Related Experiment Video
Updated: Aug 16, 2025
07:56
A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
8.6K
Integrated lithium niobate polarization beam splitter based on a photonic-crystal-assisted multimode interference
Optics Letters
|December 23, 2022
Summary
We developed a high-performance polarization beam splitter (PBS) on lithium niobate on insulator (LNOI) for photonic integrated circuits. This device enhances data capacity in communication systems by efficiently splitting optical signals.
Area of Science:
- Photonics
- Materials Science
- Electrical Engineering
Background:
- Lithium niobate on insulator (LNOI) is a key material for high-speed photonic integrated circuits (PICs) due to lithium niobate's (LN) electro-optic properties.
- Efficient integration of passive components like polarization beam splitters (PBSs) is crucial for routing optical signals in PICs.
- PBSs are essential for on-chip polarization division multiplexing (PDM) to increase data capacity in communication systems.
Purpose of the Study:
- To design and experimentally demonstrate a high-performance PBS for LNOI-based PICs.
- To enable enhanced data capacity in future communication systems through improved polarization handling.
Main Methods:
- Design of a PBS using a photonic crystal (PC)-assisted multimode interference (MMI) coupler.
- Experimental fabrication and characterization of the designed PBS on the LNOI platform.
Main Results:
- The fabricated PBS achieved a polarization extinction ratio (ER) of 15 dB.
- The device demonstrated effective performance across a broad wavelength range (1525–1565 nm).
Conclusions:
- The demonstrated PC-assisted MMI coupler is a high-performance PBS suitable for LNOI PICs.
- This technology supports the development of high-speed, large-capacity PICs for advanced communication systems.
