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Bend insensitive optical fiber with ultralow bending loss in the visible wavelength band

Optics Letters, 2009
We 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, Seongmin, Ju, Won-Taek, Han +2 more
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Head losses at manholes with a 90° bend

Canadian Journal of Civil Engineering, 1988
Head and pressure changes were studied at manholes with a 90° bend. For pressurized flow, such changes depend only on junction geometry. Among junction parameters, the benching was found particularly important. Full benchings reaching to the pipe crown produced the lowest head losses, particularly when combined with an enlarged pipe diameter at the ...
J. Marsalek, B. J. Greck
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Bending Losses of the Asymmetric Slab Waveguide

Bell System Technical Journal, 1971
The bending losses of the asymmetric slab waveguide are computed. The computation is based on the knowledge of the exact form of the solution of Maxwell's equations of the bent structure and the additional assumption that the field near the bent waveguide can be approximated by the field of the straight waveguide.
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Low-loss bends for integrated optics

Conference on Lasers and Electro-Optics, 1981
V. Ramaswamy, M. Divino
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Micro-Bending Influence on Mode-Dependent Loss