Recent Advances in Optical Coherence Tomography

Dear Colleagues,

Optical coherence tomography (OCT) is an important interferometric technique that has experienced fast development in the last thirty years, with its origins in white-light interferometry. In OCT, the properties of low-coherence light are exploited to obtain absolute measurements of optical distances, allowing the performance of nondestructive tomography of scattering media or surfaces with micrometric resolutions.

The capability of obtaining high-quality three-dimensional images non-intrusively has stimulated great research interest, which was initially focused on OCT in biomedical applications. Indeed, the possibility of diagnosis based on the analysis of in vivo tissue is of particularly interest, for example, in ophthalmology, cardiology, and dermatology. Nevertheless, OCT is also showing widespread potential in other branches. For example, in the last decade, its use has been demonstrated in numerous laser processing technologies, where low-coherence interferometry can be used for real-time and noncontact process monitoring.

Such a variety of applications serves as inspiration for the research and development of new OCT techniques to improve measurement performance in terms of robustness, speed, and resolution. Accordingly, OCT has been implemented following several time-domain and frequency-domain interferometric techniques. Another important direction of research consists of the development of techniques and devices that support the progress of novel OCT systems, including laser scanners, modulators, adaptive optics, and handheld probes.

This Special Issue of Photonics will focus on the recent advances in low-coherence interferometry techniques and the optimization of OCT performance in addition to its novel applications either in biomedical or other technological fields.

Dr. Simone Donadello
Prof. Dr. Virgil-Florin Duma
Dr. Chao Zhou
Guest Editors

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