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DP DQPSK Optical Access System Integrated with Fiber and Free Space Downlink for High Spectral Efficiency Application

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Figure

Figure 1. Optical access system with fiber and FSO downlink (OLT: optical line terminal; SMF: single mode fiber; ONU: optical network unit)
Table 1. Optical fiber parameters.
Figure 5. Q factors v/s bit period for data1 or data2 of DP-DQPSK signals.
Figure 6. Received power versus BER after detecting DP-DQPSK signals.

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