JP2006025446A5 - - Google Patents
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- JP2006025446A5 JP2006025446A5 JP2005224316A JP2005224316A JP2006025446A5 JP 2006025446 A5 JP2006025446 A5 JP 2006025446A5 JP 2005224316 A JP2005224316 A JP 2005224316A JP 2005224316 A JP2005224316 A JP 2005224316A JP 2006025446 A5 JP2006025446 A5 JP 2006025446A5
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- signal light
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Claims (10)
上記処理に依存する上記信号光のスペクトラムを検出するモニタ手段とを備え、
上記モニタ手段は、
上記主光路から上記信号光の一部であるモニタ用信号光を取り出す手段と、
上記モニタ用信号光を少なくとも該信号光の波長を含む帯域において分光する手段と、
該分光された光を受ける位置に複数の光／電気変換エレメントを有する受光素子アレイと、
該受光素子アレイの出力信号に基づく演算を行って上記信号光のスペクトラムを算出する手段とを含み、
上記光処理手段は光増幅器を含み、
上記モニタ用信号光は、上記主光路における上記光増幅器の上流側及び下流側にそれぞれ対応する第１及び第２のモニタ用信号光からなり、
上記光処理手段は、上記第１及び第２のモニタ用信号光を選択的に上記分光する手段へ供給する光スイッチをさらに含む光システム。 Optical processing means for performing at least one of relaying, branching, and switching on the wavelength division multiplexed signal light transmitted by the main optical path;
Monitoring means for detecting the spectrum of the signal light depending on the processing,
The monitoring means includes
Means for taking out the monitor signal light which is a part of the signal light from the main optical path;
Means for dispersing the monitor signal light in a band including at least the wavelength of the signal light;
A light receiving element array having a plurality of optical / electrical conversion elements at a position for receiving the dispersed light;
Means for performing a calculation based on an output signal of the light receiving element array to calculate a spectrum of the signal light,
The light processing means includes an optical amplifier,
The monitoring signal light includes first and second monitoring signal lights corresponding to the upstream side and the downstream side of the optical amplifier in the main optical path, respectively.
The optical system further includes an optical switch for supplying the first and second monitor signal lights to the means for selectively dispersing the light.
上記モニタ用信号光の信号対雑音比を検出する手段と、
該検出された信号対雑音比に基づき上記モニタ用信号光における真の信号パワーを検出する手段と、
該検出された真の信号パワーが一定になるように上記光増幅器を制御する手段とを含む請求項１に記載の光システム。 The light processing means is
Means for detecting a signal-to-noise ratio of the monitoring signal light;
Means for detecting a true signal power in the monitoring signal light based on the detected signal-to-noise ratio;
The optical system according to claim 1, further comprising means for controlling the optical amplifier so that the detected true signal power is constant.
上記第１及び第２のモニタ用信号光にそれぞれ対応する第１及び第２の信号対雑音比を検出する手段と、
該検出された第１及び第２の信号対雑音比の比で定義される雑音指数を算出する手段とをさらに含む請求項１に記載の光システム。 The light processing means is
Means for detecting first and second signal-to-noise ratios corresponding to the first and second monitor signal lights, respectively;
The optical system of claim 1, further comprising means for calculating a noise figure defined by the ratio of the detected first and second signal-to-noise ratios.
モニタ信号光として上記光ファイバからＷＤＭ信号光の一部を分岐する分岐手段と、
該分岐された光を受ける位置に複数の光／電気変換エレメントを有する受光素子アレイと、
上記分岐手段に接続され、上記モニタ信号光から上記ＷＤＭ信号光のスペクトラムを計測する監視手段と、
上記複数チャネルの信号光を出力する複数の光源と、
上記スペクトラムに基づき各チャネルの信号光の波長を検出する手段と、
検出された各波長が一定になるように上記各光源のバイアス電流又は温度を制御する手段と、
を備えた光システム。 An optical communication system for transmitting a signal of a plurality of channels that are wavelength division multiplexed (WDM) through an optical fiber through a main optical path,
Branching means for branching a part of the WDM signal light from the optical fiber as the monitor signal light;
A light receiving element array having a plurality of optical / electrical conversion elements at a position for receiving the branched light;
Monitoring means connected to the branching means for measuring the spectrum of the WDM signal light from the monitor signal light;
A plurality of light sources for outputting the signal light of the plurality of channels;
Means for detecting the wavelength of the signal light of each channel based on the spectrum;
Means for controlling the bias current or temperature of each light source such that each detected wavelength is constant;
With light system.
上記モニタ信号光の信号対雑音比を検出する手段と、
該検出された信号対雑音比に基づき上記モニタ信号光における真の信号パワーを検出する手段と、
該検出された真の信号パワーが一定になるように上記光増幅器の駆動回路を制御する手段とを含む請求項５に記載の光システム。 Furthermore, it has an optical amplifier,
Means for detecting a signal-to-noise ratio of the monitor signal light;
Means for detecting a true signal power in the monitor signal light based on the detected signal-to-noise ratio;
6. An optical system according to claim 5, further comprising means for controlling a driving circuit of the optical amplifier so that the detected true signal power becomes constant.
