JP2021515982A - 光増幅器の監視装置、光増幅システム、及び増幅光信号の監視方法 - Google Patents
光増幅器の監視装置、光増幅システム、及び増幅光信号の監視方法 Download PDFInfo
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Abstract
Description
図1は、本発明の第1の実施形態による光増幅器の監視装置の構成を示すブロック図である。光増幅器の監視装置10は、光フィルタ手段11と、光電変換手段12と、スペクトル情報生成手段13とを含む。
次に、本発明の第2の実施形態について説明する。
次に、本発明の第3の実施形態について説明する。
11 光フィルタ手段
12 光電変換手段
13 スペクトル情報生成手段
20、100、200、300、400、500、600、700 光増幅システム
21 監視手段
22 光増幅手段
23 利得フィルタリング手段
90 監視光ビーム
101、102、103、104、201、202、203、204、401、501、601 利得媒体
111、112、113、114、211、212、213、214、411...41N、511、512、611...61N 励起レーザ
121、122、123、124、221、222、223、224、421...42N、521、522、621...62N 制御回路
131、132、133、134、231、232、233、234、431...43N、531、532、631...63N クロック発振器
141、142、143、144、241、242、243、244、441...44N、541、542、543、544、641...64N 監視光ビーム
150、450、550、650 光結合器
160 波長可変光フィルタ
170、271、272、273、274、471...47N、571、572、671...67N フォトダイオード
180、281、282、283、284、481...48N、581、582、681...68N 電気帯域通過フィルタ
190、285、286、287、288、45(N+1)...45(2xN)、554、555、65(N+1)...65(2N) 電気回路
191、291、292、293、294、391、392、393、394、491...49N、591、592、691...69N 制御信号
251、252、253、254、451...45N 光ビーム
261、262、263、264、461...46N、561、562、661...66N 光帯域通過フィルタ
301 光増幅部
311、312、313、314 動的利得フィルタ
513、514 ディバイダ
545、546 光遅延部
610 マルチモード励起レーザ
701 MC−EDFA
711 マルチコア動的利得フィルタ
Claims (22)
- 光増幅器の監視光ビームを受信し、所定範囲の波長帯域を有するフィルタされた監視光ビームを送信する光フィルタ手段と、
前記フィルタされた監視光ビームを監視信号に変換する光電変換手段と、
前記監視信号に基づいて、前記光増幅器の出力のスペクトルプロファイルについての情報を含むスペクトル情報を生成するスペクトル情報生成手段、を有する
光増幅器の監視装置。 - 前記光フィルタ手段は、中心波長が調整可能である波長可変光フィルタを含み、
前記スペクトル情報生成手段は、前記中心波長をスキャンすることにより前記スペクトル情報を生成する
請求項1に記載した光増幅器の監視装置。 - 前記光フィルタ手段は、異なる固定中心波長と固定通過帯域とをそれぞれ有する複数の光帯域通過フィルタを含み、通過帯域ごとに前記フィルタされた監視光ビームを送信し、
前記光電変換手段は、通過帯域ごとの前記フィルタされた監視光ビームを通過帯域ごとの前記監視信号にそれぞれ変換する複数の光検出器を含み、
前記スペクトル情報生成手段は、通過帯域ごとの前記監視信号に基づいて前記スペクトル情報を生成する
請求項1に記載した光増幅器の監視装置。 - 前記光増幅器から複数の監視光ビームを受信し、前記監視光ビームを前記光フィルタ手段へ送信する光結合手段をさらに含む
請求項1、2、及び3のいずれか一項に記載した光増幅器の監視装置。 - 監視手段と、
光増幅手段、を有し、
前記監視手段は、
前記光増幅手段の監視光ビームを受信し、所定範囲の波長帯域を有するフィルタされた監視光ビームを送信する光フィルタ手段と、
前記フィルタされた監視光ビームを監視信号に変換する光電変換手段と、
前記監視信号に基づいて、前記光増幅手段の出力のスペクトルプロファイルについての情報を含むスペクトル情報を生成するスペクトル情報生成手段、を有する
光増幅システム。 - 前記スペクトル情報に基づいて、前記スペクトルプロファイルを等化する利得フィルタリング手段をさらに有する
