Dense wavelength division multiplexing (DWDM) digital fiber optic transmission system for multichannel video, audio, and data

1998 ◽  
Author(s):  
Joseph F. Svacek ◽  
Arthur R. Nelson ◽  
Charles B. Morrison ◽  
James H. Bechtel
Keyword(s):  
Wavelength Division Multiplexing ◽  
Fiber Optic ◽  
Transmission System ◽  
Dense Wavelength Division Multiplexing ◽  
Wavelength Division

scholarly journals A Pulse Shaping Based Optical Transmission System of 128QAM for DWDM with N × 904 Gbps

2019 ◽  
Vol 9 (5) ◽  
pp. 988 ◽  
Author(s):  
Guang Li ◽  
Jianqing Li
Keyword(s):  
Wavelength Division Multiplexing ◽  
Optical Transmission ◽  
Signal To Noise Ratio ◽  
Optical Filter ◽  
Optical Signal ◽  
Transmission System ◽  
Signal To Noise ◽  
Dense Wavelength Division Multiplexing ◽  
Wavelength Division ◽  
Noise Ratio

In this paper, we propose an optical transmission system of 128 quadrature amplitude modulation for dense wavelength division multiplexing. In such a system, Gaussian optical filtering is used to get an appropriate photonic carrier. Theoretical analysis and simulation computation show that the modulated multi-carrier photonic signals with the wavelength spacing of 0.7 nm can transmit for over 80 km with the standard single mode fiber. Using digital signal processing algorithms to compensate the transmission impairments, the transmission rate of the single-carrier photonic signal can reach up to 904 Gbps and the spectral efficiency of the transmission can reach up to 10.33 bps/Hz. When this technology is applied to a dense wavelength division multiplexing system with N channels, the huge message capacity of N × 904 Gbps can be realized. Furthermore, we find that the bit error rate and the error vector magnitude are similarly influenced by the optical signal-to-noise ratio and the bandwidth of the Gaussian optical filter. The influence presents mostly a synchronization trend with the change of the optical signal-to-noise ratio and the bandwidth of Gaussian optical filter.

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