JP2518021B2 - WDM module with monitoring function - Google Patents
WDM module with monitoring functionInfo
- Publication number
- JP2518021B2 JP2518021B2 JP63202639A JP20263988A JP2518021B2 JP 2518021 B2 JP2518021 B2 JP 2518021B2 JP 63202639 A JP63202639 A JP 63202639A JP 20263988 A JP20263988 A JP 20263988A JP 2518021 B2 JP2518021 B2 JP 2518021B2
- Authority
- JP
- Japan
- Prior art keywords
- optical
- wavelength
- demultiplexer
- signal
- receiver
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/29—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the position or the direction of light beams, i.e. deflection
- G02F1/31—Digital deflection, i.e. optical switching
- G02F1/313—Digital deflection, i.e. optical switching in an optical waveguide structure
- G02F1/3132—Digital deflection, i.e. optical switching in an optical waveguide structure of directional coupler type
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- Physics & Mathematics (AREA)
- Nonlinear Science (AREA)
- General Physics & Mathematics (AREA)
- Optics & Photonics (AREA)
- Optical Communication System (AREA)
- Optical Integrated Circuits (AREA)
Description
【発明の詳細な説明】 ［産業上の利用分野］ 本発明は、双方向波長多重伝送システムにおいて、自
局から送出される光信号および他局から送られてきた光
信号を切換え動作により監視できる機能を付加した監視
機能付波長多重伝送モジュールに関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial field of application] The present invention can monitor an optical signal transmitted from its own station and an optical signal transmitted from another station by a switching operation in a bidirectional wavelength division multiplexing transmission system. The present invention relates to a wavelength division multiplexing transmission module with a monitoring function, which has additional functions.
［従来の技術］ 一本の光ファイバ内に波長の異なる複数の光信号（λ
1、λ2、……、λn）を双方向に伝送させる双方向波長
多重伝送は、システムの拡張性、経済性、柔軟性等の点
で期待されている。[Prior Art] A plurality of optical signals with different wavelengths (λ
Bidirectional wavelength division multiplex transmission for bidirectional transmission of 1 , λ 2 , ..., λ n ) is expected in terms of system expandability, economy, flexibility, and the like.
第３図は従来の双方向波長多重伝送システムの構成例
を示したものである。FIG. 3 shows a configuration example of a conventional bidirectional wavelength division multiplexing transmission system.
双方向波長多重伝送システムは、同図に示すように、
局８と局９間、例えば自局と他局間を一本の光ファイバ
４で接続し、一本の光ファイバ４内に異なった波長
λ1、λ2の光信号を双方向に伝送させるようにしたもの
である。即ち、局８側からは光送信部１より波長λ1の
光信号を光合分波部３、光ファイバ４を介して局９側に
送出し、光合分波部７により分波して波長λ1の光信号
を光受信部６で受信する。逆に、局９側からは光送信部
５より波長λ2の光信号を光合分波部７、光ファイバ４
を介して局８側に送出し、光合分波部３により分波して
光受信部２で受信するシステムである。The bidirectional wavelength division multiplex transmission system, as shown in the figure,
A single optical fiber 4 connects between the stations 8 and 9, for example, between the local station and another station, and optical signals of different wavelengths λ 1 and λ 2 are bidirectionally transmitted in the single optical fiber 4. It was done like this. That is, from the station 8 side, an optical signal of wavelength λ 1 is sent from the optical transmitter 1 to the station 9 side via the optical multiplexer / demultiplexer 3 and the optical fiber 4, and is demultiplexed by the optical multiplexer / demultiplexer 7 to have a wavelength λ 1. The optical signal of 1 is received by the optical receiver 6. On the contrary, from the station 9 side, the optical signal of wavelength λ 2 is transmitted from the optical transmitter 5 to the optical multiplexer / demultiplexer 7 and the optical fiber 4.
In this system, the signal is sent to the station 8 side via the optical multiplexer / demultiplexer, demultiplexed by the optical multiplexer / demultiplexer 3, and received by the optical receiver 2.
