Multimode fiber enables control of spatial coherence in Fourier-domain full-field optical coherence tomography for in vivo corneal imaging
Egidijus Auksorius, Dawid Borycki, Maciej Wojtkowski
Abstract
Fourier-domain full-field optical coherence tomography (FD-FF-OCT) has recently emerged as a fast alternative to point-scanning confocal OCT in eye imaging. However, when imaging the cornea with FD-FF-OCT, a spatially coherent laser can focus down on the retina to a spot that exceeds the maximum permissible exposure level. Here we demonstrate that a long multimode fiber with a small core can be used to reduce the spatial coherence of the laser and, thus, enable ultrafast in vivo volumetric imaging of the human cornea without causing risk to the retina.
Topics & Concepts
Optical coherence tomographyOpticsMulti-mode optical fiberMaterials sciencePoint spread functionCoherence (philosophical gambling strategy)Preclinical imagingCorneaLaserOptical fiberPhysicsIn vivoBiotechnologyQuantum mechanicsBiologyOptical Coherence Tomography ApplicationsCorneal surgery and disordersPhotoacoustic and Ultrasonic Imaging