Power beam splitter based on photonic crystal row of holes and Brewster effect in SOI waveguides
ABSTRACT This Letter presents a beam splitter in a silicon-on-insulator (SOI) ridge waveguide loaded by a photonic crystal row of holes close to the Brewster angle. The propagation of the fundamental guided mode in this structure has been examined by the three-dimensional finite-difference time-domain method. It is shown that a TE-polarized optical beam exhibits the Brewster effect at an incident angle of about 39 degrees, giving a small splitting ratio (<0.04) in a wide spectral range for silica-filled holes with a typical diameter of 200 nm and a spacing of 300 nm. The row of holes close to the Brewster angle is the perspective to be used in developing complementary metal-oxide semiconductor-compatible tunable devices based on multireflector filtering technology.
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ABSTRACT: A new compact AO filter with multi-reflector beam expanders built by photonic crystal row of holes in LiNbO3 waveguide had been proposed and numerically studied by 2D FDTD method. Device has the size 70*150 μm2, FWHW 4.4 nm, tuning range 110 nm, internal loss -3dB, and sidelobes -20 dB and has a great potential for use in telecommunication and sensorings.Computational Technologies in Electrical and Electronics Engineering (SIBIRCON), 2010 IEEE Region 8 International Conference on; 01/2010
Conference Paper: CMOS compatible widely tunable multiplexers on SOI technology[Show abstract] [Hide abstract]
ABSTRACT: Paper discusses widely tunable multiplexers based on multi-reflector filtering approach. It implements novel wide CMOS-compatible silicon-on-insulator heterogeneous waveguides with thermo-optic phase shifters. Structure design has been performed by numerical modeling by BPM and FDTD methods. Device could be used for flexible redirection of multi-hundreds tunable wavelength channels in fiber optic telecommunications.Computational Technologies in Electrical and Electronics Engineering (SIBIRCON), 2010 IEEE Region 8 International Conference on; 01/2010
Conference Paper: Recent research in public health surveillance and health management[Show abstract] [Hide abstract]
ABSTRACT: While the challenges of the next pandemic outbreak are overwhelming, either from swine flu, other infectious disease, bioterrorism, timely detection of disease outbreaks is most important for public health surveillance and society safety and stability. In public health surveillance, the objective is to systematically collect, analyze, and interpret public health data (chronic or infectious diseases) in order to understand trends, to detect changes in disease incidence and death rates, and to plan, implement, and evaluate public health practice. Recently much research has been conducted to develop methods and algorithms for health surveillance and disease detection. This paper presents an overview and reviews the recent research methods on temporal and spatiotemporal surveillance. Specific research challenges and future research directions are discussed. A real life example is used to compare the performance of three currently used surveillance methods, scan, EWMA, and CUSUM.Prognostics and Health Management Conference, 2010. PHM '10.; 02/2010