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- W2155840747 abstract "A wavelength-selective directional coupler, consisting of two polished single-mode fibers with different cladding refractive indexed, has been fabricated. In contrast to symmetrical couplers, where the power transfer characteristic is a quasiperiodic function of the wavelength, couplers made of dissimilar fibers show a true bandpass-filter characteristic. They consist of two fibers with different core diameters and refractive-index profiles, having the same cladding refractive index. The parameters of the fibers must be chosen in such a way that if their propagation constants beta /sub 1/, beta /sub 2/ are plotted over the wavelength, the curves intersect at a cross-over wavelength lambda /sub 0/ equal to the center wavelength of the filter. The 3-dB bandwidth of the coupler's power transfer characteristic is 13.6 nm, the best value achieved up to now.< <ETX xmlns:mml=http://www.w3.org/1998/Math/MathML xmlns:xlink=http://www.w3.org/1999/xlink>></ETX>" @default.
- W2155840747 created "2016-06-24" @default.
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- W2155840747 date "1990-01-01" @default.
- W2155840747 modified "2023-09-24" @default.
- W2155840747 title "Narrow-band directional couplers made of dissimilar single-mode fibers with different cladding refractive indexes" @default.
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- W2155840747 doi "https://doi.org/10.1109/50.59154" @default.
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