Relevant bibliographies by topics / Curved Waveguide Theory

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  1. Journal articles
  2. Dissertations / Theses
  3. Book chapters
  4. Conference papers

Academic literature on the topic 'Curved Waveguide Theory'

Author: Grafiati
Published: 4 June 2021
Last updated: 6 September 2023

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Journal articles on the topic "Curved Waveguide Theory"

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Gravesen, Jens, and Morten Willatzen. "Quantum Eigenstates of Curved and Varying Cross-Sectional Waveguides." Applied Sciences 10, no. 20 (2020): 7240. http://dx.doi.org/10.3390/app10207240.

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A simple one-dimensional differential equation in the centerline coordinate of an arbitrarily curved quantum waveguide with a varying cross section is derived using a combination of differential geometry and perturbation theory. The model can tackle curved quantum waveguides with a cross-sectional shape and dimensions that vary along the axis. The present analysis generalizes previous models that are restricted to either straight waveguides with a varying cross-section or curved waveguides, where the shape and dimensions of the cross section are fixed. We carry out full 2D wave simulations on
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Liu, Wei, Hechao Liu, Xiaohong Sun, and Fan Zhang. "The Design of Large Curved Waveguide Based on Sunflower Graded Photonic Crystal." Photonics 10, no. 7 (2023): 781. http://dx.doi.org/10.3390/photonics10070781.

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In this paper, three large curved waveguides based on Sunflower Graded photonic crystal are designed. Numerical simulations of electromagnetic beam bending in Sunflower Graded photonic crystals have shown that homogenization based on the Maxwell–Garnett theory gives very good results for steering the electromagnetic field. In contrast to the progressive bending waveguide structures based on periodic photonic crystal designs reported in the literature, this structure is not only simple in design, but also the optical wave trends in the progressive bending waveguide structures are more smooth. S
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Perrey-Debain, Emmanuel, and I. David Abrahams. "TE Mode Mixing Dynamics in Curved Multimode Optical Waveguides." Communications in Computational Physics 11, no. 2 (2012): 525–40. http://dx.doi.org/10.4208/cicp.211209.200710s.

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AbstractPropagation of light through curved graded index optical waveguides supporting an arbitrary high number of modes is investigated. The discussion is restricted to optical wave fields which are well confined within the core region and losses through radiation are neglected. Using coupled mode theory formalism, two new forms for the propagation kernel for the transverse electric (TE) wave as it travels along a curved two-dimensional waveguide are presented. One form, involving the notion of “bend” modes, is shown to be attractive from a computational point of view as it allows an efficien
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Nazarov, S. A. "Trapping of a wave in a curved cylindrical acoustic waveguide with constant cross-section." St. Petersburg Mathematical Journal 31, no. 5 (2020): 865–85. http://dx.doi.org/10.1090/spmj/1626.

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Qian, Jingyuan, Yating Wu, Asad Saleem, and Guoxin Zheng. "Path Loss Model for 3.5 GHz and 5.6 GHz Bands in Cascaded Tunnel Environments." Sensors 22, no. 12 (2022): 4524. http://dx.doi.org/10.3390/s22124524.

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An important and typical scenario of radio propagation in a railway or subway tunnel environment is the cascaded straight and curved tunnel. In this paper, we propose a joint path loss model for cascaded tunnels at 3.5 GHz and 5.6 GHz frequency bands. By combining the waveguide mode theory and the method of shooting and bouncing ray (SBR), it is found that the curvature of tunnels introduces an extra loss in the far-field region, which can be modeled as a linear function of the propagation distance of the signal in the curved tunnel. The channel of the cascaded straight and curved tunnel is th
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Sorzia, A. "Floquet Theory for Discontinuously Supported Waveguides." Modelling and Simulation in Engineering 2016 (2016): 1–7. http://dx.doi.org/10.1155/2016/2651953.

