QPSK transmission over 352.8 km SMF using random DFB fiber laser amplification . Brillouin fiber amplifier has a very narrow spectral bandwidth 50MHz and it can be used for channel selection within a WDM system. Experimental investigations of 10118 Gbits DPQPSK WDM transmission using three types of distributed Raman amplification techniques are presented. To overcome the limitations imposed by electrical regeneration a means of optical amplification was sought.
Novel ultralong Raman fibre laser based amplification with . The optical amplification is distributed along the transmission line. Tan M Rosa P Le ST Iqbal MA Phillips ID Harper P.