上記モニタ信号光は、第１及び第２のモニタ信号光からなり、
上記分岐手段は、上記第１のモニタ信号光として上記光増幅器の上流側に位置する上記光ファイバからＷＤＭ信号光の一部を分岐する第１の分岐手段と、上記第２のモニタ信号光として上記光増幅器の下流側に位置する上記光ファイバからＷＤＭ信号光の一部を分岐する第２の分岐手段とを有し、
上記第１及び第２のモニタ信号光を上記監視手段へ供給する光スイッチをさらに含み、
上記第２のモニタ信号光のスペクトラムに基づき上記光増幅器の下流側の各チャネルの光出力パワーが一定となるように制御する手段を更に備え、
上記監視手段は、上記光スイッチに接続され、上記第１及び第２のモニタ信号光のいずれか一方のモニタ信号光から上記ＷＤＭ信号光のスペクトラムを計測し、
上記検出された各波長が一定になるように上記各光源のバイアス電流又は温度を制御する手段は、上記第１のモニタ信号光のスペクトラムに基づき制御する請求項５に記載の光システム。 Furthermore, it has an optical amplifier,
The monitor signal light is composed of first and second monitor signal lights,
The branching means includes a first branching means for branching a part of the WDM signal light from the optical fiber located upstream of the optical amplifier as the first monitor signal light, and the second monitor signal light. A second branching unit for branching a part of the WDM signal light from the optical fiber located downstream of the optical amplifier;
An optical switch for supplying the first and second monitor signal lights to the monitoring means;
Means for controlling the optical output power of each channel on the downstream side of the optical amplifier to be constant based on the spectrum of the second monitor signal light;
The monitoring means is connected to the optical switch, measures the spectrum of the WDM signal light from one of the first monitor signal light and the second monitor signal light,
6. The optical system according to claim 5, wherein the means for controlling the bias current or temperature of each light source so as to make the detected wavelengths constant is controlled based on the spectrum of the first monitor signal light.
モニタ信号光として上記光ファイバからＷＤＭ信号光の一部を分岐する分岐手段と、
上記分岐手段に接続され、上記モニタ信号光から上記ＷＤＭ信号光のスペクトラムを計測する監視手段と、
上記複数チャネルの信号光を出力する複数の光源と、
上記スペクトラムに基づき各チャネルの信号光の波長を検出する手段と、
上記検出する手段により検出された各波長に基づき、該検出された各波長が一定になるように上記各光源のバイアス電流又は温度を制御する手段とを備えることを特徴とする光システム。 An optical communication system for transmitting a signal of a plurality of channels that are wavelength division multiplexed (WDM) through an optical fiber through a main optical path,
Branching means for branching a part of the WDM signal light from the optical fiber as the monitor signal light;
Monitoring means connected to the branching means for measuring the spectrum of the WDM signal light from the monitor signal light;
A plurality of light sources for outputting the signal light of the plurality of channels;
Means for detecting the wavelength of the signal light of each channel based on the spectrum;
An optical system comprising: means for controlling bias current or temperature of each light source based on each wavelength detected by the detecting means so that each detected wavelength becomes constant .
上記モニタ信号光の信号対雑音比を検出する手段と、 Means for detecting a signal-to-noise ratio of the monitor signal light;
該検出された信号対雑音比に基づき上記モニタ信号光における真の信号パワーを検出する手段と、 Means for detecting true signal power in the monitor signal light based on the detected signal-to-noise ratio;
該検出された真の信号パワーが一定になるように上記光増幅器の駆動回路を制御する手段とを含む請求項８に記載の光システム。 9. An optical system according to claim 8, further comprising means for controlling a driving circuit of the optical amplifier so that the detected true signal power becomes constant.
上記モニタ信号光は、上記主光路における上記光増幅器の上流側及び下流側にそれぞれ対応する第１及び第２のモニタ信号光からなり、 The monitor signal light is composed of first and second monitor signal lights respectively corresponding to the upstream side and the downstream side of the optical amplifier in the main optical path,
上記第１及び第２のモニタ信号光を選択的に上記監視手段へ供給する光スイッチをさらに含み、 An optical switch that selectively supplies the first and second monitor signal lights to the monitoring means;
上記第２のモニタ信号光のスペクトラムに基づき上記光増幅器の下流側の各チャネルの光パワーが一定となるように制御する手段を更に備えた請求項８に記載の光システム。 9. The optical system according to claim 8, further comprising means for controlling the optical power of each channel on the downstream side of the optical amplifier to be constant based on the spectrum of the second monitor signal light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005224316A JP4213147B2 (en) | 2005-08-02 | 2005-08-02 | Light system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2005224316A JP4213147B2 (en) | 2005-08-02 | 2005-08-02 | Light system |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7214733A Division JPH0964819A (en) | 1995-08-23 | 1995-08-23 | Optical system |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2008250088A Division JP4319695B2 (en) | 2008-09-29 | 2008-09-29 | Light system |
Publications (3)
| Publication Number | Publication Date |
|---|---|
| JP2006025446A JP2006025446A (en) | 2006-01-26 |
| JP2006025446A5 true JP2006025446A5 (en) | 2007-01-11 |
| JP4213147B2 JP4213147B2 (en) | 2009-01-21 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2005224316A Expired - Lifetime JP4213147B2 (en) | 2005-08-02 | 2005-08-02 | Light system |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP4213147B2 (en) |
-
2005
- 2005-08-02 JP JP2005224316A patent/JP4213147B2/en not_active Expired - Lifetime
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