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We apply Floquet theory of periodic coefficient second-order ODEs to an elastic waveguide. The waveguide is modeled as a uniform elastic string periodically supported by a discontinuous Winkler elastic foundation and, as a result, a Hill equation is found. The fundamental solutions, the stability regions, and the dispersion curves are determined and then plotted. An asymptotic approximation to the dispersion curve is also given. It is further shown that the end points of the band gap structure correspond to periodic and semiperiodic solutions of the Hill equation.
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Semenova, O. R., A. V. Sosunov, and А. I. Churakova. "Modelling of the X-ray diffraction curves from the proton-exchange layers of a lithium niobate monocrystal." Вестник Пермского университета. Физика, no. 4 (2020): 17–28. http://dx.doi.org/10.17072/1994-3598-2020-4-17-28.

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In this work, within the framework of the dynamic theory of the X-ray scattering, a model is constructed that describes the diffraction reflection curves obtained from the proton-exchange layers of a lithium niobate monocrystal subjected to the post-exchange annealing. Planar proton-exchange waveguides based on the X-cut of the lithium niobate monocrystal are obtained experimentally. It was shown that the proton implantation leads to the formation of the new crystalline phases with a larger lattice parameter. The structure changes (by the method of the diffraction structural analysis) and the
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COBELLI, P. J., V. PAGNEUX, A. MAUREL, and P. PETITJEANS. "Experimental study on water-wave trapped modes." Journal of Fluid Mechanics 666 (January 6, 2011): 445–76. http://dx.doi.org/10.1017/s0022112010004222.

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We present an experimental study on the trapped modes occurring around a vertical surface-piercing circular cylinder of radius a placed symmetrically between the parallel walls of a long but finite water waveguide of width 2d. A wavemaker placed near the entrance of the waveguide is used to force an asymmetric perturbation into the guide, and the free-surface deformation field is measured using a global single-shot optical profilometric technique. In this configuration, several values of the aspect ratio a/d were explored for a range of driving frequencies below the waveguide's cutoff. Decompo
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Subhani, Mahbube, Jian Chun Li, Hauke Gravenkamp, and Bijan Samali. "Effect of Elastic Modulus and Poisson's Ratio on Guided Wave Dispersion Using Transversely Isotropic Material Modelling." Advanced Materials Research 778 (September 2013): 303–11. http://dx.doi.org/10.4028/www.scientific.net/amr.778.303.

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Timber poles are commonly used for telecommunication and power distribution networks, wharves or jetties, piling or as a substructure of short span bridges. Most of the available techniques currently used for non-destructive testing (NDT) of timber structures are based on one-dimensional wave theory. If it is essential to detect small sized damage, it becomes necessary to consider guided wave (GW) propagation as the behaviour of different propagating modes cannot be represented by one-dimensional approximations. However, due to the orthotropic material properties of timber, the modelling of gu
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Zhang, Meiling, Jiao Yin, Zhixu Jia та ін. "Gain Characteristics of Polymer Waveguide Amplifiers Based on NaYF4:Yb3+, Er3+ Nanocrystals at 0.54 μm Wavelength". Journal of Nanoscience and Nanotechnology 16, № 4 (2016): 3564–69. http://dx.doi.org/10.1166/jnn.2016.11864.

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Gain characteristics of polymer waveguide amplifiers based on NaYF4:Yb3+, Er3+ nanocrystals (NCs) at 0.54 μm wavelength were investigated through numerical simulations. NaYF4:18%Yb3+, 10%Er3+ NCs were doped into SU-8 2005 polymer matrix as the core of a polymer waveguide. The absorption spectrum and photoluminescence spectrum of the NCs were recorded and analyzed. The Judd-Ofelt parameters were achieved by means of Judd-Ofelt theory: Ω2 = 6.302×10−20 cm2, Ω4 = 0.69×10−20 cm2, Ω6 = 7.572×10−20 cm2. We simulated the gain characteristics of the waveguide amplifier at 0.54 μm wavelength by combini
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Dissertations / Theses on the topic "Curved Waveguide Theory"

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Honnungar, Rajini V. "Design and Analysis of Integrated Optic Waveguide Delay Line Phase Shifters for Microwave Photonic Application." Thesis, 2013. http://etd.iisc.ac.in/handle/2005/3438.

