Ultrahigh-Resolution Optical Coherence Tomography with LED-Phosphor-Based Broadband Light Source

Abstract

This study proposed and demonstrated the potential use of LED phosphors as a simple light source for ultrahigh-resolution spectral-domain optical coherence tomography (SD-OCT) in the visible regime. Excited by a 405 nm diode laser, broadband spontaneous emission from three different LED phosphors was generated. The best axial resolution was 1.7 mu m in air, and finally, corresponding three-dimensional (3D) ultrahigh-resolution SD-OCT imaging was performed with the proposed broadband light source. (C) 2013 The Japan Society of Applied Physics