請求項5に記載した光増幅システム。 - 前記光フィルタ手段は、中心波長が調整可能である波長可変光フィルタを含み、
前記スペクトル情報生成手段は、前記中心波長をスキャンすることにより前記スペクトル情報を生成する
請求項5または6に記載した光増幅システム。 - 前記光フィルタ手段は、異なる固定中心波長と固定通過帯域とをそれぞれ有する複数の光帯域通過フィルタを含み、通過帯域ごとに前記フィルタされた監視光ビームを送信し、
前記光電変換手段は、通過帯域ごとの前記フィルタされた監視光ビームを通過帯域ごとの前記監視信号にそれぞれ変換する複数の光検出器を含み、
前記スペクトル情報生成手段は、通過帯域ごとの前記監視信号に基づいて前記スペクトル情報を生成する
請求項5または6に記載した光増幅システム。 - 前記監視手段は、前記光増幅手段から複数の監視光ビームを受信し、前記監視光ビームを前記光フィルタ手段へ送信する光結合手段をさらに含む
請求項5、6、7、及び8のいずれか一項に記載した光増幅システム。 - 前記監視手段は、光結合手段をさらに含み、
前記光増幅手段は、複数の利得媒体を含み、
前記光結合手段は、前記複数の利得媒体から複数の監視光ビームを受信し、前記複数の監視光ビームの一を前記波長可変光フィルタへ送信する
請求項7に記載した光増幅システム。 - 前記光結合手段は、光スイッチおよび光カプラーの一方を含む
請求項10に記載した光増幅システム。 - 前記監視手段は、電気帯域通過フィルタをさらに含み、
前記複数の利得媒体のそれぞれは、周波数成分が付加された励起光ビームによって励起され、
前記複数の監視光ビームのそれぞれは、前記周波数成分を有し、
前記電気帯域通過フィルタは、前記周波数成分を有する前記監視信号を抽出する
請求項10または11に記載した光増幅システム。 - 前記監視手段は、光結合手段をさらに含み、
前記光増幅手段は、複数の利得媒体を含み、
前記光結合手段は、前記複数の利得媒体から複数の監視光ビームを受信し、前記複数の監視光ビームのそれぞれを前記複数の光帯域通過フィルタのそれぞれへ送信する
請求項8に記載した光増幅システム。 - 前記光結合手段は、入力ポート及び出力ポートを有する光カプラーを含み、
前記出力ポートの数は前記入力ポートの数以上である
請求項13に記載した光増幅システム。 - 前記監視手段は、複数の電気帯域通過フィルタをさらに含み、
前記複数の利得媒体のそれぞれは、周波数成分が付加された励起光ビームによって励起され、
前記複数の監視光ビームのそれぞれは、前記周波数成分を有し、
前記電気帯域通過フィルタは、通過帯域ごとの前記周波数成分を有する前記監視信号を抽出する
請求項13または14に記載した光増幅システム。 - 前記監視手段は、同じ周波数成分を有する前記複数の監視光ビームの一を遅延させる光遅延手段をさらに含み、
前記スペクトル情報生成手段は、同じ周波数成分を有する前記複数の監視光ビームを分離することによって回復される前記監視信号に基づいて、前記スペクトル情報を生成する
請求項15に記載した光増幅システム。 - 前記複数の利得媒体のそれぞれは、マルチコアファイバの各コアに含まれる
請求項13、14、15、及び16のいずれか一項に記載した光増幅システム。 - 前記マルチコアファイバのクラッド層を励起するように構成されたマルチモード励起レーザをさらに有する
請求項17に記載した光増幅システム。 - 増幅光信号の一部である監視光ビームを取得し、
所定範囲の波長帯域を有するフィルタされた監視光ビームを生成し、
前記フィルタされた監視光ビームを監視信号に変換し、
前記監視信号に基づいて、前記増幅光信号のスペクトルプロファイルについての情報を含むスペクトル情報を生成する
増幅光信号の監視方法。 - 前記スペクトル情報を生成することは、前記波長帯域の中心波長をスキャンすることを含む
請求項19に記載した増幅光信号の監視方法。 - 前記フィルタされた監視光ビームを生成することは、異なる中心波長と通過帯域とをそれぞれ有する複数のフィルタされた監視光ビームを生成することを含み、
前記フィルタされた監視光ビームを変換することは、前記複数のフィルタされた監視光ビームのそれぞれを、通過帯域ごとの前記監視信号に変換することを含み、
前記スペクトル情報を生成することは、通過帯域ごとの前記監視信号に基づいて前記スペクトル情報を生成することを含む
請求項19に記載した増幅光信号の監視方法。 - 前記増幅光信号の一部である複数の監視光ビームを結合し、前記監視光ビームを生成することをさらに含む
請求項19、20、及び21のいずれか一項に記載した増幅光信号の監視方法。
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