The Fiber Sensors & Supercontinuum Group at DTU Fotonik, Department of Photonics Engineering at the Technical University of Denmark is seeking a candidate for a 4-year Postdoc position in the field of Optical Coherence Tomography (OCT) system operating in the mid-infrared. The position is funded by the project “Spectrally shaped supercontinuum sources for high-resolution Optical Coherence Tomography medical imaging and non-destructive testing” (ShapeOCT).

Summary of the project ShapeOCT
ShapeOCT will use Danish strongholds in supercontinuum (SC) light source and photonic crystal fiber (PCF) technology to develop a new generation of SC light sources with shaped noise and power spectra that are optimal for use in a new generation of ultra-high resolution Optical Coherence Tomography (UHROCT) systems. Noise reduction and spectral shaping of the SC will be done by intricate dispersion design and using normal dispersion femto-second pumping, fiber tapering and concatenation. Three state-of-the-art spectral domain UHROCT systems will be developed that operate (I) at 1.3µm with a low-noise SC source using a silica PCF, and (II, III) in the mid-infrared (MIR) at 4 and 7µm with an SC source using a ZBLAN and chalcogenide fiber, respectively. The improved resolution of UHROCT system (I) will be evaluated against a commercial OCT system in skin cancer diagnostics. All UHROCT systems I-III are highly suited for non-destructive testing (NDT) and will be evaluated against each other and existing OCT systems for their increased resolution and penetration depth in testing of fiber-reinforced polymer (emerging construction material). For the MIR SC sources and OCT systems ShapeOCT will invest in state-of-the-art equipment for fiber drawing and glass manufacturing to establish a chalcogenide MIR fiber technology platform in Denmark and move the SC source into the 3-12µm molecular fingerprint region, which is of fundamental importance for not just OCT, but also for ultra-fast spectroscopy tools for cancer detection, pollution, and food and soil quality monitoring. Nano-imprinting of the end-facet of chalcogenide fibers will be developed for improved power handling and low loss coupling (today 40% Fresnel loss is suffered), and ultra-broadband MIR detectors will be developed based on upconversion.

Responsibilities and tasks 
The selected postdoc candidate will participate in a project team of 4 postdocs and 4 PhD students hired specifically on the project, in addition to the participating senior staff. The postdoc will specifically be in charge of the hardware side of developing the UHROCT system using the low-noise SC sources and up-conversion MIR cameras developed by the other partners / work packages in the project. The candidate will also be co-supervisor of a PhD student on the image processing software side of the systems.

The candidate is thus expected to

• Assemple and test 3 full MIR UHROCT systems at 1.3, 4, and 7 microns.
• Apply the 4 and 7 micron systems in NDT of samples from partner RECENDT
• Supervise a PhD student in OCT imaging software
• Interact strongly with Univ Kent and spend a period of about 6 month there for training in OCT

Qualifications
Candidates should have a PhD degree or equivalent, preferably in OCT. In addition we expect candidates to

• Be fluent in English
• Have good experience with fiber optics
• Be willing to work in close collaboration with an internal project team and with external international partners

Application deadline: 1 March 2015

To view the full announcement and to apply: www.career.dtu.dk