11 November 2008 Simultaneous transmission of high-speed point-to-point data and double broadcast services in a WDM-PON system with source-free ONUs
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Proceedings Volume 7136, Optical Transmission, Switching, and Subsystems VI; 71360S (2008) https://doi.org/10.1117/12.803587
Event: Asia-Pacific Optical Communications, 2008, Hangzhou, China
Abstract
We propose that double broadcast services can be overlaid over high-speed point-to-point downlink data in a WDMPON with source-free optical network units (ONUs). In the optical line terminal (OLT), a set of single-drive Mach- Zehnder modulators (MZMs) are driven by downlink point-to-point data to generate a differential phase-shift keying (DPSK) format. The downlink DPSK signals from different wavelengths are multiplexed and then fed to a following dual-parallel MZM (DPMZM) as a double broadcast services transmitter. The broadcast service_1 is an optical carrier suppression (OCS) format, while the broadcast service_2 is an inverse return-to-zero (IRZ) forma. After the transmission, at each ONU, the optical signals are separated by an optical filter. The filtered OCS signal is detected to retrieve the broadcast service_1. The DPSK/IRZ signals are split into three parts, one part is detected by an IRZ receiver to recover the broadcast service_2, the second part is detected by a DPSK receiver to retrieve the downlink data and the third part is re-modulated by the upstream amplitude shift keying (ASK). We also perform an experiment to verify the feasibility of the proposed scheme, where the power penalties of less than 1.5 dB are obtained after 25-km transmission with 1.25- Gb/s data rate.
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Qingjiang Chang, Qingjiang Chang, Mingfang Huang, Mingfang Huang, Yikai Su, Yikai Su, } "Simultaneous transmission of high-speed point-to-point data and double broadcast services in a WDM-PON system with source-free ONUs", Proc. SPIE 7136, Optical Transmission, Switching, and Subsystems VI, 71360S (11 November 2008); doi: 10.1117/12.803587; https://doi.org/10.1117/12.803587
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