Laser phase noise and OFDM symbol duration effects on the performance of direct-detection based optical OFDM access network

In this paper, we present numerical and experimental demonstration about the impacts of the laser phase noise in direct-detection based optical orthogonal frequency division multiplexing system for access-network transmission. We analyzed the system performance in the presence of the laser phase noise for various orthogonal frequency division multiplexing symbol durations. A significant phase-noise-effect difference between the access-network and long-haul transmission was verified in terms of the orthogonal frequency division multiplexing symbol duration.

► We investigated the impacts of the laser phase noise in DDO-OFDM for access-network. ► The system performance was analyzed for various OFDM symbol durations. ► These analyses were numerically, experimentally demonstrated. ► A PN-effect difference between the access-network & long-haul range was verified. ►The longer OFDM symbol duration may not be preferred for the better performance.