Novel directions in Raman amplifier research

Raman amplifiers provide a simple and yet powerful platform for optical amplification needs in modern optical communication networks. This paper reviews recent progress in Raman amplifier research and highlights some non-conventional future of the field. Although the low-noise and wavelength-independent gain properties of Raman amplifiers have been long exploited in optical communication networks, researchers strive to tap into the huge potential of non-linear optics to improve reach and performance. Alternative approaches used to enhance the quality of Raman amplified networks such as the use of novel pumping schemes that can ensure uniformity in gain and noise performance are discussed. Finally, the advances in research on Raman amplification in monolithically integrated silicon waveguides which should fuel wide deployment in the coming years are presented.