Title :
How to use a low-cost DFB local oscillator in ultra-long-haul uncompensated coherent systems
Author :
Secondini, Marco ; Meloni, Gianluca ; Berrettini, G. ; Poti, Luca
Author_Institution :
Scuola Superiore Sant´Anna, Pisa, Italy
Abstract :
The effectiveness of digital coherence enhancement (DCE) for ultra-long-haul uncompensated coherent transmission is experimentally demonstrated. The maximum reach of a 100 Gb/s DP-QPSK system with a low-cost DFB local oscillator is increased from 1600 to 4400 km by DCE, equaling the maximum reach of a narrow-linewidth ECL local oscillator.
Keywords :
feedback oscillators; light coherence; optical communication equipment; optical fibre communication; optical fibre dispersion; optical modulation; quadrature phase shift keying; spectral line narrowing; DCE; DP-QPSK system; bit rate 100 Gbit/s; digital coherence enhancement; distance 1600 km to 4400 km; low-cost DFB local oscillator; narrow-linewidth ECL local oscillator; ultra-long-haul uncompensated coherent systems; Optical coupling; Optical feedback; Optical noise; Optical polarization; Optical pulses; Receivers; Signal to noise ratio;
Conference_Titel :
Optical Communications (ECOC), 2012 38th European Conference and Exhibition on
Conference_Location :
Amsterdam
