Title :
Improvement of 112/224-Gbps optical coherent transmission systems by pre-filtering optimization
Author :
Linakis, S.H. ; Carvalho, Luis H. H. ; Franciscangelis, Carolina ; Silva, Edson P. ; Diniz, Julio C. M. ; Oliveira, Julio Cesar R. F.
Author_Institution :
Opt. Syst. Div., CPqD Found., Campinas, Brazil
Abstract :
We provided an approach to improve 112-Gb/s RZ-PDM-QPSK and 224-Gb/s RZ-PDM-16QAM systems performance, based on the matched-filtering principle. An optical pre-filtering optimization at the transmitter side was performed, evaluating different filter profiles. A 33-GHz Nyquist-like optical filter was found to be the best solution to improve both 112-Gb/s and 224-Gb/s systems performance. We also performed a back-to-back evaluation in order to obtain the OSNR performance for the optimized systems. Improvements of 0.5 dB and 1 dB in OSNR performance were found for 112-Gb/s RZ-PDM-QPSK and 224-Gb/s RZ-PDM-16QAN, respectively.
Keywords :
matched filters; optical filters; optical transmitters; optimisation; quadrature amplitude modulation; quadrature phase shift keying; wavelength division multiplexing; Nyquist-like optical filter; RZ-PDM-16QAM; RZ-PDM-QPSK; bit rate 112 Gbit/s; bit rate 224 Gbit/s; frequency 33 GHz; matched-filtering principle; optical coherent transmission systems; optical pre-filtering optimization; transmitter side; Adaptive optics; Optical filters; Optical noise; Optical polarization; Signal to noise ratio; Wavelength division multiplexing; Coherent detection; high-speed optical transmission; matched-filter; optical pre-filtering; quadradture amplitude modulation; quadrature phase-shift-keying;
Conference_Titel :
Microwave & Optoelectronics Conference (IMOC), 2013 SBMO/IEEE MTT-S International
Conference_Location :
Rio de Janeiro
DOI :
10.1109/IMOC.2013.6646526
