Holographic Interconnects for Optical Neural Networks

Holographic Interconnects for Optical Neural Networks
Author:
Publisher:
Total Pages: 0
Release: 1997
Genre:
ISBN:

This research work focused on the development of diffractive optic interconnect elements (DOIEs), which are computer designed, e-beam fabricated holograms used for implementing free space optical interconnects. Accomplishments of the work included development of an improved hybrid design strategy for the design of phase only holograms, development of a versatile software package for hologram design and analysis, continued development and characterization of the e-beam fabrication technology, careful measurement of the performance achieved by fabicated holograms, and investigation of applications that utilize the technology. The applications included optical neural networks, which require analog weighted interconnects, and digital optical computers utilizing binary weighted interconnects. The software package for interconnect design, evaluation, and reconstruction (SPIDER) was written to run on Unix based computer platforms and is freely available over the Internet.

Free Space Optical Communication

Free Space Optical Communication
Author: A. Arockia Bazil Raj
Publisher: Walter de Gruyter GmbH & Co KG
Total Pages: 287
Release: 2015-12-18
Genre: Technology & Engineering
ISBN: 311045016X

Recent progress in ICT has exceeded our expectations for meeting the requirement of multimedia society in the 21st century. The FSOC is considered to be one of the key technologies for realizing very high speed multi GbPs large-capacity terrestrial and aerospace communications. In FSOC, the optical beam propagation in the turbulent atmosphere is severely affected by various factors suspended in the channel. Wavefront aberration correcting with continuous beam alignment are the key requirements for a successful installation of an FSOC system which are the main contributions in our book. Establishment of FSOC setups, development of accurate weather station, measurement of atmospheric attenuation (Att) and turbulence strength (Cn2), development of new models to predict the Att and Cn2, design of Response Surface Model and Artificial Neural Network based on controller, implementation of neural-controller in FPGA and attaining the BER of 6.4x10^-9 during different outdoor environments. All the original contributions, newness, findings and experimental results etc., are reported in the book. Subject of work; Wireless Optical Communication. The content of the book can be referred by various application designers and/or academicians for working on FSOC transceiver design, laser cutting, laser metrology, laser surgery, beam focusing & pointing, beacon positioning and coupling etc. Further, all necessary MATLAB and VHDL codes are also given on appropriate pages for the readers' quick/ clear understanding.

Handbook of Optical Interconnects

Handbook of Optical Interconnects
Author: Shigeru Kawai
Publisher: CRC Press
Total Pages: 317
Release: 2018-10-03
Genre: Computers
ISBN: 1351836854

As we reach the data transmission limits of copper wire and communications experts seek to bring the speed of long-haul fiber optics networks closer to access points, optical interconnects promise to provide efficient, high-speed data transmission for the next generation of networks and systems. They offer higher bit-rates, virtually no crosstalk, lower demands on power requirements and thermal management, and the possibility of two-dimensional channel arrays for chip-to-chip communication. The Handbook of Optical Interconnects introduces the systems and devices that will bring the speed and quality of optical transmission closer to the circuit board. Contributed by active experts, most from leading technology companies in the US and Japan, this outstanding handbook details various low-cost and small-size configurations, illustrates the discussion with more than 300 figures, and offers a look at the applications and future of this exciting and rapidly growing field. The book includes a detailed introduction to vertical cavity surface-emitting lasers (VCSELs); the use of optical interconnects in metropolitan, local-area, and access networks through FTTP (FTTH); and Jisso technologies, which are critical for developing low-cost, small-size modules. Driving down the size and cost of optical interconnects is vital for integrating these technologies into the network and onto microprocessors, and the Handbook of Optical Interconnects provides the knowledge and tools necessary to accomplish these goals.

Polyhedral Integrated and Free Space Optical Interconnection

Polyhedral Integrated and Free Space Optical Interconnection
Author:
Publisher:
Total Pages:
Release: 1998
Genre:
ISBN:

An optical communication system uses holographic optical elements to provide guided wave and non-guided communication, resulting in high bandwidth, high connectivity optical communications. Holograms within holographic optical elements route optical signals between elements and between nodes connected to elements. Angular and wavelength multiplexing allow the elements to provide high connectivity. The combination of guided and non-guided communication allows compact polyhedral system geometries. Guided wave communications provided by multiplexed substrate-mode holographic optical elements eases system alignment.

Free-Space Optics

Free-Space Optics
Author: Olivier Bouchet
Publisher: John Wiley & Sons
Total Pages: 221
Release: 2010-01-05
Genre: Technology & Engineering
ISBN: 0470394412

Free space optics is a telecommunications technique which is already being used for everyday exchange of information and has many advantages over other techniques (bandwidth, low cost, mobility of the equipment, security, etc.); within the next decade, it is likely to become an integral and essential part of data-processing architectures and telecommunications. A history of wireless optical telecommunications is given, together with a recapitulation of the application of the principles of electromagnetism to free-space optics. Coverage is also given to the transmitters and receivers of optical beams, whih are the basis of any optical communication system. These devices were responsible for the first truly significant advances in the performance of these systems. Special attention is given to the problems associated with the propagation of photons, both in the presence and absence of obstacles, since these are key issues in gaining an understanding of future telecommunication systems based on wireless optics. Finally, the authors considwer standards, as well as safety and confidentiality issues.