a terminal device equipped with a fixed wavelength light source that outputs light of the determined wavelength, and connect it to the wavelength division multiplexing optical transmission system.

従って、本発明は、固定波長光源を搭載する端末装置を波長分割多重型光伝送システムに接続可能とする端末装置接続方法を提供することができる。 Therefore, the present invention can provide a terminal device connection method that enables a terminal device equipped with a fixed wavelength light source to be connected to a wavelength division multiplexing optical transmission system.

本発明に係る端末装置接続方法は、局装置からの波長多重光信号を分波した下り光信号を複数の端末装置に結合し、前記端末装置からの上り光信号を合波して波長多重光信号を前記局装置に結合する波長分割多重型光伝送システムにおいて固定波長光源を搭載する端末装置を新たに接続する端末装置接続方法であって、前記光信号判定装置で下り光信号を点検し、対応する上り光信号の波長を判定する点検手順と、新たに接続する端末装置に、前記点検手順で判定された波長の上り光信号を出力する固定波長光源を組み込み、前記固定波長光源を組み込んだ端末装置を前記局装置につながる光ファイバに接続する接続手順と、を備える。 A terminal apparatus connection method according to the present invention combines a downstream optical signal obtained by demultiplexing a wavelength multiplexed optical signal from a station apparatus into a plurality of terminal apparatuses, and combines the upstream optical signal from the terminal apparatus to combine the wavelength multiplexed optical signal. A terminal device connection method for newly connecting a terminal device equipped with a fixed wavelength light source in a wavelength division multiplexing optical transmission system that couples a signal to the station device, wherein the optical signal determination device checks the downstream optical signal, The inspection procedure for determining the wavelength of the corresponding upstream optical signal, and the fixed wavelength light source that outputs the upstream optical signal of the wavelength determined by the inspection procedure is incorporated in the newly connected terminal device, and the fixed wavelength light source is incorporated. A connection procedure for connecting the terminal device to an optical fiber connected to the station device.

局装置が上り光信号の波長に関する情報を下り光信号に含ませて出力している場合、光信号判定装置はその情報を読み取ることができる。作業者は、まず、端末装置を接続しようとする波長分割多重型光伝送システムの光ファイバに光信号判定装置を接続する。光信号判定装置はその光ファイバから出力される下り光信号に含まれる情報を読み出し、その光ファイバに指定された上り光信号の波長を判定する。作業者は、信号判定装置の判定結果を見て、判定された波長の光を出力する固定波長光源を端末装置に組み込む。これにより作業者は、要求される波長の光を出力する端末装置を波長分割多重型光伝送システムの光ファイバに接続することができる。 When the station device outputs information related to the wavelength of the upstream optical signal in the downstream optical signal, the optical signal determination device can read the information. The worker first connects the optical signal determination device to the optical fiber of the wavelength division multiplexing optical transmission system to which the terminal device is to be connected. The optical signal determination device reads information included in the downstream optical signal output from the optical fiber, and determines the wavelength of the upstream optical signal designated for the optical fiber. The operator sees the determination result of the signal determination device and incorporates a fixed wavelength light source that outputs light of the determined wavelength into the terminal device. Thus, the operator can connect the terminal device that outputs light of the required wavelength to the optical fiber of the wavelength division multiplexing optical transmission system.

本発明に係る端末装置は、局装置からの下り光信号を受光する受光回路と、前記光信号判定装置と、前記光信号判定装置が判定した波長の上り光信号を出力する固定波長光源が組み込まれる光源挿入部を有し、前記局装置に向けて前記固定波長光源からの上り光信号を出力できる光出力回路と、を備える。 A terminal device according to the present invention incorporates a light receiving circuit that receives a downstream optical signal from a station device, the optical signal determination device, and a fixed wavelength light source that outputs an upstream optical signal having a wavelength determined by the optical signal determination device. And an optical output circuit capable of outputting an upstream optical signal from the fixed wavelength light source toward the station device.

本端末装置は、光信号判定装置を内蔵し、さらに固定波長光源を入れ変えることができる。本端末装置を波長分割多重型光伝送システムに接続する際には、前記局装置につながる光ファイバに接続する接続手順と、前記光信号判定装置で局装置からの下り光信号を点検し、対応する上り光信号の波長を判定する点検手順と、前記点検手順で判定された波長の上り光信号を前記局装置に向けて出力する固定波長光源を光源挿入部に組み込む組み込み手順と、を行う。このため、作業者は、本端末装置を波長分割多重型光伝送システムの光ファイバに接続し、光信号判定装置が表示する上り光信号の波長に関する情報と一致する固定波長光源を光源挿入部に挿入するだけで、端末装置の波長分割多重型光伝送システムへの接続を完了させることができる。 This terminal device has a built-in optical signal determination device, and can further switch a fixed wavelength light source. When connecting this terminal device to the wavelength division multiplexing optical transmission system, check the connection procedure for connecting to the optical fiber connected to the station device and the optical signal determination device for the downstream optical signal from the station device. An inspection procedure for determining the wavelength of the upstream optical signal to be performed, and an installation procedure for incorporating a fixed wavelength light source that outputs the upstream optical signal having the wavelength determined in the inspection procedure toward the station device, into the light source insertion unit. For this reason, the operator connects the terminal device to the optical fiber of the wavelength division multiplexing optical transmission system, and uses a fixed wavelength light source that matches the wavelength information of the upstream optical signal displayed by the optical signal determination device as the light source insertion unit. The connection of the terminal device to the wavelength division multiplexing optical transmission system can be completed simply by inserting.

