Pankaj K. Choudhury received a PhD degree in Physics in 1992. During 1992-1997, he was a Research Associate at the Department of Electronics Engineering, Indian Institute of Technology, Banaras Hindu University (Varanasi, India). In 1997, he joined the Department of Physics, Goa University (Goa, India) as a Lecturer. In late 1999, he became a Researcher at the Center of Optics, Photonics and Lasers (COPL), Laval University (Quebec, Canada). During 2000-2003, he was with the Faculty of Engineering, Gunma University (Kiryu, Japan) as a Researcher. In May 2003, he became a Professor at the Faculty of Engineering, Multimedia University (Cyberjaya, Malaysia) where he was until the late 2009. During the span, he also served the Telekom Research and Development (TMR&D, Malaysia) as a consultant for projects on optical devices. In late 2009, he became a Professor at the Institute of Microengineering and Nanoelectronics (IMEN), Universiti Kebangsaan Malaysia (The National University of Malaysia, Bangi, Malaysia), where he was attached until mid 2022. He is now a Professor at the College of Optical Science and Engineering, International Research Center for Advanced Photonics, Zhejiang University (China). His current research interests lie in the theory of optical waveguides, which include complex mediums, fiber and integrated optics, fiber optic devices, optical sensors and metamaterials. He has published over 285 research papers in peer-reviewed international journals and conference proceedings; contributed chapters to 29 research level books; edited and co-edited 12 research level books in these areas. He is the reviewer for over 50 research journals, and the Editor-in-Chief of the Journal of Electromagnetic Waves and Applications (Taylor & Francis, UK). He is a Fellow of IET (UK) and SPIE (USA), and a Senior Member of IEEE and Optica. He is a Traveling Lecturer of Optica. Apart from these, he is a Chartered Engineer (C.Eng.) registered with the Engineering Council (UK).