Photonic services, their enablers and applications

Vojtěch, Josef; Smotlacha, Vladimír; Škoda, Pavel; Kuna, Alexander; Hůla, Miloslav; Šíma, Stanislav

doi:10.1117/12.929908

Cited by 17 publications

(12 citation statements)

References 6 publications

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“…8,11 The total line length of TF transmissions within the CESNET's network is about 1683 km and roughly 67% of the infrastructure length (1137 km) is in operation, as is shown in Fig. 1.…”

Section: Infrastructurementioning

confidence: 97%

“…(8). It takes into account the relativistic effects caused by the Earth's rotation and gravitational potential.…”

Section: Relativistic Effectsmentioning

confidence: 99%

“…The two-way time transfer is based on proprietary time transfer adapters (TTAs), which have been designed using a field programmable gate array; for more details, see Ref. 8. TTAs are capable of operating in heterogeneous environments, including multimode fibers, singlemode dedicated fibers, telecom lambdas, and passive channels within other WDM systems.…”

Section: Infrastructurementioning

confidence: 99%

“…Recent works aiming to overcome large distances are oriented toward fiber transmission, where a number of projects are using dedicated fibers 2,3 or fibers shared with data transmissions. 4,[6][7][8][9][10] A stable propagation delay in fiber is a crucial parameter for stable and accurate transmissions, but, in addition, optical fibers are influenced by environmental changes around the optical infrastructure. These include not only temperature changes but also mechanical disturbance and acoustic vibrations.…”

Section: Introductionmentioning

confidence: 99%

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Joint accurate time and stable frequency distribution infrastructure sharing fiber footprint with research network

et al. 2017

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Abstract. The infrastructure essentialities for accurate time and stable frequency distribution are presented. Our solution is based on sharing fibers for a research and educational network carrying live data traffic with time and frequency transfer in parallel. Accurate time and stable frequency transmission uses mainly dark channels amplified by dedicated bidirectional amplifiers with the same propagation path for both directions of transmission. This paper targets challenges related to bidirectional transmission, particularly, directional nonreciprocities. © The Authors. Published by SPIE under a Creative Commons Attribution 3.0 Unported License. Distribution or reproduction of this work in whole or in part requires full attribution of the original publication, including its DOI.

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“…8,11 The total line length of TF transmissions within the CESNET's network is about 1683 km and roughly 67% of the infrastructure length (1137 km) is in operation, as is shown in Fig. 1.…”

Section: Infrastructurementioning

confidence: 97%

“…(8). It takes into account the relativistic effects caused by the Earth's rotation and gravitational potential.…”

Section: Relativistic Effectsmentioning

confidence: 99%

Section: Infrastructurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Joint accurate time and stable frequency distribution infrastructure sharing fiber footprint with research network

et al. 2017

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“…National research and educational network (NREN) are pioneers of new developments in rather unexplored areas of research networking and special requirements for new applications were collected and described for example in [1] and [2].…”

Section: Introductionmentioning

confidence: 99%

Photonic applications and their coexistence with standard data transmissions

Radil¹,

z.s.p.o.²,

Horváth³

et al. 2018

Instrumentation Engineering, Electronics and Telecommunications

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Fibre networks are rather common today almost in many parts of the world and it looks that fibre as the transmission medium is here to stay for some time. Data transmissions in the backbone fibre networks are based on coherent detection principles and use multilevel phase modulations like quadrature phase shift keying used for 100 Gb/s transmission speeds. But there are also new photonic applications with different requirements then raw speeds only. In order to guarantee seamless coexistence of standard and new photonic applications, we evaluate numerical simulations by using commercially available simulation tools. The simulations results show that such coexistence is possible when certain rules are followed. Simulation results are verified on real fibres to ensure reliable operation.

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