RESEARCH OF CROSSTALK IN CASCADE SYSTEM OF OXC AND OADM;

This paper puts an emphasis on the advantages of the wave division multiplexing(WDM) and the drawbacks of the available synchronous digital hierarchy(SDH),and analyses the key technologies of the AON, such as OXC and OADM, which can be used to effectively overcome the bottle-neck effect of the network.

A new formula to estimate OSNR for the link with cascaded OADM/OXC nodes in optical network is presented.

Reconfigurable optical add-drop multiplexer based on F-P filter;

A novel reconfigurable optical add-drop multiplexer(ROADM) based on narrowband thin-film filter is proposed.

The design of an optical add-drop multiplexer OADM,using an asymmetric coupler and a slanted Bragg grating,is presented.

A type of OADM based on tunable F-P cavity filter;

The Future of OXC/OADM;

The Essential Devices of All-optical Network——OXC and OADM;

This paper propsed an idea that the optical network and IP network will develop parallelly for long time, analysed the important meaning of OXC and OADM in the future high speed information network,and pointed out that OXC,OADM,OTDM and OPS represent the development direction of future optical network.

Optical add/drop multiplexer (OADM) is an important network element in optical transport network(OTN).

In the first stage, it aims to develop OXCs, OADMs, core routers and an integrated network management system, and to construct a high speed network based on IP/DWDM in Beijing which will be an experiment platform of advanced network technologies.