A high-speed optical transmission experiment was successfully demonstrated
in an ultra low-loss polarisation maintaining photonic crystal fibre. The f
ibre loss and modal birefringence at 1550 nm were 1.3 dB/km and 1.4 x 10(-3
), respectively. A 10 Gbit/s bi-directional optical signal was successfully
transmitted through the 1.5 km fibre.