Femtosecond optical two-way time-frequency transfer in the presence of motion

被引：33

作者：

Sinclair, Laura C. ^{[1
]}

Bergeron, Hugo ^{[1
,2
]}

Swann, William C. ^{[1
]}

Khader, Isaac ^{[1
]}

Cossel, Kevin C. ^{[1
]}

Cermak, Michael ^{[1
]}

Newbury, Nathan R. ^{[1
]}

Deschenes, Jean-Daniel ^{[2
]}

机构：

[1] NIST, 325 Broadway St, Boulder, CO 80305 USA

[2] Univ Laval, 2325 Rue Univ, Quebec City, PQ G1V 0A6, Canada

来源：

PHYSICAL REVIEW A | 2019年 / 99卷 / 02期

关键词：

SYNCHRONIZATION; CLOCK;

D O I：

10.1103/PhysRevA.99.023844

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Platform motion poses significant challenges to high-precision optical time and frequency transfer. We give a detailed description of these challenges and their solutions in comb-based optical two-way time and frequency transfer (O-TWTFT). Specifically, we discuss the breakdown in reciprocity due to relativity and due to asynchronous sampling, the impact of optical and electrical dispersion, and velocity-dependent transceiver calibration. We present a detailed derivation of the equations governing comb-based O-TWTFT in the presence of motion. We describe the implementation of real-time signal processing algorithms based on these equations and demonstrate active synchronization of two sites over turbulent air paths to below-1-fs time deviation despite effective velocities of +/- 25 m/s, which is the maximum achievable with our physical setup. With the implementation of the time transfer equation derived here, we find no velocity-dependent bias between the synchronized clocks to within a two-sigma statistical uncertainty of 330 as.

引用

页数：20