We develop a numerical model for the transmission performance of bidirectional wavelength-division-multiplexed (WDM) transmissions. Using the numerical model, wavelength-interleaved 10-Gb/s bidirectional WDM systems are analyzed by considering the impairment of the system performance due to Rayleigh backscattering (RB). We also calculate the power penalty and the crosstalk due to RB from the analytical model, and then compare to the results obtained from the numerical model. The analytical model can provide similar results obtained from the numerical model. Both the numerical and analytical models suggest that the total isolation of filters must be more than 19.5 dB for 320-km transmission while keeping the power penalty of less than 2 dB.
Bibliographical noteFunding Information:
Manuscript received May 8, 2002; revised November 22, 2002. This work was supported in part by the University Research Program of Ministry of Information & Communication and in part by the National Research Laboratory Program in South Korea. The authors are with the Department of Radio Engineering, Korea University, Seoul 136-701, Korea. Digital Object Identifier 10.1109/JLT.2003.810086 Fig. 1. Schematic of modeling Rayleigh backscattering in fiber. The light scattered from each section travels back to the beginning point and sums up.
- Bidirectional amplification
- Bidirectional transmission
- Rayleigh backscattering (RB)
ASJC Scopus subject areas
- Atomic and Molecular Physics, and Optics