OPTICAL RECEIVER

To provide an optical receiver capable of restricting signal quality degradation of signal light.SOLUTION: An optical receiver 100 includes: a wavelength variable optical filter 110 for transmitting reception target signal light from wavelength multiplexed signal light; a light source 160 for output...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: KOMAKI KOSUKE, SHIGETA YUSUKE
Format: Patent
Sprache:eng ; jpn
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Beschreibung
Zusammenfassung:To provide an optical receiver capable of restricting signal quality degradation of signal light.SOLUTION: An optical receiver 100 includes: a wavelength variable optical filter 110 for transmitting reception target signal light from wavelength multiplexed signal light; a light source 160 for outputting local light; a 90 degree hybrid circuit 131 for outputting interference signal light by interfering the local light outputted from the light source 160 and signal light transmitted through the optical filter; a conversion unit for converting the interference signal light to an electrical data signal; a spectrum detection unit for detecting a frequency spectrum of the data signal based on the data signal; and a control unit 150 for controlling the center frequency of a transmission band of the optical filter based on the shape of the frequency spectrum.SELECTED DRAWING: Figure 1 【課題】信号光の信号品質低下を抑制する光受信装置を提供する。【解決手段】光受信装置100は、波長多重信号光から受信対象の信号光を透過する波長可変光フィルタ110と、局発光を出力する光源160と、光源160から出力された局発光と光フィルタを透過した信号光とを干渉させて干渉信号光を出力する90度ハイブリッド回路131と、干渉信号光を電気的なデータ信号に変換する変換部と、データ信号に基づいて、データ信号の周波数スペクトルを検出するスペクトル検出部と、周波数スペクトルの形状に基づいて、光フィルタの透過帯域の中心周波数を制御する制御部150と、を有する。【選択図】図1