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Proceedings of SPIE: photonic devices and algorithms for computing vi

Proceedings of SPIE: Photonic Devices and Algorithms for Com...

引用

photonic devices and algorithms for computing vi

The proceedings contain 35 papers from the Proceedings of SPIE: photonic devices and algorithms for computing vi. The topics discussed include: planar integrated free-space optics for optical interconnects and fan-out/in operations;waveguide-coupled CMOS photodetector for on-chip optical interconnects;ultrafast all-optical wavelength conversion based on (3+1)-D optical soliton dragging interaction;isolating resolution enhancement on moving objects in a video sequence;generalized algebraic algorithm for scene-based nonuniformity correction;nearly wavelength-independent interference and diffraction patterns;and measurement of temperature and strain using fiber Bragg sensor and angle-facet laser.

关键词： Optical interconnects

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Multi-phonon scattering of light with direct transitions between optical modes in uniaxial single crystals and its application to an all-optical computing

Multi-phonon scattering of light with direct transitions bet...

引用

conference on photonic devices and algorithms for computing vi

作者： Shcherbakov, AS Rodriguez, ET Lopez, AA Natl Inst Astrophys Opt & Elect Puebla 72000 Mexico

ISBN: (纸本)081945494X

A specific case of a multi-phonon non-collinear light scattering in optically uniaxial media is presented. Compared to our previous studies, an innovation lies in the fact that now we consider passing just the quartet of incident light beams through a single crystal that is perturbed by the triplet of coherent acoustic waves. The exact and closed analytical model for describing this strongly nonlinear phenomenon is developed. In fact, specially designed regime of a four-order light scattering whit direct coupling of all the light modes, when transitions of four input light beams into four output light modes are allowed and electronically controlled, is examined. The feasibility of applying such an effect to an all-optical computing and performing an all-optical adder is analyzed.

关键词： all-optical computing logic-based data processing acousto-optical device

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Simulation of photonic crystals antenna using ADI-FDTD method

Simulation of photonic crystals antenna using ADI-FDTD metho...

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conference on photonic devices and algorithms for computing vi

作者： Wu, ZZ Zhong, XX Yu, WG Chen, Y Chongqing Univ Dept Optoelect Engn Chongqing 400044 Peoples R China

ISBN: (纸本)081945494X

In order to meet the demand for miniaturization and excellent performances of antennas to send and receive the wireless signals, in this paper a novel photonic Band Gap (PBG) structure of a two-dimensional square lattice array etched on one side of silicon wafer is proposed as the grounds of a microstrip patch antenna. An analysis of the performance of a patch antenna with a PBG ground has been carried out, then two rectangle MEMS microstrip antennas with a conventional and a PBG ground respectively, are designed, while the alternating direction implicit finite-difference time-domain (ADI-FDTD) is adopted to perform time simulations of Gaussian pulse propagation in the microstrip antennas, as a result of the versatile method, the frequency-dependent scattering parameters and input impedance could be derived. An important reduction of the surface waves in the PBG antenna has been observed in the simulations, which consequently leads to an improvement of the antenna efficiency and bandwidth. Subsequently, the MEMS PBG antenna is micromachined and measured, and the simulation characteristics are verified by the measured curves of the MEMS PBG antenna. The measured peak return loss of PBG patch antenna is -21dB at 5.36GHz, and the bandwidth of 8.5%, which is three times wider than that of the conventional patch, therefore the gain and the bandwidth are enhanced by means of PBG process.

关键词： PBG structure microstrip antenna ADI-FDTD simulation MEMS

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Optical implementations of threshold decomposition and morphological operations with dual-rail processing

Optical implementations of threshold decomposition and morph...

