Development of an OADM to reduce the incoherent crosstalk in WDM system

Abstract

Performance of wavelength division multiplexing (WDM) system mostly depends on the components used in it. Optical add-drop multiplexer (OADM) is one of the most important and widely used components in WDM system used to add or drop the signals. Various types of crosstalk occurred due to the imperfections of OADM affect the WDM system performance. It is important to develop the low crosstalk or crosstalk free OADM to enhance the system performance. In this paper, we have developed an efficient OADM with low incoherent crosstalk based on coupler using isolators and Fiber Bragg Grating (FBG). We have also derived the analytical expressions for bit error rate (BER), relative intensity noise (RIN) and power penalty. It is also observed from the results that the proposed OADM has shown the better performance with lower BER and lower power penalty than the existing models while the performance of the WDM system can increase significantly.