MMIC tuned front-end for a coherent optical receiver

A low-noise transformer tuned optical front-end for a coherent optical receiver is described. The front-end is based on a GaInAs/InP p-i-n photodiode and a full custom designed GaAs monolithic microwave integrated circuit (MMIC). The measured equivalent input noise current density is between 5-16 pA/ square root Hz in the frequency range 5-14 GHz.<
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