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conference on photonic devices and algorithms for computing vi

作者： Buczynski, R Szoplik, T Thienpont, H Warsaw Univ Fac Phys Informat Opt Grp PL-02093 Warsaw Poland

ISBN: (纸本)081945494X

Fast parallel processing of gray-scale images and exact hard-clip thresholding are two important functionalities necessary in optoelectronic implementations of structural processors. The parallel nature of processing stems from optical implementation of local operations with arrays of active smart pixels. We have demonstrated a morphological image processor composed of arrays of bistable optoelectronic transceivers which are connected in differential pairs and work as comparators. The use of differential pairs of optical thyristors fabricated in GaAs technology allows to realize a dual rail architecture for this photonic morphological image processor. The processor consists of a thresholding module and a binary morphological processing module. The thresholding module decomposes gray level images into series of binary slices. In the binary morphological processing module operations are performed within a neighborhood defined by a structuring element implemented as a diffractive fan-out element. In the prototype set-up we demonstrate median filtering, dilation and erosion operations performed for an image of 8x8 pixels and threshold decomposition of 6 gray level images. In principle all rank order as well as morphological filters can be optically calculated in the set-up. Additional functionality of the processor is achieved with use of the electronic layer with digital cellular processors. The electronic layer, designed as an array of simple digital processors, realizes a set of operations on binary images using 4 bit programmable weights. Simulation results for 0.8 mum CMOS technology are presented. We discuss the limitations of the photonic morphological image processing with respect to bandwidth, parallelism and architecture of the processor.

关键词： local image processing smart pixels mathematical morphology photonic processors threshold decomposition

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Planar integrated free-space optics for optical interconnects and fan-out/in operations

Planar integrated free-space optics for optical interconnect...

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conference on photonic devices and algorithms for computing vi

作者： Jarczynski, M Jahns, R Univ Hagen Dept Elect Engn Opt Informat Technol ONT D-58084 Hagen Germany

ISBN: (纸本)081945494X

The advantages of optical interconnections, like low latency and large bandwidth, are currently becoming more important for on-board or multi-board systems. Clock distribution and data transfer with high channel density and high frequency over areas in order of several centimeters up to a few meters are of interest, e.g., in multi-processor systems. As an approach to solve the challenges of interconnections and fanning we investigate planar integrated free-space optical systems (PIFSO). In the "High-speed Opto-eLectronic Memory System" project (short: HOLMS), supported by the European Commission, a multi-processor system with optical processor memory interconnection is being demonstrated. The system combines different optics technologies. The PIFSO technology is used as the interface between opto-electronic components and optical fibers and/or PCB-embedded waveguides. The tasks of this interface are to realize the pitch transfer, e.g. from the waveguide array to the opto-electronic device array, fan-in and fan-out. To realize the different aspects of these tasks, suitable micro-optical imaging techniques and fan-out approaches are considered. To handle the large numerical aperture of the optical multimode field emerging from the VCSEL-diodes and the waveguides (up to around 0.2), the concept of pupil division is being investigated for the fan-out operation. Practical aspects such as footprint and tolerances are also considered. The feasibility of implementation of the PIFSO interconnect will be shown by means of simulations and experimental demonstration.

关键词： free-space optics micro-optics optical interconnections optical design opto-electronic devices optical computing

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Herd male genetic algorithm

Herd male genetic algorithm

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conference on photonic devices and algorithms for computing II

作者： Caulfield, HJ Phys Opt Corp Nashville TN 37208 USA

ISBN: (纸本)081943759X

There are two extremes in optimization with little ground between them. They are local optimization and global optimization. Local optimization is normally very fast, but the optimum it finds may be far from the best (global) optimum. Global optimization is very slow, but it gives the best optimum - at least in principle. Using mammal herds as rough models, we suggest a new evolutionary method that has aspects of both and achieves intermediate results most of the time: faster-than-global convergence with better-than-local performance.

关键词： Genetic algorithms Fourier transforms Optical filters Performance modeling algorithms Chemical elements Genetics Optimization (mathematics) photonic devices Stochastic processes

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Study on silicon photonic devices for photonic neural network 6

Study on silicon photonic devices for photonic neural networ...

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conference on Nanophotonics and Micro/Nano Optics vi

作者： Li, Bin Tang, Bo Yang, Yan Zhang, Peng Liu, Ruonan Zhao, Bin Li, Zhihua Bai, Bing Chinese Acad Sci Inst Microelect Beijing 100029 Peoples R China Photoncounts Beijng Technol Co Ltd Beijing 100081 Peoples R China

ISBN: (纸本)9781510639287

With the rapid development of artificial intelligence, the traditional computer architecture can no longer meet the growing computing performance requirements. At the same time, with the chip manufacturing process approaching the physical limit, a single electronic technology cannot adapt the rapid development of artificial intelligence chips, so there is an urgent need for new computing chips. photonic neural network chip, which combines artificial intelligence, silicon photonic, integrated circuit and other technologies, will get unprecedented opportunities for the development. Silicon-based opto-electronic integration is a large-scale integration technology with optical signal as the main information carrier. It can integrate micro-nano-size optical and electrical devices on the silicon substrate, to form a new large-scale integration chip with comprehensive functions. At present, the development of silicon photonic devices is mainly focused on the field of optical communication and data center, while silicon photonic devices for photonic neural networks are still in the initial stage. Starting from the underlying unit devices, silicon-based photonic devices were studied deeply by combining the artificial neural network with the silicon photonic technology in this paper. Based on 200 mm CMOS process, a lot of process modules for photonic neural network were developed. According to the characteristics of photonic neural network architecture and the performance requirements for the basic unit devices, a series of silicon photonic devices, such as waveguides, grating couplers, MMI, thermal modulators, and other unit devices, were designed and developed. These devices provide important basic conditions for the implementation of high-performance photonic neural network chips.

关键词： Silicon photonic devices photonic neural network CMOS process

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High aspect ratio submicron microstructures in LiNbO₃:: fabrication and potential applications to photonic devices

High aspect ratio submicron microstructures in LiNbO<sub>3</...

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conference on photonic devices and algorithms for computing

作者： Yin, SZ Penn State Univ Dept Elect Engn University Pk PA 16802 USA

ISBN: (纸本)0819432911

Fabrication of high aspect ratio submicron to nanometer range micro structures in LiNbO3 using a state of the art Schlumberger AMS 3000 focused ion beam (FIB) system is presented. The submicron structures with about 350 nm width and 1600 nm depth are fabricated by employing XeF2 gas assisted Gallium ion beam etching with 50 pA of ion beam current. A variety of opto-electronic devices such as micro sensors, directional couplers, extremely compact electro-optic modulators and wavelength filters could be built based on this type of high aspect ratio submicron structures in LiNbO3, which may lead to the next generation of integrated opto-electronic devices that have higher levels of device integration and enhanced functionality.

关键词： lithium niobate focused ion beam etching photonic devices microstructures MEMs

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Proceedings of SPIE: photonic devices and algorithms for computing IV

Proceedings of SPIE: Photonic Devices and Algorithms for Com...

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photonic devices and algorithms for computing IV

This Volume 4788 of the conference proceedings contains 27 papers. Topics discussed include optical microelectromechanical devices, photonic devices, materials and hardware, optical computing and interconnects and alg... 详细信息

关键词： Optical devices

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Development of an analog-to-digital converter using photonic crystals

Development of an analog-to-digital converter using photonic...

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conference on photonic devices and algorithms for computing viII

作者： Sharkway, Ahmed Chen, Caihua Miao, Binglin Shi, Shouyuan Prather, Dennis EM Photon 51 East Main StSuite 203 Newark DE 19711 USA Univ Delaware Newark DE 19716 USA

ISBN: (纸本)0819463892

In this paper, we present novel designs for all optical analog-to-digital converters simulated and realized in photonic crystal platforms. The designs presented were implemented on both photonic bandgap based structures as well as self collimation based structures. Numerical simulation results as well as fabrication results are also included. Characterization results validate the designs presented for a functional all optical two bit analog to digital converters in photonic crystals. The design presented can be further scaled to higher resolution conversion as well as to no optical frequencies if necessary.

关键词： photonic crystals photonic bandgap self collimation optical analog to digital

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