Y. K. Chen, S. K. Liaw, W. Y. Guo, S. Chi, and W. H. Cheng, "Multiwavelength optical power-limiting amplifier and its applications in a SONET WDM self-healing ring network,"
in Conference on Lasers and Electro-Optics, J. Bowers, D. Miller, D. Scifres, and A. Weiner, eds.,
Vol. 9 of OSA Technical Digest
(Optical Society of America, 1996), paper CTuU7.