Department of Electrical Engineering, University of Southern California, Los Angeles, California 90089, USA.
Opt Lett. 2011 Aug 15;36(16):3215-7. doi: 10.1364/OL.36.003215.
We experimentally demonstrate a chromatic dispersion insensitive monitoring technique for monitoring of polarization mode dispersion and time misalignment in a 80 Gbit/s polarization-multiplexed return-to-zero differential phase-shift-keying (Pol-MUX RZ-DPSK) signal using a polarimeter and degree-of polarization (DOP) measurements. This technique is modulation format independent (i.e., applicable to both the phase- and amplitude-modulated data) and capable of measuring the fast change of polarization effects caused by vibration or other fast disturbances in the fiber link. We show that the monitored DOP of this signal decreases by 10.8% with differential group delay of 0-12 ps and decreases by 20% with a maximum misalignment of 12.5 ps between two orthogonally polarized RZ-DPSK channels. These measurements are less sensitive to chromatic dispersion of 0-400 ps/nm.
我们实验演示了一种用于监测偏振模色散和时间失配的色度色散不敏感监测技术，该技术使用偏振计和偏振度（DOP）测量对 80Gbit/s 偏振复用归零差分相移键控（Pol-MUX RZ-DPSK）信号进行监测。该技术与调制格式无关（即适用于相位和幅度调制数据），并且能够测量光纤链路中振动或其他快速干扰引起的偏振效应的快速变化。我们表明，随着差分群延迟从 0 到 12ps 的变化，该信号的监测 DOP 降低了 10.8%，随着两个正交偏振 RZ-DPSK 信道之间最大失配为 12.5ps，DOP 降低了 20%。这些测量对 0-400ps/nm 的色度色散不敏感。
