Phase-Noise Characterization in Stable Optical Frequency Transfer over Free Space and Fiber Link Testbeds

0579226 - ÚPT 2024 RIV CH eng J - Journal Article
Barcík, P. - Hrabina, Jan - Čížek, Martin - Kolka, Z. - Skryja, P. - Pravdová, Lenka - Číp, Ondřej - Hudcová, L. - Havliš, O. - Vojtěch, J.
Phase-Noise Characterization in Stable Optical Frequency Transfer over Free Space and Fiber Link Testbeds.
Electronics. Roč. 12, č. 23 (2023), č. článku 4870. E-ISSN 2079-9292
R&D Projects: GA MŠMT(CZ) EF16_026/0008460
EU Projects: European Commission(XE) 22IEM01 - TOCK
Institutional support: RVO:68081731
Keywords : time and frequency metrology * optical frequency transfer * free-space optics * optical fiber link * phase noise * MEMS mirror
OECD category: Optics (including laser optics and quantum optics)
Impact factor: 2.9, year: 2022
Method of publishing: Open access
https://www.mdpi.com/2079-9292/12/23/4870

Time and frequency metrology depends on stable oscillators in both radio-frequency and optical domains. With the increased complexity of the highly precise oscillators also came the demand for delivering the oscillators’ harmonic signals between delocalized sites for comparison, aggregation, or other purposes. Besides the traditional optical fiber networks, free-space optical links present an alternative tool for disseminating stable sources’ output. We present a pilot experiment of phase-coherent optical frequency transfer using a free-space optical link testbed. The experiment performed on a 30 m long link demonstrates the phase-noise parameters in a free-space optical channel under atmospheric turbulence conditions, and it studies the impact of active MEMS mirror stabilization of the received optical wave positioning on the resulting transfer’s performance. Our results indicate that a well-configured MEMS mirror beam stabilization significantly enhances fractional frequency stability, achieving the−14th-order level for integration times over 30 s.
Permanent Link: https://hdl.handle.net/11104/0348078