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Microwave Photonics(MWP) has been defined as the study of photonic devices which operate at microwave frequencies and also their applications to microwave and optical systems. One or more electrical signals at microwave frequencies are transported over the optic link ,with electrical to optical and optical to electrical conversion on the transmission and receiving side respectively. The key advantages of microwave photonic links over conventional electrical transmission systems such as coaxial cables or waveguides ,includes reduced size, weight and cost, immunity to electromagnetic interferenc
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Honnungar, Rajini V. "Design and Analysis of Integrated Optic Waveguide Delay Line Phase Shifters for Microwave Photonic Application." Thesis, 2013. http://etd.iisc.ernet.in/2005/3438.

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Microwave Photonics(MWP) has been defined as the study of photonic devices which operate at microwave frequencies and also their applications to microwave and optical systems. One or more electrical signals at microwave frequencies are transported over the optic link ,with electrical to optical and optical to electrical conversion on the transmission and receiving side respectively. The key advantages of microwave photonic links over conventional electrical transmission systems such as coaxial cables or waveguides ,includes reduced size, weight and cost, immunity to electromagnetic interferenc
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Book chapters on the topic "Curved Waveguide Theory"

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Wood, Alastair D. "Exponential Asymptotics and Spectral Theory for Curved Optical Waveguides." In Asymptotics beyond All Orders. Springer US, 1991. http://dx.doi.org/10.1007/978-1-4757-0435-8_25.

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Xia, Jian-Bai, and Duan-Yang Liu. "1D Quantum Waveguide Theory of Rashba Electrons in Curved Circuits." In Quantum Waveguide in Microcircuits, edited by Wei-Dong Sheng. Jenny Stanford Publishing, 2017. http://dx.doi.org/10.1201/9781315364773-15.

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Conference papers on the topic "Curved Waveguide Theory"

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Lin Li, Qunsheng Cao, and Binyan Yao. "Analysis of curved waveguide structures using the MPSTD algorithm." In 2008 8th International Symposium on Antennas, Propagation and EM Theory. IEEE, 2008. http://dx.doi.org/10.1109/isape.2008.4735302.

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Griffin, Devon W., and Laura A. Weller-Brophy. "Polarization properties of focusing grating couplers." In OSA Annual Meeting. Optica Publishing Group, 1989. http://dx.doi.org/10.1364/oam.1989.tull2.

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A focusing grating coupler consists of a chirped, curved grating on the surface of a dielectric waveguiding structure. Due to the geometry of the grating rulings, such a coupler can convert a guided waveguide mode to a radiation mode having a point focus above or below the plane of the waveguide. Such focusing couplers have been proposed as the central coupling and focusing elements in CD ROMS and magnetooptic disk drives. In spite of these applications, little detailed study of their polarization properties has been presented in the literature. In this presentation we discuss the polarization
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Tomaru, Satoru, Koji Enbutsu, Makoto Hikita, et al. "Application of UV Cured Epoxy Resin to Polymeric Optical Waveguide Components." In Organic Thin Films for Photonic Applications. Optica Publishing Group, 1997. http://dx.doi.org/10.1364/otfa.1997.fb.5.

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Many polymeric optical waveguides have been studied for use in the field of optical interconnection [1-3] because they offer such advantages as routing flexibility, process compatibility with electronic devices, and mass productivity. In particular, their application to multimode optical waveguide devices in the 0.85 µm wavelength region is attractive because polymeric materials generally have low loss. We have already realized polymeric multimode optical devices for optical interconnection[4,5].
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Okayama, H., T. Ushikubo, and M. Kawahara. "Reduction of the Voltage-Length Product for a Y-branch Digital Optical Switch." In Photonic Switching. Optica Publishing Group, 1991. http://dx.doi.org/10.1364/phs.1991.fb2.

