In wavelength-division-multiplexing systems with optical amplifiers, channel drop or add can cause power changes in the existing channels. We present an analytical formula for the transient power of the existing channels as a function of time when one or more input channel is dropped or added on an erbium-doped fiber amplifier (EDFA). Although this formula was originally derived from perturbation theory of single-stage EDFA’s, it is a good approximation of large-power excursion cases as well as two-stage EDFA’s.
© 1999 Optical Society of America
(060.2320) Fiber optics and optical communications : Fiber optics amplifiers and oscillators
(060.2330) Fiber optics and optical communications : Fiber optics communications
(060.2360) Fiber optics and optical communications : Fiber optics links and subsystems
Yan Sun, John L. Zyskind, Atul K. Srivastava, and Liyan Zhang, "Analytical Formula for the Transient Response of Erbium-Doped Fiber Amplifiers," Appl. Opt. 38, 1682-1685 (1999)