Electrical Regeneration for Long-Haul Fiber-Optic Time and Frequency Distribution Systems
| Autor: | L. Buczek, Przemyslaw Krehlik, Lukasz Sliwczynski |
|---|---|
| Rok vydání: | 2021 |
| Předmět: |
Optical amplifier
Physics Optical fiber Time and frequency transfer fiber optics optical-electrical-optical regeneration Acoustics and Ultrasonics Amplifier Attenuation Physics::Optics 01 natural sciences Signal Time and frequency transfer law.invention Signal-to-noise ratio law 0103 physical sciences Phase noise Electronic engineering Electrical and Electronic Engineering 010301 acoustics Instrumentation |
| Zdroj: | IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control. 68:899-906 |
| ISSN: | 1525-8955 0885-3010 |
| DOI: | 10.1109/tuffc.2020.3016610 |
| Popis: | In recent years fiber-optic based long-haul installations for time and frequency (T&F) distribution have become operational at various sites. The common practice to cope with large attenuation of long fiber path is to use bidirectional optical amplifiers. This, however, becomes insufficient in case of very long links and/or long spans between amplifiers, because of unavoidable deterioration of the signal-to-noise ratio (SNR). In this paper we present a solution where the optical signal amplification is combined with optical-electrical-optical (OEO) regeneration, performed in a few points along the link. We analyze the impact of replacing some optical amplifiers with OEOs and demonstrate the resulting improvement in terms of SNR of the received optical signal and the phase noise at the output of the T&F distribution system. Laboratory experiments performed with both spooled and metropolitan-area fibers (total length up to 900km) confirmed the theoretical predictions and showed that placing the OEO regenerators in appropriate points along the link allows reaching the required SNR. |
| Databáze: | OpenAIRE |
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