OPTICAL SIGNAL-TO-NOISE RATIO MONITOR AND METHOD OF MEASURING OPTICAL SIGNAL-TO-NOISE RATIO

• Main Authors: YANG JENG-YUAN, ODA SHOICHIRO, OKANO SATORU, AOKI YASUHIKO, OI HIROMI, AKASAKA YOICHI
• Format: Patent
• Language: English; Japanese
• Published: 08.12.2016
• Subjects: ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; TRANSMISSION

PROBLEM TO BE SOLVED: To provide an optical signal-to-noise ratio monitor with a simple configuration capable of reducing measurement error due to polarization dependent loss.SOLUTION: The optical signal-to-noise ratio monitor includes: a measurement section that measures optical signal-to-noise ratio of a polarized wave multiplex light signal in which the state of polarized wave changes as time passes; a selection section that selects an optical signal-to-noise ratio which is larger than an average of plural optical signal-to-noise ratios from plural optical signal-to-noise ratios which are measured by the measurement section at plural measurement points in a specified measurement period of time; and an output section that outputs the optical signal-to-noise ratio selected by the selection section.SELECTED DRAWING: Figure 8 【課題】簡易な構成の光信号対雑音比モニタにおいて偏波依存損失に起因する測定誤差を削減する。【解決手段】光信号対雑音比モニタは、偏波の状態が時間に対して変化する偏波多重光信号の光信号対雑音比を測定する測定部と、指定された測定期間内の複数の測定点において測定部により測定された複数の光信号対雑音比の中から複数の光信号対雑音比の平均よりも大きい光信号対雑音比を選択する選択部と、選択部により選択された光信号対雑音比を出力する出力部と、を有する。【選択図】図８