Chirped-Pulse Phase-Sensitive Reflectometer Assisted by First-Order Raman Amplification - Pastor-Graells, J.; Nuno, J.; Fernandez-Ruiz, M.R.; Garcia-Ruiz, A.; Martins, H.F.; Martin-Lopez, S.; Gonzalez-Herraez, M. (Journal of Lightwave Technology, 2017)