従って、本発明は、波長分割多重型光伝送システムに接続可能な端末装置及びその端末装置の固定波長光源を選択する固定波長光源選択方法を提供することができる。 Therefore, the present invention can provide a terminal device connectable to the wavelength division multiplexing optical transmission system and a fixed wavelength light source selection method for selecting a fixed wavelength light source of the terminal device.

本発明は、固定波長光源を搭載する端末装置を波長分割多重型光伝送システムに接続可能とする光信号判定装置、端末装置接続方法、その端末装置、及びその端末装置の固定波長光源を選択する固定波長光源選択方法を提供することができる。 The present invention selects an optical signal determination apparatus, a terminal apparatus connection method, a terminal apparatus thereof, and a fixed wavelength light source of the terminal apparatus that enable a terminal apparatus equipped with a fixed wavelength light source to be connected to a wavelength division multiplexing optical transmission system. A fixed wavelength light source selection method can be provided.

波長分割多重型光伝送システムを説明する構成図である。It is a block diagram explaining a wavelength division multiplexing optical transmission system. 本発明に係る光信号判定装置を説明するブロック図である。It is a block diagram explaining the optical signal determination apparatus which concerns on this invention. 本発明に係る光信号判定装置を説明するブロック図である。It is a block diagram explaining the optical signal determination apparatus which concerns on this invention. 本発明に係る端末装置を説明するブロック図である。It is a block diagram explaining the terminal device which concerns on this invention. 本発明に係る端末装置を説明するブロック図である。It is a block diagram explaining the terminal device which concerns on this invention.

以下、具体的に実施形態を示して本発明を詳細に説明するが、本願の発明は以下の記載に限定して解釈されない。なお、本明細書及び図面において符号が同じ構成要素は、相互に同一のものを示すものとする。 Hereinafter, the present invention will be described in detail with specific embodiments, but the present invention is not construed as being limited to the following description. In the present specification and drawings, the same reference numerals denote the same components.

（第１実施形態）
図１は、本実施形態の光信号判定装置が必要となる波長分割多重型光伝送システムを説明する構成図である。波長分割多重型光伝送システムは、局装置１１と複合型合分波器１２との間を光ファイバ１５で接続し、複合型合分波器１２と端末装置１３−ｎ（ｎは自然数）との間を光ファイバ１６−ｎで接続する。波長分割多重型光伝送システムは、局装置１１からの波長多重光信号Ｓｄ−０を分波した下り光信号Ｓｄ−ｎを複数の端末装置１３−ｎに結合し、端末装置１３−ｎからの上り光信号Ｓｕ−ｎを合波して波長多重光信号Ｓｕ−０を局装置１１に結合する。 (First embodiment)
FIG. 1 is a configuration diagram illustrating a wavelength division multiplexing optical transmission system that requires the optical signal determination apparatus of the present embodiment. In the wavelength division multiplexing optical transmission system, the station device 11 and the composite multiplexer / demultiplexer 12 are connected by an optical fiber 15, and the composite multiplexer / demultiplexer 12 and the terminal device 13-n (n is a natural number) Are connected by an optical fiber 16-n. In the wavelength division multiplexing optical transmission system, the downstream optical signal Sd-n obtained by demultiplexing the wavelength multiplexed optical signal Sd-0 from the station apparatus 11 is coupled to a plurality of terminal apparatuses 13-n, and is transmitted from the terminal apparatus 13-n. The upstream optical signal Su-n is multiplexed and the wavelength multiplexed optical signal Su-0 is coupled to the station apparatus 11.