［発明が解決しようとする課題］ ところが、第３図の構成において、通信の障害が生じ
て、通信不能になる場合を考えてみると次のような場合
がある。[Problems to be Solved by the Invention] However, in the configuration of FIG. 3, considering the case where communication failure occurs and communication becomes impossible, the following cases may occur.
（１）光ファイバ４の切断、劣化による通信不能 （２）自局（例えば局８）内の光送信部１、光受信部２
の故障による通信不能 （３）他局（例えば局９）内の光送信部５、光受信部６
の故障による通信不能 （４）光送信部１、５の中心波長変動による通信不能 これらの通信不能が生じると、第３図の構成では、障
害監視機能がないので、素早く対処することができず、
セキュリティの確保という面で問題があった。(1) Communication is impossible due to disconnection and deterioration of the optical fiber 4 (2) Optical transmitter 1 and optical receiver 2 in the own station (for example, station 8)
(3) Optical transmitter 5 and optical receiver 6 in another station (eg station 9)
(4) Communication failure due to fluctuations in the central wavelength of the optical transmitters 1 and 5 When these communication failures occur, the configuration in FIG. 3 does not have a failure monitoring function, so quick response cannot be taken. ,
There was a problem in terms of ensuring security.
本発明の目的は、通信不能の原因がどこにあるかをそ
れぞれの局で監視できる機能を付加した監視機能付波長
多重伝送モジュールを提供することである。An object of the present invention is to provide a wavelength division multiplexing transmission module with a monitoring function, which is added with a function of allowing each station to monitor where the cause of communication failure is.
［課題を解決するための手段］ 本発明の要旨は、波長λ1の光信号を送信する光送信
部および波長λ2の光信号を受信する光受信部を有し、
それらが光合分波部を介して１本の光ファイバの一方端
と接続されてなる双方向光通信を行うための波長多重伝
送モジュールにおいて、２つの単一モード導波路を近接
させて形成した光結合領域にプレーナ電極を配置してな
る光スイッチを上記光合分波部と上記光ファイバとの間
に設けて、この光スイッチを構成する一方の上記単一モ
ード導波路の両端のそれぞれに上記光合分波部および上
記光ファイバを接続し、残りの上記単一モード導波路の
両端のそれぞれに監視用光受信器を接続し、上記光スイ
ッチの上記プレーナ電極への印加電圧を制御することに
より、自局の上記光送信部からの波長λ1の光信号およ
び上記光ファイバを伝送してきた他局からの波長λ2の
光信号を上記監視用光受信器側へ切り替えて各波長の光
信号をそれぞれ所定の監視用光受信器で受信し、各波長
の光信号をそれぞれ独立に監視することにある。[Means for Solving the Problem] The gist of the present invention is to have an optical transmitter for transmitting an optical signal of wavelength λ 1 and an optical receiver for receiving an optical signal of wavelength λ 2 ,
In a wavelength division multiplexing transmission module for performing two-way optical communication in which they are connected to one end of one optical fiber via an optical multiplexing / demultiplexing unit, an optical system in which two single mode waveguides are formed close to each other. An optical switch having a planar electrode arranged in the coupling region is provided between the optical multiplexer / demultiplexer and the optical fiber, and the optical multiplexer is provided at both ends of one of the single mode waveguides constituting the optical switch. By connecting the demultiplexing unit and the optical fiber, and connecting the monitoring optical receiver to each of both ends of the remaining single mode waveguide, by controlling the voltage applied to the planar electrode of the optical switch, The optical signal of the wavelength λ 1 from the optical transmitter of the own station and the optical signal of the wavelength λ 2 from the other station that has transmitted the optical fiber are switched to the optical receiver side for monitoring, and the optical signal of each wavelength is switched. Predetermined Receiving the monitoring optical receiver, it is to monitor independently the optical signal of each wavelength.
