September 1, 2020

https://engineering.ucsb.edu/undergraduate/voices/bernie

BERNIE CELIS, ELECTRICAL ENGINEERING, BS 2017

I live in Goleta and work at Praevium Research. The company makes VCSELs [vertical- cavity surface-emitting lasers], which are very useful in medical applications and a...

June 24, 2020

Vijay Jayaraman recently gave a talk at the 2020 CLEO conference, discussing the progress of our tunable MEMS-VCSELs. Skip ahead to 1:30:30 to view! 

Recent Progress In Rapidly Tuned MEMS-VCSELs From Near To Mid-Infrared

 

March 4, 2020

Tunable room-temperature continuous-wave mid-infrared VCSELs

V. Jayaraman, B. Kolasa, et al.

During the last two years, our group has demonstrated the first room temperature continuous wave (RTCW) fixed wavelength VCSELs operating above 3 microns, in both optically pumpe...

May 30, 2017

Zhao Wang, Ben Potsaid, Long Chen, Chris Doerr, Hsiang-Chieh Lee, Torben Nielson, Vijaysekhar Jayaraman, Alex E. Cable, Eric Swanson and James G. Fujimoto
Optica, Vol. 3, Issue 12, pp. 1496-1503 (open-access, click to download)

Dr. Zhao Wang at the group of Jim Fujimoto...

May 30, 2017

Dr. Zhao Wang and the group of James G. Fujimoto at MIT recently published a groundbreaking Optica paper in which 3D tomographic volumetric imaging (OCT imaging) was performed over a full one-meter-cubed volume, with 15 micron axial resolution.

The results were also pre...

November 2, 2016

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 tuni...

November 1, 2016

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 demo...

November 1, 2016

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 us...

February 3, 2016

D. D. John, C. Burgner, B. Potsaid, M. Robertson, B. Lee, W. J. Choi, A. Cable, J. Fujimoto, and V. Jayaraman

Journal of Lightwave Technology, Vol. 33, Is. 16, Feb. 2 2015

Download PDF here

We present first retinal images acquired with the new electrically-pumped 1050nm M...

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