High-resolution 1050 nm spectral domain retinal optical coherence tomography at 120 kHz A-scan rate with 6.1 mm imaging depth

We report a newly developed high speed 1050nm spectral domain optical coherence tomography(SD-OCT) system for imaging posterior segment of human eye. The system is capable of an axialresolution at ~10 µm in air, an imaging depth of 6.1 mm in air, a system sensitivity fall-offat ~6 dB/3mm and an imaging speed of 120,000 A-scans per second. We experimentally demonstrate thesystem’s capability to perform phase-resolved imaging of dynamic blood flow within retina,indicating high phase stability of the SDOCT system. Finally, we show an example that uses thisnewly developed system to image posterior segment of human eye with a large view of view (10× 9 mm²), providing detailed visualization of microstructural features fromanterior retina to posterior choroid. The demonstrated system parameters and imaging performancesare comparable to those that a typical 1 µm swept source OCT would deliver for retinalimaging.OCIS codes: (170.4460) Ophthalmic optics and devices, (170.3880) Medical and biological imaging, (170.4500) Optical coherence tomography