Investigation of chirped return-to-zero differential phase-shift keying (DPSK) modulation format and its performance comparison with return-to-zero DPSK in 40×40-Gbit/s dense wavelength-division multiplexing transmission systems

Xiaoxia Wu; Kun Xu; Guangshan Lu; Jian Wu; Jintong Lin

doi:10.1117/1.2221321

1 July 2006 Investigation of chirped return-to-zero differential phase-shift keying (DPSK) modulation format and its performance comparison with return-to-zero DPSK in 40×40-Gbit/s dense wavelength-division multiplexing transmission systems

Xiaoxia Wu, Kun Xu, Guangshan Lu, Jian Wu, Jintong Lin

Author Affiliations +

Optical Engineering, Vol. 45, Issue 7, 075004 (July 2006). https://doi.org/10.1117/1.2221321

Abstract

Chirped return-to-zero differential phase-shift keying (CRZ-DPSK) modulation format under different channel spacings is investigated and compared with RZ-DPSK in 40×40-Gbit/s dense wavelength-division multiplexing transmission systems. An optimization operation over a wide range of parameters, such as span input power, precompensation percent, and chirp parameter (only for CRZ-DPSK), is performed in the simulation. Simulation results show that CRZ-DPSK demonstrates better performance in transmission distance, nonlinear, and dispersion tolerance with wider channel spacing of 100 GHz. When the channel spacing is reduced to 75 GHz, a slight degradation is observed for CRZ-DPSK and the performances of both formats are acceptable. But when it is reduced from 75 GHz to 50 GHz, a clear degradation of the CRZ-DPSK performance is measured, but RZ-DPSK demonstrates no significant degradation.

©(2006) Society of Photo-Optical Instrumentation Engineers (SPIE)

Citation Download Citation

Xiaoxia Wu, Kun Xu, Guangshan Lu, Jian Wu, and Jintong Lin "Investigation of chirped return-to-zero differential phase-shift keying (DPSK) modulation format and its performance comparison with return-to-zero DPSK in 40×40-Gbit/s dense wavelength-division multiplexing transmission systems," Optical Engineering 45(7), 075004 (1 July 2006). https://doi.org/10.1117/1.2221321

Published: 1 July 2006

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