図１では、局装置１１は１つだけであるが、複合型合分波器を用いて複数個接続されていてもよい。端末装置１３−ｎは固定波長光源を搭載する。複合型合分波器１２は波長多重光信号Ｓｄ−０を下り光信号Ｓｄ−ｎの波長毎に分波する。また、複合型合分波器１２は各端末装置１３−ｎからの上り光信号Ｓｕ−ｎを合波し、波長多重光信号Ｓｕ−０として局装置１１に結合する。複合型合分波器１２は、例えば、アレイ導波路グレーティング（ＡｒｒａｙＷａｖｅｇｕｉｄｅＧｒａｔｉｎｇｓ：ＡＷＧ）である。 In FIG. 1, only one station apparatus 11 is provided, but a plurality of station apparatuses 11 may be connected using a composite multiplexer / demultiplexer. The terminal device 13-n is equipped with a fixed wavelength light source. The composite multiplexer / demultiplexer 12 demultiplexes the wavelength multiplexed optical signal Sd-0 for each wavelength of the downstream optical signal Sd-n. The composite multiplexer / demultiplexer 12 multiplexes the upstream optical signal Su-n from each terminal device 13-n and couples it to the station device 11 as a wavelength multiplexed optical signal Su-0. The composite multiplexer / demultiplexer 12 is, for example, an arrayed waveguide grating (AWG).

図１の波長分割多重型光伝送システムでは、下り光信号Ｓｄ−ｎと上り光信号Ｓｕ−ｎとが衝突しないように、また、下り光信号Ｓｄ−ｎ同士、上り光信号Ｓｕ−ｎ同士が衝突しないように光ファイバ１６−ｎ毎に下り光信号Ｓｄ−ｎと上り光信号Ｓｕ−ｎの波長が定められている。 In the wavelength division multiplexing optical transmission system of FIG. 1, the downstream optical signal Sd-n and the upstream optical signal Su-n do not collide with each other, and the downstream optical signals Sd-n and upstream optical signals Su-n are The wavelengths of the downstream optical signal Sd-n and upstream optical signal Su-n are determined for each optical fiber 16-n so as not to collide.

図１の光ファイバ１６−ｘ（１≦ｘ≦ｎ）には、まだ端末装置が接続されていない。ここに、新たに端末装置を接続する場合で説明する。この光ファイバ１６−ｘに定められている波長の上り光信号を出力する端末装置を接続しなければならない。このため、作業者は、まず光ファイバ１６−ｘが要求する上り光信号の波長を知ることから始める。 A terminal device is not yet connected to the optical fiber 16-x (1 ≦ x ≦ n) in FIG. Here, a case where a terminal device is newly connected will be described. A terminal device that outputs an upstream optical signal having a wavelength defined in the optical fiber 16-x must be connected. For this reason, the worker starts by knowing the wavelength of the upstream optical signal required by the optical fiber 16-x.

そこで、作業者は端末装置を接続する前に光信号判定装置を接続し、定められた上り光信号の波長を調べる端末装置接続方法を行う。この端末装置接続方法は、光信号判定装置で下り光信号Ｓｄ−ｘを点検し、対応する上り光信号Ｓｕ−ｘの波長を判定する点検手順と、前記点検手順で判定された波長の上り光信号Ｓｕ−ｘを出力する端末装置を光ファイバ１６−ｘに接続する接続手順と、を備える。 Therefore, the operator connects the optical signal determination device before connecting the terminal device, and performs a terminal device connection method for checking the wavelength of the determined upstream optical signal. In this terminal device connection method, an optical signal determination device inspects the downstream optical signal Sd-x, determines the wavelength of the corresponding upstream optical signal Su-x, and upstream light having the wavelength determined by the inspection procedure. A connection procedure for connecting a terminal device that outputs the signal Su-x to the optical fiber 16-x.

図２は、ここで使用される光信号判定装置２０を説明するブロック図である。光信号判定装置２０は、局装置１１からの下り光信号Ｓｄ−ｘの波長を測定する波長測定器２１と、下り光信号Ｓｄ−ｎと前記局装置への上り光信号Ｓｕ−ｎとの波長に関する対応表２４と、波長測定器２１が測定した下り光信号Ｓｄ−ｘの波長を対応表２４に照らし合わせ、対応する上り光信Ｓｕ−ｘの波長を判定する判定回路２２と、を備える。また、光信号判定装置２０は、判定回路２２が判定した上り光信号Ｓｕ−ｘの波長に関する表示をする表示回路２６をさらに備える。 FIG. 2 is a block diagram illustrating the optical signal determination device 20 used here. The optical signal determination device 20 includes a wavelength measuring device 21 that measures the wavelength of the downstream optical signal Sd-x from the station device 11, and the wavelengths of the downstream optical signal Sd-n and the upstream optical signal Su-n to the station device. And a determination circuit 22 that compares the wavelength of the downstream optical signal Sd-x measured by the wavelength measuring device 21 with the correspondence table 24 and determines the wavelength of the corresponding upstream optical signal Su-x. The optical signal determination device 20 further includes a display circuit 26 that displays the wavelength of the upstream optical signal Su-x determined by the determination circuit 22.

