The propagation characters of two-core selective filling photonic liquid crystal fibres

A single fibre-type transformation which has two adjacent cores has been investigated experimentally. One of six air holes near the central core of the index-guide photonic crystal fibre was filled with liquid crystal to half the total fibre length, almost 10 cm. Light power was provided from the opposite end of the crystal fibre. When the temperature was increased from 65 to 80 degrees C, the light power was transmitted from the central solid core into the liquid crystal-filled air hole. The spectra transmitted were from 550 nm to 850 nm, a range of almost 300 nm, but shorter wavelengths could also be included. The light power was concentrated in the central core, and as the heating area was changed it became weaker and then reappeared at the same temperature.