Time Synchronization over a Free-Space Optical Communication Channel
Posted on 2018-12-03 - 17:45
Free space optical (FSO) communication channels are typically used to transmit high-speed data between sites over the air. Here we repurpose an FSO digital communication system and use it directly for two-way time transfer. We demonstrate real-time synchronization between two sites over a turbulent air path of 4 km using binary phase modulated CW laser light. Under synchronization, the two sites exhibit a fractional frequency deviation below 10¨¹⁵ and a time deviation below 1 picosecond at one-hour averaging time. Over an 8-hour period the peak to peak wander is 16 ps.
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Khader, isaac; Bergeron, Hugo; Sinclair, Laura; Swann, William; Newbury, Nathan; Deschênes, Jean-Daniel (2018). Time Synchronization over a Free-Space Optical Communication Channel. Optica Publishing Group. Collection. https://doi.org/10.6084/m9.figshare.c.4288802.v1
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AUTHORS (6)
iK
isaac Khader
HB
Hugo Bergeron
LS
Laura Sinclair
WS
William Swann
NN
Nathan Newbury
JD
Jean-Daniel Deschênes