さらに、上記光受信器に受信する上記光信号を分波す
るため上記光スイッチと上記光受信器との間にチューナ
ブル光分波器を設けたものである。Further, a tunable optical demultiplexer is provided between the optical switch and the optical receiver in order to demultiplex the optical signal received by the optical receiver.
［作用］ 波長多重伝送システムが正常に作動されている場合、
上記構成により、自局の光送信部より光合分波部を経て
伝搬されてきた光信号、または光ファイバを介して他局
より送られてきた光信号は、光スイッチの駆動電圧を制
御することにより、光受信器に受信される。ところが、
波長多重伝送システムが何等かの原因により通信不能な
状態となった場合、上記光信号は、上記光受信器へ伝搬
されないので、光スイッチの駆動電圧をどの様に制御し
たとしても、上記光受信器に受信されない。従って、上
記光信号が上記光受信器により受信可能か否かにより、
波長多重伝送システムの通信不能か否かの監視を行うこ
とができる。[Operation] When the WDM system is operating normally,
With the above configuration, the optical signal propagated from the optical transmitter of the own station via the optical multiplexer / demultiplexer, or the optical signal sent from another station via the optical fiber controls the drive voltage of the optical switch. Is received by the optical receiver. However,
When the WDM transmission system becomes incommunicable due to some reason, the optical signal is not propagated to the optical receiver, so no matter how the drive voltage of the optical switch is controlled, the optical reception Not received. Therefore, depending on whether the optical signal can be received by the optical receiver,
It is possible to monitor whether the WDM transmission system cannot communicate.
また、波長多重伝送システムが正常に作動されている
場合、異なった波長の複数の光信号はチューナブル光分
波器で分離されて、上記光受信器にそれぞれ独立に全て
受信される。ところが、波長多重伝送システムに故障を
きたした場合、ある波長の光信号のみは、チューナブル
光分波器および上記光受信器へ伝搬されず、チューナブ
ル光分波器で分離され得ず、上記光受信器に受信されな
い。従って、異なった波長の複数の光信号をそれぞれ独
立に監視することが出来る。Further, when the wavelength division multiplex transmission system operates normally, a plurality of optical signals of different wavelengths are separated by the tunable optical demultiplexer and all are independently received by the optical receiver. However, when a failure occurs in the wavelength division multiplexing transmission system, only an optical signal of a certain wavelength is not propagated to the tunable optical demultiplexer and the optical receiver and cannot be separated by the tunable optical demultiplexer. Not received by the optical receiver. Therefore, it is possible to independently monitor a plurality of optical signals having different wavelengths.
［実施例］ 次に本発明の実施例を添付図面に従い説明する。[Embodiment] Next, an embodiment of the present invention will be described with reference to the accompanying drawings.
第１図は本発明の一実施例を示す監視機能付波長伝送
モジュールであり、第３図の局８側のモジュール構成
（光集積回路）に対応するモジュール構成図である。FIG. 1 is a wavelength transmission module with a monitoring function showing an embodiment of the present invention, and is a module configuration diagram corresponding to the module configuration (optical integrated circuit) on the station 8 side in FIG.
この監視機能付波長伝送モジュール40は、主として、
光送信部１、光受信部２、光合分波部10、および例えば
２×２型の光スイッチ11からなる。The wavelength transmission module 40 with a monitoring function is mainly
An optical transmitter 1, an optical receiver 2, an optical multiplexer / demultiplexer 10, and a 2 × 2 type optical switch 11, for example.
光合分波部10は、同一構造の方向性結合器12、13、お
よび14を組み合わせた構成のものを用いてある（井本、
佐野、宮崎、高崎、前田共著の“導波路型光合分波器”
電子情報通信学会、光・量子エレクトロニクス研究会OQ
E87−７、PP.47〜53参考）。上記方向性結合器12、13、
および14は波長λ2の光信号を分波するように構成され
ている。即ち、光合分波部10に入射した波長λ2の光信
号は方向性結合器12で分波され、次いで方向性結合器14
で同様に分波されて光受信部２に入力される。光送信部
１からの波長λ1の光信号は光合分波部３に入射され、
方向性結合器13、12で分波されずに導波されて光スイッ
チ11に入力される。The optical multiplexer / demultiplexer 10 has a configuration in which directional couplers 12, 13, and 14 having the same structure are combined (Imoto,
"Waveguide type optical multiplexer / demultiplexer" written by Sano, Miyazaki, Takasaki and Maeda.
