Abstract

Bi-end dispersion compensation (DC) for ultralong nonreturn-to-zero (NRZ) optical transmission system is studied. Both the loss and dispersion of the transmission fiber are periodically compensated. Two dispersive elements are placed at the input and output ends of a compensation period, respectively, to compensate for fiber dispersion. The pulse compression owing to self-phase modulation (SPM) can be adjusted by the compensation ratios of the dispersive elements at the two ends of a compensation period. Therefore, the pulse compression can be optimized and the system performance can be improved to compare with the system with either pre- or postdispersion compensation. The rules to design the system are considered. The transmission system of 10-Gb/s bit rate, 9000-km transmission distance, and 100-km compensation period is taken as an example. The second-order fiber dispersion is assumed to be completely compensated. Wave equation is numerically solved to study the system performance which is represented by Q factor. The relations of several system parameters and Q factor are studied. The system parameters include the compensation ratios of the dispersive elements at the two ends of a compensation period, dispersion of transmission fiber, signal power, and the compensation ratios of third-order fiber dispersion. If the third-order fiber dispersion cannot be completely compensated, it is found that one can use a higher signal power to improve the system performance.

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  1. H. Taga, S. Yamamoto, N. Edagawa, Y. Yoshida, S. Akiba, and H. Wakabayashi, "Performance evaluation of the different types of fiber-chromatic-dispersion equalization for IM-DD ultralong-distance optical communication systems with Er-doped fiber amplifiers," J. Lightwave Technol., vol. 12, pp. 1616-1621, 1994.
  2. A. Naka and S. Saito, "Transmission distance of in-line amplifier systems with group-velocity-dispersion compensation," J. Lightwave Technol., vol. 13, pp. 862-867, 1995.
  3. F. Metera and M. Settembre, "Comparison of the performance of optically amplified transmission systems," J. Lightwave Technol., vol. 14, pp. 1-12, 1996.
  4. D. Marcuse, "Single-channel operation in very long nonlinear fibers with optical amplifiers at zero dispersion," J. Lightwave Technol., vol. 9, pp. 356-361, 1991.
  5. D. Marcuse, "RMS width of pulses in nonlinear dispersive fibers," J. Lightwave Technol., vol. 10, pp. 17-21, 1992.
  6. M. Florjanczyk and R. Tremblay, "RMS width of pulses in nonlinear dispersive fibers: Pulses of arbitrary initial form with chirp," J. Lightwave Technol., vol. 13, pp. 1801-1806, 1995.
  7. N. Kikuchi and S. Sasaki, "Analytical evaluation technique of self-phase-modulation effect on the performance of cascaded optical amplifier systems," J. Lightwave Technol., vol. 13, pp. 868-878, 1995.

J. Lightwave Technol.

H. Taga, S. Yamamoto, N. Edagawa, Y. Yoshida, S. Akiba, and H. Wakabayashi, "Performance evaluation of the different types of fiber-chromatic-dispersion equalization for IM-DD ultralong-distance optical communication systems with Er-doped fiber amplifiers," J. Lightwave Technol., vol. 12, pp. 1616-1621, 1994.

A. Naka and S. Saito, "Transmission distance of in-line amplifier systems with group-velocity-dispersion compensation," J. Lightwave Technol., vol. 13, pp. 862-867, 1995.

F. Metera and M. Settembre, "Comparison of the performance of optically amplified transmission systems," J. Lightwave Technol., vol. 14, pp. 1-12, 1996.

D. Marcuse, "Single-channel operation in very long nonlinear fibers with optical amplifiers at zero dispersion," J. Lightwave Technol., vol. 9, pp. 356-361, 1991.

D. Marcuse, "RMS width of pulses in nonlinear dispersive fibers," J. Lightwave Technol., vol. 10, pp. 17-21, 1992.

M. Florjanczyk and R. Tremblay, "RMS width of pulses in nonlinear dispersive fibers: Pulses of arbitrary initial form with chirp," J. Lightwave Technol., vol. 13, pp. 1801-1806, 1995.

N. Kikuchi and S. Sasaki, "Analytical evaluation technique of self-phase-modulation effect on the performance of cascaded optical amplifier systems," J. Lightwave Technol., vol. 13, pp. 868-878, 1995.

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