Performance Analysis of FBG-Circulator Based OADM in Presence of Coherent Crosstalk

Wavelength division multiplexing (WDM) is an efficient method where several channels are transmitted through a single optical fiber. But performance of WDM system degraded due to the imperfections of different components used in it. Fiber Bragg grating and circulator (FBG-Circulator) based optical add-drop multiplexer (OADM) is the most important component used to add or drop the signals in WDM system. In this article we analyzed the coherent crosstalk of FBG-Circulator based OADM with respect to power penalty, bit error rate (BER), and photo current and analytical models also have developed. Satisfactory system performance have ensured when signals with Bragg wavelength are added. From the results it also shown that the performance of FBG-Circulator based OADM is better than other existing OADMs.