نتایج جستجو برای: waveguide design

تعداد نتایج: 974529  

2014
Peter B. Catrysse Victor Liu Shanhui Fan

Waveguide array lenses are waveguide arrays that focus light incident on all waveguides at the input side into a small number of waveguides at the output side. Ideal waveguide array lenses provide complete (100%) power concentration of incident light into a single waveguide. While of great interest for several applications, ideal waveguide array lenses have not been demonstrated for practical a...

2013
Rodrigo Kenji Enjiu Marcelo Bender Perotoni

Slotted waveguide antennas (SWA) are often employed in radar applications where design specifications commonly require high gains and mechanical robustness. Since the peak power transmitted by radar antennas is usually very high, waveguide antennas present a practical alternative to planar arrays. While numerous design references and guidelines exist for planar arrays, there are far fewer for s...

Journal: :JCP 2013
De En Jieyu Feng Ningbo Zhang Ningning Wang Xiaobin Wang

Dual M-Z interferometer is the sensitive element of three-component acceleration seismic geophone, while Y branch waveguide is the basic optical components composed of dual M-Z interferometer, so the design of Y branch waveguide directly affects the performance of threecomponent acceleration seismic geophone. Firstly, branch waveguide and S-shaped bent waveguide are introduced, and symmetrical ...

Journal: :Optics express 2011
Ziran Wu Wei-Ren Ng Michael E Gehm Hao Xin

An all-dielectric THz waveguide has been designed, fabricated and characterized. The design is based on a hollow-core electromagnetic crystal waveguide, and the fabrication is implemented via polymer-jetting rapid prototyping. Measurements of the waveguide power loss factor show good agreement with simulation. As an initial example, a waveguide with propagation loss of 0.03 dB/mm at 105 GHz is ...

Journal: :IEICE Transactions 2011
Koichi Hirayama Yasuhide Tsuji Shintaro Yamasaki Shinji Nishiwaki

We present a design optimization method of H-plane waveguide components, based on the level set method with the finite element method. In this paper, we propose a new formulation for the improvement of a level set function, which describes shape, location, and connectivity of dielectric in a design region. Employing the optimization procedure, we demonstrate that optimized structures of an H-pl...

2009
Koh Hashimoto Jiro Hirokawa Makoto Ando

A post-wall waveguide-fed parallel plate slot array shown in Fig.1 is one of the attractive candidates for high efficiency and mass producible planar array antennas in millimeter-wave applications [1]-[3]. A unit T-junction model with simplified PEC solid-walls was utilized for highspeed design using the method of moments [1]. Unfortunately, the antenna designed by this model was suffered from ...

Journal: :Optics letters 2011
Yueke Wang Dao Hua Zhang Jun Wang Xuefeng Yang Dongdong Li Zhengji Xu

We report the design of microwave waveguide devices based on complementary media. Various kinds of waveguide devices that possess nearly 100% transmission efficiency are proposed, such as waveguide bends, splitters, connectors, and shifters. Compared with previous work on waveguide devices of low reflection and minimized distortion based on transformation optics, our transform media are homogen...

Journal: :Optics express 2014
Wen Qi Zhang M A Lohe Tanya M Monro Paolo Bettotti Lorenzo Pavesi V Shahraam Afshar

We numerically investigate nonlinear self-polarization flipping in a silicon waveguide. We identify specific silicon waveguide geometries that enhance this effect to facilitate its fabrication and experimental demonstration by varying various parameters such as fabrication distortion, waveguide loss, dispersion and laser noise to design the silicon waveguide. In optimized waveguides, we show th...

2012
Qiao Shi Andy Song Thach Nguyen Arnan Mitchell

In this paper, we investigate a real-world problem, constructing optical waveguide structures using evolutionary search strategies. Optical waveguide is the most basic component in optical communication and integrated optical circuits. The structure of a waveguide is of great importance as it would significantly impact on the quality of light transmission. The aim of this paper is to find a set...

Journal: :Optics express 2012
Hyungsuk Ryu Jaehun Kim Young Min Jhon Seok Lee Namkyoo Park

Here we examine the waveguide dispersion property of slot waveguides, approaching/analyzing the given problem with respect to the normalized index contrast, Δnslot-core/ncore and Δncore-clad/ncore between adjacent layers . For two index contrasts of concern, it is found that their contributions to slot waveguide dispersions are substantially different, with Δnslot-core and Δncore-clad each acti...

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