The OSNR Study on Optical Cross Add and Drop Multiplexer (OXADM): With Limitation Highlight

The second generation of optical switching devices described in this paper increases the capacity, flexibility, reliability and also survivability of the trunk-line optical network used for data communication. OXADM features two different bandwidth which operate in working and protection line in a ring configuration. The 'accumulation' feature has expanded their application in wavelength management and restoration system in contrast with conventional devices such as OADM and OXC. With two restoration schemes, the OXADM prototype system focuses on providing survivability through restoration against failures, such as cable/fiber cut in optical layer with ring topology by means of linear/multiplex protection and ring protection. Hybrid restoration technique with OXADM enables the linear, ring and multiplex protection mechanism to be integrated in single optical network, and it will be activated according to the degree and types of failure. The paper presents the OSNR studies on OXADM and its junction by analytically and experimentally. The maximum cascaded OXADMs based on the number of operating wavelengths and input/output ports are also calculated. The result then will be compared with conventional devices; OXC and OADM.