Abstract

Electronic predistortion (EPD) to compensate for chromatic dispersion is an attractive option to replace inline optical dispersion compensation (ODC). In this paper, we present a study on the impact of intra- and interchannel nonlinearities in EPD systems compared to optimized ODC systems at 10 and 40Gbit/s for NRZ-OOK modulation. First, the theoretically achievable nonlinear tolerance of EPD and ODC systems is studied by neglecting the EPD transmitter's hardware limitations and the dispersion compensating fiber's loss and nonlinearity. At 10Gbit/s, EPD shows stronger degradations due to intra- and interchannel nonlinearities than optimized ODC. We extend existing studies for 10 Gbit/s EPD by analyzing the relevant launch power levels before interchannel nonlinearities limit the performance. The limit is 8 dB larger for ODC than EPD at 10 Gbit/s. In contrast, operating at a bit rate of 40 Gbit/s significantly reduces this difference in the nonlinearity tolerance between EPD and ODC both for single channel and WDM transmission. The maximum power per channel of 40 Gbit/s EPD is only 1 dB smaller compared to ODC.We then conduct a more realistic comparison at 40 Gbit/s by including the effects of 60 GSa/s digital-to-analog conversion with 4-bit quantization in the EPD transmitter and by considering the loss and nonlinearity of the dispersion compensating fiber. Analyzing the optical signal-to-noise ratio margins confirms that the performance of the realistic EPD system is similar to optimized ODC making EPD more attractive for electronic dispersion compensation at bit rates of 40 Gbit/s and above.

© 2009 IEEE

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  1. B. Franz, A. Klekamp, D. Rösener, F. Buchali, H. Bülow, "Performance improvements of different modulation formats by applying adaptive electronic equalisation in 43 Gbit/s systems," Proc. Eur. Conf. Optical Communication (ECOC 2007) .
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2007 (1)

S. J. Savory, G. Gavioli, R. I. Killey, P. Bayvel, "Electronic compensation of chromatic dispersion using a digital coherent receiver," Opt. Exp. 15, 2120-2126 (2007).

2006 (3)

S. Chandrasekhar, C. Doerr, L. Buhl, "Demonstration of 100% precompensated DWDM transmission over 1280 km of SSMF with no inline dispersion compensation using interconnected recirculating loops," IEEE Photon. Technol. Lett. 18, 256-258 (2006).

K. Roberts, C. Li, L. Strawczynski, M. O'Sullivan, I. Hardcastle, "Electronic precompensation of optical nonlinearity," IEEE Photon. Technol. Lett. 18, 403-405 (2006).

C. Weber, J. K. Fischer, C.-A. Bunge, K. Petermann, "Electronic precompensation of intrachannel nonlinearities at 40 Gb/s," IEEE Photon. Technol. Lett. 18, 1759-1761 (2006).

2004 (1)

L. K. Wickham, R.-J. Essiambre, A. H. Gnauck, P. J. Winzer, A. R. Chraplyvy, "Bit pattern length dependence of intrachannel nonlinearities in pseudolinear transmission," IEEE Photon. Technol. Lett. 16, 1591-1593 (2004).

2000 (1)

E. Forestieri, "Evaluating the error probability in lightwave systems with chromatic dispersion, arbitrary pulse shape and pre- and postdetection filtering," J. Lightw. Technol. 18, 1493-1503 (2000).

1996 (1)

IEEE Photon. Technol. Lett. (4)

S. Chandrasekhar, C. Doerr, L. Buhl, "Demonstration of 100% precompensated DWDM transmission over 1280 km of SSMF with no inline dispersion compensation using interconnected recirculating loops," IEEE Photon. Technol. Lett. 18, 256-258 (2006).

K. Roberts, C. Li, L. Strawczynski, M. O'Sullivan, I. Hardcastle, "Electronic precompensation of optical nonlinearity," IEEE Photon. Technol. Lett. 18, 403-405 (2006).

L. K. Wickham, R.-J. Essiambre, A. H. Gnauck, P. J. Winzer, A. R. Chraplyvy, "Bit pattern length dependence of intrachannel nonlinearities in pseudolinear transmission," IEEE Photon. Technol. Lett. 16, 1591-1593 (2004).

