Stabilization of the Propagation Delay in Fiber Optics in a Frequency Distribution Link Using Electronic Delay Lines: First Measurement Results

Albin Czubla , Lukasz Sliwczynski, Przemyslaw Krehlik, Lukasz Buczek, Marcin Lipinski, and Jerzy Nawrocki

Abstract:	In this paper, we present measurement results of the Digital Locked Loop system, developed by AGH University of Science and Technology, for microwave frequency distribution (here, 5 or 10 MHz) over optical fiber with precise stabilization of propagation delay in a relatively wide range of temperature variations. The main principle of the operation of the electronic delay lines is explained and the first measurement results obtained with the experimental setup using 20 km of optic fiber link are discussed. The stability of frequency transfer at the level of 2x10^-17 (the Allan deviation) for about a 24-hour averaging time was achieved, with the stability of propagation delay at a level below 15 ps (peak-to-peak). Such systems are a very good prospect for the evolution of atomic clock comparison and precise time and frequency transfer.
Published in:	Proceedings of the 42nd Annual Precise Time and Time Interval Systems and Applications Meeting November 15 - 18, 2010 Hyatt Regency Reston Town Center Reston, Virginia
Pages:	389 - 396
Cite this article:	Czubla, Albin, Sliwczynski, Lukasz, Krehlik, Przemyslaw, Buczek, Lukasz, Lipinski, Marcin, Nawrocki, Jerzy, "Stabilization of the Propagation Delay in Fiber Optics in a Frequency Distribution Link Using Electronic Delay Lines: First Measurement Results," Proceedings of the 42nd Annual Precise Time and Time Interval Systems and Applications Meeting, Reston, Virginia, November 2010, pp. 389-396.
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