On the architecture and performance of the 1310 nm Raman amplifier

We investigate the architecture and performance of the 1310 nm QD laser based Raman amplifier. In the polarization multiplexed co-propagating configuration we obtained gain up to 9 dB, while it was reduced to 8 dB in the bidirectional configuration. The highest observed gain was in the polarization multiplexed counter-propagating configuration, with the gain over 16 dB.