On Wednesday, U.S. stocks saw broad gains in optical communications concept shares. As of the time of this writing, Ciena (CIEN.US) was up more than 9%, Lumentum (LITE.US) rose more than 6%, Coherent (COHR.US) gained more than 4%, Credo Technology (CRDO.US) was up over 5%, and Mavenir Technology (MRVL.US) and Corning (GLW.US) rose over 5%.