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.
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 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.
A new modified signed-digit (MSD) addition algorithm based on binary logic gates is proposed for parallel computing. It is shown that by encoding each of the input MSD digits and flag digits into a pair of binary bits...
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ISBN:
(纸本)081944555X
A new modified signed-digit (MSD) addition algorithm based on binary logic gates is proposed for parallel computing. It is shown that by encoding each of the input MSD digits and flag digits into a pair of binary bits, the number of addition steps can be reduced to two. The flag digit is introduced to characterize the next low order pair (NLOP) of the input digits in order to suppress carry propagation. The rules for two-step addition of binary coded MSD (BCMSD) numbers are formulated that can be implemented using optical shadow-casting logic system.
Nowadays, in order to take advantage of fiber optic bandwidth, any optical communications system tends to be WDM. The way to extract a channel, characterized by a wavelength, from the optical fiber is to filter the sp...
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ISBN:
(纸本)081944555X
Nowadays, in order to take advantage of fiber optic bandwidth, any optical communications system tends to be WDM. The way to extract a channel, characterized by a wavelength, from the optical fiber is to filter the specific wavelength. This gives the systems a low degree of freedom due to the fact of the static character of most of the employed devices. In this paper we will present a different way to extract channels from an optical fiber with WDM transmission. The employed method is based on an Optically Programmable Logic Cells (OPLC) previously published by us, for other applications as a chaotic generator or as basic element for optical computing. In this paper we will describe the configuration of the OPLC to be employed as a dropping device. It acts as a filter because it will extract the data carried by a concrete wavelength. It does depend, internally, on the wavelength. We will show how the intensity of the signal is able to select the chosen information from the line. It will be also demonstrated that a new idea of redundant information it is the way of selecting the concrete wavelength. As a matter of fact this idea is apparently the only way to use the OPLC as a dropping device. Moreover, based on these concepts, a similar way to route signals to different routes is reported. The basis is the use of photonic switching configurations, namely Batcher or Bayan structures, where the unit switching cells are the above indicated OPLCs.
Several circuits, the following two are denoted by (A) and (B), are needed for decoupling of light-wave circuits (LWCs) and for a future transfer function matrix (TFM) synthesis of LWCs. (A) Controller matrix of a fee...
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ISBN:
(纸本)081944555X
Several circuits, the following two are denoted by (A) and (B), are needed for decoupling of light-wave circuits (LWCs) and for a future transfer function matrix (TFM) synthesis of LWCs. (A) Controller matrix of a feedback (FB) which is an optical network composed of (i) variable weighted distributed FBs, implemented by electro-optically tunable gratings at waveguides (WGs) and (ii) optical isolators (OIs) or (iii) switches, respectively, for the correct flow of the optical field in the network. The controller matrix may be generalized to include space-variable elements according to a step function by step-wise arranged electrodes at the substrate of the gratings. Another generalization is the introduction of several wavelengths by subsequently arranged gratings of different spacing at the WGs of the controller matrix. The inclusion of such controller matrices at several wavelengths into a WDM switch requires various frequency converters (FCs) for the non-blocking operation. (B) Optical differentiator with regard to the longitudinal space coordinate of a WG which is composed of (i) reflection-type Mach-Zehnder interferometers (RMZIs) arranged at a (ii) fish-bone WG pattern for the implementation of the parallel RMZIs. The interleaved organization of the arms in (ii) provides the approximate differentiation of tile optical field in a WG. The application of (A) and (B) to the advanced control of couplers is proposed (derivative FB). The paper presents circuits and their principles rather than their evaluation. The final goal is the photonic integration of the presented decoupling circuits.
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