Reconfigurable optical filter based on micro-ring array

Abstract

The invention discloses a reconfigurable optical filter based on a micro-ring array, and belongs to the technical field of optical fiber communication and integrated photonics. The filter comprises afirst bus waveguide, a second bus waveguide and a plurality of micro-rings; the plurality of micro-rings are connected in parallel by the first bus waveguide and the second bus waveguide; the plurality of micro-rings are arranged between the first bus waveguide and the second bus waveguide at equal intervals; coupling regions are arranged between the micro-rings and the first bus waveguide; coupling regions are arranged between the micro-rings and the second bus waveguide; coupling regions are arranged between adjacent micro-rings; each coupling region is provided with a reconfigurable opticalcoupler, and the on-off state of the reconfigurable optical coupler can be independently regulated and controlled. The optical coupler structure with the reconfigurable on-off state is introduced into the coupling regions of the micro-ring array, whether the coupling action occurs in each coupling region or not can be independently controlled, various topological structures can be realized in theone-dimensional micro-ring array by designing and combining the on-off states of all coupling regions, and the diversity of a filtering function is realized.

Description

technical field [0001] The invention belongs to the technical field of optical fiber communication and integrated photonics, and more specifically relates to a reconfigurable optical filter based on a microring array. Background technique [0002] Optical communication is one of the most important ways of modern information and transmission, and it is moving towards the direction of ultra-high speed, large capacity, large broadband, long distance, and low cost. Optical filters play an important role in making full use of the wavelength resources of optical networks and protecting the maximum unimpeded channels in the network system. They are important devices in all-optical signal processing and wavelength division multiplexing systems. Microring filter is a kind of optical filter. Filters based on passive microrings, such as silicon and silicon nitride microrings, use the amplitude response and phase response characteristics of the microrings to process optical signals to ...

AI Technical Summary

Problems solved by technology

[0004] In view of the above defects or improvement needs of the prior art, the present invention provides a reconfigurable filter based on a microring array, the purpose of which is to introduce an optical coupler structure with reconfigurable switching states in the coupling region of the microring array , can independently control whether the coupling effect occurs in each coupling area, and then design and combine the switching states of each coupling area, thereby solving the technical problem of single filtering function of the filter based on the micro-ring structure

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