Washington, DC--At the 2014 OFC Conference and Exposition being held March 9-13 in San Francisco, researcher Dan Kuchta of the IBM T.J. Watson Research Center in New York will describe how IBM researchers set a new record for data transmission over a multimode optical fiber, demonstrating that the existing technology for sending data over short distances should be able to meet the growing needs of servers, data centers, and supercomputers through the end of this decade. Sending data at a rate of 64 gigabits per second (Gbps) over a cable 57 m long using a vertical-cavity surface-emitting laser (VCSEL), the researchers achieved a rate that was about 14% faster than the previous record and about 2.5 times faster than the capabilities of today's typical commercial communications technology. To send the data, the researchers used standard non-return-to-zero (NRZ) modulation. "Others have thought that this modulation wouldn't allow for transfer rates much faster than 32 Gb/s," said Kuchta. Many researchers thought that achieving higher transmission rates would require turning to more complex types of modulation, such as pulse-amplitude modulation-4 (PAM-4).