Praevium presented a new 850nm Tunable Vertical-Cavity laser (MEMS-VCSEL) at OSA’s Laser Congress: Advanced Solid-State Lasers, this November in Boston, MA. The device is intended for swept-source ophthalmic imaging, and thus features wide-bandwidth and high-speed tuning in ranges suitable for OCT imaging, and is electrically-pumped rather than optically-pumped. Initial ophthalmic images were presented, acquired by the Byunkun Ben Lee and Dr. Ben Potsaid from MIT's Fujimoto G

D. D. John, B. Lee, Benjamin Potsaid, A. C. Kennedy, M. E. Robertson, C. B. Burgner, A. E. Cable, J. G. Fujimoto, and V. Jayaraman Presented at the OSA Laser Congress: Advanced Solid-State Lasers, Boston, MA, USA, Nov. 2016, paper # 2565017. Download PDF here We demonstrate a new electrically-pumped MEMS-VCSEL at 850nm, intended for ophthalmic imaging. Although the tuning range is similar to previously published results from TU Denmark, this device was designed with high-spee

Greg B. Rieker and Torrey R. S. Hayden Optics Express, Vol. 24, Issue 24, pp. 27910-27921 (2016). Download here (open-access) Prof. Greg Rieker and his student Torrey Hayden used Praevium’s 1550nm MEMS-VCSEL demo unit to acquire gas spectroscopy of carbon dioxide using Wavelength Modulated Spectroscopy (WMS). The WMS technique is higher sensitivity than direct detection due to the acquisition of a 2f signal rather than a simple 1f signal. This requires a laser that can be mod