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Dr Jo Coote
Dr Jo Coote profile picture
Appointment
  • Research Associate
  • Dept of Med Phys & Biomedical Eng
  • Faculty of Engineering Science
Biography

I am a researcher specialising in optical sensors, with a particular interest in fibre optic sensors and miniaturised photonic devices for biomedical applications.

I am currently a member of the Interventional Devices Group at University College London, where my research focusses on developing fibre-optic physiological sensors for use in minimally invasive surgery.

Previously, I worked with ZiNIR, a photonics SME, on developing a miniature semiconductor chip-based spectrometer, for applicatons including calibration of Earth-observation instruments on board satellites, biomedical hyperspectral imaging, and surface profiling in precision manufacturing.

I received my PhD from the Unversity of Surrey, where I developed a miniature biosensor chip based on a semiconductor laser diode, modified with focussed ion beam milling.

I received my BSc in Physics from Imperial College, London.

Research Summary

I am developing fibre-optic physiological sensors for use in minimally invasive surgery. The sensors aim to measure pressure, temperature and blood flow inside the coronary arteries, to help clinicans assess the severity of coronary disease.

Our sensors are based on low-finesse optical cavities made from polymer materials, which are formed at the tips of optical fibres. The physical properties of polymers, for example their large thermal expansion and low Young's modulus, allow them to respond to pressure and temperature with high sensitivity, meaning that a strong signal can be generated by a very small sensor element. This means the sensors can be highly miniaturised, and are therefore well-suited to minimally invasive procedures.

The sensors are interrogated with low-coherence interferometry, and the optical system we use is compact, portable and capable of high sampling rates, meaning that rapidly varying pressures and temperatures can be measured reliably. A current active area of my research is to gain a better understanding of the dynamic responses of the sensors, through simulations and novel experimental methods to perform dynamic calibration.

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