The MD-12-B from Optilab is a Optical Modulator Driver with Data Rate Up to 15 Gb/s, Gain 16 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-B can be seen below.