Institute of Electronics, Information and Communication Engineers, Opto-Quantum Electronics Research Group OQ
See E87-7, PP.47-53). The directional coupler 12, 13,
And 14 are configured to demultiplex the optical signal of wavelength λ 2 . That is, the optical signal of wavelength λ 2 incident on the optical multiplexer / demultiplexer 10 is demultiplexed by the directional coupler 12, and then the directional coupler 14
Is similarly demultiplexed and input to the optical receiver 2. Wavelength lambda 1 of the optical signal from the optical transmission unit 1 is incident on the optical multiplexing and demultiplexing unit 3,
The light is guided into the optical switch 11 without being demultiplexed by the directional couplers 13 and 12.
光スイッチ11は、まったく同じ構造寸法を持つ２つの
単一モード導波路を近接して配置させ、結合領域にプレ
ーナ電極15、16を配置したものである（西原、春名、栖
原共著の“光集積回路”、オーム社発行、昭和60年２月
25日第１版第１刷発行、PP.304〜306参考）。光スイッ
チ11は直流電源17による印加電圧Ｖによって２つの導波
路を伝搬する導波光に伝搬定数差Δβを生じさせ、例え
ば矢印18のごとく伝搬してきた波長λ1の光信号を矢印1
9または矢印20のごとく伝搬させることができる。ま
た、矢印21の如く伝搬してきた波長λ2の光信号を矢印2
2または矢印23の如く伝搬させることができる。即ち、
矢印18（21）の光信号が矢印20（23）へ伝搬する条件と
して、 Δβ＝０、L/l＝2V＋１（Ｖ＝０、１、２、…） …
（１） を満足するようにプレーナ電圧15、16に対する印加電圧
Ｖを調整し、 また、矢印18（21）の光信号が矢印19（22）へ伝搬す
る条件として、 (l/L)2＋（Δβl/π）2＝(2V)2 ……（２） 但し、l:結合部の長さ、L:完全結合長を満足するよう
にプレーナ電圧15、16に対する印加電圧Ｖを調整するこ
とにより、自局および他局からの光信号を監視したり、
双方向通信を行ったりすることができる。通常の双方向
通信は式（２）を満足するように印加電圧Ｖを調整し、
自局および他局からの光信号を監視したいときには式
（１）を満足するように印加電圧Ｖを調整する。ここ
で、自局の光信号の監視は、矢印18から矢印20の如く伝
搬してきた光信号を光受信器24で受信することにより行
なわれる。この場合、例えば、光受信器24で受信した信
号レベルが初期値からどの程度劣化したかを比較するこ
とにより、光送信部１の取換えの判断を行うことができ
る。また、他局からの光信号の監視は矢印21から矢印23
の如く伝搬してきた光信号を光受信器25で受信すること
により行う。The optical switch 11 has two single-mode waveguides having exactly the same structural dimensions arranged close to each other, and the planar electrodes 15 and 16 arranged in the coupling region (Nishihara, Haruna, and Suhara “Optical Integration”). Circuit ", published by Ohmsha, February 1985
25th 1st edition 1st printing issue, PP.304-306 reference). The optical switch 11 produces a propagation constant difference Δβ in the guided light propagating in the two waveguides by the voltage V applied from the DC power supply 17, and the optical signal of the wavelength λ 1 propagated as indicated by arrow 18 is indicated by arrow 1
It can be propagated as 9 or arrow 20. In addition, the optical signal of wavelength λ 2 propagated as indicated by arrow 21 is indicated by arrow 2
2 or can be propagated as indicated by arrow 23. That is,
As conditions for the optical signal of arrow 18 (21) to propagate to arrow 20 (23), Δβ = 0, L / l = 2V + 1 (V = 0, 1, 2, ...) ...