対応表２４は図１の波長分割多重型光伝送システムで予め定められている下り光信号Ｓｄ−ｎの波長と上り光信号Ｓｕ−ｎとの対応表である。対応表２４には波長に対応した記号番号が記載されていてもよい。 The correspondence table 24 is a correspondence table between the wavelength of the downstream optical signal Sd-n and the upstream optical signal Su-n determined in advance in the wavelength division multiplexing optical transmission system of FIG. In the correspondence table 24, a symbol number corresponding to the wavelength may be described.

判定回路２２は、波長測定器２１が測定した下り光信号Ｓｄ−ｘの波長を対応表２４に問い合わせる。対応表２４に記号番号が記載される場合は、判定回路２２は、下り光信号Ｓｄ−ｘの波長に対応する記号番号を対応表２４に問い合わせる。そして、判定回路２２は、対応表２４から下り光信号Ｓｄ−ｘに対応する上り光信号Ｓｕ−ｘの波長を通知されると、その波長を表示回路２６に数値で表示させる。対応表２４からの通知が記号番号の場合、判定回路２２は、その記号番号を表示回路２６に表示させる。あるいは、判定回路２２が複数のランプを有しており、上り光信号Ｓｕ−ｘの波長を示すランプを点灯させてもよい。 The determination circuit 22 inquires the correspondence table 24 about the wavelength of the downstream optical signal Sd-x measured by the wavelength measuring device 21. When the symbol number is described in the correspondence table 24, the determination circuit 22 inquires the correspondence table 24 about the symbol number corresponding to the wavelength of the downstream optical signal Sd-x. When the determination circuit 22 is notified of the wavelength of the upstream optical signal Su-x corresponding to the downstream optical signal Sd-x from the correspondence table 24, the determination circuit 22 displays the wavelength on the display circuit 26 as a numerical value. When the notification from the correspondence table 24 is a symbol number, the determination circuit 22 causes the display circuit 26 to display the symbol number. Alternatively, the determination circuit 22 may include a plurality of lamps, and a lamp indicating the wavelength of the upstream optical signal Su-x may be turned on.

作業者は、点検手順で光信号判定装置２０を光ファイバ１６−ｘに接続し、上り光信号の波長を調べる。そして作業者は、接続手順で表示回路２６に表示された波長、記号番号又は点灯したランプを見て、正しい端末装置、すなわち上り光信号Ｓｕ−ｘを出力する端末装置１３−ｘを光ファイバ１６−ｘに接続できる。 The operator connects the optical signal determination device 20 to the optical fiber 16-x by an inspection procedure, and checks the wavelength of the upstream optical signal. Then, the operator looks at the wavelength, the symbol number, or the lit lamp displayed on the display circuit 26 in the connection procedure, and connects the correct terminal device, that is, the terminal device 13-x that outputs the upstream optical signal Su-x to the optical fiber 16. -X can be connected.

端末装置１３−ｘは固定波長光源を入れ換え可能な構造であってもよい。作業者は光信号判定装置２０で定められた上り光信号の波長を調べた後、これから接続しようとする端末装置１３−ｘに指定された波長の固定波長光源を組み込み、端末装置１３−ｘを光ファイバ１６−ｘに接続する端末装置接続方法を行う。この端末装置接続方法は、光信号判定装置２０で下り光信号Ｓｄ−ｘを点検し、対応する上り光信号Ｓｕ−ｘの波長を判定する点検手順と、新たに接続する端末装置１３−ｘに、前記点検手順で判定された波長の上り光信号Ｓｕ−ｘを出力する固定波長光源を組み込み、固定波長光源を組み込んだ端末装置１３−ｘを光ファイバ１６−ｘに接続する接続手順と、を備える。 The terminal device 13-x may have a structure in which a fixed wavelength light source can be replaced. After checking the wavelength of the upstream optical signal determined by the optical signal determination device 20, the worker incorporates a fixed wavelength light source having the designated wavelength into the terminal device 13-x to be connected, and installs the terminal device 13-x. A terminal device connection method for connecting to the optical fiber 16-x is performed. In this terminal device connection method, the optical signal determination device 20 checks the downstream optical signal Sd-x, determines the wavelength of the corresponding upstream optical signal Su-x, and the newly connected terminal device 13-x. A connection procedure for incorporating a fixed wavelength light source that outputs the upstream optical signal Su-x having the wavelength determined in the inspection procedure, and connecting the terminal device 13-x incorporating the fixed wavelength light source to the optical fiber 16-x. Prepare.

固定波長光源を入れ換え可能な端末装置の場合、作業者は複数の端末装置を接続現場へ持っていく必要が無くなる。作業者は１つの端末装置と複数の小さな固定波長光源を作業現場にもって行き、作業現場で光信号判定装置が表示する波長の固定波長光源を端末装置に組み込めばよいので作業効率が向上する。 In the case of a terminal device in which the fixed wavelength light source can be replaced, the operator does not have to take a plurality of terminal devices to the connection site. The operator can take one terminal device and a plurality of small fixed wavelength light sources to the work site, and the fixed wavelength light source having the wavelength displayed by the optical signal determination device can be incorporated into the terminal device at the work site, so that work efficiency is improved.

