Wideband Electrically Pumped 1050-nm MEMS-Tunable VCSEL for Ophthalmic Imaging
Author(s)John, Demis D.; Burgner, Christopher B.; Potsaid, Benjamin; Robertson, Martin E.; Choi, Woo Jhon; Cable, Alex E.; Fujimoto, James G.; Jayaraman, Vijaysekhar; Lee, ByungKun; ... Show more Show less
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In this paper, we present a 1050-nm electrically pumped microelectromechanically tunable vertical cavity surface-emitting laser (MEMS-VCSEL) with a record dynamic tuning bandwidth of 63.8 nm, suitable for swept-source optical coherence tomography (SS-OCT) imaging. These devices provide reduced cost and complexity relative to previously demonstrated optically pumped devices by obviating the need for a pump laser and associated hardware. We demonstrate ophthalmic SS-OCT imaging with the electrically-pumped MEMS-VCSEL at a 400 kHz axial scan rate for wide-field imaging of the in vivo human retina over a 12 mm × 12 mm field and for OCT angiography of the macula over 6 mm × 6 mm and 3 mm × 3 mm fields to show retinal vasculature and capillary structure near the fovea. These results demonstrate the feasibility of electrically pumped MEMS-VCSELs in ophthalmic instrumentation, the largest clinical application of OCT. In addition, we estimate that the 3 dB coherence length in air is 225 ± 51 m, far greater than required for ophthalmic SS-OCT and suggestive of other distance ranging applications.
DepartmentMassachusetts Institute of Technology. Department of Electrical Engineering and Computer Science
Journal of Lightwave Technology
Institute of Electrical and Electronics Engineers (IEEE)
John, Demis D., Christopher B. Burgner, Benjamin Potsaid, Martin E. Robertson, Byung Kun Lee, Woo Jhon Choi, Alex E. Cable, James G. Fujimoto, and Vijaysekhar Jayaraman. “Wideband Electrically Pumped 1050-Nm MEMS-Tunable VCSEL for Ophthalmic Imaging.” Journal of Lightwave Technology 33, no. 16 (August 15, 2015): 3461–3468.
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