N ATIONAL U NIVERSITY OF I RELAND,C ORK . MASTER’ S T HESIS On-Chip Integration of Lasers with Photodetectors Author: Niall Boohan Supervisor: Brian Corbett A thesis submitted in fulfilment of the requirements for the degree of Master of Science in the III-V Materials and Devices Group, Department of Physics Head of Department: Prof. John McInerney September 17, 2017