After transmission over 480 km, the OSNR of MPI-R is more than 29 dB,the sensitivity of receiver is about -22.3 dBm at BER=10~(-12).

• 系统传输480km后；MPI R点的光信噪比(OSNR)大于29dB；在误码率(BER)为10-12时；接收机的最小接收功率可达到-22.；3dBm。