Title :
BER Performance of Coherent Optical Communications Systems Employing Monolithic Tunable Lasers With Excess Phase Noise
Author :
Huynh, Tam N. ; Nguyen, An T. ; Wing-Chau Ng ; Lim Nguyen ; Rusch, Leslie A. ; Barry, Liam P.
Author_Institution :
Sch. of Electron. Eng., Dublin City Univ., Dublin, Ireland
Abstract :
We analyze the bit error rate (BER) performance of optical coherent communication systems employing multi-section monolithic tunable lasers with large excess phase noise. The BER of the coherent system utilizing a second-order decision-directed digital phase-locked loop (DD-PLL) for phase tracking was computed numerically. Experimental results have also been demonstrated with a 16-quadratic-amplitude modulation coherent system deploying a sampled-grating distributed Bragg reflector laser at 16 Gbaud that confirms the performance of the second-order DD-PLL in tracking the excess phase noise.
Keywords :
Bragg gratings; digital phase locked loops; distributed Bragg reflector lasers; error statistics; laser noise; laser tuning; light coherence; numerical analysis; optical communication equipment; optical modulation; optical phase locked loops; optical tracking; phase noise; quadrature amplitude modulation; BER performance; bit error rate performance; excess phase noise; multisection monolithic tunable lasers; numerical computation; optical coherent communication systems; phase tracking; sampled-grating distributed Bragg reflector laser; second-order decision-directed digital phase-locked loop; sixteen-quadratic-amplitude modulation coherent system; Bit error rate; Frequency modulation; Laser modes; Laser noise; Mathematical model; Phase noise; Coherent communications; excess phase noise; sampled-grating distributed Bragg reflector (SG-DBR) laser; tunable laser phase noise;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2014.2319108
