Low crosstalk polarisation-maintaining optical fibre with an 11 km length

Abstract
An 11 km-long polarisation-maintaining optical fibre with crosstalk up to −25.2 dB and −22.5 dB at 1.30 μm and 1.56 μm, respectively, is presented. Transmission loss is 1.2 dB/km at 1.3 μm and has a minimum value of 0.79 dB/km at 1.56 μm.