19 August 2003 Impact of phase noise, chromatic dispersion, and nonlinear effects on 10-Gb/s optical differential quadrature phase shift keying (oDQPSK) systems
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Abstract
The impact of phase noise, chromatic dispersion and non-linear effects on a 10 Gb/s Optical Differential Quaternary Phase Shift Keying (oDQPSK) system has been evaluated by means of computer simulation. Both single channel and multiple WDM channels have been considered. The results show that these systems present a high spectral efficiency that allows a reduced channel spacing as low as 25 MHz. Furthermore, this effect leads to an increase on dispersion tolerance together with a non-linear effects robustness due to the signal constant envelope characteristics. Finally, some relevant results have been found concerning the laser linewidth requirements (less than 10 MHz). Simulations show that phase noise can be the limiting factor of oDQPSK systems.
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Joan Manel Gene, Joan Manel Gene, Marcal Soler, Marcal Soler, Albert Cabre, Albert Cabre, Robert I. Killey, Robert I. Killey, Josep J. Prat, Josep J. Prat, "Impact of phase noise, chromatic dispersion, and nonlinear effects on 10-Gb/s optical differential quadrature phase shift keying (oDQPSK) systems", Proc. SPIE 5247, Optical Transmission Systems and Equipment for WDM Networking II, (19 August 2003); doi: 10.1117/12.511170; https://doi.org/10.1117/12.511170
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