Performance limitations in fiber Bragg grating based optical add-drop multiplexer due to crosstalk

Wavelength division multiplexing (WDM) optical networks are attracting more and more attention because of their ability to provide increased capacity and flexibility. Optical add-drop multiplexer (OADM) become key components for add or drop wavelengths in high bit rate optical networks. Crosstalk in OADM degrades the performance of WDM system. In this article, we have developed a fiber Bragg-grating based OADM with low crosstalk. We have also developed analytical models for relative intensity noise (RIN), bit error rate (BER) and power penalty to study the performance limitations of this OADM. Results show that crosstalk, RIN and BER of the proposed OADM are lower and provide better performance than the existing OADMs.