この場合、端末装置１３−ｘが光信号判定装置２０を含んでいてもよい。図４は、端末装置１３−ｘを説明するブロック図である。この端末装置１３−ｘは、局装置１１からの下り光信号を受光する受光回路４２と、光信号判定装置２０と、光信号判定装置２０が判定した波長の上り光信号を出力する固定波長光源が組み込まれる光源挿入部４６を有し、局装置１１に上り光信号Ｓｕ−ｎを出力する光出力回路４３と、を備える。 In this case, the terminal device 13-x may include the optical signal determination device 20. FIG. 4 is a block diagram illustrating the terminal device 13-x. The terminal device 13-x includes a light receiving circuit 42 that receives a downstream optical signal from the station device 11, an optical signal determination device 20, and a fixed wavelength light source that outputs an upstream optical signal having a wavelength determined by the optical signal determination device 20. And an optical output circuit 43 that outputs an upstream optical signal Su-n to the station apparatus 11.

端末装置１３−ｘが光信号判定装置２０を含んでいる場合、作業者は、端末装置１３−ｘを光ファイバ１６−ｘに接続する接続手順と、光信号判定装置２０で下り光信号Ｓｄ−ｘを点検し、対応する上り光信号Ｓｕ−ｘの波長を判定する点検手順と、点検手順で判定された波長の上り光信号Ｓｕ−ｘを局装置１１に向けて出力する固定波長光源を光源挿入部４６に組み込む組み込み手順と、を備える固定波長光源選択方法を行う。 When the terminal device 13-x includes the optical signal determination device 20, the operator connects the terminal device 13-x to the optical fiber 16-x, and the optical signal determination device 20 uses the downstream optical signal Sd-. an inspection procedure for inspecting x and determining the wavelength of the corresponding upstream optical signal Su-x, and a fixed wavelength light source that outputs the upstream optical signal Su-x having the wavelength determined in the inspection procedure toward the station apparatus 11 as a light source A fixed wavelength light source selection method including an assembling procedure to be incorporated into the insertion unit 46.

作業者は、端末装置１３−ｘを光ファイバ１６−ｘに接続し、端末装置１３−ｘの表示回路２６に表示された波長、記号番号又は点灯したランプに対応する固定波長光源を光源挿入部４６に挿入することで接続作業を完了できる。 The operator connects the terminal device 13-x to the optical fiber 16-x, and uses a light source insertion unit for a fixed wavelength light source corresponding to the wavelength, symbol number, or lit lamp displayed on the display circuit 26 of the terminal device 13-x. The connection work can be completed by inserting it into 46.

ここで、固定波長光源が波長や記号番号に対応した立体形状の識別部を持っており、光源挿入部４６が固定波長光源の識別部と嵌合する嵌合部を持っていてもよい。この嵌合部は下り光信号の波長に応じて形状を変化させる。作業者が間違った波長の固定波長光源を光源挿入部４６に挿入しようとしても嵌合部と識別部とが一致しないため固定波長光源を光源挿入部４６に挿入できない。固定波長光源がこのような識別部を持ち、光源挿入部４６がこのような嵌合部を持つことで作業者の作業ミスを防ぐことができる。 Here, the fixed wavelength light source may have a three-dimensional shape identification unit corresponding to the wavelength or symbol number, and the light source insertion unit 46 may have a fitting unit that fits with the identification unit of the fixed wavelength light source. The fitting portion changes its shape according to the wavelength of the downstream optical signal. Even if an operator tries to insert a fixed wavelength light source having an incorrect wavelength into the light source insertion portion 46, the fixed wavelength light source cannot be inserted into the light source insertion portion 46 because the fitting portion and the identification portion do not match. The fixed wavelength light source has such an identification part, and the light source insertion part 46 has such a fitting part, so that it is possible to prevent an operator from making a mistake.

（第２実施形態）
第２実施形態の波長分割多重型光伝送システムの構成は図１の波長分割多重型光伝送システムと同じであるが、局装置１１は各下り光信号Ｓｄ−ｎに上り光信号Ｓｕ−ｎの波長の情報を含ませている点が異なる。例えば、局装置１１は、フレームの一部に上り光信号Ｓｕ−ｎの波長の情報を載せて下り光信号Ｓｄ−ｎを出力する。波長に関する情報は、波長そのものでもよいし、波長に対応した記号番号でもよい。 (Second Embodiment)
The configuration of the wavelength division multiplexing optical transmission system of the second embodiment is the same as that of the wavelength division multiplexing optical transmission system of FIG. 1, but the station apparatus 11 transmits the upstream optical signal Su-n to each downstream optical signal Sd-n. The difference is that wavelength information is included. For example, the station apparatus 11 outputs the downstream optical signal Sd-n by placing information on the wavelength of the upstream optical signal Su-n on a part of the frame. The information regarding the wavelength may be the wavelength itself or a symbol number corresponding to the wavelength.

