A. K. Srivastava, Y. Sun, J. L. Zyskind, J. W. Sulhoff, T. A. Strasser, C. Wolf, and J. R. Pedrazzani, "Signal power transients in optically amplified WDM ring networks,"
in Optical Fiber Communication Conference,
Vol. 2 of 1998 OSA Technical Digest Series
(Optical Society of America, 1998), paper WJ3.