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10Gb/s bi-directional symmetric WDM-PON system based on POLMUX technique with polarization insensitive ONU

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Microsoft Word - OFC 2010_v3.doc 10Gb/s Bi-directional Symmetric WDM-PON System based on POLMUX Technique with Polarization Insensitive ONU Hyun-Do Jung, Nguyen-Cac Tran, Chigo Okonkwo, Eduward Tangdiongga, and Ton Koonen COBRA Research Institute, Eindhoven University of Technology, 5600 MB Eindhoven, The Netherlands E-mail: [email protected] Abstract: We demonstrated 10Gb/s bi-directional symmetric transmission based on polarization- division multiplexing with a centralized light source. One of two orthogonal polarization states carries downstream data while the other un-modulated state is used for upstream modulation. 2010 Optical Society of America OCIS codes: (060.4510 ) Optical communications; (060.4250 ) Networks 1. Introduction Future access networks have to meet the people’s demand for high-quality broadband services. Wavelength- division multiplexing passive optical networks (WDM-PONs) employing centralized light sources and reflective, wavelength-insensitive modulators at the optical network units (ONUs) are promising candidates to meet these demands due to its ease of upgradability and high capacity. The advantage of this configuration is that wavelength referencing and control are provided by centrally generated continuous-wave (CW) carriers instead of wavelength- specific or wavelength-tunable sources at the cost-sensitive ONU. So far, several researches [1-3] have been reported for this configuration. The injection locked FP-LD [1] is attractive because of its wavelength self-management characteristics. However, the transmission performance depends on the wavelength detuning between the injected sliced ASE and a lasing mode of the LD. For a cost- effective and colorless transmitter at the ONU, the use of R(eflective)-SOAs provides several advantages. However, its modulation speed is limited at 2.5Gb/s and it needs a special modulation technique [2] to share the downstream optical signal for the uplink. Recently, a reflective transmitter w

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