Enhanced colorless and broadcast capable symmetrical 10-Gbps bidirectional transmission in WDM-PON using RSOA and EAM

Bidirectional 40Gb/s/λ, 100km-reach, channel-reuse WDM-PON employing tunable optical transceiver with optical intensity detection-based wavelength management

“…Various colorless optical sources have been proposed, including the reflective semiconductor optical amplifier (RSOA) [13,14], the semiconductor optical amplifier-reflective electro-absorption modulator (SOA-REAM) [11,15], and the tunable laser. The tunable laser (or tunable optical transmitter) is an attractive candidate for a colorless optical source for channel-reuse, long-reach, and high-speed transmission as the wavelength of the upstream optical carrier can be set flexibly in the ONU; this can reduce the Rayleigh backscattering noise existing in loopback mode-based wavelength-reuse system [16,17]. However, an automatic wavelength control method is required by the tunable laser-based colorless optical source to realize true colorless operation with plug-and-play features.…”