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Optical frequency transfers between ISI CAS and CESNET
Author(s): Vaclav Hucl; Martin Cizek; Lenka Pravdova; Jan Hrabina; Michal Jelinek; Bretislav Mikel; Vladimir Smotlacha; Ondrej Havlis; Josef Vojtech; Josef Lazar; Ondrej Cip
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Paper Abstract

Optical fiber links in Europe are with growing importance utilized in comparison campaigns of experimental optical clocks to verify their ultimate relative stability. We present a 306 km long optical fiber link established in the Czech Republic between ISI CAS Brno and CESNET Prague. This link will to deliver stable optical frequencies from laser standards located at ISI CAS in Brno to prospective academic and industrial partners in the Prague area. Our contribution reports on the current state of the fiber link for phase-coherent transfer of optical frequency. The long-haul link operates on an internet communication fiber in a dedicated 1540-1546nm DWDM window. A narrow-linewidth laser (Koheras BASIK) working at 1540.5 nm locked to a high-finesse optical cavity (Q = 300 000) serves as the optical frequency standard and source of highly coherent laser light at the transmitting side.

Paper Details

Date Published: 18 December 2018
PDF: 6 pages
Proc. SPIE 10976, 21st Czech-Polish-Slovak Optical Conference on Wave and Quantum Aspects of Contemporary Optics, 1097617 (18 December 2018); doi: 10.1117/12.2518456
Show Author Affiliations
Vaclav Hucl, Institute of Scientific Instruments of the CAS, v.v.i. (Czech Republic)
Martin Cizek, Institute of Scientific Instruments of the CAS, v.v.i. (Czech Republic)
Lenka Pravdova, Institute of Scientific Instruments of the CAS, v.v.i. (Czech Republic)
Jan Hrabina, Institute of Scientific Instruments of the CAS, v.v.i. (Czech Republic)
Michal Jelinek, Institute of Scientific Instruments of the CAS, v.v.i. (Czech Republic)
Bretislav Mikel, Institute of Scientific Instruments of the CAS, v.v.i. (Czech Republic)
Vladimir Smotlacha, CESNET z.s.p.o. (Czech Republic)
Ondrej Havlis, CESNET z.s.p.o. (Czech Republic)
Josef Vojtech, CESNET z.s.p.o. (Czech Republic)
Josef Lazar, Institute of Scientific Instruments of the CAS, v.v.i. (Czech Republic)
Ondrej Cip, Institute of Scientific Instruments of the CAS, v.v.i. (Czech Republic)


Published in SPIE Proceedings Vol. 10976:
21st Czech-Polish-Slovak Optical Conference on Wave and Quantum Aspects of Contemporary Optics
Pavel Zemánek, Editor(s)

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