학술논문
Ultra-Low Power Time Transfer: 300 Attosecond Synchronization with 300 fW Over 300 km of Air
Document Type
Conference
Author
Source
2023 Joint Conference of the European Frequency and Time Forum and IEEE International Frequency Control Symposium (EFTF/IFCS) Frequency and Time Forum and IEEE International Frequency Control Symposium (EFTF/IFCS), 2023 Joint Conference of the European. :1-2 May, 2023
Subject
Language
ISSN
2327-1949
Abstract
SummaryWe demonstrate free-space time transfer across a 300 km atmospheric link with greater than 100 dB of loss. With received powers of only a few hundred femtowatts we synchronize two optical oscillators to 300 attoseconds and reach a fractional frequency instability of 3.1×10 -19 , all without the use of large telescope apertures or adaptive optics. This work demonstrates a viable path for future time transfer between ground and satellite nodes in a global optical clock network with performance commensurate with state-of-the-art optical clocks and a low power-aperture product design. Work of the US government, not subject to copyright.