Prof. Dr. Chuen-Lin Tien is a Distinguished Professor at the Department of Electrical Engineering, Feng Chia University, Taichung, Taiwan. He earned his Ph.D. in Optical Sciences from National Central University in 2000. From 1987 to 2004, he worked as a Senior Researcher at the Chung Shan Institute of Science and Technology. His expertise lies in optical system design, thin-film residual stress, optical metrology, D-shaped fiber-optic sensors, and optical thin film devices. His research interests include optical metrology, optical thin films, fiber sensors, and optical  design.