A multimode coherent mach-zehnder optical interferometer and method of controlling the same

By using a multi-mode coherent Mach-Zehnder interferometer, and by combining beam splitting and phase shifting regions, simultaneous coherent modulation of multi-mode optical signals is achieved, solving the problem of complex traditional structures and simplifying the number of devices.

CN119511599BActive Publication Date: 2026-01-13XIDIAN UNIV
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Patent Information

Application Number
CN202411636716.0
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2024-11-15
Publication Date
2026-01-13
Estimated Expiration
2044-11-15

AI Technical Summary

Technical Problem

Traditional Mach-Zehnder optical interference structures cannot achieve simultaneous coherent modulation of multiple modes, resulting in a significant increase in the number of control devices and a complex structure.

Method used

A multimode co-coherent Mach-Zehnder interferometer is used to split the multimode light energy through a first beam splitter and to compensate the phase of all modes using a multimode phase shift region to ensure that the phase of each mode is the same. Finally, the beams are combined by a second beam splitter to achieve simultaneous modulation of multiple modes.

Benefits of technology

It eliminates the need for mode diversity, enabling simultaneous coherent modulation of multi-mode optical signals, simplifying the control structure and reducing the number of devices.

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Abstract

The application discloses a multimode coherent Mach-Zehnder optical interferometer and a control method thereof. The multimode coherent Mach-Zehnder optical interferometer comprises a first beam splitter, a plurality of multimode phase shift regions and a second beam splitter. The first beam splitter comprises M input ends and N output ends. The input ends of the first beam splitter are used for receiving multimode light. The output ends of the first beam splitter are used for outputting beam-splitting multimode light. The input ends of the plurality of multimode phase shift regions are connected with the output ends of the first beam splitter. The input ends of the plurality of multimode phase shift regions are used for receiving the beam-splitting multimode light. The multimode phase shift regions compensate the light phases of all modes of the beam-splitting multimode light. The output ends of the plurality of multimode phase shift regions are used for outputting processed multimode light. The second beam splitter comprises N input ends and L output ends. The input ends of the second beam splitter are connected with the output ends of the plurality of multimode phase shift regions. The input ends of the second beam splitter are used for receiving the processed multimode light. The output ends of the second beam splitter are used for outputting combined multimode light. The application can realize the function of multimode light coherence.
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Citation Information

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