Title :
High precise time-synchronization based on ultrashort pulse
Author :
Fan Shi ; Shengkang Zhang ; Huaiying Shang ; Hongbo Wang ; Haifeng Wang ; Hang Yi ; Zhenggang Ding ; Feng Nian ; Keming Feng
Author_Institution :
Sci. & Technol. on Metrol. & Calibration Lab., Beijing Inst. of Radio Metrol. & Meas., Beijing, China
Abstract :
We describe the idea of a high precise time-synchronization based on ultra-short pulse using auto-correlation method. The local pulse train is generated by a femtosecond laser system tightly locked to a local atomic clock. Then the optical pulse train is distributed to remote location. The backward propagating pulses and local pulses are combined and applied to the second-harmonic generation (SHG) crystal auto-correlator which is used for precise time delay measurements. The time compensation block is constructed by an optical delay line. We have measured calibration curve of the system. The time synchronization measurement is 10fs precision.
Keywords :
atomic clocks; calibration; compensation; optical correlation; optical delay lines; optical harmonic generation; synchronisation; time measurement; SHG crystal autocorrelation method; atomic clock; backward pulse propagation; calibration curve; femtosecond laser system; optical delay line; precise time delay synchronization measurement; second-harmonic generation crystal autocorrelation method; time 10 fs; time compensation block; ultrashort optical pulse train generation; Delay effects; Free electron lasers; Laser theory; Measurement by laser beam; Synchronization; Ultrafast optics; auto-correlation method; time-synchronization; ultra-short pulse;
Conference_Titel :
Frequency Control Symposium & the European Frequency and Time Forum (FCS), 2015 Joint Conference of the IEEE International
Conference_Location :
Denver, CO
Print_ISBN :
978-1-4799-8865-5
DOI :
10.1109/FCS.2015.7138843
