Hybrid fiber links for accurate optical frequency comparisons
Abstract
We present the first experimental demonstration over a 43-km-long urban fiber network of a local two-way optical frequency comparison, which does not require any synchronization of the measurements. It was combined with a regular active-noise compensation on another parallel fiber leading to a very reliable and robust frequency transfer. This hybrid scheme enables us to investigate the major limiting factors of the local two-way comparison. We analyze the contribution to the phase noise of the recovered signal by the interferometers at local and remote places. By using the ability of this set up to be injected by a single laser or two independent lasers, we measure the contribution to the long-term instability by the demodulated laser instabilities. We show that a fractional frequency instability level of at 10 000 s can be obtained with this simple setup after 43-km-long propagation in an urban area.
Keywords
Cite
@article{arxiv.1702.01687,
title = {Hybrid fiber links for accurate optical frequency comparisons},
author = {Won-Kyu Lee and Fabio Stefani and Anthony Bercy and Olivier Lopez and Anne Amy-Klein and Paul-Eric Pottie},
journal= {arXiv preprint arXiv:1702.01687},
year = {2017}
}