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Papagiannakis, Ioannis; Klonidis, Dimitrios; Birbas, Alexios N.; Kikidis, John; Tomkos, Ioannis
Optics communications, 07/2009, Letnik: 282, Številka: 14Journal Article
The improvement on the impact of filter concatenation effect on optical signal quality is investigated and discussed for applications in metropolitan optical networks utilizing cost-effective 10-Gb/s transmitters. The sources are low-cost conventional directly modulated lasers (DMLs), fabricated for operation at 2.5 Gb/s but modulated at 10 Gb/s. Performance improvement is achieved by using decision-feedback equalization (DFE) at the receiver end. Experimental studies consider both transient and adiabatic chirp dominated DMLs sources with different chirp characteristics. Measurements have been obtained using a recirculating loop set-up and the performance improvement is evaluated in terms of bit-error-rate (BER) versus number of loops.
