External collaborations

We have an on-going collaboration with Dwayne Miller’s group at the Max Planck Institute for the Structure and Dynamics of Matter (Hamburg) on developing hollow-core fibres for delivering light at 3 µm for scar-free surgery. Together with the Max Planck Institute for Biological Cybernetics in Tübingen we are investigating the feasibility of collecting weak fluorescent signals through a PCF inserted into a brain while simultaneously mapping the brain function using functional MRI. Researchers from the Karlsruhe Institute of Technology are using their synchrotron to transmit x-rays through PCF to compare their transmission properties with those of the simple tapered glass capillaries currently used for focusing, as well as measuring the surface roughness inside PCFs fabricated by different methods. For a collaboration with researchers at the University of Twente, we designed and fabricated high numerical aperture PCFs (see below) for use in high-resolution endoscopic imaging by wavefront shaping at the fibre output [Amitonova (2016)].

Three different high numerical aperture (NA) PCFs used in wavefront shaping experiments for focusing the output. The NA increases as the glass walls holding the core are made thinner (left to right) and reaches a value of ~0.59 in the right-most PCF with only 160 nm wall-thickness.