Patent · US Active

Two-way optical time transfer using a photonic chip

US11387914B2 · kind B2 · utility

1Cited by

1References

21Claims

0Family size

Assignee

Vector Atomic, Inc. · US

Inventors

Arman Cingoz · Sunnyvale, US
Abijith Sudarsan Kowligy · Livermore, US
Jonathan David Roslund · Pleasanton, US

Key dates

Filing date	Aug 4, 2020
Grant date	Jul 12, 2022
Priority date	—
Expiry date	Jan 18, 2041

Classification

Technology area (CPC H)Electricity
CPC primaryH04B10/118
WIPO fieldTelecommunications
WIPO sectorElectrical engineering

Abstract

Embodiments herein describe sub-picosecond accurate two-way clock synchronization by optically combining received optical pulses with optical pulses generated locally in a photonic chip before the optical signals are then detected by a photodetector to obtain an interference measurement. That is, the optical pulses can be combined to result in different interference measurements. Optically combining the pulses in the photonic chip avoids much of the jitter introduced by the electronics. Further, the sites can obtain multiple interference measurements which can be evaluated to accurately determine when the optical pulses arrive at the site with femtosecond accuracy.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.