The applied voltage V to the planar voltages 15 and 16 is adjusted so as to satisfy (1), and as a condition for the optical signal of the arrow 18 (21) to propagate to the arrow 19 (22), (l / L) 2 + (Δβl / π) 2 = (2V) 2 (2) However, by adjusting the applied voltage V to the planar voltages 15 and 16 so that l: the length of the coupling portion and L: the complete coupling length are satisfied. , Monitor optical signals from your station and other stations,
Bidirectional communication can be performed. In ordinary bidirectional communication, the applied voltage V is adjusted so as to satisfy the equation (2),
When it is desired to monitor the optical signals from the own station and other stations, the applied voltage V is adjusted so as to satisfy the expression (1). Here, the monitoring of the optical signal of the own station is performed by receiving the optical signal propagating from the arrow 18 to the arrow 20 by the optical receiver 24. In this case, for example, the replacement of the optical transmitter 1 can be determined by comparing how much the signal level received by the optical receiver 24 deteriorates from the initial value. In addition, the monitoring of optical signals from other stations is monitored from arrow 21 to arrow 23.
The optical signal propagated as described above is received by the optical receiver 25.
次に本発明の別の実施例について説明する。 Next, another embodiment of the present invention will be described.
第２図に示すように、この別の実施例による監視機能
付波長多重伝送モジュール41は、４波長（λ1、λ2、λ
3およびλ4）多重伝送モジュールの構成例（光集積回
路）であり、主として、光送信部１、27、光受信部２、
28、光合分波器26、例えば２×２型の光スイッチ11より
なる。このように本発明による実施例では波長多重数は
何波長でも適用することができる。As shown in FIG. 2, the wavelength division multiplex transmission module 41 with a monitoring function according to the other embodiment has four wavelengths (λ 1 , λ 2 , λ).
3 and λ 4 ) is a configuration example (optical integrated circuit) of the multiplex transmission module, which mainly includes the optical transmitters 1 and 27, the optical receiver 2,
28, an optical multiplexer / demultiplexer 26, for example, a 2 × 2 type optical switch 11. Thus, in the embodiment according to the present invention, any number of wavelengths can be applied to the wavelength division multiplex.
光合分波器26は、方向性結合器29、30と、マッハシェ
ンダー型光分波器31とよりなる。方向性結合器29は波長
λ2の光信号を分波し、波長λ1の光信号をそのまま導波
する構成であり、方向性結合器30は波長λ4の光信号を
分波し、波長λ3の光信号をそのまま導波する構成のも
のである。マッハシェンダー型光分波器31は、3dB（デ
シベル）のカプラ32a、32bと、伝送路長がｌ1とl2との
異なる導波路33、34から構成されている。なお、光スイ
ッチ11の構成は第１図で示した実施例の場合と同じであ
る。但し、監視部の構成が異なっている。即ち、矢印35
の如く伝搬してくる光信号は、波長λ1、λ3の光信号で
あり、光受信器24の前に設けられたチューナブル光分波
器36でそれら異波長の光信号を分離して、光受信器24で
受信される。このようにして上記波長λ1、λ3の光信号
を独立に監視することができる。同様に、矢印38の如く
伝搬してきた光信号にも波長λ2とλ4の光信号が含まれ
ているので、チューナブル光分波器25によって各々独立
に光信号を監視することができる。また、光受信器24、
25にそれぞれの波長値をモニタする装置（例えば、光波
長計、光スペクトラムアナライザ等）を設けておけば、
それぞれの中心波長ずれをモニタすることも可能であ
る。そして、このモニタ信号を光送信部１、27にフィー
ドバックすれば、中心波長を常に一定に保って光信号を
送出することができる。また、光強度も同様にフィード
