23 June 2014 Precise verification of a fibre link for frequency transfer
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Proceedings Volume 9257, Sensors, MEMS and Electro-Optical Systems; 92570H (2014) https://doi.org/10.1117/12.2064955
Event: Third Conference on Sensors, MEMS and Electro-Optic Systems, 2014, Skukuza, Kruger National Park, South Africa
Abstract
A new electrically insensitive optical fibre link was installed between two buildings using commercially available equipment. The aim of the link was to transfer the frequency accuracy from the South African National Measure- ment Standard for Time and Frequency (derived from caesium atomic clocks) to an optical frequency comb. This enables direct traceability of optical frequency measurements to internationally verified time standards (UTC), via the timing links at the National Metrology Institute of South Africa (NMISA). A clean-up oscillator is used to improve any degrading of the stability caused by the laser link. Highly precise loop-back experiments were done to verify the accuracy and stability of the fibre link and clean-up oscillator combination. The nature and results of such experiments are presented here, in order to demonstrate the traceability of the fibre link, and therefore the traceable link between the optical frequency comb and the National Measurement Standards for Time and Frequency of South Africa.
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C. F. Matthee, J. P. Burger, R. Kritzinger, "Precise verification of a fibre link for frequency transfer", Proc. SPIE 9257, Sensors, MEMS and Electro-Optical Systems, 92570H (23 June 2014); doi: 10.1117/12.2064955; https://doi.org/10.1117/12.2064955
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