この場合、作業者は、図２で説明した光信号判定装置２０と異なる光信号判定装置３０を使用して第１実施形態で説明した端末装置接続方法を行う。図３は、ここで使用される光信号判定装置３０を説明するブロック図である。作業者が光ファイバ１６−ｘに新たに端末装置を接続する場合で説明する。光信号判定装置３０は、局装置１１からの下り光信号Ｓｄ−ｘに含まれる、局装置１１への上り光信号Ｓｕ−ｘの波長に関する情報を読み取る情報受信回路３１と、情報受信回路３１が読み取った情報に基づいて上り光信号Ｓｕ−ｘの波長を判定する判定回路３２と、を備える。光信号判定装置３０は、表示回路２６を備えていてもよい。 In this case, the worker uses the optical signal determination device 30 different from the optical signal determination device 20 described in FIG. 2 to perform the terminal device connection method described in the first embodiment. FIG. 3 is a block diagram illustrating the optical signal determination device 30 used here. A case will be described where the worker newly connects a terminal device to the optical fiber 16-x. The optical signal determination device 30 includes an information receiving circuit 31 that reads information on the wavelength of the upstream optical signal Su-x to the station device 11 included in the downstream optical signal Sd-x from the station device 11, and the information receiving circuit 31 includes And a determination circuit 32 that determines the wavelength of the upstream optical signal Su-x based on the read information. The optical signal determination device 30 may include a display circuit 26.

情報受信回路３１は、下り光信号Ｓｄ−ｎを受信し、その中に含まれる波長に関する情報を読み出し、判定回路３２へ出力する。判定回路３２は波長に関する情報から上り光信号Ｓｕ−ｎの波長を判定し、表示回路２６へその波長を表示するように出力する。表示回路２６は数値を表示してもよいし、波長に対応した記号番号を表示してもよい。また、表示回路２６は波長に対応したランプを点灯してもよい。 The information receiving circuit 31 receives the downstream optical signal Sd-n, reads information regarding the wavelength included therein, and outputs the information to the determination circuit 32. The determination circuit 32 determines the wavelength of the upstream optical signal Su-n from the information regarding the wavelength, and outputs the wavelength to the display circuit 26 so as to display it. The display circuit 26 may display a numerical value or a symbol number corresponding to the wavelength. The display circuit 26 may turn on a lamp corresponding to the wavelength.

作業者は、この表示回路２６に表示された波長又は記号番号を見て、正しい端末装置、すなわち上り光信号Ｓｕ−ｘを出力する端末装置１３−ｘを接続できる。 The operator can connect the correct terminal device, that is, the terminal device 13-x that outputs the upstream optical signal Su-x, by looking at the wavelength or symbol number displayed on the display circuit 26.

また、第１実施形態で説明したように、端末装置１３−ｘが固定波長光源を入れ換え可能な構造であってもよい。この場合、端末装置１３−ｘが光信号判定装置３０を含んでいてもよい。図５は、端末装置１３−ｘを説明するブロック図である。局装置１１からの下り光信号を受光する受光回路４２と、光信号判定装置３０と、光信号判定装置３０が判定した波長の上り光信号を出力する固定波長光源が組み込まれる光源挿入部４６を有し、局装置１１に上り光信号Ｓｕ−ｎを出力する光出力回路４３と、を備える。 Further, as described in the first embodiment, the terminal device 13-x may have a structure in which a fixed wavelength light source can be replaced. In this case, the terminal device 13-x may include the optical signal determination device 30. FIG. 5 is a block diagram illustrating the terminal device 13-x. The light receiving circuit 42 that receives the downstream optical signal from the station device 11, the optical signal determination device 30, and the light source insertion unit 46 in which the fixed wavelength light source that outputs the upstream optical signal having the wavelength determined by the optical signal determination device 30 is incorporated. And an optical output circuit 43 that outputs the upstream optical signal Su-n to the station apparatus 11.

端末装置１３−ｘが光信号判定装置３０を含んでいる場合、作業者は、端末装置１３−ｘを光ファイバ１６−ｘに接続する接続手順と、光信号判定装置３０で下り光信号Ｓｄ−ｘを点検し、対応する上り光信号Ｓｕ−ｘの波長を判定する点検手順と、点検手順で判定された波長の上り光信号Ｓｕ−ｘを局装置１１に向けて出力する固定波長光源を光源挿入部４６に組み込む組み込み手順と、を備える固定波長光源選択方法を行う。 When the terminal device 13-x includes the optical signal determination device 30, the worker connects the terminal device 13-x to the optical fiber 16-x, and the optical signal determination device 30 uses the downstream optical signal Sd−. an inspection procedure for inspecting x and determining the wavelength of the corresponding upstream optical signal Su-x, and a fixed wavelength light source that outputs the upstream optical signal Su-x having the wavelength determined in the inspection procedure toward the station apparatus 11 as a light source A fixed wavelength light source selection method including an assembling procedure to be incorporated into the insertion unit 46.

