1. Department of Electrical and Computer Engineering, University of Massachusetts at Amherst, Knowles Engineering Building, Amherst, MA 01003, USA, Phone: (413) 545-0712, Fax: (413) 545-1993, E-mail: chlamtac@eden.ecs.umass.edu
2. Dipartimento di Elettronica, Politecnico di Torino, Corso Duca degli Abruzzi, 24, 10129 Torino, Italy, Phone: +39-11-5644126 / +39-11-5644145, Fax: +39-11-5644099 / +39-11-5644099, E-mail: fumagalli@polito.it / poggiolini@polito.it
3. Optical Communications Research Laboratory, Stanford University, Durand Building, Room 202, Stanford, CA 94305-4055, USA, Phone: (415) 941-5175, Fax: (415) 723-9251, E-mail: leonid@sierra.stanford.edu