System for swept source optical coherence tomography
AssigneePraevium Research, Inc.
InventorVijaysekhar Jayaraman
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Abstract
A swept source Optical coherence tomography system (SSOCT) comprises a vertical cavity surface-emitting laser with an integrated MEMs tunable mirror movable by electro-static deflection. The MEMs tunable VCSEL offers scan rates greater than 100 khz and tuning ranges approaching 200 nm around 1300 nm and 150 nm around 850 nm. In the preferred embodiment of this invention, a bottom mirror of the VCSEL is comprised of a Aluminum Gallium Arsenide/Aluminum Oxide DBR stack, and a movable top mirror is comprised of a TiO2/SiO2 DBR stack. A MEMs tunable VCSEL at 1300 nm is preferably pumped through the top mirror in a wavelength range between 1050 and 1120 nm, and a MEMs tunable VCSEL at 850 nm is preferably pumped through the top mirror in a wavelength range between 700 nm and 730 nm.
Claims19
A system for swept source optical coherence tomography, the system comprising
- A vertical cavity laser with an on-chip integrated MEMs tunable mirror, and operative to emit tunable radiation,
- Means for directing said tunable radiation to a reference mirror and to a sample, and
- an optical detector for detecting an interference between light reflected from said reference mirror and said sample.
Dependencies are inferred from the claim text.