Reconfigurable optical add/drop multiplexer

Abstract

The embodiments of the present invention provide a reconfigurable optical add / drop multiplexer and belongs to the communication technological field. With the reconfigurable optical add / drop multiplexer of the invention adopted, a problem that an existing ROADM has high polarization sensitivity to input optical signals can be solved, and problems such as increase in optical path complexity and insertion loss with the increase of dimensions can be solved. The reconfigurable optical add / drop multiplexer comprises N input ports, N output ports, M upload ports, and M download ports; each input portand each upload port are connected with one first polarizer; each output port and each download port are connected with one second polarizer; the first end of the first polarizer is connected with the second end of the first polarizer, so that a loop comprising the first polarizer can be formed; the first end of the second polarizer is connected with the second end of the second polarizer, so that a loop comprising the second polarizer can be formed; an annular waveguide array exists between a loop LIi and a loop LOj; and a second loop waveguide group exists between the loop LIi and a loop LDk.

Description

technical field [0001] The embodiment of the present application relates to the technical field of communications, and in particular to a reconfigurable optical add-drop multiplexer. Background technique [0002] A reconfigurable optical add / drop multiplexer (Reconfigurable Optical ADD / DROP Multiplexer, ROADM) is a key node in a wavelength division multiplexing (Wavelength Devision Multiplexing, WDM) transmission system and an optical transport network. ROADM usually supports wavelength reconstruction in two or more directions. It can download a signal of a specific wavelength from multi-wavelength signals from any direction to the node, and can also upload a signal of any wavelength from the node to another node. The wavelength of the signal downloaded on this node can be flexibly configured locally or remotely, so that the network to which the ROADM belongs has the ability to dynamically reconfigure. [0003] In the prior art, there is a ROADM based on microring uplink an...

AI Technical Summary

Problems solved by technology

[0005] This application provides a reconfigurable optical add-drop multiplexer ROADM, which can not only solve the problem of high polarization sensitivity of the existing ROADM to the input optical signal, but also solve the complexity of the optical path caused by the increase of the dimension increase, the insertion loss of the device and the sharp deterioration of the crosstalk performance

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