Time and frequency transfer in an asynchronous TCP/IP over SDH-network utilizing passive listening

Emardson, Ragne; Hedekvist, Per Olof; Nilsson, M.; Ebenhag, Sven-Christian; Jaldehag, Kenneth; Jarlemark, Per; Johansson, Jan M.; Pendrill, Leslie; Rieck, Carsten; Lothberg, P.; Nilsson, Hans‐Erik

doi:10.1109/freq.2005.1574054

Cited by 6 publications

(1 citation statement)

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“…In the literature, some variety of implementations of such systems may be found. Among them are the attempts to exploit the standard telecommunication infrastructure for dissemination of time/frequency reference signals [22][23][24][25][26][27]. Concerning the uncertainty of time transfer of such links, it depends on the technique used and the length of the connection; reported values range from 300 ps at 5 km [27] to several ns at 175 km [23].…”

Section: Introductionmentioning

confidence: 99%

Optical fibers in time and frequency transfer

Śliwczyński¹,

Krehlik²,

Lipiński³

2010

Meas. Sci. Technol.

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In the paper we analyze the fundamental accuracy limits of the time/frequency transfer in fiber-optic transmission systems based on intensity modulation and direct detection (IM-DD) of the light signal. The unidirectional and bidirectional time/frequency transfer schemes are considered, and their main limitations are pointed out. In particular, the impact of the fiber backscattering and the temperature dependence of the chromatic dispersion are examined in the context of bidirectional transfer. Finally, experimental results are presented and related to the preceding considerations. The experiments performed with a 60 km long fiber demonstrate single-picosecond accuracy of the time transfer. Our measurements suggest that it should be possible to obtain better accuracy of time/frequency transfer than that reported in the literature for systems based on the IM-DD principle.

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