Novel WDM-PON Architecture for Simultaneous Transmission of Unicast Data and Multicast Services
نویسندگان
چکیده
We propose a novel WDM-PON to simultaneously transmit unicast data and multicast services with upstream data re-modulation in optical network units (ONUs). In the optical line terminal (OLT), for each wavelength channel, the downstream unicast data is applied to one arm of a dual-parallel Mach-Zehnder modulator (DPMZM), to generate baseband unicast non-return-to-zero (NRZ) signal, while a radio frequency (RF) control signal is applied to other arm of a DPMZM to present two un-modulated sidebands for multicast data modulation in differential-phase-shift keying (DPSK) format. By simply switching on/off the RF control signal, the flexible and dynamic multicast services are realized. The proposed scheme is experimentally demonstrate with 1.25-Gb/s downstream unicast, multicast and upstream data. OCIS codes: (060.4255) Networks, multicast; (060.4510) Optical
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