Ultrahigh speed OCT

Abstract

Optical coherence tomography (OCT) is an imaging modality that can generate micrometer resolution, two–dimensional cross–sectional images and three–dimensional volumetric data on the internal structure of optically scattering and reflective tissues and materials. The development of Fourier–domain detection enabled a breakthrough in OCT imaging sensitivity and speed, and the newest generation of OCT is based on wavelength swept light sources (Swept source /Fourier–domain OCT; SS–OCT). We describe high imaging speed and long depth range SS–OCT with an emphasis on SS–OCT technology using MEMS–tunable vertical cavity surface–emitting lasers operating at 1,050 nm and 1,310 nm. We also review representative applications using adjustable high speed and long range SS–OCT including ophthalmic imaging (retinal, anterior segment and full eye length imaging), optical coherence microscopy, endoscopy, ocular biometry, metrology, profilometry and non–destructive material evaluation.