Dr. Fisher is a post-doctoral researcher at Edinburgh University. His interests include tomography, digital signal processing and instrumentation for metrology and imaging. He is a fellow of the Software Sustainability Institute, promoting best-practices for embedded software and signal processing firmware. While his current work focuses on logic synthesis for FPGAs, he developed an all-digital array of single-photon avalanche diodes (SPADs) with a readout suitable for optical communications or metrology as a direct optical to digital converter. He has recently completed a historical analysis of avalanche multiplication and the internal photoelectric effect covering the period 1900 to 1969. He is a member of the Institute of Electrical and Electronics Engineers (IEEE), where he serves on the committee for the Sensors Council UK&I chapter and peer-reviews for Transactions on Circuits and Systems.