Optical frequency transfers between ISI CAS and CESNET

0498739 - ÚPT 2019 RIV US eng C - Conference Paper (international conference)
Hucl, Václav - Čížek, Martin - Pravdová, Lenka - Hrabina, Jan - Jelínek, Michal - Mikel, Břetislav - Smotlacha, V. - Havliš, O. - Vojtěch, J. - Lazar, Josef - Číp, Ondřej
Optical frequency transfers between ISI CAS and CESNET.
21st Czech-Polish-Slovak Optical Conference on Wave and Quantum Aspects of Contemporary Optics. (Proceedings of SPIE 10976). Bellingham: SPIE, 2018 - (Zemánek, P.), č. článku 1097617. ISBN 9781510626072. ISSN 0277-786X.
[Czech-Polish-Slovak Optical Conference on Wave and Quantum Aspects of Contemporary Optics /21./. Lednice (CZ), 03.09.2018-07.09.2018]
R&D Projects: GA ČR GB14-36681G
Institutional support: RVO:68081731
Keywords : optical frequency transfer * fiber optic link * closed-loop system * measurement
OECD category: Optics (including laser optics and quantum optics)

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.
Permanent Link: http://hdl.handle.net/11104/0291097