11 GHz ultrawide-bandwidth monolithic photoreceiver using InGaAs pin PD and InAlAs/InGaAs HEMTs

摘要

A very-wide-bandwidth long-wavelength monolithically integrated photoreceiver is presented which comprises an InGaAs pin PD and a transimpedance amplifier. The receiver uses epilayers grown by one-step MOVPE. The InGaAs channel high-electron-mobility field effect transistor (HEMT) employs an Si planar-doped carrier supplying layer to obtain larger transconductance and uniform threshold voltage. The 0.5 mu m gate length is used for HEMTs to enhance the speed of operation. This receiver shows a very wide bandwidth of 11 GHz, and opened eye for a 15 Gbit/s NRZ signal. This is the first demonstration of a long-wavelength monolithic photoreceiver receiving a 15 Gbit/s light signal.