Cascaded multiplexed optical link on a telecommunication network for frequency dissemination

Abstract

We demonstrate a cascaded optical link for ultrastable frequency dissemination comprised of two compensated links of 150 km and a repeater station. Each link includes 114 km of Internet fiber simultaneously carrying data traffic through a dense wavelength division multiplexing technology, and passes through two routing centers of the telecommunication network. The optical reference signal is inserted in and extracted from the communication network using bidirectional optical add-drop multiplexers. The repeater station operates autonomously ensuring noise compensation on the two links and the ultra-stable signal optical regeneration. The compensated link shows a fractional frequency instability of 3 \times 10-15 at one second measurement time and 5 \times 10-20 at 20 hours. This work paves the way to a wide dissemination of ultra-stable optical clock signals between distant laboratories via the Internet network.

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Cited by in corpus (20)

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• Cascaded optical fiber link using the Internet network for remote clocks comparison
• Tackling the Limits of Optical Fiber Links
• In-line extraction of an ultra-stable frequency signal over an optical fiber link
• First industrial-grade coherent fiber link for optical frequency standard dissemination
• Joint time and frequency dissemination network over delay-stabilized fiber optic links
• The Mid-Frequency Square Kilometre Array Phase Synchronisation System
• Studying fundamental limit of optical fiber links to $10^{-21}$ level
• Combining fiber Brillouin amplification with a repeater laser station for fiber-based optical frequency dissemination over 1400 km
• Ultra-stable optical frequency dissemination on a multi-access fibre network
• Phase Noise in Real-World Twin-Field Quantum Key Distribution
• Two-Branch Fiber Link for International Clock Networks
• Embedded digital phase noise analyzer for optical frequency metrology
• Passive Optical Phase Stabilization on a Ring Fiber Network
• Enhanced phase noise reduction in localized two-way optical frequency comparison
• A plug-and-play solution for characterizing two-way optical frequency transfer over free-space
• E-21 Level Instability Frequency Dissemination over 2067 km noisy Telecommunication Infrastructure