Experimental analysis of all-optical 4-ASK signal generation through parametric amplification

Abstract

We present experimental results concerning a new alloptical technique that multiplexes two binary signals into a quaternary one (4-ASK). The technique is based on parametric amplification. Values of the quaternary levels obtained experimentally, as a function of the extinction ratios of the binary input signals, show a rather good agreement with the simulated and the analytical results. The generated 4-ASK signals were propagated through 75 km of standard single-mode fiber and experienced eye penalties of only 0.5 dB. This indicates the robustness of the technique for practical applications in metropolitan area networks.

All-Optical Amplitude Multiplexing Through Fiber Parametric Interaction Between Binary Signals

“…We begin by reviewing the fundamentals of FWM and parametric amplification (PA) in Section 2. Then, in Section 3, we discuss two techniques that use FWM (Abbade et al, 2005;Abbade et al, 2006a;Abbade et al, 2006b) and PA (Abbade et al, 2010a;Abbade et al, 2010b;Marconi et al, 2011) to convert two 2-ASK signals into a quaternary amplitude-shift keying (4-ASK) one; named, respectively, OAM-4F and OAM-4P. In Section 4, utilization of FWM and PA to convert two binary signals into a ternary amplitude-shift keying (3-ASK) is approached.…”