Phase-Noise Characterization in Stable Optical Frequency Transfer over Free Space and Fiber Link Testbeds

Time and frequency metrology depends on stable oscillators in both radio-frequency and optical domains. With the increased complexity of the highly precise oscillators also came the demand for delivering the oscillators’ harmonic signals between delocalized sites for comparison, aggregation, or othe...

Full description

Saved in:
Bibliographic Details
Published in:Electronics (Basel) 2023-12, Vol.12 (23), p.4870
Main Authors: Barcik, Peter, Hrabina, Jan, Cizek, Martin, Kolka, Zdenek, Skryja, Petr, Pravdova, Lenka, Cip, Ondrej, Hudcova, Lucie, Havlis, Ondrej, Vojtech, Josef
Format: Article
Language:English
Subjects:
Active mirrors
Artificial satellites
Atmospheric turbulence
Clocks & watches
Communication
Design and construction
Equipment and supplies
Fiber optic networks
Fiber optics
Free space optics
Frequency stability
Infrastructure
Lasers
Methods
Optical communication
Optical fibers
Optical frequency
Optics
Oscillators
Oscillators (Electronics)
Signal processing
Telescopes
Test stands
Turbulence
Citations: Items that this one cites
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Time and frequency metrology depends on stable oscillators in both radio-frequency and optical domains. With the increased complexity of the highly precise oscillators also came the demand for delivering the oscillators’ harmonic signals between delocalized sites for comparison, aggregation, or other purposes. Besides the traditional optical fiber networks, free-space optical links present an alternative tool for disseminating stable sources’ output. We present a pilot experiment of phase-coherent optical frequency transfer using a free-space optical link testbed. The experiment performed on a 30 m long link demonstrates the phase-noise parameters in a free-space optical channel under atmospheric turbulence conditions, and it studies the impact of active MEMS mirror stabilization of the received optical wave positioning on the resulting transfer’s performance. Our results indicate that a well-configured MEMS mirror beam stabilization significantly enhances fractional frequency stability, achieving the−14th-order level for integration times over 30 s.
ISSN:2079-9292
2079-9292
DOI:10.3390/electronics12234870