Title :
A Bidirectional WDM/TDM-PON Using DPSK Downstream Signals and a Narrowband AWG
Author :
Calabretta, N. ; Presi, M. ; Proietti, R. ; Contestabile, G. ; Ciaramella, E.
Author_Institution :
Scuola Superiore Sant´´Anna, Pisa
Abstract :
We present an innovative architecture to realize a single feeder bidirectional amplified wavelength-division-multiplexing/time-division-multiplexing passive optical network based on modified nonreturn-to-zero differential phase-shift keying (DPSK) downstream signals at 20 Gb/s and a narrowband arrayed waveguide grating (AWG). The AWG plays at the same time the role of channel distributor, simultaneous demodulator for all DPSK channels, and eliminates the need for chromatic dispersion compensation. A saturated semiconductor optical amplifier (SOA) provides bidirectional amplification to compensate the splitter losses. The remodulated upstream signals are obtained at 1 Gb/s by means of a reflective SOA. Experimental results show error-free operation on both downstream and upstream signal.
Keywords :
arrayed waveguide gratings; differential phase shift keying; passive networks; time division multiplexing; wavelength division multiplexing; DPSK; TDM-PON; WDM; bidirectional amplification; bit rate 1 Gbit/s; bit rate 20 Gbit/s; differential phase shift keying; downstream signals; narrowband AWG; narrowband arrayed waveguide grating; passive optical network; reflective semiconductor optical amplifier; single feeder; time division multiplexing; wavelength division multiplexing; Arrayed waveguide gratings; Differential phase shift keying; Differential quadrature phase shift keying; Narrowband; Optical arrays; Optical waveguides; Passive optical networks; Phased arrays; Semiconductor optical amplifiers; Wavelength division multiplexing; Differential phase-shift keying (DPSK); passive optical network (PON); reflective semiconductor optical amplifier (RSOA); wavelength-division multiplexing (WDM);
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2007.902168
