介紹了一種直流耦合跨阻抗光突發模式接收機。采用前饋式結構，通過快速峰值檢波電路和延時單元的協同工作，使該光突發模式接收機具有：更低的誤碼率、較高的接收靈敏度、又有大的光接收動態范圍；在輸出端采用特殊的或非門技術，消除了干擾。其仿真結果表明：在傳輸速率為1.25 Gb/s，誤碼率BER≤10?9時，接收靈敏度為?24 dBm，最大可接收光功率?4 dBm，動態范圍可高達20 dB，兩分組信號保護時間為20 ns。
關 鍵 詞 突發模式接收機; 峰值檢波; 判決門限; 自適應判決

Abstract In this paper, a novel DC coupled feedforward type optical burst mode receiver is presented.Through the cooperation between the fast peak detector and the delay unit,the receiver is realized with lower BER, bettter receiver sensitivity and receiver dynamic range. The output NOR gate can cancell the unwanted peak in dead spaces between packet signals.The results of the simulation indicate that the receiver sensitivity is ?24 dBm (average power, 10?9BER) at bit rates up to 1.25 Gb/s and the maximum receivable optical average power is ?4 dBm, so the dynamic range is 20 dB. The minimum packet spacing required to properly recover the first bit in the second packet is 20 ns.
Key words burst mode receiver; peak detector; threshold; adaptive decision