1. T.L. Singal, Optical Fiber Communications: Principles and Applications (Cambridge University Press, Cambridge, 2017)
2. B. Bouzid, Erbium Doped Fiber Laser and Amplifier. Opt. Photon. J. 2014, 1 (2014)
3. I. Kaur, N. Gupta, Hybrid Fiber Amplifier, vol. 21 (IntechOpen, London, 2012)
4. H. Masuda, S. Kawai, Wide-band and gain-flattened hybrid fiber amplifier consisting of an EDFA and a multiwavelength pumped Raman amplifier. IEEE Photon. Technol. Lett. 11, 647–649 (2016)
5. M.H. Ali, F. Abdullah, M.Z. Jamaludin, M.H. Al-Mansoori, A.K. Abass, T.F. Al-Mashhadani, Effect of cascading amplification stages on the performance of serial hybrid fiber amplifier. Fiber Integr. Opt. 34, 157–170 (1999)