Wideband Electrically-Pumped 1050 nm MEMS-Tunable VCSEL for Ophthalmic Imaging.
Wideband Electrically-Pumped 1050 nm MEMS-Tunable VCSEL for Ophthalmic Imaging.
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DOI：
10.1109/jlt.2015.2397860
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发表时间：
2015-08-15
期刊：
影响因子：
--
通讯作者：
Jayaraman V
中科院分区：
文献类型：
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作者：
John DD;Burgner CB;Potsaid B;Robertson ME;Lee BK;Choi WJ;Cable AE;Fujimoto JG;Jayaraman V
提出了一种1050 nm电泵浦微机电调谐垂直腔面发射激光器（MEMS-VCSEL），记录动态调谐带宽为63.8 nm，适用于扫频光源光学相干层析成像（SS-OCT）。这些设备通过消除对泵浦激光器和相关硬件的需要，相对于先前展示的光泵浦设备提供了降低的成本和复杂性。我们演示了使用电泵浦MEMS-VCSEL以400 kHz轴向扫描速率进行的眼科SS-OCT成像，用于在12 mm × 12 mm视野内对活体人类视网膜进行宽视野成像，并用于在6 mm × 6 mm和3 mm × 3 mm视野内对黄斑进行OCT血管造影，以显示中央凹附近的视网膜血管和毛细血管结构。这些结果证明了电泵浦MEMS-VCSEL在眼科仪器中的可行性，这是OCT的最大临床应用。此外，我们估计空气中的3 dB相干长度为225米± 51米，远大于眼科SS-OCT所需的长度，并暗示了其他距离测距应用。
In this paper, we present a 1050 nm electrically-pumped micro-electro-mechanically-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 & 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 & 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 meters ± 51 meters, far greater than required for ophthalmic SS-OCT and suggestive of other distance ranging applications.