バックすれば、光強度の制御も可能である。The optical multiplexer / demultiplexer 26 is composed of directional couplers 29 and 30 and a Machshender type optical demultiplexer 31. The directional coupler 29 is configured to demultiplex the optical signal of wavelength λ 2 and guide the optical signal of wavelength λ 1 as it is, and the directional coupler 30 demultiplexes the optical signal of wavelength λ 4 to The optical signal of λ 3 is directly guided. The Machshender type optical demultiplexer 31 is composed of 3 dB (decibel) couplers 32a and 32b and waveguides 33 and 34 having different transmission line lengths l 1 and l 2 . The structure of the optical switch 11 is the same as that of the embodiment shown in FIG. However, the configuration of the monitoring unit is different. That is, arrow 35
The optical signals propagating as shown in the figure are optical signals of wavelengths λ 1 and λ 3 , and the tunable optical demultiplexer 36 provided in front of the optical receiver 24 separates the optical signals of different wavelengths. , Received by the optical receiver 24. In this way, the optical signals of the wavelengths λ 1 and λ 3 can be independently monitored. Similarly, since the optical signals propagated as indicated by the arrow 38 also include the optical signals of wavelengths λ 2 and λ 4 , the tunable optical demultiplexer 25 can monitor the optical signals independently. Also, the optical receiver 24,
If a device for monitoring each wavelength value is provided in 25 (for example, optical wavelength meter, optical spectrum analyzer, etc.),
It is also possible to monitor the deviation of each center wavelength. Then, if this monitor signal is fed back to the optical transmitters 1 and 27, the central wavelength can always be kept constant and the optical signal can be transmitted. Further, if the light intensity is similarly fed back, it is possible to control the light intensity.
［発明の効果］ 以上、本発明によれば、波長多重伝送システムにおい
て、光ファイバの切断・劣化、自局および他局側の光送
・受信部の故障、光送信部の中心波長変動等による通信
不能状態の監視を自局および他局の各局内で行うことが
でき、通信不能に対し早期対策が打てる。[Advantages of the Invention] As described above, according to the present invention, in a wavelength division multiplexing transmission system, due to cutting / deterioration of an optical fiber, failure of an optical transmitter / receiver at the local station or another station, fluctuation of center wavelength of an optical transmitter, etc. The incommunicable state can be monitored in each station, the local station and other stations, and early countermeasures can be taken against the incommunicable state.
また、チューナブル光分波器を設けたことにより、異
なった波長の複数の光信号をそれぞれ独立に監視するこ
とが出来る。Further, by providing the tunable optical demultiplexer, it is possible to independently monitor a plurality of optical signals having different wavelengths.
第１図は本発明の実施例を示す構成図、第２図は本発明
の別の実施例を示す構成図、第３図は従来例を示すブロ
ック構成図である。 図中、１及び27は光送信部、２及び28は光受信部、10及
び26は光合分波部、４は光ファイバ、40及び41は波長多
重伝送モジュール、11は光スイッチ、24及び25は光受信
器、36及び37はチューナブル光分波器である。FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is a block diagram showing another embodiment of the present invention, and FIG. 3 is a block diagram showing a conventional example. In the figure, 1 and 27 are optical transmitters, 2 and 28 are optical receivers, 10 and 26 are optical multiplexer / demultiplexers, 4 is an optical fiber, 40 and 41 are wavelength multiplexing transmission modules, 11 is an optical switch, and 24 and 25. Are optical receivers, and 36 and 37 are tunable optical demultiplexers.
