在雙邊帶相位監測方法的基礎上，對系統結構進行了改進，提出了一種用于非歸零碼光纖通信系統累積色散實時監測的新方法，并進行了詳細的理論推導和仿真計算。結果表明，在不對發射機做任何修改的情況下，就可獲得較高精度的監測。在1.55 μm工作波段，10 Gb/s數據的累積色散監測范圍達到±640 ps/nm。
關 鍵 詞 光纖色散; 色散實時監測; 累積色散; 監測音子

Abstract An improved method on the structure of double sideband phase detection in optical fiber communication system with non return to zero data is described for real-time accumulated dispersion monitoring, the theory of this method is deduced and the numerical simulation is presented. The results show that this method achieves quite precise monitoring value without any modification of transmitters. In the 1.55 μm region, the range of accumulated dispersion for 10Gb/s data reaches ± 640 ps/nm.
Key words chromatic dispersion; real-time dispersion monitoring; accumulated dispersion; pilot tone