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Updated: Jan 20, 2026
14:18
Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
Published on: February 28, 2016
11.9K
Ultra-compact dual-polarization silicon mode-order converter.
Optics Letters
|August 30, 2019
Summary
This study introduces a novel dual-polarization mode-order converter using silicon metasurfaces. This device enables simultaneous mode conversions for both transverse electrical and transverse magnetic polarizations, advancing optical switching systems.
Area of Science:
- Photonics and Optical Engineering
- Metamaterials and Nanophotonics
Background:
- Mode-order converters are crucial for multimode optical transmission and switching.
- Conventional converters are limited to single mode-pair conversion due to phase-matching constraints.
- Existing devices often have large footprints and limited functionality.
Purpose of the Study:
- To propose and demonstrate a dual-polarization mode-order converter.
- To achieve simultaneous mode conversions for both TE and TM polarizations.
- To develop a compact and efficient building block for optical switching systems.
Main Methods:
- Utilized the concept of a silicon planar metasurface for device design.
- Designed a prototype device with a footprint of 4 μm × 1.6 μm.
- Experimentally verified the device's performance for TE0-to-TE1 and TM0-to-TM1 conversions.
Main Results:
- Simultaneous mode-order conversions for TE and TM polarizations were achieved.
- Measured insertion losses were below 2.3 dB for both polarizations.
- Crosstalk levels were below -11.5 dB across a 1525-1565 nm wavelength range.
Conclusions:
- The proposed silicon metasurface device enables efficient dual-polarization mode-order conversion.
- This technology offers a compact and simpler solution for polarization and mode multiplexed optical switching.
- The device shows potential for next-generation optical communication and data processing systems.
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