title: Gain-switched multicarrier transmitter in a long-reach UDWDM PON with a digital coherent receiver.
abstract: The authors report on the downlink performance of a 10 Gb/s long-reach and ultra-dense wavelength-division multiplexed passive optical network, based on a multicarrier transmitter realized by using an externally injected gain-switched distributed-feedback laser diode. Each of the comb channels, spaced by 10 GHz, is modulated with a 3 Gbaud dual polarization quadrature phase shift keying signal that included a 20% overhead for forward error correction. Frequency selectivity and enhanced receiver sensitivity is achieved by employing a digital coherent receiver to receive the signal. Experimental results achieved in a back-to-back and 100 km transmission scenarios show an excellent worst case receiver sensitivity of -44 dBm.
authors: Prince M
authors: PM
authors: Anandarajah
authors: Rui
authors: R
authors: Zhou
authors: Robert
authors: R
authors: Maher
authors: Domaniç
authors: D
authors: Lavery
authors: Milen
authors: M
authors: Paskov
authors: Benn
authors: B
authors: Thomsen
authors: Seb
authors: S
authors: Savory
authors: Liam P
authors: LP
authors: Barry