Educated in Denmark and Finland, she works in Finland as senior university lecturer in the Aalto University Department of Electronics and Nanoengineering.
Ludvigsen earned a bachelor's degree in natural sciences from Aarhus University.
She came to the Helsinki University of Technology (now part of Aalto University) for graduate study in engineering and technology, earning a licenciate in 1990 and completing her PhD in 1994.
[1] Her dissertation was Diodilasereiden taajuuden stabilointi optisen mittaustekniikan sovelluksiin [Frequency stabilization of diode lasers for applications in optical measurement technology].
[2] Optica named her as a 2024 Optica Fellow, "for outstanding contributions to the field of photonic crystal fibers and optical sensors".