Real like transmission lines for sagnac correction study

Šlapák, Martin; Vojtěch, Josef

doi:10.1109/eftf.2018.8409054

Cited by 2 publications

(1 citation statement)

References 5 publications

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“…In the existing time-frequency synchronization scheme, satellite timing has become the primary way with the advantages of a wide range and flexible access, but it has obvious security risks because of the weak signal, which is easy to interfere with. For the sake of national defense security, the US Department of Defense began to plan the construction of national integrated Positioning, Navigation, and Timing (PNT) in 2010 [10][11][12]. It would develop various timing methods for cooperation to make up for the defects of any single system and make PNT more perfect [13,14].…”

Section: Introductionmentioning

confidence: 99%

Long-Distance Time Transfer in Optical Fiber Networks Using a Cascaded Taming Technology

Chen

Liang

et al. 2021

Mathematical Problems in Engineering

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In order to meet the time service needs of high-precision, long-distance, and multinode optical network, this paper proposes a new time synchronization solution, which combines the wavelength division multiplexing (WDM) technology with cascaded taming clock technology. The WDM technology is used for time synchronization between each pair of master-slave nodes. In the system, there are two wavelengths on the fiber link between the master node and the slave node for transmitting signals. 1 plus per second (PPS) signal, time code signal, and 10 MHz signal are, respectively, and successively, sent to the optical fiber link. By solving the one-way delay through analysis of error contribution and link characteristics of the time transmission process, time synchronization of the master-slave nodes pair is achieved. Furthermore, the authors adopt cascaded taming clock technology to ensure accurate time synchronization of each node. A 700 km long-distance time-frequency synchronization system is constructed in the laboratory. The system uses a cesium atomic clock as the reference clock source and transmits the signals through 8 small rubidium atomic clocks (RB clocks) hierarchically. Results from the experiment show that the long-term time stability is 47.5 ps/104 s. The system’s structural characteristics and the experiment results meet the requirements to allow practical use of high-precision time synchronization in networks. This proposed solution can be applied in various civil, commercial, and military fields.

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Section: Introductionmentioning

confidence: 99%