Claims (2)
び波長λ2の光信号を受信する光受信部を有し、それら
が光合分波部を介して１本の光ファイバの一方端と接続
されてなる双方向光通信を行うための波長多重伝送モジ
ュールにおいて、２つの単一モード導波路を近接させて
形成した光結合領域にプレーナ電極を配置してなる光ス
イッチを上記光合分波部と上記光ファイバとの間に設け
て、この光スイッチを構成する一方の上記単一モード導
波路の両端のそれぞれに上記光合分波部および上記光フ
ァイバを接続し、残りの上記単一モード導波路の両端の
それぞれに監視用光受信器を接続し、上記光スイッチの
上記プレーナ電極への印加電圧を制御することにより、
自局の上記光送信部からの波長λ1の光信号および上記
光ファイバを伝送してきた他局からの波長λ2の光信号
を上記監視用光受信器側へ切り替えて各波長の光信号を
それぞれ所定の監視用光受信器で受信し、各波長の光信
号をそれぞれ独立に監視することを特徴とする監視機能
付波長多重伝送モジュール。 1. An optical transmission section for transmitting an optical signal of wavelength λ 1 and an optical reception section for receiving an optical signal of wavelength λ 2 , which are one of one optical fibers via an optical multiplexing / demultiplexing section. In the wavelength division multiplexing transmission module for performing two-way optical communication connected to an end, an optical switch having a planar electrode arranged in an optical coupling region formed by bringing two single mode waveguides close to each other is used as the optical coupling / decoupling device. The optical multiplexer / demultiplexer is provided between the wave portion and the optical fiber, and the optical multiplexer / demultiplexer and the optical fiber are connected to both ends of one of the single mode waveguides constituting the optical switch. By connecting a monitoring optical receiver to each of both ends of the mode waveguide and controlling the voltage applied to the planar electrode of the optical switch,
The optical signal of the wavelength λ 1 from the optical transmitter of the own station and the optical signal of the wavelength λ 2 from the other station that has transmitted the optical fiber are switched to the optical receiver side for monitoring, and the optical signal of each wavelength is switched. A wavelength division multiplexing transmission module with a monitoring function, characterized in that the signals are respectively received by predetermined optical receivers for monitoring and the optical signals of respective wavelengths are independently monitored.
するため上記光スイッチと上記光受信器との間にチュー
ナブル光分波器を設けたことを特徴とする請求項１の監
視機能付波長多重伝送モジュール。2. A tunable optical demultiplexer is provided between the optical switch and the optical receiver for demultiplexing the optical signal received by the optical receiver. WDM module with monitoring function.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63202639A JP2518021B2 (en) | 1988-08-16 | 1988-08-16 | WDM module with monitoring function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63202639A JP2518021B2 (en) | 1988-08-16 | 1988-08-16 | WDM module with monitoring function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0252316A JPH0252316A (en) | 1990-02-21 |
| JP2518021B2 true JP2518021B2 (en) | 1996-07-24 |
Family
ID=16460671
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63202639A Expired - Lifetime JP2518021B2 (en) | 1988-08-16 | 1988-08-16 | WDM module with monitoring function |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2518021B2 (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04104608U (en) * | 1991-02-19 | 1992-09-09 | 日立電線株式会社 | Waveguide type wavelength division multiplexing transmitter/receiver module |
| FR2685498B1 (en) * | 1991-12-23 | 1994-12-30 | Corning Inc | OPTICAL DEVICE WITH PROXIMITY COUPLING BETWEEN TWO INTEGRATED REDUCED WAVELIGHT GUIDES AND INTEGRATED OPTICAL COMPONENT USING THE SAME. |
| JPH05333248A (en) * | 1992-06-01 | 1993-12-17 | Hitachi Cable Ltd | Wavelength division multiplex system transmit-receive module and optical transmitter using same |
| JP2859112B2 (en) * | 1993-11-26 | 1999-02-17 | 日本電気 株式会社 | Light emitting array module |
| US10962710B2 (en) * | 2018-06-04 | 2021-03-30 | The Boeing Company | Multidimensional optical waveguide in planar dielectric structures |
| CN114815086B (en) * | 2021-01-28 | 2024-06-04 | 华为技术有限公司 | Integrated optical transceiver and optical line terminal |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6399631A (en) * | 1986-10-15 | 1988-04-30 | Matsushita Electric Ind Co Ltd | Monitoring system |
-
1988
- 1988-08-16 JP JP63202639A patent/JP2518021B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0252316A (en) | 1990-02-21 |
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