Free-space transfer of comb-rooted optical frequencies over an 18 km open-air link

Hyun Jay Kang, Jaewon Yang, Byung Jae Chun, Heesuk Jang, Byung Soo Kim, Young-Jin Kim () and Seung-Woo Kim ()
Additional contact information
Hyun Jay Kang: Korea Advanced Institute of Science and Technology (KAIST), Science Town
Jaewon Yang: Korea Advanced Institute of Science and Technology (KAIST), Science Town
Byung Jae Chun: Korea Advanced Institute of Science and Technology (KAIST), Science Town
Heesuk Jang: Korea Advanced Institute of Science and Technology (KAIST), Science Town
Byung Soo Kim: Korea Advanced Institute of Science and Technology (KAIST), Science Town
Young-Jin Kim: Korea Advanced Institute of Science and Technology (KAIST), Science Town
Seung-Woo Kim: Korea Advanced Institute of Science and Technology (KAIST), Science Town

Nature Communications, 2019, vol. 10, issue 1, 1-8

Abstract: Abstract Phase-coherent transfer of optical frequencies over a long distance is required for diverse photonic applications, including optical clock dissemination and physical constants measurement. Several demonstrations were made successfully over fiber networks, but not much work has been done yet through the open air where atmospheric turbulence prevails. Here, we use an 18 km outdoor link to transmit multiple optical carriers extracted directly from a frequency comb of a 4.2 THz spectral width. In stabilization to a high-finesse cavity with a 1.5 Hz linewidth, the comb-rooted optical carriers are simultaneously transferred with collective suppression of atmospheric phase noise to −80 dBc Hz−1. Microwaves are also delivered by pairing two separate optical carriers bound with inter-comb-mode coherence, for example a 10 GHz signal with phase noise of −105 dBc Hz−1 at 1 Hz offset. Lastly, an add-on demonstration is given for multi-channel coherent optical communications with the potential of multi-Tbps data transmission in free space.

Date: 2019
References: Add references at CitEc
Citations:

Downloads: (external link)
https://www.nature.com/articles/s41467-019-12443-8 Abstract (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:nat:natcom:v:10:y:2019:i:1:d:10.1038_s41467-019-12443-8

Ordering information: This journal article can be ordered from
https://www.nature.com/ncomms/

DOI: 10.1038/s41467-019-12443-8

Access Statistics for this article

Nature Communications is currently edited by Nathalie Le Bot, Enda Bergin and Fiona Gillespie

More articles in Nature Communications from Nature
Bibliographic data for series maintained by Sonal Shukla () and Springer Nature Abstracting and Indexing ().