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 astonishing result was enabled by a Praevium 1310nm MEMS-VCSEL laser light source, which has been shown to have an optical coherence length of hundreds of meters [JLT 2015]. Typical OCT light sources have coherence lengths in the millimeter range, rendering such long-range imaging unfeasible. In addition, the extremely high-speed detection required for acquiring the long-range interferogram was enabled by an Acacia Networks silicon-photonics dual-quadrature receiver chip.
The full journal article is freely available here: Optica Vol. 3, Issue 12, p.1496 (2016) (open-access)
Dr. Wang also presented these results at BIOS/SPIE Photonics West 2016; view the presentation at SPIE with your conference login:
Miniaturized silicon photonic integrated swept source OCT receiver with dual polarization, dual balanced, in-phase and quadrature detection (Conference Presentation)
Proc. SPIE 9697, Optical Coherence Tomography and Coherence Domain Optical Methods in Biomedicine XX, 96970M (April 26, 2016); doi:10.1117/12.2214615
Summaries of the result and it’s impact on industrial imaging can be found at numerous journalistic outlets: