A Transversely Asymmetric Reflectionless Periodic Waveguide Microcavity Bandpass Filter

Abstract

The invention discloses a transversely asymmetrical non-reflective periodic waveguide micro-cavity bandpass filter, comprising the following elements connected in succession: an input waveguide, a high order mode attenuator, an asymmetric unit periodic waveguide micro-cavity, a mode adjuster and an output waveguide. A signal light is inputted from the input waveguide; after the light wave at the resonant frequency of the asymmetric unit periodic waveguide micro-cavity passes the high order mode attenuator and the asymmetric unit periodic waveguide micro-cavity successively, it is then converted into a base mold that is outputted from the output waveguide; the light wave differing in the frequency from the resonant frequency of the asymmetric unit periodic waveguide micro-cavity is reflected by the asymmetric unit periodic waveguide micro-cavity and converted into a high order mode, and then is lost rapidly through the high order mode attenuator to realize the input of waveguide non-reflective light. According to the invention, the light wave at the resonant frequency of an asymmetric unit periodic waveguide micro-cavity can be outputted from the frequency selection by the periodic waveguide micro-cavity and the reflection of the light wave at the non-resonant frequency is lost rapidly to obtain a non-reflective periodic waveguide micro-cavity bandpass filter.

Description

technical field [0001] The invention relates to an integrated optical filter device, in particular to a laterally asymmetric non-reflection periodic waveguide microcavity band-pass filter 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. There have been quite a lot of research on integrated optical filters based on gratings, microring resonators, and microdisk resonators, which are widely used in optical routing, optical modulation, optical wavelength division multiplexing, and optical sensing. Optical filters have problems such as large device size and high power consumption, which are not conducive to large-scale integration on a chip. In order to integrate more devices on the same chip, ...

AI Technical Summary

Problems solved by technology

Although the reflected light can be effectively eliminated by devices such as circulators or isolators, this will inevitably increase the complexity of the system and the chip area, which is not conducive to large-scale integration applications and lower production costs.

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