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A centrally-controlled self-protected WDM-PON is proposed. It provides downstream 1∶1 and upstream 1+1 protection, respectively. 2.5Gbps bidirectional transmissions under both working and protection modes are demonstrated. The protection switching time is about 2ms.
We propose a novel scheme to realize unicast and multicast in WDM-PON. Unicast data and multicast data are modulated in Amplitude Shift Keying (ASK) format and Differential Phase Shift Keying (DPSK) format respectively. Reflective Semiconductor Optical Amplifier (RSOA) is used to selectively erase the DPSK signal by controlling the optical switch, and multicast is realized.
We propose a novel scheme to overlay multicast service over a wavelength-division-multiplexed (WDM) passive optical network (PON) based on dynamic wavelength reflection scheme. At the optical line terminal (OLT), for each WDM channel, a dynamic wavelength reflector is used to selectively bypass the corresponding optical carrier to avoid multicast data superimposition, while the remaining optical carriers...
A multicast scheme in Wavelength-Division-Multiplexing passive optical network (WDM-PON) is realized by superimposing multicast differential phase shift keying (DPSK) signal onto downstream point-to-point Manchester/NRZ signal. A commercial electrical logic XOR gate is used to produce Manchester signal. The proposed system is experimentally demonstrated with 5-Gb/s point-to-point Manchester/NRZ format...
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