Personal profile
Expertise related to UN Sustainable Development Goals
In 2015, UN member states agreed to 17 global Sustainable Development Goals (SDGs) to end poverty, protect the planet and ensure prosperity for all. This person’s work contributes towards the following SDG(s):
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SDG 9 Industry, Innovation, and Infrastructure
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Collaborations and top research areas from the last five years
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HIOC: High-accuracy ion-based optical clocks
Lindvall, T. (Manager) & Wallin, A. (Participant)
1/05/24 → 30/04/27
Project: EU project
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TOCK: Transportable optical clocks for key comparisons
Lindvall, T. (Manager), Wallin, A. (Participant), Hanhijärvi, K. (Participant) & Fordell, T. (Participant)
EURAMET e.V. - European Partnership on Metrology
1/05/23 → 30/04/26
Project: EU project
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NaQCI.fi: National Quantum Communication Infrastructure in Finland
Seppänen, K. (PI), Ahola, K. (Participant), Cherchi, M. (Participant), Fordell, T. (Participant), Thomas, G. (Participant), Hanhijärvi, K. (Participant), Huusko, J. (Owner), Kalsta, A. (Participant), Koivisto, J. (Participant), Koskela, P. (Participant), Lehtikangas, J. (Participant), Lehtonen, S. (Participant), Lindvall, T. (Participant), Lintulampi, A. (Participant), Manninen, A. (Participant), Muurman, M. (Participant), Nikula, S. (Participant), Nissilä, J. (Participant), Ojakangas, K. (Participant), Ojasalo, K. (Participant), Ollikainen, V. (Participant), Pourjamal, S. (Participant), Puhakainen, P. (Participant), Rantakokko, M. (Participant), Ruponen, S. (Participant) & Wallin, A. (Participant)
1/01/23 → 31/12/25
Project: EU project
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Quantum QKD Demo
Seppänen, K. (PI), Nikula, S. (Participant), Hanhijärvi, K. (Participant), Fordell, T. (Participant), Manninen, A. (Participant), Pourjamal, S. (Participant), Wallin, A. (Participant), Ojasalo, K. (Participant), Koskela, P. (Participant), Lintulampi, A. (Participant) & Ollikainen, V. (Participant)
3/01/22 → 30/12/22
Project: Research
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WRITE: Precision time for industry
Wallin, A. (Manager) & Hanhijärvi, K. (Participant)
1/06/18 → 30/11/21
Project: EU project
Research output
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88Sr+ optical clock with 7.9×10−19 systematic uncertainty and measurement of its absolute frequency with 9.8×10−17 uncertainty
Lindvall, T., Fordell, T., Hanhijärvi, K. J., Doležal, M., Rahm, J., Weyers, S. & Wallin, A. E., 27 Oct 2025, In: Physical Review Applied. 24, 044082.Research output: Contribution to journal › Article › Scientific › peer-review
Open Access6 Link opens in a new tab Citations (Scopus) -
Closed-Loop Polarization Mode Dispersion Mitigation for Fibre-Optic Time and Frequency Transfer
Fordell, T., Wallin, A., Lindvall, T. & Hanhijärvi, K., 15 Mar 2025, In: Optics Letters. 50, 6, p. 1759-1762Research output: Contribution to journal › Article › Scientific › peer-review
Open AccessFile1 Link opens in a new tab Citation (Scopus)66 Downloads (Pure) -
Coordinated international comparisons between optical clocks connected via fiber and satellite links
Lindvall, T., Pizzocaro, M., Godun, R. M., Abgrall, M., Akamatsu, D., Amy-Klein, A., Benkler, E., Bhatt, N. M., Calonico, D., Cantin, E., Cantoni, E., Cerretto, G., Chardonnet, C., Cifuentes Marín, M. A., Clivati, C., Condio, S., Curtis, E. A., Denker, H., Donadello, S. & Dörscher, S. & 40 others, , 2025, In: Optica. 12, 6, p. 843-852Research output: Contribution to journal › Article › Scientific › peer-review
Open Access6 Link opens in a new tab Citations (Scopus) -
First inter-comparison of optical to electrical time delay calibrated photodetectors and calibration setup validation
Jansweijer, P. P. M., Boukadida, N. A. D., Hanhijärvi, K. & Wallin, A., 10 Oct 2025, 2025 IEEE International Symposium on Precision Clock Synchronization for Measurement, Control, and Communication (ISPCS): Proceedings. IEEE Institute of Electrical and Electronic Engineers, 6 p. 11281757Research output: Chapter in Book/Report/Conference proceeding › Conference article in proceedings › Scientific › peer-review
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Guidelines for designs for ultrastable laser with 10−17 fractional frequency instability
Barbarat, J., Benkler, E., Bober, M., Clivati, C., Dickmann, J., Fang, B., Fluhr, C., Fordell, T., Gillot, J., Giordano, V., Gustavsson, D., Hanhijärvi, K., Hartman, M., Herbers, S., Jaros, A., Kawohl, J., Kersale, Y., Kroker, S., Kwong, C. J. & Lacroute, C. & 29 others, , 8 Apr 2025, In: arXiv preprint. 106 p.Research output: Contribution to journal › Article › Scientific
Open Access
Press/Media
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Otaniemessä mitattiin optisen kellon taajuus tarkimmin maailmassa
23/12/25
1 Media contribution
Press/Media: Press / Media
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Kohti uutta sekuntia – Suomessa kehitetään maailman tarkimpia atomikelloja
Wallin, A., Korpelainen, V. & Heinonen, M.
11/07/25
1 Media contribution
Press/Media: Press / Media
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Sekunti pitää määritellä uudelleen, mutta miksi?
20/05/25
1 Media contribution
Press/Media: Press / Media
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Atomikellot pysyvät tarkassa ajassa käytännössä ikuisesti, mutta maapallo ei – lisäsekunneista on syntynyt ongelma, joka pitää ratkaista
13/11/23
1 Media contribution
Press/Media: Press / Media
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Suomen virallista aikaa mittaavista atomikelloista osa on vanhentumassa – ”Tällaisten kellojen valmistajia ei ole maailmassa kovin monta”
6/10/23
1 Media contribution
Press/Media: Press / Media