Results 261 to 270 of about 409,995 (301)

Losses at corner bends in dielectric waveguides

Applied Optics, 1977
An approximate technique based on a sum rule is used to treat mode conversion at corner bends in dielectric waveguides. Matrix elements which describe the mode coupling are expressed as spatial integrals over electromagnetic field distributions for the guided modes.
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Bend loss in single-mode fibers

Journal of Lightwave Technology, 1997
In this paper, we present the results of extensive single-radius bend loss measurements for two different fibers over wide ranges of wavelength (800-1600 nm) and curvature radius (13.5-27.5 mm). A new bend loss formula is also derived, allowing a good fit of experimental data over the whole range of both parameters. Using an equivalent step-index (ESI)
FAUSTINI L, MARTINI, GIUSEPPE
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Bending-induced loss in dual-mode rectangular waveguides

Optics Letters, 1994
We examine how the bending-induced mode losses in a dual-mode rectangular-core waveguide vary with bend orientation. Bending about the minor axis [case (i)] and bending about the major axis [case (ii)] are considered. The second (LP(11)) mode is more lossy in case (i) than in case (ii), while the reverse is true for the first (LP(01)) mode. Further, in
A, Kumar, R L, Gallawa
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Bending and coupling losses in terahertz wire waveguides

Optics Letters, 2010
We present an experimental study of several common perturbations of wire waveguides for terahertz pulses. Sommerfeld waves retain significant signal strength and bandwidth even with large gaps in the wire, exhibiting more efficient recoupling at higher frequencies. We also describe a detailed study of bending losses.
Victoria, Astley, Julianna, Scheiman, Rajind, Mendis, Daniel M, Mittleman   +3 more
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WKB Analysis of Bend Losses in Optical Waveguides

Integrated Photonics Research, 1999
A more complete Wentzel-Kramers-Brillouin (WKB) analysis of bend losses is given for a circularly curved waveguide. Using the WKB approximation with a conformal transformation of a curved optical waveguide, is shown to give more accurate bend loss results.
W. Berglund, A. Gopinath
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Modeling bending losses of optical nanofibers or nanowires

Applied Optics, 2009
Bending losses of nanofibers or nanowires with circular 90 degrees bends are simulated using a three-dimensional finite-difference time-domain (3D-FDTD) method. Dependences of bending losses on wavelength and polarization of guided light are investigated, as well as the diameters, refractive indices, and bending radii of nanowires.
Huakang, Yu, Shanshan, Wang, Jian, Fu, Min, Qiu, Yuhang, Li, Fuxing, Gu, Limin, Tong   +6 more
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Comparison of bending losses in integrated optical circuits

Optics Letters, 1980
We present measured losses in waveguide sections that are caused by connecting two parallel noncollinear straight waveguides and compare the results with theory. Two different offset transitions are considered, one composed of a straight section with sharp corner bends and the other exhibiting a smooth S-shaped transition.
L D, Hutcheson, I A, White, J J, Burke
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Bend losses in drop inlet spillways

Canadian Journal of Civil Engineering, 1983
The drop inlet spillway consists of a vertical riser open at the top and connected to a horizontal conduit or tunnel at the bottom. A 90° change in direction is required at the connection between the riser and the conduit. In the interests of simplicity a square bend, sometimes called a miter bend, is often used for small unimportant structures.
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Holey Fibers for Low Bending Loss

IEICE Transactions on Electronics, 2006
We have developed a novel type of holey fiber which has a conventional raised-index core surrounded by two layers of air holes with different sizes. The fiber has single-mode operation and shows a low bending loss even for an extremely small bending diameter and a low splicing loss for fusion splicing to a conventional single-mode fiber.
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Low loss dielectric optical waveguide bends

Fiber and Integrated Optics, 1982
Abstract The pure bend loss of a curved dielectric optical waveguide can be reduced effectively with only a slight change in the transverse field distribution by replacing the cladding material outside the caustic by another material with a smaller refractive index. This is demonstrated by microwave model experiments.
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