US 2025/0208352 A1Published application

Polarization Controller Based on On-chip Mode Conversion

AssigneeZhejiang University

InventorsDaoxin DAI, Weike ZHAO

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Abstract

A polarization controller based on on-chip mode conversion is provided. An input end-face coupler is connected to an input end of an input polarization-dependent mode converter through an input phase shifter. An output end of the input polarization-dependent mode converter is connected to an input end of a multi-mode 1×1 Mach-Zehnder interferometer (MZI), and an output end of the multi-mode 1×1 MZI is connected to an input end of an output polarization-dependent mode converter. An output end of the output polarization-dependent mode converter is connected to an output end-face coupler through an output phase shifter. The input end and the output end of the multi-mode 1×1 MZI are respectively connected to the input polarization-dependent mode converter and the output polarization-dependent mode converter to form a polarization insensitive beam splitting structure. The polarization controller can convert any two arbitrary polarization states, and has a compact structure and a large bandwidth.

Claims8

Dependent claims

A polarization controller based on on-chip mode conversion, comprising:

an input end-face coupler, an input phase shifter, an input polarization-dependent mode converter, a multi-mode 1×1 Mach-Zehnder interferometer (MZI) with a 1×2 multi-mode beam splitter, an output polarization-dependent mode converter, an output phase shifter, and an output end-face coupler, wherein an output end of the input end-face coupler is connected to an input end of the input polarization-dependent mode converter through the input phase shifter, an output end of the input polarization-dependent mode converter is connected to an input end of the multi-mode 1×1 MZI, an output end of the multi-mode 1×1 MZI is connected to an input end of the output polarization-dependent mode converter, and an output end of the output polarization-dependent mode converter is connected to the output end-face coupler through the output phase shifter;
and
the input end and the output end of the multi-mode 1×1 MZI are respectively connected to the input polarization-dependent mode converter and the output polarization-dependent mode converter through a multi-mode beam splitter and a polarization-dependent mode converter to form a polarization insensitive beam splitting structure.

Dependencies are inferred from the claim text.

Facts

Application: 18/845,439Filed 14 Apr 2023
Priority: CN 202210231798.510 Mar 2022
Published: 26 Jun 2025
Term ends: Not estimatedThe source records don’t support an estimate.

Classification10 codes

G02B 6/2773
Characterised by their function or use, i.e. of the complete device: polarisation splitting or combining
G02B 6/1228
Basic optical elements, e.g. light-guiding paths: tapered waveguides, e.g. integrated spot-size transformers
G02B 6/126
Of the integrated circuit kind: using polarisation effects
G02B 6/2766
Characterised by their function or use, i.e. of the complete device: manipulating the plane of polarisation from one input polarisation to another…