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Integrated lithium niobate optical mode (de)interleaver based on an asymmetric Y-junction
Optics Letters
|September 1, 2023
Summary
Researchers developed an optical mode interleaver on lithium niobate on insulator (LNOI) platforms. This device enables efficient optical mode division multiplexing (MDM) for high-capacity photonic integrated circuits (PICs).
Area of Science:
- Photonics
- Materials Science
- Integrated Optics
Background:
- Lithium niobate on insulator (LNOI) offers excellent electro-optic, nonlinear optic, low-loss, and wide transparency properties for advanced photonic integrated circuits (PICs).
- Optical mode interleavers are crucial for enhancing PIC functionality, particularly for optical mode division multiplexing (MDM) systems.
Purpose of the Study:
- To experimentally demonstrate an optical mode interleaver on the LNOI platform.
- To enable variable mode assignment for high channel utilization and capacity in future PICs.
Main Methods:
- Fabrication of an optical mode interleaver utilizing an asymmetric Y-junction.
- Experimental characterization of the device performance on the LNOI platform.
Main Results:
- Achieved an insertion loss below 0.46 dB.
- Demonstrated modal crosstalk below -13.0 dB.
- Operated effectively over a broad wavelength range of 1500-1600 nm.
Conclusions:
- The demonstrated mode interleaver is a promising component for high-speed, large-capacity PICs.
- Its simple structure, scalability, and efficient mode manipulation capabilities are key advantages on the LNOI platform.
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