The MD-20-M from Optilab is a Optical Modulator Driver with Data Rate Up to 23 Gb/s, Gain 19 dB to 24 dB, Rise/Fall Time Rise Time: 35 ps typ., Output Voltage/Amplitude 7.5 Vp-p, Differential/Input Voltage 500 mV to 1.5 V. More details for MD-20-M can be seen below.