Gambling, W.A., Payne, D.N. and Matsumura, H.
Gigahertz bandwidths in multimode, liquid-core, optical fibre waveguides
Optics Communications, 6, (4), . (doi:10.1016/0030-4018(72)90145-9).
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An attenuation of 7 dB/km has been achieved over kilometre lengths of liquid-core, multi-mode optical fibre waveguide. The measured pulse dispersion depends on the mode distribution launched and on mode conversion which is a function of bend radius. Using a laser source a dispersion corresponding to a bandwidth ~ 1 GHz has been achieved and does not appear to be limited by fibre imperfections.
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