JP4876172B2 - 波長非依存wdm受動型光加入者網のためのolt及びonu装置及び方法 - Google Patents
波長非依存wdm受動型光加入者網のためのolt及びonu装置及び方法 Download PDFInfo
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- H04J14/0249—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for upstream transmission, e.g. ONU-to-OLT or ONU-to-ONU
- H04J14/025—Wavelength allocation for communications one-to-one, e.g. unicasting wavelengths in WDM-PON for upstream transmission, e.g. ONU-to-OLT or ONU-to-ONU using one wavelength per ONU, e.g. for transmissions from-ONU-to-OLT or from-ONU-to-ONU
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Description
前記のような本発明で、電話局社内下向き光送信装置は、多波長光源(MWS)モジュールあるいは広域光源(BLS)モジュールから出力された光信号を各WDMチャンネル別に逆多重化した後に反射型光増幅器(Reflective Semiconductor Optical Amplifier)(波長無依存半導体光増幅器)に注入させる。これにより、反射型光増幅器は、プロトコル処理部から入力されたそれぞれの下向き電気信号に対して光信号を生成するが、このように生成されたWDMチャンネル別下向き光信号は、電話局社内波長多重化器(波長結合器)によって波長多重化されて加入者側に送信される。
ONU2620の動作を説明すれば次の通りである。
Claims (8)
- 入力光信号を反射する反射面と、
前記反射面の一側面に位置し、前記入力光信号の極性と反転された第1信号及び前記反射面を通じて反射された入力光信号を出力光信号に変調する第2信号が結合されて注入される増幅型半導体と、を備えることを特徴とする単一アクティブ領域を有する反射型半導体光増幅器。 - 入力光信号を反射する反射面と、
前記反射面の一側面に位置し、前記入力光信号の極性とは反転された信号が注入される背面部と、前記背面部の他側面に位置し、前記入力光信号を前記背面部に通過させ、前記反射面から反射された入力光信号を出力光信号に変調する信号が注入される前面部から構成された増幅型半導体と、を備えることを特徴とする2つのアクティブ領域を有する反射型半導体光増幅器。 - 入力光信号の極性とは反転された信号が注入されて前記入力光信号の振幅を平坦化させる第1アクティブ領域と、
前記第1アクティブ領域の一側面に位置し、DC電流が注入されて前記第1アクティブ領域を通過した前記入力光信号を光増幅する第2アクティブ領域と、
前記第2アクティブ領域の他側面に位置し、前記第2アクティブ領域を通過した前記入力光信号を出力光信号に変調する信号が注入される第3アクティブ領域と、を備えることを特徴とする3つのアクティブ領域を有する半導体光増幅器。 - 前記3つのアクティブ領域を有する半導体光増幅器の第1アクティブ領域と第3アクティブ領域との他側面各々にSSC(Spot Size Converting)領域が付け加えられたことを特徴とする請求項3に記載の3つのアクティブ領域を有する半導体光増幅器。
- 入力光信号を第1信号と第2信号とに分岐して出力する分配器と、
前記第2信号を反射面を通じて反射し、前記第2信号の極性と反転された信号及び前記反射面を通じて反射された第2信号を出力光信号に変調する信号が結合されて注入される単一アクティブ領域を有する反射型半導体光増幅器と、
前記第1信号を電流信号に変換するデータPD部と、
前記データPD部から伝えられた電流信号を増幅して電圧信号に変換する伝送増幅部と、
前記伝送増幅部から伝えられた電圧信号を再増幅する制限増幅部と、
前記制限増幅部から出力される先帰還信号の位相と反射型半導体光増幅器に入力される下向き光信号の位相とを反射型半導体光増幅器圧力光が最適に平坦化されるように調節するための第1RF遅延回路と、
前記第1RF遅延回路の出力は、上向き信号が“1”である時のみ第1RF遅延回路の出力信号が通過され、上向き信号が“0”である時は、出力されないようにするANDゲートと、
前記ANDゲートに入力される上向き信号の位相と反射型半導体光増幅器に入力される上向き信号の位相とを最適の状態に調節するための第2RF遅延回路と、
前記第1RF遅延回路を通じた電気的な遅延を光的補完する光遅延線と、
前記ANDゲート出力を電流信号に変換する第1LDドライバーと、
前記第2RF遅延回路出力を電流信号に変換する第2LDドライバーと、を備えることを特徴とする反射型半導体光増幅器の駆動装置。 - 前記伝送増幅部から伝えられた、前記第1信号とは極性が反転された電圧信号を、前記第2信号の光振幅の平坦化に適したレベルの平坦化信号に増幅するRF増幅部と、
前記RF増幅部から伝えられた平坦化信号を、前記第2信号が最適に平坦化されるように出力時間を遅延するRF遅延部と、
前記RF遅延部から伝えられた平坦化信号と前記第2信号を出力光信号に変調する信号とを結合して前記反射型半導体光増幅器の単一アクティブ領域に注入する信号結合器と、を備えることを特徴とする請求項5に記載の反射型半導体光増幅器の駆動装置。 - 前記伝送増幅部から伝えられた電圧信号を再増幅して前記RF増幅部に伝達する制限増幅部がさらに備えられたことを特徴とする請求項6に記載の反射型半導体光増幅器の駆動装置。
- 前記反射型半導体光増幅器は、入力光信号を反射する反射面と前記反射面の一側面に位置して前記入力光信号の極性と反転された信号が注入される背面部と、前記背面部の他側面に位置して前記入力光信号を前記背面部に通過させ、前記反射面から反射された入力光信号を出力光信号に変調する信号が注入される前面部とから構成された増幅型半導体を備えることを特徴とする2つのアクティブ領域を有する反射型半導体光増幅器であり、
前記第1LDドライバーから出力される平坦化信号は、前記2つのアクティブ領域を有する反射型半導体光増幅器の背面部に注入され、
前記第2信号を出力光信号に変調する信号は前記2つのアクティブ領域を有する反射型半導体光増幅器の前面部に注入されることを特徴とする請求項5に記載の反射型半導体光増幅器の駆動装置。
Applications Claiming Priority (9)
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KR10-2006-0102456 | 2006-10-20 | ||
KR1020060102456A KR20070108422A (ko) | 2006-01-09 | 2006-10-20 | 동적 전류 주입에 의한 하향 광신호를 재활용하는 반도체광 증폭기 및 그 구동장치 |
KR10-2007-0001140 | 2007-01-04 | ||
KR1020070001140A KR100809436B1 (ko) | 2006-01-09 | 2007-01-04 | 동적 전류 주입을 통해 하향 광신호를 재활용하기 위한선궤환전류 구동장치 및 반도체 광 증폭기 |
KR10-2007-0023629 | 2007-03-09 | ||
KR1020070023629A KR100875922B1 (ko) | 2006-01-09 | 2007-03-09 | Wdm 수동형 광가입자망에서의 파장 무의존 광원을이용한 하향 광송신 장치 및 그 방법과, 그를 이용한광선로 종단 시스템 |
KR10-2007-0068074 | 2007-07-06 | ||
PCT/KR2007/003308 WO2008047996A1 (en) | 2006-01-09 | 2007-07-06 | Apparatus and method for olt and onu for wavelength agnostic wavelength-division multiplexed passive optical networks |
KR1020070068074A KR100922727B1 (ko) | 2006-01-09 | 2007-07-06 | 파장 비의존 wdm 수동형 광가입자망을 위한 olt 및onu 장치 및 방법 |
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US20110026923A1 (en) | 2011-02-03 |
US8644711B2 (en) | 2014-02-04 |
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