The unit of time: Present and future directions

S Bize - Comptes Rendus Physique, 2019 - Elsevier
Some 50 years ago, physicists, and after them the entire world, started to found their time
reference on atomic properties instead of motions of the Earth that have been in use since …

Fiber-optic joint time and frequency transfer with the same wavelength

J Wang, C Yue, Y **, Y Sun, N Cheng, F Yang… - Optics Letters, 2019 - opg.optica.org
Optical fiber links have proven their powerful ability to transfer the ultrastable clock signals
over a national and continental metrological optical network. In this Letter, we propose and …

A 500-km cascaded white rabbit link for high-performance frequency dissemination

N Kaur, F Frank, J Pinto, P Tuckey… - IEEE Transactions on …, 2021 - ieeexplore.ieee.org
We perform experiments exploring the use of white rabbit precision time protocol (WR-PTP)
for time and frequency dissemination over long-distance optical fiber links. We use …

Atmospheric refraction corrections in ground-to-satellite optical time transfer

BK Stuhl - Optics Express, 2021 - opg.optica.org
Free-space optical time and frequency transfer techniques can synchronize fixed ground
stations at the femtosecond level, over distances of tens of kilometers. However, optical time …

Absolute Time Delay Measurement Over an Existing Radio Over Free‐Space Optical Link with Sub‐Picosecond Precision

Z Xu, X Sun, Y Zhang, B Qiu, Y Yang… - Laser & Photonics …, 2023 - Wiley Online Library
Distributed RF systems are referred to as the fundamental structure for future wireless
communication and sensors. To enable wideband coherent operation, synchronization …

Phase demodulation method for stable long-haul frequency transmission based on the Michelson interferometer

Q Liu, H Gao, J Dong, Z Wang, S Yu, B Luo - Optics Letters, 2024 - opg.optica.org
In this Letter, we present a fiber-optic radio frequency (RF) transmission scheme based on
phase modulation with an interferometric detection structure. A self-developed Michelson …

Michelson interferometer based phase demodulation for stable time transfer over 1556 km fiber links

J Lin, Z Wang, Z Lei, J Dong, Y Wang, J Shang… - Optics express, 2021 - opg.optica.org
Time transfer based on phase modulation schemes has attracted extensive attention in
recent years. We propose and experimentally demonstrate an adjustable and stable …

Electro-optic time transfer with femtosecond stability

J Olson, R Rockmore, ND Lemke, S Krzyzewski… - arxiv preprint arxiv …, 2024 - arxiv.org
Optical two-way time and frequency transfer is an enabling technology that has applications
ranging from fundamental investigations of relativity to the operation of global navigation …

[PDF][PDF] 远距离光纤时频信号传递研究进展

谭小容, 许江宁, 吴苗, 何泓洋, 陈丁… - Laser & Optoelectronics …, 2022 - researching.cn
摘要光纤具有损耗低, 稳定性高, 抗干扰能力**等优点, 在远距离, 高精度, 高可靠时频传输系统
建设中起到了突出作用. 梳理了远距离光纤时间频率传输系统实施方案和相关研究成果 …

Modeling of Phase-Modulated Two-Way Time Transfer Fiber-Optic Links

Q Liu, Z Wang, J Dong, J Cheng… - … Frequency and Time …, 2024 - ieeexplore.ieee.org
We demonstrate a model of the signal-to-noise ratio based on a bidirectional time transfer
link, where the signal is phase demodulated by a Michelson interferometer. The primary …