Results 261 to 270 of about 113,140 (299)
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Waveguide-bend configuration with low-loss characteristics
Optics Letters, 1986A structure that can reduce abrupt-bend losses in dielectric optical waveguides is proposed. The structure has a relatively low refractive-index region at the outside of the corner; the region operates as a phase-front accelerator of the propagating mode.
T, Shiina, K, Shiraishi, S, Kawakami
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Bending loss analysis of photonic crystal fibers
2012 20th Signal Processing and Communications Applications Conference (SIU), 2012In this study, the effects of bending on propagation losses of the proposed hexagonal shaped photonic crystal fiber has been investigated by employing the full vectorial finite element method. Bending loss analysis of 60 air hole PCF over wide wavelength range has been reported.
Huseyin Ademgil +2 more
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Modeling bending losses of optical nanofibers or nanowires
Applied Optics, 2009Bending 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 +6 more
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Losses at corner bends in dielectric waveguides
Applied Optics, 1977An 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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Comparison of bending losses in integrated optical circuits
Optics Letters, 1980We 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 loss effects in diffused, buried waveguides
Applied Optics, 2005Bend loss effects can be a significant concern in the design and performance of diffused, buried waveguide devices. Since diffused, buried waveguides typically do not have analytical mode solutions, the bend mode must be expressed as an expansion of straight waveguide modes.
James T A, Carriere +4 more
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WKB Analysis of Bend Losses in Optical Waveguides
Integrated Photonics Research, 1999A 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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Bending and coupling losses in terahertz wire waveguides
Optics Letters, 2010We 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 +3 more
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Bending Losses in Optical Fibers
1991A typical single- or few-mode optical fiber is a thin glass cylinder with an outer diameter of roughly 103 μ. Most of the fiber makes up what is called the cladding, but at its center is an an inner core with a diameter of roughly 10μ containing glass with optical parameters slightly different from that in the cladding [1].
Ann Kahlow Hobbs +2 more
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Bend insensitive optical fiber with ultralow bending loss in the visible wavelength band
Optics Letters, 2009We report experimental development of a single-mode optical fiber optimized for a wavelength band of 400 nm to 700 nm, which showed negligible bending loss of 0.09 dB/loop at 400 nm and 0.23 dB/loop at 633 nm for a loop diameter of 10 mm.
Pramod R, Watekar +2 more
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