Publication Date:
2018-04-04
Description:
Author(s): D. Herman, S. Droste, E. Baumann, J. Roslund, D. Churin, A. Cingoz, J.-D. Deschênes, I. H. Khader, W. C. Swann, C. Nelson, N. R. Newbury, and I. Coddington Using an optical frequency comb to directly convert a frequency reference to a useable time output will enable tight synchronization of tomorrow’s optical-clock networks. Previous frequency-comb systems experienced cycle slips too often to provide true optical timescales. This study combines innovative fiber-comb designs, digital phase locking, and precise phase-determination methods to demonstrate optical clockwork with no phase slips for over a m o n t h . Fault-free timekeeping at the femtosecond level over months is a vital step in supplanting the current microwave time standard with an optical standard, and could improve e . g . gravitational geodesy and GPS technology. [Phys. Rev. Applied 9, 044002] Published Tue Apr 03, 2018
Electronic ISSN:
2331-7019
Topics:
Physics
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