また、図４で説明したように、固定波長光源が波長や記号番号に対応した立体形状の識別部を持っており、光源挿入部４６が下り光信号の波長に応じて形状を変化させる嵌合部を持っていてもよい。作業者の作業ミスを防ぐことができる。 In addition, as described with reference to FIG. 4, the fixed wavelength light source has a three-dimensional shape identification unit corresponding to the wavelength and symbol number, and the light source insertion unit 46 is adapted to change the shape according to the wavelength of the downstream optical signal. You may have a department. An operator's work mistake can be prevented.

以上、実施形態１と実施形態２を説明したが、本端末装置接続方法及び固定波長光源選択方法の点検手順には、波長分割多重型光伝送システムのタイプによって２つの方法がある。 As described above, Embodiment 1 and Embodiment 2 have been described. There are two methods for checking the terminal device connection method and the fixed wavelength light source selection method depending on the type of the wavelength division multiplexing optical transmission system.

すなわち、波長分割多重型光伝送システムが上り光信号の波長についての情報を下り光信号に含めていないタイプの場合、点検手順は、作業者が光信号判定装置２０を光ファイバ１６−ｘに接続した後、光信号判定装置２０の波長測定器２１が局装置１１からの下り光信号Ｓｄ−ｘの波長を測定し、判定回路２２が下り光信号Ｓｄ−ｘの波長を対応表２４に照らし合わせ、対応する上り光信号Ｓｕ−ｘの波長を判定する、という手順になる。 That is, when the wavelength division multiplexing optical transmission system is a type in which information about the wavelength of the upstream optical signal is not included in the downstream optical signal, the inspection procedure is that the operator connects the optical signal determination device 20 to the optical fiber 16-x. After that, the wavelength measuring device 21 of the optical signal determination device 20 measures the wavelength of the downstream optical signal Sd-x from the station device 11, and the determination circuit 22 compares the wavelength of the downstream optical signal Sd-x with the correspondence table 24. The procedure is to determine the wavelength of the corresponding upstream optical signal Su-x.

一方、波長分割多重型光伝送システムが上り光信号の波長についての情報を下り光信号に含めているタイプの場合、点検手順は、作業者が光信号判定装置３０を光ファイバ１６−ｘに接続した後、光信号判定装置３０の情報受信回路３１が下り光信号Ｓｄ−ｘに含まれる上り光信号Ｓｕ−ｘの波長に関する情報を読み取り、判定回路３２が前記情報に基づいて上り光信号Ｓｕ−ｘの波長を判定する、という手順になる。 On the other hand, when the wavelength division multiplexing optical transmission system is a type in which the information about the wavelength of the upstream optical signal is included in the downstream optical signal, the inspection procedure is that the operator connects the optical signal determination device 30 to the optical fiber 16-x. After that, the information reception circuit 31 of the optical signal determination device 30 reads information on the wavelength of the upstream optical signal Su-x included in the downstream optical signal Sd-x, and the determination circuit 32 determines the upstream optical signal Su− based on the information. The procedure is to determine the wavelength of x.

１１：局装置
１２：複合型合分波器
１３−１、１３−２、・・・、１３−ｘ、・・・、１３−ｎ：端末装置
１５：光ファイバ
１６−１、１６−２、・・・、１６−ｘ、・・・、１６−ｎ：光ファイバ
Ｓｄ−０：波長多重光信号
Ｓｕ−０：波長多重光信号
Ｓｄ−１、Ｓｄ−２、・・・、Ｓｄ−ｘ、・・・、Ｓｄ−ｎ：下り光信号
Ｓｕ−１、Ｓｕ−２、・・・、Ｓｕ−ｘ、・・・、Ｓｕ−ｎ：上り光信号
２０：光信号判定装置
２１：波長測定器
２２：判定回路
２４：対応表
２６：表示回路
３０：光信号判定装置
３１：情報受信回路
３２：判定回路
４１：フィルタ
４２：受光回路
４３：光出力回路
４６：光源挿入部 11: Station device 12: Composite multiplexer / demultiplexers 13-1, 13-2, ..., 13-x, ..., 13-n: Terminal device 15: Optical fibers 16-1, 16-2, ..., 16-x, ..., 16-n: Optical fiber Sd-0: Wavelength multiplexed optical signal Su-0: Wavelength multiplexed optical signal Sd-1, Sd-2, ..., Sd-x, ..., Sd-n: Downstream optical signals Su-1, Su-2, ..., Su-x, ..., Su-n: Upstream optical signal 20: Optical signal determination device 21: Wavelength measuring device 22 : Determination circuit 24: correspondence table 26: display circuit 30: optical signal determination device 31: information reception circuit 32: determination circuit 41: filter 42: light receiving circuit 43: light output circuit 46: light source insertion unit

