二重極化QAM信号のキャリアフリーフェーズ回収は,極化回転推定によって助けられます
Optics express
|February 20, 2026
まとめ
この研究では,複合的な光学信号を強度測定のみを使用して再構築するための新しい二重極化キャリアフリーフェーズ回収 (DP-CF-PR) 受信機を導入しています. この新しい方法は,偏振多複合信号を正確に復元し,エネルギー効率の良い光通信を可能にします.
科学分野:
- 光学通信は,光学通信というものです.
- シグナル処理 信号処理
- 光ファイバー光学は,光ファイバーで作られています.
背景:
- キャリアフリー・フェーズ・リトリーヴ (CF-PR) を用いた偏振多複合QAM信号の復元は,強度測定から正確な転送マトリックス推定の必要性のために困難です.
- 標準のシングルモード・ファイバー (SSMF) ベースのシステムには,クロス・ポラライゼーション・カップリングを扱うための堅牢な方法が必要です.
研究 の 目的:
- 双極化CF-PR (DP-CF-PR) 受信機を提案し,強度検知のみを用いてDP-QAM信号を再構築するために実証.
- クロスポラライゼーションカップリングを緩和し,DP-QAM信号の全フィールド回復を可能にします.
主な方法:
- 繰り返しフィールド再構築とトレーニングシーケンスアシストポラライゼーション回転マトリックス推定の統合.
- 信号を再構築するために,強度検出のみを使用します.
- 80km以上のSSMFで32GBaud DP-QPSK/16QAM信号による実験的検証を行いました.
主要な成果:
- 数値シミュレーションでは,各種のOSNR値と調節形式で0.18rad未満の偏振回転角度と相相差推定誤差が示されています.
- 実験結果は,優れた相復元精度とBER性能を示しています.
- 20%のソフト決定FECの値であるDP-QPSKでは17.4dBのOSNR,16QAMでは27.5dBのOSNRを達成しました.
結論:
- 提案されたDP-CF-PRアーキテクチャは,二重極化光場回復のための実用的で費用対効果の高いソリューションを提供します.
- この技術は,短距離とエネルギー効率の良い光学相互接続の強力な可能性を示している.
- 直接検出ベースのDP-CF-PRは,光学ネットワークにおける強力な信号回復を可能にします.
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