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Large-scale timing synchronization based on linear-optics timing detectors
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DOI：10.1017/hpl.2025.30.png)
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Abstract
En 中文
We presented an attosecond-precision timing detector based on linear optics. The minimum measurement floor is 1x10-10 fs2/Hz with only 1 mW input optical power. With this novel technique, the residual dispersion of a 5.2 km fiber link is characterized and precisely compensated. Finally, a comprehensive feedback model has been developed to analyze the noise coupling in a long-distance link stabilization system. The simulation results demonstrate an out-of-loop jitter of merely 359 as, integrated at [1 Hz, 1 MHz], at 1 mW input power per photodetector of our timing detector. Remarkably, the system is capable of maintaining sub-femtosecond precision even at optical power levels as low as 240 nW (for a 5.2 km link length), or link lengths as long as 20 km (with 1 mu W optical power), respectively.
Keywords:
dispersion compensation
link stabilization
metrology
timing synchronization
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