Prof. Jin U. Kang
The Johns Hopkins University

A single-arm interferometer based optical coherence tomography (OCT) system known as common-path OCT (CPOCT) is rapidly progressing towards practical applications. Due in part to the simplicity and robustness of its design, Fourier Domain CPOCT (FD-CP-OCT) is being adopted for many endoscopic sensing and imaging applications. FD-CP-OCT uses simple, interchangeable fiber optic probes that are easily integrated into small and delicate surgical tools. The system is capable of providing not only high resolution imaging but also optical sensing. Here, we report progress towards practical applications of FD-CP-OCT in the setting of delicate microsurgical procedures such as intraocular retinal surgery. To meet the challenges presented by the microsurgical requirements of these procedures, we have developed and initiated the validation of applicable fiber optic probes. By integrating these probes into our developing imaging system, we have obtained high resolution OCT images and have also completed a demonstration of their potential sensing capabilities. Specifically, we utilize multiple SLEDs to demonstrate sub 3-micron axial resolution in water; we propose a technique to quantitatively evaluate the spatial distribution of oxygen saturation levels in tissue; and we present evidence supportive of the technology’s surface sensing and tool guidance potential by demonstrating topological and motion compensation capabilities. The fundamentals of OCT will also be reviewed to accommodate audience from a broad spectrum.

Jin U. Kang is a Professor and Chair of the Department of Electrical and Computer Engineering, The Johns Hopkins University, Baltimore, MD. He joined the department as an assistant professor in 1998. Previously, he was a Research Engineer with the U.S. Naval Research Laboratory, Washington, DC. He received the Ph.D. degree in electrical engineering and optical sciences from the University of Central Florida in 1996. His current research interests include fiber optic sensors and imaging systems, novel fiber laser systems, and bio-photonics.