Digital compensation of chromatic dispersion in 112-Gbit/s PDM-QPSK system

Tianhua Xu; Gunnar Jacobsen; Sergei Popov; Jie Li; Ke Wang; Ari T. Friberg

doi:10.1117/12.849760

25 November 2009 Digital compensation of chromatic dispersion in 112-Gbit/s PDM-QPSK system

Tianhua Xu, Gunnar Jacobsen, Sergei Popov, Jie Li, Ke Wang, Ari T. Friberg

Proceedings Volume 7632, Optical Transmission Systems, Switching, and Subsystems VII; 763202 (2009) https://doi.org/10.1117/12.849760
Event: Asia Communications and Photonics, 2009, Shanghai, Shanghai , China

Abstract

High bit rates optical communication systems pose the challenge of their tolerance to linear and nonlinear fiber impairments. Coherent optical receivers using digital signal processing techniques can mitigate the fiber impairments in the optical transmission system, including the chromatic dispersion equalization with digital filters. In this paper, an adaptive finite impulse response filter employing normalized least mean square algorithm is developed for compensating the chromatic dispersion in a 112-Gbit/s polarization division multiplexed quadrature phase shift keying coherent communication system, which is established in the VPI simulation platform. The principle of the adaptive normalized least mean square algorithm for signal equalization is analyzed theoretically, and at the meanwhile, the taps number and the tap weights in the adaptive finite impulse response filter for compensating a certain fiber chromatic dispersion are also investigated by numerical simulation. The chromatic dispersion compensation performance of the adaptive filter is analyzed by evaluating the behavior of the bit-error-rate versus the optical signal-to-noise ratio, and the compensation results are also compared with other present digital filters.

Citation Download Citation

Tianhua Xu, Gunnar Jacobsen, Sergei Popov, Jie Li, Ke Wang, and Ari T. Friberg "Digital compensation of chromatic dispersion in 112-Gbit/s PDM-QPSK system", Proc. SPIE 7632, Optical Transmission Systems, Switching, and Subsystems VII, 763202 (25 November 2009); https://doi.org/10.1117/12.849760

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