850nm MEMS-Tunable VCSEL at Laser Congress, Boston
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

Single-Mode and High-Speed 850nm MEMS-VCSEL
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

Large amplitude wavelength modulation spectroscopy for sensitive measurements of broad absorbers
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