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High-efficiency lithium niobate optical mode switch using a mode-loop Mach-Zehnder interferometer
Optics Letters
|February 28, 2025
Summary
We developed a high-efficiency optical mode switch for mode-division multiplexing in photonic integrated circuits. This device enables faster data transmission in advanced communication systems.
Area of Science:
- Photonics
- Integrated Optics
- Optical Communications
Background:
- Mode-division multiplexing (MDM) enhances communication capacity by transmitting multiple signals over different optical modes within a single channel.
- Optical mode switches are crucial components for directing signals in MDM systems.
Purpose of the Study:
- To propose and experimentally demonstrate a high-efficiency optical mode switch.
- To achieve high performance metrics for on-chip optical switching applications.
Main Methods:
- Utilized a mode-loop Mach-Zehnder interferometer structure.
- Fabricated the device on a lithium niobate on insulator (LNOI) platform.
Main Results:
- Achieved a low half-wave voltage length product (VπL) of approximately 1.83 V·cm.
- Demonstrated a high extinction ratio of 22.9 dB.
- Obtained a fast switching time below 48.3 ps.
Conclusions:
- The developed optical mode switch offers high efficiency and speed.
- This device has significant potential for supporting high-speed data transmission in on-chip MDM systems.