C. Weber, J. K. Fischer, C.-A. Bunge, K. Petermann, "Electronic precompensation of intrachannel nonlinearities at 40 Gb/s," IEEE Photon. Technol. Lett. 18, 1759-1761 (2006).

J. Lightw. Technol. (1)

E. Forestieri, "Evaluating the error probability in lightwave systems with chromatic dispersion, arbitrary pulse shape and pre- and postdetection filtering," J. Lightw. Technol. 18, 1493-1503 (2000).

Opt. Exp. (1)

S. J. Savory, G. Gavioli, R. I. Killey, P. Bayvel, "Electronic compensation of chromatic dispersion using a digital coherent receiver," Opt. Exp. 15, 2120-2126 (2007).

Opt. Lett. (1)

Other (15)

P. Bayvel, R. I. Killey, Opt. Fiber Telecommun. (Academic, 2002) pp. 630-630.

R. J. Essiambre, R. Gregory, B. Mikkelsen, Opt.Fiber Telecommun. (Academic, 2002).

P. Serena, A. Orlandini, A. Bononi, "The memory of optimized dispersion-managed periodic optical links," Proc. Eur. Conf. Optical Communication (ECOC 2007) .

J.-C. Antona, E. Grellier, A. Bononi, S. Petitrenaud, S. Bigo, "Revisiting binary sequence length requirements for the accurate emulation of highly dispersive transmission systems," Proc. Eur. Conf. Optical Communication (ECOC 2008) .

P. J. Winzer, R. J. Essiambre, "Electronic pre-distortion for advanced modulation formats," Proc. Eur. Conf. Optical Communication (ECOC 2005) .

B. Franz, A. Klekamp, D. Rösener, F. Buchali, H. Bülow, "Performance improvements of different modulation formats by applying adaptive electronic equalisation in 43 Gbit/s systems," Proc. Eur. Conf. Optical Communication (ECOC 2007) .

F. Hauske, B. Lankl, C. Xie, E.-D. Schmidt, "Iterative electronic equalization utilizing low complexity MLSEs for 40 Gbit/s DQPSK modulation," Proc. Conf. Optical Fiber Communication (OFC 2007) .

C. Weber, K. Petermann, "Impact of fibre nonlinearities in electronic dispersion compensation systems at 40 Gb/s," Proc. Eur. Conf. Optical Communication (ECOC 2008) .

M. S. O'Sullivan, K. Roberts, C. Bontu, "Electronic dispersion compensation techniques for optical communication systems," Proc. Eur. Conf. Optical Communication (ECOC 2005) .

R. I. Killey, P. M. Watts, M. Glick, P. Bayvel, "Electronic precompensation techniques to combat dispersion and nonlinearities in optical transmission," Proc. Eur. Conf. Optical Communication (ECOC 2005) .

R. J. Essiambre, P. J. Winzer, "Fibre nonlinearities in electronically pre-distorted transmission," Proc. Eur. Conf. Optical Communication (ECOC 2005) .

A. Klekamp, F. Buchali, M. Audoin, H. Bulow, "Nonlinear limitations of electronic dispersion pre-compensation by intrachannel effects," Proc. Conf. Optical Fiber Commun. (OFC 2006) .

S. L. Jansen, I. Morita, D. van den Borne, G. D. Khoe, H. de Waardt, P. M. Krummrich, "Experimental study of XPM in 10-Gb/s NRZ precompensated transmission systems," Proc. Conf. Optical Fiber Communications (OFC 2007) .

A. Carena, V. Curri, P. Poggiolini, F. Forghieri, "Optical versus electronic chromatic dispersion compensation in WDM coherent PM-QPSK systems at 111 Gbit/s," Proc. Conf. Optical Fiber Communications (OFC 2008) .

R. I. Killey, P. M. Watts, M. Glick, P. Bayvel, "Electronic dispersion compensation by signal predistortion," Proc. Conf. Optical Fiber Communications (OFC 2006) .

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