Claims

A downstream optical signal obtained by demultiplexing a wavelength multiplexed optical signal transmitted from a station apparatus by one first optical fiber is coupled to a plurality of second optical fibers for each wavelength, and upstream light from the plurality of second optical fibers In a wavelength division multiplexing optical transmission system in which a wavelength division multiplexed optical signal combined with a signal is coupled to the station device by the first optical fiber, a terminal device having one fixed wavelength light source mounted at the end of the second optical fiber is provided. A terminal device connection method for newly connecting,
A determination device connection procedure for connecting an optical signal determination device to the end of the second optical fiber;
Determining a wavelength of the upstream optical signal, wherein the downstream optical signal of an unknown wavelength output from the end of the second optical fiber inspected by the optical signal determination device, corresponding against the wavelength of KNOWN said downlink optical signal to a corresponding table Or an inspection procedure for determining the wavelength of the upstream optical signal based on the wavelength information of the upstream optical signal included in the downstream optical signal ;
A connection procedure for connecting a terminal device equipped with a fixed wavelength light source that outputs an upstream optical signal having a wavelength determined in the inspection procedure to the second optical fiber,
A terminal device connection method comprising:

A downstream optical signal obtained by demultiplexing a wavelength multiplexed optical signal transmitted from a station apparatus by one first optical fiber is coupled to a plurality of second optical fibers for each wavelength, and upstream light from the plurality of second optical fibers In a wavelength division multiplexing optical transmission system in which a wavelength division multiplexed optical signal combined with a signal is coupled to the station apparatus by the first optical fiber, a terminal apparatus capable of mounting one fixed wavelength light source at the end of the second optical fiber A terminal device connection method for newly connecting
A determination device connection procedure for connecting an optical signal determination device to the end of the second optical fiber;
Determining a wavelength of the upstream optical signal, wherein the downstream optical signal of an unknown wavelength output from the end of the second optical fiber inspected by the optical signal determination device, corresponding against the wavelength of KNOWN said downlink optical signal to a corresponding table Or an inspection procedure for determining the wavelength of the upstream optical signal based on the wavelength information of the upstream optical signal included in the downstream optical signal ;
A connection procedure for connecting a terminal device incorporating the fixed wavelength light source to the second optical fiber, incorporating a fixed wavelength light source that outputs an upstream optical signal having a wavelength determined by the inspection procedure into a newly connected terminal device; ,
A terminal device connection method comprising:

A downstream optical signal obtained by demultiplexing a wavelength multiplexed optical signal transmitted from a station apparatus by one first optical fiber is coupled to a plurality of second optical fibers for each wavelength, and upstream light from the plurality of second optical fibers In a wavelength division multiplexing optical transmission system in which a wavelength division multiplexed optical signal combined with a signal is coupled to the station device by the first optical fiber, a terminal device connected to the end of the second optical fiber,
A light receiving circuit for receiving a downstream optical signal coupled to the second optical fiber;
The downstream optical signal having an unknown wavelength output from the end of the second optical fiber is inspected, and the wavelength of the downstream optical signal thus determined is checked against a correspondence table to determine the wavelength of the corresponding upstream optical signal, or the downstream light An optical signal determination device for determining the wavelength of the upstream optical signal based on the wavelength information of the upstream optical signal included in the signal ;
Light that has a light source insertion part into which one fixed wavelength light source that outputs an upstream optical signal having a wavelength determined by the optical signal determination device is incorporated, and that can output an upstream optical signal from the fixed wavelength light source toward the station device An output circuit;
A terminal device comprising:

A downstream optical signal obtained by demultiplexing a wavelength multiplexed optical signal transmitted from a station apparatus by one first optical fiber is coupled to a plurality of second optical fibers for each wavelength, and upstream light from the plurality of second optical fibers In a wavelength division multiplexing optical transmission system in which a wavelength division multiplexed optical signal combined with a signal is coupled to the station device by the first optical fiber, a fixed wavelength light source is connected to a terminal device newly connected to the end of the second optical fiber. A fixed wavelength light source mounting method for mounting,
A connection procedure for connecting the terminal device according to claim 3 to the second optical fiber;
Inspecting the downstream optical signal coupled to the second optical fiber with the optical signal determination device, and determining the wavelength of the corresponding upstream optical signal,
An assembling procedure for incorporating one fixed wavelength light source that outputs an upstream optical signal having a wavelength determined in the inspection procedure toward the station device, into a light source insertion unit;
A fixed wavelength light source selection method comprising: