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 densi...
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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.
photonic true time delay is very important for phased array antenna applications. The conventional photonic delay line architectures have very high insertion loss. Therefore, the deployment of these photonic delay lin...
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ISBN:
(纸本)081945074X
photonic true time delay is very important for phased array antenna applications. The conventional photonic delay line architectures have very high insertion loss. Therefore, the deployment of these photonic delay lines for phased array antennas is not cost effective. In this paper, we will review and compare the performance of different fiber optic photonic delay line architectures. To explore the application of MEMS mirror for photonic true time delay, a multi-base photonic delay line architecture is employed because this architecture has the potential to exhibit ultra-low loss for large binary bit photonic delay. Approaches to implement this photonic delay line architecture based on optical MEMS mirror technology have been proposed and theoretically analyzed. The proposed photonic delay line approaches may provide an ultra-low loss, module, low cost, and deployable photonic delay line for phased array beam forming applications.
We present a novel design of an 1X2 photonic crystal beam splitter using silicon-on-insulator integrated optical technology. According to the design, we can reduce the size of beam splitter without increasing the prop...
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ISBN:
(纸本)081945074X
We present a novel design of an 1X2 photonic crystal beam splitter using silicon-on-insulator integrated optical technology. According to the design, we can reduce the size of beam splitter without increasing the propagation loss. In this paper, we study the 1X2 beam splitting ratio by changing the position of the center air hole. We use a finite-difference-time-domain (FDTD) method to simulate the propagation of the light. The 1x2 PBG beam splitter is designed with 180 degree output bending angles. The size of this novel beam splitting device are 8mum x 3.44mum.
The proceedings contains 22 papers from the conference of Proceedings of SPIE - photonicdevices and algorithms for computing V. Topics discussed include: customizing a similarity filter for object recognition;optical...
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The proceedings contains 22 papers from the conference of Proceedings of SPIE - photonicdevices and algorithms for computing V. Topics discussed include: customizing a similarity filter for object recognition;optical calibration of a new two-way optical component network analyzer;a novel multiple-output and multiwavelength fiber ring optical laser;application of phase-only filter on electronic nose data and symmetric color separation gratings.
For efficient optoelectronic implementation of parallel algorithms, a novel two-step digit-set-restricted modified signed-digit (MSD) arithmetic based on content-addressable-memory is presented. With the introduction ...
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ISBN:
(纸本)081945074X
For efficient optoelectronic implementation of parallel algorithms, a novel two-step digit-set-restricted modified signed-digit (MSD) arithmetic based on content-addressable-memory is presented. With the introduction of the reference digits, carry propagation is avoided by restricting digit sets of the intermediate carry and sum into {(1) over bar ,0} and {0, 1}, respectively. In our new algorithm, without using the complement property for the nonzero outputs, only 12 minterms for all the outputs are required. More significantly, since no complement operation is involved, the optical system needs no additional reflecting unit and mask. An incoherent correlator based optoelectronic shared-content-addressable-memory processor is used to perform the arithmetic operations. A proof-of-the-principle experiment is demonstrated.
We demonstrate the two-qubit operation of two atoms embedded in photonic crystals, which is realized by applying a small DC field to the atoms according to quantum algorithms.
We demonstrate the two-qubit operation of two atoms embedded in photonic crystals, which is realized by applying a small DC field to the atoms according to quantum algorithms.
This paper deals with scatternet formation in Bluetooth. A scatternet is an ad hoc network of Bluetooth devices. Some works in the literature rely on the single-hop hypothesis, i.e., all devices are in radio visibilit...
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This paper deals with scatternet formation in Bluetooth. A scatternet is an ad hoc network of Bluetooth devices. Some works in the literature rely on the single-hop hypothesis, i.e., all devices are in radio visibility of each other. Other works refer to the more likely circumstance that devices are scattered in an area where some of them can not directly communicate. A challenging issue in this latter scenario (often referred to as multi-hop) is the design of a formation algorithm that: i) operates in a distributed way; ii) dynamically adapts the topology to the mobility of devices; iii) forms a scatternet with given topological properties. In this paper a distributed algorithm for scatternet formation that gives rise to a tree-like structure is introduced. The algorithm is shown to present three key properties that make it innovative with respect to the literature in the field: i) it is fully distributed and asynchronous; ii) it can be applied in a multi-hop environment; iii) it operates in order to dynamically adapt the topology to nodes' mobility and failures. The key steps and rules of the algorithm are described and performance results obtained by simulation are discussed.
This Volume 4788 of the conference proceedings contains 27 papers. Topics discussed include optical microelectromechanical devices, photonicdevices, materials and hardware, optical computing and interconnects and alg...
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This Volume 4788 of the conference proceedings contains 27 papers. Topics discussed include optical microelectromechanical devices, photonicdevices, materials and hardware, optical computing and interconnects and algorithms for computing.
devices for optical connections by GRIN lenses have been reported in literature. In particular, two optical configurations designed for beam size control and light deflection by tapered GRIN lenses and for correction ...
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ISBN:
(纸本)081944555X
devices for optical connections by GRIN lenses have been reported in literature. In particular, two optical configurations designed for beam size control and light deflection by tapered GRIN lenses and for correction of astigmatic gaussian beams from laser diodes by anamorphic selfoc lenses are presented.
We have developed novel optical micro-electro-mechanical systems, (MEMS) and nano-electro-mechanical, (NEMS) optical components for applications including imaging, switching, and optical integrated circuits. This pape...
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ISBN:
(纸本)081944555X
We have developed novel optical micro-electro-mechanical systems, (MEMS) and nano-electro-mechanical, (NEMS) optical components for applications including imaging, switching, and optical integrated circuits. This paper provides an overview of current optical MEMS/NEMS research projects in our integrated photonics laboratory at UCLA. Three optical MEMS/NEMS devices: a large, 1 mm diameter, scanning micromirror for imaging applications, an analog micromirror array for network switching applications, and a nanoscale photonic crystal switch for integrated photonic circuit applications will be described.
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