Residual shrinkage of UV-cured acrylate-jacketed optical fibres

UV-cured acrylate-jacketed optical fibres and nylon-jacketed optical fibres were heated up to 120°C and their changes in length measured. Experimental results show that residual strain of the acrylate-jacketed fibres is not caused by the temperature change of 20¿120¿20°C, while, for the nylon-jacketed fibres, compressive strain remains after the heat cycle. The strain is proportional to the cross-sectional area of the nylon layer.