OXADM: Feasibility of network security and migration

Abstract

This paper describes our recent work on advanced ring metropolitan network through the development of an Optical Cross Add-Drop Multiplexer (OXADM). OXADM is a recently invented optical networks device with an asymmetrical architecture. Designed with a purpose to combine the operational concepts of Optical Cross Connect (OXC) and Optical Add-Drop Multiplexer (OADM), OXADM is potentially useful in increasing the efficiency and flexibility of optical networks particularly of the metropolitan ring and mesh configurations. Thus, OXADM is particularly use for networks which require topology migration from ring to mesh, or vice versa [4]. The main function of OXADM is to reconfigure the optical channel path while implementing add/drop function simultaneously. The 4-channel OXADM design is expected to have a maximum operational loss of 6 dB for each channel [5]. With the accumulation function, OXADM is also able to provide survivability through restoration against failures by means of linear, multiplex and ring protection to both configurations that are integrated in single optical architecture. Output power degradation during ring activation is expected to be at 2 dB with respect to normal operating condition. The test was carried out at 2.5 Gbps with BER of 1times10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-10</sup> for linear protection, while BER of 1times10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-19</sup> (to west) and BER of 1times10 <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">-13</sup> (to east) were used for ring protection.