Christian Chardonnet

Christian Chardonnet is a Research Director at Université Paris 13 (Sorbonne Paris Nord University), where he works at the Laboratoire de Physique des Lasers (LPL). His research focuses on precision metrology, optical frequency transfer, and fundamental physics measurements. He has maintained an active publication record spanning over two decades, with recent work extending to 2025.

His primary research interests include:

• Frequency metrology and optical frequency transfer
• Laser spectroscopy for precision measurements
• Determination of fundamental constants, particularly the Boltzmann constant
• Optical fiber links for time and frequency dissemination
• Parity violation studies in chiral molecules through high-resolution spectroscopy

Chardonnet's work has significant implications for redefining the International System of Units (SI) and advancing precision measurement science.

Analysis of his publication trends reveals a strong focus on developing ultra-stable optical fiber links for connecting atomic clocks across long distances, with unprecedented stability levels. His research has enabled new possibilities for international clock comparisons, precision spectroscopy, and the determination of fundamental constants. His work spans both theoretical foundations and practical implementations using standard telecommunication infrastructure.

Chardonnet has collaborated extensively with major metrology institutes across Europe, including Observatoire de Paris and Laboratoire National de Métrologie et d'Essais, and has been involved in significant projects like REFIMEVE, France's national fiber network for time and frequency dissemination.

As a researcher with the CNRS (Centre National de la Recherche Scientifique), he has supervised numerous PhD students and postdoctoral researchers, contributing significantly to France's leadership in precision metrology. His technical expertise encompasses femtosecond laser technology, optical frequency combs, high-resolution spectroscopy, and advanced signal stabilization techniques over fiber optic networks.