Photoreceiver module using an InP HEMT transimpedance amplifier for over 40 gb/s

We developed a photoreceiver module for over 40 Gb/s that uses two ultrahigh- speed device technologies: an InP HEMT transimpedance amplifier (TIA) and a uni-traveling-carrier photodiode (UTC-PD). The TIA was designed to have a wide dynamic range by using cascade HEMT topology for the output buffer. We found that reducing the standing wave at the PD-TIA interface by decreasing the change of arg(S/sub 11/) of the TIA within the required frequency region is important for increasing the bandwidth of the module. We obtained a minimum sensitivity of -7.6 dBm and a dynamic range of 11 dB for 43-Gb/s nonreturn-to-zero optical input signal. Error-free operation of the module was confirmed at a data rate of 50 Gb/s.