K. Sekine et al., 10-GBIT S 4-CHANNEL WAVELENGTH-DIVISION AND POLARIZATION-DIVISION MULTIPLEXING TRANSMISSION OVER 340-KM WITH 0.5-NM CHANNEL SPACING/, Electronics Letters, 31(1), 1995, pp. 49-50
The authors propose a novel WDM transmission technique combined with p
olarisation-division multiplexing (PDM) which doubles the frequency ut
ilisation efficiency. This technique is used to transmit a 10Gbit/s fo
ur-channel WDM signal with 0.5nm channel spacing over 340 km and the s
ignal is demultiplexed using an optical filter having 0.5nm FWHM and a
polarisation beamsplitter.