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/√Hz in the frequency range 5-14 GHz
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机译：描述了一种用于相干光接收机的低噪声变压器调谐的光前端。前端基于GaInAs / InP p-i-n光电二极管和完全定制设计的GaAs单片微波集成电路（MMIC）。在5-14 GHz频率范围内测得的等效输入噪声电流密度在5-16 pA /√Hz之间
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