This book constitutes the thoroughly refereed post-conference proceedings of the 4th International Workshop on Optical SuperComputing, OSC 2012, held in Bertinoro, Italy, in July 2012. The 11 papers presented together with 11 invited papers were carefully reviewed and selected for inclusion in this book. Being an annual forum for research presentations on all facets of optical computing for solving hard computation tasks, OCS addresses the following topics of interest: design of optical computing devices, electro-optic devices for interacting with optical computing devices, practical implementations, analysis of existing devices and case studies, optical and laser switching technologies, applications and algorithms for optical devices, alpha particles, X-rays and nano-technologies for optical computing.

This book constitutes the thoroughly refereed post-conference proceedings of the Third International Workshop on Optical SuperComputing, OSC 2010, held in Bertinoro, Italy, in November 2010. The 13 papers presented were carefully reviewed and selected for inclusion in this book. Being an annual forum for research presentations on all facets of optical computing for solving hard computation tasks, OCS addresses the following topics of interest: designs or demonstrations of optical computing devices, algorithmics and complexity issues of optical computing, computation representation by photons and holograms, neural and brain inspired architectures, electro-optic devices for interacting with optical computing devices, practical implementations, analysis of existing devices and case studies, optical photonics and laser switching technologies, optical and photonic memories, optical signal processing subsystems, optical networks for high-performance computing, optical interconnections, quantum optical systems, applications and algorithms for optical devices, Alpha particles, X-rays, and nano-technologies for optical computing.

OSC, the International Workshop on Optical SuperComputing, is a new annual forum for research presentations on all facets of optical computing for solving hard computation tasks. Optical computing devices have the potential to be the next computing infrastructure. Despite the frequency limitations and cross-talk phenomena, as well as soft-errors of electronic devices the natural parallelism of optical computing devices, along with the advance in ?ber optics and - tical switches make optical computing commercial-able. The workshop focuses on in research on the theory, design, speci?cation, analysis, implementation, or application of optical supercomputers. Topics of interest include, but are not limited to: designs or demonstrations of optical computing devices and systems; algorithmics and complexity issues of optical computing; computation rep- sentation by photons and holograms; neural and brain inspired architectures; electro-optic devices for interacting with optical computing devices; practical implementations; analysis of existing devices and case studies; optical photonics and laser switching technologies; optical and photonic memories; optical signal processing subsystems; optical networks for high-performance computing; op- cal interconnections; quantum optical systems; applications and algorithms for optical devices; alpha particles, X-rays and nano-technologies for optical c- puting. The second OSC workshop was held during November 18-20, 2009, in Bertinoro International Center for Informatics, Bici, Italy. This volume contains 19 contributions selected by the Program Committee. All submitted papers werereadandevaluated bythe ProgramCommittee m- bers. We aregratefulto the EasyChairsystemin assistingthe reviewingprocess. OSC 2009 was organized in cooperation with SPIE and OSA.

OCS, the International Workshop on Optical SuperComputing, is a new annual forum for research presentations on all facets of optical computing for solving hard computation tasks. Optical computing devices have the potential to build the very next computing infrastructure. Given the frequency limitations and cross-talk phenomena, as well as the soft-errors, of electronic devices on one hand, and the natural parallelism of optical computing devices, as well as the advances in ?ber optics and optical switches, on the other hand, optical c- puting is becoming increasingly marketable. The focus of the workshop is on research surrounding the theory, design, speci?cation, analysis, implementation, and application of optical supercomputers. Topics of interest include, but are not limited to: design of optical computing devices; electro-optics devices for interacting with optical computing devices; practical implementations; analysis of existing devices and case studies; optical and laser switching technologies; applications and algorithms for optical devices; and alpha practical, x-rays and nano-technologies for optical computing. The First OSC workshop was held on August 26th, 2008, in Vienna, Austria, co-located with the 7th International Conference on Unconventional Computing. This volume contains eight contributions selected by the program committee andtwoinvitedpapers. Allsubmittedpaperswerereadandevaluatedbyatleast three program committee members, assisted by external reviewers. The review process was aided by the EasyChair system. OSC 2008 was organized in cooperation with OSA the Optical Society of America. The support of Ben-Gurion University and Babe?-Bolyai University is also gratefully acknowledged.