The MD-12-DC from Optilab is a Optical Modulator Driver with Data Rate Up to 12.5 Gb/s, Gain 14 dB to 26 dB, Rise/Fall Time Rise Time: 35 ps, Output Voltage/Amplitude 7.5 Vp-p, Differential/Input Voltage 500 mV to 1.5 V. More details for MD-12-DC can be seen below.