An Tran

An Tran is a Senior Scientist working in the Time and Frequency department. He obtained a PhD degree from Université Sorbonne Paris Nord in 2019. His PhD thesis focussed on the development of ultra-high resolution molecular spectrometers using ultra-stable and SI-traceable quantum cascaded lasers in the mid-infrared domain. He spent two years doing a postdoc at the Department of Chemistry, University of Oxford, developing ultra-sensitive continuous-wave cavity-enhanced polarimetry for optical rotation measurement of chiral molecules. 

He joined the Optical Frequency Metrology group at NPL in January 2022. His current research focuses on optically steered time scale generation using the NPL state-of-the-art optical atomic clocks; ultralow-noise microwave synthesis from ultra-stable optical references; laser frequency stabilisation; and development of optical frequency combs for compact optical clocks and other applications. 

Areas of Interest

• Development of optical frequency combs and applications
• Ultra-low phase noise microwave generation from ultra-stable lasers 
• Optically steered time scale generation using optical atomic clocks, toward a redefinition of the SI-second 
• Characterisation of radiofrequency and microwave sources and relevant electronic components 
• Ultra-high precision spectroscopy of polyatomic molecules  

Key of publications

• Near-to mid-IR spectral purity transfer with a tunable frequency comb: Methanol frequency metrology over a 1.4 GHz span 
  D. B. A. Tran, O. Lopez, M. Manceau, A. Goncharov, M. Abgrall, H. Alvarez-Martinez, R. Le Targat, E. Cantin, P.-E. Pottie, A. Amy-Klein, B. Darquié 
  APL Photonics 9, 030801 (2024) 
• Continuous-wave cavity ringdown for high-sensitivity polarimetry and magnetometry measurements 
  D. B. A. Tran, E. G. P. Edwards, D. P. Tew, R. Peverall, G. A. D. Ritchie 
  The Journal of Chemical Physics 160, 054201 (2024) 
• Optically steered time scale generation at OP and NPL and remote comparisons 
  M. Abgrall, B. Chupin, P. Uhrich, L. Lorini, R. Le Targat, B. Pointard, J. Lodewyck, J. Tunesi, D. B. A. Tran, A. O. Parsons, A. Tofful, B. I. Robertson, M. Y. H. Johnson, C.-H. Feng, M. Schioppo, E. A. Curtis, I. R. Hill, R. M. Godun, H. S. Margolis 
  Journal of Physics: Conference Series 2889, 012024 (2024) 
• Continuous-wave cavity-enhanced polarimetry for optical rotation measurement of chiral molecules 
  D. B. A. Tran, K. M. Manfred, R. Peverall, G. A. D. Ritchie 
  Analytical Chemistry 93, 5403–5411 (2021) 

LinkedIn

Google Scholar

Email An Tran