Telecom-equipment maker Ciena Corp. said profit in its latest quarter jumped, though revenue unexpectedly edged lower because of certain customers' network-implementation timing. Separately on Thursday, the company named Francois Locoh-Donou as its new chief operating officer, effective Nov. 1. Mr. Locoh-Donou joined Ciena in 2002 and most recently served as senior vice president of the global products group.