SEQUOIA is a Horizon Europe project to research the development of optical coherence tomography (OCT) using quantum techniques. OCT is a key imaging technology, allowing non-contact high resolution 3D imaging which has been successfully used for decades in fields from medicine to industrial testing.

From an incoming polarised beam, a spatial light modulator (SLM) is used to create a Laguerre-Gaussian beam with specific OAM. [Image: Alex Heemels; TU Delft).

What could QOCT offer?

State-of-the-art OCT seems to have reached its limit at ~1 micron axial resolution. Theory suggests that quantum OCT (QOCT) could half this to 0.5 microns and greatly reduce dispersion. In addition, control of the quantum property of orbital angular momentum (OAM) reduces noise and improves edge and surface profile definition and discrimination of chiral objects.

SEQUOIA aims to deliver an ultra-high resolution QOCT system, protected from noise by artificial intelligence based OAM control and explore its potential for a vital real-world application: retinal imaging.

This website will provide updates on project progress, as well as news and info on related events.