Dr Choi is a Visiting Researcher to the AOG. He is an Associate Professor at the Faculty of Engineering, Niigata University (http://optlab.eng.niigata-u.ac.jp/index.html)
A publication list can be viewed at http://optlab.eng.niigata-u.ac.jp/publication.html .
Optical coherence tomography
Frequency comb interferometry
Tomographic vibrometry
Polarization sensitive OCT.