Silicon-based multifunctional reconfigurable optical filter

Abstract

The invention discloses a silicon-based multifunctional reconfigurable optical filter which comprises a first straight waveguide, a second straight waveguide and a plurality of micro-rings. The micro-rings are connected in parallel through the first straight waveguide and the second straight waveguide. Light field coupling happens between the micro-rings and the two straight waveguides, and no light field coupling happens between the micro-rings. The micro-rings are distributed at equal intervals. The optical filter composed of the micro-rings and the two straight waveguides comprises a plurality of resonant peaks. By controlling the distance of the micro-rings, the phases transmitted and introduced in the straight waveguides between every two adjacent micro-rings by the field with adjacent resonant peak wavelengths are odd times and even times of pi respectively, resonance of different strength is generated for the light field with the adjacent resonant peak wavelengths, and thereforethe optical filter has different filtering characteristics. The filtering functions with different filtering characteristics are achieved through the same filter structure, and it can be ensured thatthe central wavelength and bandwidth of the filter are adjustable.

Description

technical field [0001] The invention belongs to the technical field of optical fiber communication and integrated photonics, and more specifically relates to a silicon-based multifunctional reconfigurable optical filter. Background technique [0002] With the advent of the era of big data, communication systems are developing towards ultra-high speed, low cost, and large capacity. Optical communication has become one of the most important ways of modern information transmission. Filtering technology plays an important role in making full use of the wavelength resources of the optical network and protecting the maximum unimpeded flow of channels in the network system. [0003] According to the frequency selection function of the filter, it can be divided into two types: band-pass filter and band-stop filter. The band-pass filter can obtain signals of certain specific frequencies, and the band-stop filter can eliminate signals of certain specific frequencies. . Bandpass filt...

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Problems solved by technology

[0005] Aiming at the defects of the prior art, the purpose of the present invention is to solve the technical problem that the traditional optical filter basically can only realize a single filtering function, which is difficult to meet the needs of the growing communication system, and is large in size, which is not conducive to integration

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