Free space optical link phase noise measurement

Jan Hrabina; Martin Čížek; Lenka Pravdová; Ondřej Číp; Peter Barcík; Zdeněk Kolka; Petr Skryja

doi:10.1117/12.2664641

12 December 2022 Free space optical link phase noise measurement

Jan Hrabina, Martin Čížek, Lenka Pravdová, Ondřej Číp, Peter Barcík, Zdeněk Kolka, Petr Skryja

Proceedings Volume 12502, 22nd Polish-Slovak-Czech Optical Conference on Wave and Quantum Aspects of Contemporary Optics; 125020S (2022) https://doi.org/10.1117/12.2664641
Event: 22nd Polish-Slovak-Czech Optical Conference on Wave and Quantum Aspects of Contemporary Optics, 2022, Wojanow, Poland

Abstract

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.

Citation Download Citation

Jan Hrabina, Martin Čížek, Lenka Pravdová, Ondřej Číp, Peter Barcík, Zdeněk Kolka, and Petr Skryja "Free space optical link phase noise measurement", Proc. SPIE 12502, 22nd Polish-Slovak-Czech Optical Conference on Wave and Quantum Aspects of Contemporary Optics, 125020S (12 December 2022); https://doi.org/10.1117/12.2664641

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KEYWORDS

Free space optics

Phase measurement

Optical fibers

Free space

Interference (communication)

Navigation systems

Networks

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