1. Erbium Doped Fiber Amplifiers, Principles and Application;Desurvire,1994
2. Coherent Optical Fiber Communications;Okoshi,1988
3. Characterization of Erbium-Doped Fiber Amplifiers;Derrickson,1998
4. The proper definition of noise figure of optical amplifiers;Haus,1999
5. Fiber-Optic Communications Systems;Agrawal,1997