Abstract
The simultaneous transmission of four orthogonal frequency-division multiplexing (OFDM)-based signals used to provide quintuple-play services along wavelength division multiplexing (WDM) long-reach passive optical networks (LR-PONs) is demonstrated experimentally. Particularly, the transmission performance of custom signal bearing Gigabit Ethernet data, Worldwide Interoperability for Microwave Access, Long Term Evolution and Ultra Wideband (sub-bands 2 and 3) signals is evaluated for different LR-PONs reaches, considering single-wavelength and WDM transmission, and using a centralized impairment compensation technique at the central office that is transparent to the services provided.It is shown that error vector magnitude-compliant levels are obtained for all the OFDM-based signals in WDM LR-PONs reaching 100 km and that negligible inter-channel crosstalk is obtained for a channel spacing of 100 GHz regardless the OFDM-based signal considered. The successful multi-format OFDM transmission along the 100 km-long WDM LR-PON is achieved in the absence of optical dispersion compensation or single sideband modulation, and it is enabled by the performance improvement provided by the centralized impairment compensation realized.
Highlights
The integration of wireless and optical access networks in a single hybrid network has been identified as a powerful solution to address the dramatic demand increase for high data-rate wireless connectivity experienced along the last years [1,2,3]
The performance of the different orthogonal frequency-division multiplexing (OFDM)-based signals carried along the wavelength division multiplexing (WDM) long-reach passive optical networks (LR-PONs) depicted in Fig. 1 and employing the centralized compensation described in section 3 is evaluated experimentally
The goal of this work is to verify if the quality of the bundle of OFDM-signals coexisting in the WDM LR-PON after optical transmission along the integrated wired-wireless network is still acceptable
Summary
The integration of wireless and optical access networks in a single hybrid network has been identified as a powerful solution to address the dramatic demand increase for high data-rate wireless connectivity experienced along the last years [1,2,3]. This integrated network provides high flexibility, large coverage area and high data-rates in a simple and cost-effective way. The full integration of the wireless and optical access networks can still be further exploited if the modulation formats of the signals used to transmit the wireless and wired services present similar features. The transmission of OFDM signals in optical fiber communication systems has been appointed for long-haul, metro and access networks [12,13,14,15,16,17]
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