Paper 13305-74
Paper 13305-74
Phase stable OCT with a 1050 nm tunable VCSEL and photonic integrated circuit
29 January 2025 • 5:00 PM - 5:15 PM PST | Moscone South, Room 203 (Level 2)
Abstract
A turnkey phase-sensitive swept-source OCT system requires stabilization of both the swept source and main
signal interferometer. We have provided stable clocking and triggering of a 1050 nm swept MEMS VCSEL by
mounting a solid clock etalon and volume Bragg grating optical trigger inside a temperature-stabilized butterfly
package. A photonic integrated circuit (PIC) provides a phase-stable main interferometer near the sample. This
system is only sensitive to the motion of sample, not to the fibers leading to and from the PIC.
Presenter
Excelitas Technologies Corp. (United States)
Bart Johnson holds a BEE from the University of Minnesota and a PhD from MIT in electrical engineering. He has held engineering positions at MIT Lincoln Laboratory, AT&T Bell Laboratories, and McDonnell Douglas/Boeing. Since 2000 he has been employed as an electro-optics engineer at Boston-area startups CoreTek (tunable VCSELs), Azna (chirp managed lasers for telecom) and Axsun Technologies. His current position is Director of Electro-Optics Systems Engineering at Axsun involving laser-based NIR spectroscopy and Optical Coherence Tomography (OCT). In OCT, he contributes to electro-optical systems design and testing as well as theoretical modeling of swept laser sources.