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The waveguide type optical switches which operate through modal evolution have attracted much attention by their digital response against applied voltage [1]. The most basic form of this switch is the Y-branch optical switch. Most of the devices reported used straight waveguides to form the Y-branch. Some devices with curved waveguides (shaped branch) were reported recently [2][3]. However, the structure was optimized only for a specific drive voltage and crosstalk. In this report we propose structures which are optimized for a wide range of drive voltages.
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Eger, D., M. A. Arbore, M. M. Fejer, and M. L. Bortz. "Two-color Photorefractivity in LiNbO3 Waveguides." In Nonlinear Optics: Materials, Fundamentals and Applications. Optica Publishing Group, 1996. http://dx.doi.org/10.1364/nlo.1996.ntua.7.

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Short wavelength coherent light sources are required for applications such as process monitors and fluorescence based instruments. QPM waveguides can be used to frequency double GaAlAs diode laser output for this purpose. However the efficiency of chemically poled waveguides of different ferroelectric crystals such as LiNbC3, LiTaO3 and KTiOPO4 degrade as the generated wavelength approaches the UV spectral range. The degradation is characterized by a decrease in the peak doubling efficiency, broadening of the QPM curve and reduction in the IR transmissivity of the waveguide. The damage increas
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Longhi, S., D. Janner, M. Marangom, and P. Laporta. "Quantum mechanics in periodically curved optical waveguides." In Nonlinear Guided Waves and Their Applications. OSA, 2004. http://dx.doi.org/10.1364/nlgw.2004.mc25.

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Hill, C. A., R. M. Jenkins, and R. W. J. Devereux. "Theory Of CO 2 Laser Transmission Through Curved Hollow Dielectric Waveguides." In Hague International Symposium, edited by V. G. Roper. SPIE, 1987. http://dx.doi.org/10.1117/12.941399.

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Cheng, Yuehua, and Weigan Lin. "Generalized coupled-mode formulations for two curved weakly guiding single-mode fibers." In OSA Annual Meeting. Optica Publishing Group, 1988. http://dx.doi.org/10.1364/oam.1988.md7.

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A generalized coupled-mode theory1 is developed to study the coupling system of two curved weakly guiding single-mode fibers. Our theory takes into account the local fields, nonorthogonality, and phase interference between guide modes in the curved optical waveguides. In similar special cases, the coupling mode formulations and coupling coefficients1 agree with those obtained from the Hardy-Streifer coupled-mode theory.2
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Yang, Allen H. J., Bradley Schmidt, Sudeep Mandal, Michal Lipson, and David Erickson. "Optofluidic Transport: Optical Waveguides as Microfluidic “Train Tracks”." In ASME 2007 International Mechanical Engineering Congress and Exposition. ASMEDC, 2007. http://dx.doi.org/10.1115/imece2007-41787.

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In this work we demonstrate optofluidic [1] transport and trapping of dielectric particles using the intense electromagnetic energy in the evanescent field of optically excited microphotonic waveguides. A conceptual overview of the transport mechanism is presented along with the detailed optofluidic theory which describes the transport. Experimental results for straight and curved waveguides are presented along with details of our experimental technique. The final section details our recent work on developing a stability condition for this form of transport.
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McCaughan, Leon, and Kent D. Choquette. "Origin and solution of finite extinction ratios in Ti:LiNbO3 directional coupler switches." In Integrated and Guided Wave Optics. Optica Publishing Group, 1986. http://dx.doi.org/10.1364/igwo.1986.thbb6.

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Ti:LiNbO3 directional coupler switches have consistently shown an extinction ratio in the −15 to −30-dB range but only rarely <−30 dB. This is illustrated by a set of 16 nominally identical directional coupler switches recently fabricated on a single substrate.1 An approximately random distribution of extinction ratios was measured ranging from −11.6 to <−35 dB. In addition, their response curves show nonideal behavior, such as unequal side lobes and nonzero voltage values for the maxima of the crossed state. We hypothesize and demonstrate that there is a common explanation for all these
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