A New Bidirectional Optical Add-Drop Multiplexer

Abstract

The invention discloses a novel bidirectional optical add-drop multiplexer. A common port of a first dense wavelength division multiplexing module is connected with an external first multiplexing port, a reflection port of the first dense wavelength division multiplexing module is connected with a reflection port of a second dense wavelength division multiplexing module, and a common port of the second dense wavelength division multiplexing module is connected with an external second multiplexing port. A first selection port of the first dense wavelength division multiplexing module and a first selection port of the second dense wavelength division multiplexing module are connected with two shunt ports of a first optical switch set of a D 1*2 optical switch respectively, and a second selection port of the first dense wavelength division multiplexing module and a second selection port of the second dense wavelength division multiplexing module are connected with two shunt ports of a second optical switch set of the D 1*2 optical switch respectively. A combining port of the first optical switch set of the D 1*2 optical switch is connected with an external first drop-and-insert port, and a combining port of the second optical switch set of the D 1*2 optical switch is connected with an external second drop-and-insert port. The novel bidirectional optical add-drop multiplexer can effectively lower insertion loss and improve system reliability.

Description

Technical field [0001] The invention relates to the technical field of optical communication, in particular to a novel bidirectional optical add / drop multiplexer. Background technique [0002] Optical add / drop multiplexers (OADM) are used in long-distance trunk lines and metropolitan area networks. In trunk line applications, optical add / drop multiplexers are the preferred equipment for intermediate nodes with upper and lower services. The optical add / drop multiplexer allows signals of different wavelengths of different optical networks to be add / drop multiplexed at different locations. Only the information that needs to be downloaded at the node is sent to the processing equipment (including ATM switches, SDH switches and IP routers) without the need for this The information processed by the node is directly passed from the node by the optical channel, thereby greatly improving the efficiency of the node processing information, and overcoming the shortcoming that the electrical...

AI Technical Summary

Problems solved by technology

However, since the traditional bidirectional optical add-drop multiplexer uses 8 WDM devices at the same time, its insertion loss is large and the system reliability is low

Images