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Über dieses Buch

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.

Inhaltsverzeichnis

Frontmatter

Quantum Optical Transient Encryption and Processing

Abstract
This paper is written in the memory of H. John Caulfield, a unique breaking through scientist that was known for his capability of thinking “out of the box” and which has made large number of significant scientific contributions in many optics related fields. In the last few years of his carrier, John has invested some time in the field of optical quantum computing and encryption. In this paper we wish to describe one of such directions investigated by John and dealing with optical quantum encryption and processing.
Zeev Zalevsky, David Sylman, H. John Caulfield

Parallel Processing for Prime Factorization with Spatial Amplitude Modulation in Optics

Abstract
An optical method for prime factorization is modified. The procedure in the original method is similar to that with quantum computing. In this repot, some differences between the quantum solution and the method are discussed. And, improvement for our method is proposed based on the discussion.
Kouichi Nitta, Takashi Kamigiku, Takeshi Nakajima, Osamu Matoba

An Optical Polynomial Time Solution for the Satisfiability Problem

Abstract
In this paper, we have used optics to solve the satisfiability problem. The satisfiability problem is a well-known NP-complete problem in computer science, having many real world applications, which no polynomial resources solution is found for it, yet. The provided method in this paper, is based on forming patterns on photographic films iteratively to solve a given satisfiability problem in efficient time. The provided method requires polynomial time, but, exponential length films and exponential amount of energy to solve the satisfiability problem.
Sama Goliaei, Saeed Jalili

To What Extent Is Zero Energy Computing Feasible?

Abstract
Various data handling processes can be implemented without involving energy dissipation. However, these processes execute only part of a complete computing task and the remaining part will involve the loss of energy. This paper discusses some misleading concepts of reversible logic and presents a novel approach toward optical architectures with reduced energy consumption.
Joseph Shamir

All-Optical XOR Gate for QPSK In-Phase and Quadrature Components Based on Periodically Poled Lithium Niobate Waveguide for Photonic Coding and Error Detection Applications

Abstract
An all-optical scheme based on periodically poled lithium Niobate waveguide (PPLN) for signal processing of the in-phase (I) and quadrature (Q) components of an input quadrature phase shift keying (QPSK) signal is presented. The device is able to work on the I and Q components without any additional demodulation stage and makes use of cascaded second harmonic and difference frequency generation (SHG and DFG respectively) in the PPLN waveguide to obtain the logical operation XOR(I,Q). A single continuous wave pump signal is needed in addition to the input signal to generate the output signal, in which the information is coded in a binary phase shift keying (BPSK) modulation. The logical XOR(I,Q) is a basic operation that can enable data coding and error detection in all-optical networks. Bit error rate measurements are provided to evaluate the system performance for a 20Gb/s DQPSK input signal, and tunability of the output signal wavelength has been attested with almost constant optical signal-to-noise-ratio (OSNR) penalty along the C-band.
Emma Lazzeri, Antonio Malacarne, Giovanni Serafino, Antonella Bogoni

All-Optical Ultrafast Adder/Subtractor and MUX/DEMUX Circuits with Silicon Microring Resonators

Abstract
We present designs of all-optical ultrafast simultaneous NOR logic gate/Half-Adder/Subtractor, Full-Adder/Subtractor and Multiplexer/De-Multiplexer circuits using add-drop silicon microring resonators. The proposed circuits require less number of switches and inputs for realization of the desired logic compared to earlier reported designs. Multiplexer/De-Multiplexer operations can be realized from the same circuit by simply interchanging the inputs and outputs. Lower energy consumption and delays along with reconfigurability and compactness make them attractive for practical applications.
Purnima Sethi, Sukhdev Roy

Cloud Computing for Nanophotonic Simulations

Abstract
Design and analysis of complex nanophotonic and nanoelectronic structures require significant computing resources. Cloud computing infrastructure allows distributed parallel applications to achieve greater scalability and fault tolerance. The problems of effective use of high-performance computing systems for modeling and simulation of subwavelength diffraction gratings are considered. Rigorous Coupled-Wave Analysis (RCWA) is adapted to cloud computing environment. In order to accomplish this, data flow of the RCWA is analyzed and CPU-intensive operations are converted to data-intensive operations. The generated data sets are structured in accordance with the requirements of MapReduce technology.
Nikolay L. Kazanskiy, Pavel G. Serafimovich

All-Optical Ultrafast Switching and Logic with Bacteriorhodopsin Protein

Abstract
We present a detailed analysis of all-optical ultrafast switching with the unique photochromic bacteriorhodopsin (bR) protein, based on its early transitions (B570 →I460), in the pump-probe configuration. The transmission of a cw probe laser beam at 460 nm through bR is switched by a pulsed pump beam at 570 nm with high contrast and sub-ps switching. The effect of pump intensity, pump pulse width, absorption cross-section and lifetime of the I460 state on the switching characteristics has been studied in detail. Theoretical simulations are in good agreement with reported experimental results. The results have been used to design ultrafast all-optical NOT and the universal NOR and NAND logic gates with multiple pump laser pulses. The analysis demonstrates the applicability of bR for all-optical ultrafast operations in the simple pump-probe geometry and opens up exciting prospects for its use in optical supercomputing.
Sukhdev Roy, Chandresh Yadav

A Nano-Optics Vector Matrix Multiplier for Implementing State Machines

Abstract
We present a design concept for a nano optical architecture for a finite state machine. The architecture uses the Vector-Matrix-Multiplier as the basic device used to perform calculations. We provide schematics of such a device. These devices may in turn provide the building blocks for optically controlled devices.
Eyal Cohen, Shlomi Dolev, Michael Rosenblit

Optical Energy Efficient Asynchronous Automata and Circuits

Abstract
An optical architecture for energy efficient asynchronous automata is suggested. We use a logical paradigm called “Directed Logic”, based on the most basic reversible and energy efficient gate, the Fredkin gate. Directed Logic circuits for basic boolean gates as NOT, OR/NOR and AND/NAND are used. These circuits are then employed for an optical energy efficient automata. A D latch is then used to define the automata operation cycle. A set-reset latch is used as part of an handshake protocol that suggests an optical energy efficient automata operating internally in an asynchronous fashion. Lastly, we propose a circuit for asynchronous cascading between two automata.
Amir Anter, Shlomi Dolev, Joseph Shamir

Object Signature Acquisition through Compressive Scanning

Abstract
In this paper we explore the utility of compressive sensing for object signature generation in the optical domain. We use laser scanning in the data acquisition stage to obtain a small (sub-Nyquist) number of points of an object’s boundary. This can be used to construct the signature, thereby enabling object identification, reconstruction, and, image data compression. We refer to this framework as compressive scanning of objects’ signatures. The main contributions of the paper are the following: 1) we use this framework to replace parts of the digital processing with optical processing, 2) the use of compressive scanning reduces laser data obtained and maintains high reconstruction accuracy, and 3) we show that using compressive sensing can lead to a reduction in the amount of stored data without significantly affecting the utility of this data for image recognition and image compression.
Jonathan I. Tamir, Dan E. Tamir, Shlomi Dolev

All-Optical SOA-Assisted 40 Gbit/s DQPSK-to-OOK Format Conversion

Abstract
An SOA-assisted 40 Gbit/s DQPSK-to-OOK format converter is presented. An SOA-based amplification stage, after conversion, provides negative penalty (>1.5 dB) and extinction ratio improvement (up to 6 dB), also after propagation, making the converted OOK-signals suitable for optical processing.
Mirco Scaffardi, Valeria Vercesi, Sergio Pinna, Antonella Bogoni

Backmatter

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