Dr O’Callaghan received his PhD in 2002 from the department of Physics in University College Cork under the topic of Spatial Coherence in Gain Profiled Semiconductor Lasers. He worked for two years in the department of optoelectronics in Ulm in Germany developing methods of thermal management in VCSELs before returning to his native city of Cork to work in the Tyndall National Institute as a staff scientist. Since then he has been involved in a wide range of projects from developing high brightness semiconductor lasers to telecoms based photonics devices, such as Mach-Zehnder modulators and etched facet tuneable lasers. He is currently working of the development of photonics based devices for micro transfer printing and their integration into photonic integrated circuits.
