Reconfigurable optical add-drop multiplexer structure for realizing 16 channels with multiple orders

Abstract

The invention discloses a reconfigurable optical add-drop multiplexer (an ROADM structure) for realizing 16 channels with multiple orders. The ROADM structure comprises an input part, a first-order filtration area, a second-order filtration area, a local download area, a combiner and an output part which are connected through nanometer wire waveguides. The ROADM structure has a certain width by utilizing the free spectral width of a micro-ring resonator and filters a plurality of paths of incident wavelengths with respective orders so as to ensure that the wavelength number in each download waveguide is reduced progressively and finally realize the single wavelength download in each output port, thereby reducing the temperature control difficulty and improving the response speed of devices.

Description

technical field [0001] The present invention relates to the technical field of reconfigurable optical add / drop multiplexer (ROADM), in particular to a ROADM structure that can realize 16-channel wavelength upload and download based on a silicon-based nanowire waveguide micro-ring resonator by adopting a multi-stage filtering method. Using this device structure can ensure the fully reconfigurable performance of the ROADM, and at the same time make the temperature stability of the whole device better and the response rate faster. Background technique [0002] Optical Add-Drop Multiplexer (OADM) is a node device of the optical fiber communication network. Its basic function is to download the signal to the local from the optical channel, and upload the signal sent by the local user to other node users into the optical fiber channel at the same time, instead of Affects the transmission of other wavelength channels, and maintains the transparency of the optical domain, and can ha...

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Problems solved by technology

The maximum value of the FSR of a micro-ring resonator is usually more than ten nanometers, and the wavelength range of 12.8nm has reached the limit value of the micro-ring FSR. Will make ROADMs based on micro-ring resonators not work properly

[0030] Since the micro-ring resonator itself is a temperature-sensitive component, a temperature monitoring and temperature control unit is required to ensure its stable operation. Such a high temperature change increases the difficulty of temperature control, and device failure may occur during the tuning process; so A high temperature range will slow down the response rate of the device and cause network delays

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