Uplink and downlink filters based on single anti-symmetric multimode periodic waveguide micro-cavity

Abstract

The invention discloses uplink and downlink filters based on single anti-symmetric multimode periodic waveguide micro-cavity, wherein the bus waveguide and the uplink and downlink waveguides are laterally coupled with the anti-symmetric multimode periodic waveguide micro-cavity in the coupling region; the periodic waveguide of the anti-symmetric multimode periodic waveguide micro-cavity at the coupling region supports not less than two working modes and the propagation constants of two modes are different from each other, there is inverse crossover in the energy band of the two working modes in the periodic waveguide dispersion relation of the anti-symmetric multimode periodic waveguide micro-cavity in the coupling region, and there is reflection coupling between the two modes. The invention can enable the light wave propagating in the bus waveguide and located at the resonance frequency of the anti-symmetric multi-mode periodic waveguide micro-cavity to be downloaded to the downlink output end of the uplink and downlink waveguides through the anti-symmetric multimode periodic waveguide micro-cavity, or enable the light wave at the resonant frequency input from the uplink end of the uplink and downlink waveguides to be inserted into the bus waveguide, thereby obtaining an on-chip filter with a simple structure, high upload and download efficiency, and ultra-compact size.

Description

technical field [0001] The invention relates to an integrated optical filter device, in particular to an ultra-compact add / drop and multiplex / demultiplexer of a transverse asymmetrical multimode periodic waveguide microcavity in the field of optical waveguide devices. Background technique [0002] Optical filter is one of the core components of optical communication, on-chip optical interconnection and other technologies. In recent years, due to the urgent need for large-capacity communications, low-cost, chip-based waveguide filters have developed rapidly. Integrated optical filters based on gratings, microrings, and microdisks have been relatively mature after years of research, and are widely used in optical routing, optical modulation, optical wavelength division multiplexing, and optical sensing. However, based on traditional optical microcavities such as microrings, The filter has problems such as large device size and high tuning power consumption, which is not condu...

AI Technical Summary

Problems solved by technology

But this scheme has its inherent defects: first, the use of two microcavities doubles the device size, which is not conducive to the miniaturization and large-scale integration of the device; The resonant frequencies are exactly the same, requiring additional power consumption to tune and calibrate the resonant wavelengths of the two periodic waveguide microcavities

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