Asif R, Usman M, Lin CY, Schmauß B (2012)
Publication Language: English
Publication Type: Journal article
Publication year: 2012
Publisher: Institute of Physics: Hybrid Open Access
Book Volume: 14
Pages Range: 095402
Journal Issue: 9
DOI: 10.1088/2040-8978/14/9/095402
In this paper, we numerically investigate the non-linear tolerance of root-raised-cosine (RRC) pulse shaping by interpolating finite impulse response (FIR) filters in conjunction with digital backward propagation (DBP) in coherent 112 Gbit s−1 dual-polarization quadrature phase shift keying (DP-QPSK) transmission. The results depict that RRC pulses are more tolerant to intra-channel non-linearities, i.e. self-phase modulation (SPM), as compared to standard RZ-33 and NRZ pulses. The non-linear threshold point is improved by using RRC pulses by a factor of 2 dB signal input power as compared to RZ pulses and by 4 dB signal launch power as compared to NRZ pulses. The behavior of RRC pulses is also investigated with standard single mode fiber (SMF), non-zero dispersion shifted fiber (NZDSF) and next-generation large Aeff pure silica core fiber (LA-PSCF). Most importantly multi-span DBP is implemented and in the case of RRC pulses the computational efforts of the conventional DBP algorithm are reduced by 80% with a diminutive Q-penalty of 0.74 dB. The duty cycle of the RRC pulses is further optimized for efficient system performance. We have also compared the performance of single-channel transmission with the multi-channel transmission, where the performance is limited due to inter-channel non-linear effects. Furthermore, the non-linear tolerance of RRC pulses is investigated with; (a) different amplifier spacing and (b) variation in transmission link design information for the DBP algorithm.
APA:
Asif, R., Usman, M., Lin, C.-Y., & Schmauß, B. (2012). Application of a digital non-linear compensation algorithm for evaluating the performance of root-raised-cosine pulses in 112 Gbits-1 DP-QPSK transmission. Journal of Optics, 14(9), 095402. https://dx.doi.org/10.1088/2040-8978/14/9/095402
MLA:
Asif, Rameez, et al. "Application of a digital non-linear compensation algorithm for evaluating the performance of root-raised-cosine pulses in 112 Gbits-1 DP-QPSK transmission." Journal of Optics 14.9 (2012): 095402.
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