A Single Wavelength 25-Gb/s Symmetric FDMA PON

Single-Fiber Lightwave Centralized WDM-OFDMA-PON With Colorless Optical Network Units

“…In the simulations and experiments, we assume a single WDM channel with OFDM modulation and focus on investigating detrimental PON impairments. The allocation of the resources to multiple users have been studied in previous demonstrations [14].…”

“…Thus, WDM-OFDMA-PON, combining the key advantages of the two strategies, is emerging as a promising solution [5]. All architectures demonstrated in [6]- [14] exploit direct-detection optical OFDM (DDO-OFDM) for downlink (DL) to minimize signal reception cost at ONU. In [6]- [10], the uplink (UL) is also directly detected at optical line terminal (OLT) receivers.…”

“…We demonstrate a symmetrical, single-feeder, lightwave centralized OFDMA-PON using an architecture similar to [14], [15]. In this PON architecture, one sideband of the signal spectrum is devoted to the DL signal while the other sideband is used for UL transmission.…”

“…The proposed PON not only allows spectrally efficient signal transmission, but also enables us to use a single laser per WDM channel at the OLT for both DL and UL, enabling colorless ONUs. In [14], a single-fiber symmetrical 25 Gb/s OFDMA-POM is demonstrated with 20 km fiber length by using a single carrier for UL and DL. The main focus of [14] is power budget discussions and resources allocation for UL and DL.…”

“…In [14], a single-fiber symmetrical 25 Gb/s OFDMA-POM is demonstrated with 20 km fiber length by using a single carrier for UL and DL. The main focus of [14] is power budget discussions and resources allocation for UL and DL. In [15], the potential of the single carrier PON for achieving high UL data rate is experimentally demonstrated by using four WDM channels (32 Gb/s per channel) and real-time digital signal processing (DSP).…”