WDM-Based Fiber-Optic Time Synchronization Without Requiring Link Calibration

WDM-Based Fiber-Optic Time Synchronization Without Requiring Link Calibration

Blog Article

In this paper, we propose a fiber-optic time synchronization technique based on the arcade smokey the bear belt bidirectional wavelength division multiplexing (WDM) transmission over a fiber link.The effect of fiber dispersion on the uncertainty of the system is effectively suppressed by properly allocating the forward and backward wavelength maps.Thus, only an initial easy-to-implement calibration in a back-to-back configuration instead of multiple complicated link calibrations is required.To compensate the propagation delay fluctuations, a large-dynamic-range time pre-compensator with high precision is implemented at the local site, enabling a time signal at the remote site is accurately synchronized with the clock at the local site.Our experiments demonstrate that stabilities in terms of time deviation (TDEV) of less than 29.

8 ps at 1s and 5.2 ps at dea eyewear 104s and the clock difference of less than 28 ps can be achieved for the fiber link up to 200 km.