A 120-Gb/s optical link (12 channels at 10 Gb/s/ch for both a transmitter and a receiver) has been demonstrated. The link operated at a bit-error rate of less than 10^-12 with all channels operating and with a total fiber length of 316 m, which comprises 300 m of next-generation (OM-3) multimode fiber (MMF) plus 16 m of standard-grade MMF. This is the first time that a parallel link with this bandwidth at this per-channel rate has ever been demonstrated. For the transmitter, an SiGe laser driver was combined with a GaAs vertical-cavity surface-emitting laser (VCSEL) array. For the receiver, the signal from a GaAs photodiode array was amplified by a 12-channel SiGe receiver integrated circuit. Key to the demonstration were several custom testing tools, most notably a 12-channel pattern generator. The package is very similar to the commercial parallel modules that are available today, but the per-channel bit rate is three times higher than that for the commercial modules. The new modules demonstrate the possibility of extending the parallel-optical module technology that is available today into a distance-bandwidth product regime that is unattainable for copper cables.
© 2004 IEEE
Daniel M. Kuchta, Young H. Kwark, Christian Schuster, Christian Baks, Chuck Haymes, Jeremy Schaub, Petar Pepeljugoski, Lei Shan, Richard John, Daniel Kucharski, Dennis Rogers, Mark Ritter, Jack Jewell, Luke A. Graham, Karl Schrödinger, Alexander Schild, and Hans-Martin Rein, "120-Gb/s VCSEL-Based Parallel-Optical Interconnect and Custom 120-Gb/s Testing Station," J. Lightwave Technol. 22, 2200- (2004)