CHARLTON, Mass., March 30 -- FiberCore, Inc. says it has completed its Jena, Germany, plant expansion. The expansion more than doubles both preform and fiber capacity. Management expects that this plant expansion will not be sufficient to handle the demand for the Company's product beyond the year 2000, and, therefore, plans to launch another plant expansion during 1999.The Company's high bandwidth multimode fiber products are available in Europe, Asia-Pacific, the Middle East, and Africa, and can support emerging Gigabit Ethernet protocols. Phosphorus-free multimode fiber is available in North America.