Ws. Lee et A. Hadjifotiou, OPTICAL-TRANSMISSION OVER 140KM AT 40 GBIT S BY OPTICAL-TIME DIVISIONMULTIPLEXING DEMULTIPLEXING/, Electronics Letters, 31(12), 1995, pp. 997-998
Transmission at 40Gbit/s over 140km of dispersion-shifted fibre has be
en demonstrated. An optical sensitivity of -28.5dBm (BER = 10(-9)) was
achieved at the optimum operating wavelength of 1556nm and a power pe
nalty of <1dB was obtained for 1554-1557.5nm wavelengths. The two opti
cally demultiplexed 20Gbit/s channels exhibited negligible difference
in sensitivity.