We describe an analytic method that calculates accurately (within a 1.5-dB discrepancy with numerical models) the gain of an erbium-doped fiber amplifier. Amplified spontaneous emission (ASE) is taken into account so that the gain of ASE-saturated erbium-doped fiber amplifiers is calculated properly. It is effective for wavelength multiplexing (several signals) and for different pumping schemes (copropagating or counterpropagating or both).
© 1992 Optical Society of America
T. Georges and E. Delevaque, "Analytic modeling of high-gain erbium-doped fiber amplifiers," Opt. Lett. 17, 1113-1115 (1992)