Active polarization rotator realized based on mixed surface plasma groove waveguide

Abstract

The invention discloses an active polarization rotator realized based on a mixed surface plasma groove waveguide. The active polarization rotator comprises a power beam splitter, an MZI phase modulation unit, a polarization rotation control unit and a beam combiner. The polarization rotation control unit comprises a mixed surface plasma groove waveguide. The mixed surface plasma groove waveguide has a certain groove width, two dielectric waveguides of the mixed surface plasma groove waveguide have a certain width, and two sides of the mixed surface plasma groove waveguide are respectively provided with a material which has a certain thickness, length and width and has metal characteristics at a certain interval. The active polarization rotator has the advantages that the structure is simplified, the polarization conversion loss is small, and the active regulation and control of the polarization state of the output light can be realized for the incident light of two different polarization states.

Description

technical field [0001] The invention relates to an active polarization rotator realized based on a hybrid surface plasmon groove waveguide. Background technique [0002] The polarization diversity scheme is the main method to solve the problem of polarization sensitivity in the optical path. One of the most important core components in this scheme is the polarization rotator, which can ensure that only one polarization state signal is contained in the subsequent optical path, thereby simplifying the design of functional devices and optimization. By introducing the asymmetry of the waveguide structure, traditional polarization rotators can only achieve passive conversion between fixed polarization states, but in many applications such as control of the polarization state of output light from on-chip lasers, biosensing, polarization multiplexing, etc. In this scenario, it is necessary to realize the time-domain change of the polarization state. Referring to the similar desig...

AI Technical Summary

Problems solved by technology

Although this scheme can control any state of the output polarized light, it can be used as an implementation scheme of an active polarization rotator, but the structure is complex and the polarization conversion loss is large.

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