Free Space Optical Link Phase Noise Measurement

0567988 - ÚPT 2023 RIV US eng C - Conference Paper (international conference)
Hrabina, Jan - Čížek, Martin - Pravdová, Lenka - Číp, Ondřej - Barcík, P. - Kolka, Z. - Skryja, P.
Free Space Optical Link Phase Noise Measurement.
22nd Polish-Slovak-Czech Optical Conference on Wave and Quantum Aspects of Contemporary Optics. Bellingham: SPIE, 2022 - (Masajada, J.; Urbańczyk, W.), Roč. 12502 (2022), č. článku 125020S. Proceedings of SPIE, 12502. ISBN 978-1-5106-6112-7. ISSN 0277-786X. E-ISSN 1996-756X.
[Polish-Slovak-Czech Optical Conference on Wave and Quantum Aspects of Contemporary Optics /22./. Wojanów (PL), 05.09.2022-09.09.2022]
R&D Projects: GA TA ČR(CZ) TN01000008; GA MŠMT(CZ) EF16_026/0008460
Institutional support: RVO:68081731
Keywords : Free space optical link * phase noise * phase-coherent transfer * time * frequency
OECD category: Optics (including laser optics and quantum optics)
https://www.spiedigitallibrary.org/conference-proceedings-of-spie/12502/2664641/Free-space-optical-link-phase-noise-measurement/10.1117/12.2664641.short

Dissemination of precise time and frequencies and its corresponding infrastructure has become a key tool for many scientific and industrial applications (optical clocks comparisons, global navigation and positioning systems, security). Although most of these transfers use optical fibre networks, free-space photonic links represent an essential supplement in cases where the fibres cannot be utilised. This work presents pilot experimental results of free-space optical (FSO) link phase noise measurement, an initial requirement for further intended phase-coherent transfer of precise time and frequency. The measurement setup consists of a 30 m long unidirectional FSO (DUT) supplied by an ultra-narrow 1540 nm fibre laser (locked to the ultra-stable optical cavity), and it is supplemented with parallel phase-noise stabilised optical fibre delivering the reference beam to the beat-note with the signal obtained from the FSO receiver.
Permanent Link: https://hdl.handle.net/11104/0339307