Optical Cross Add and Drop Multiplexer: An Analytical Approach

OXADMs increase the capacity, flexibility, reliability and also survivability of the trunk-line optical network used for data communication. This paper describes the analytical modeling of OXADMs and studies their performance as compared to conventional OXC devices. With two restoration schemes, the OXADM prototype system focuses on providing survivability through restoration against failures by means of linear/multiplex and ring protection. Degradation is expected to be about 2 dB in output power with respect to normal conditions in ring protection activation. The test was carried out at 2.5 Gbps with BER 1×10-10 for linear protection while BER 1×10-19 (to west) and 1×10-13 (to east) were used for ring protection. The method of study involves the building and characterizing of two OXADMs, simulated by using Optisystem and modeling them analytically. Loss characterization and measured OSNR are compared against the analytical values and proven to be similar.