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Related Experiment Video

Updated: Jun 18, 2025

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

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Experimental demonstration of higher order-mode pass filter based on mode-scattering evolution.

Weifeng Jiang, Siqiang Mao, Jinzhu Hu

|August 2, 2024

Summary

This study presents a compact silicon higher-order mode (HOM) pass filter for mode-division multiplexing (MDM) systems. The device enables efficient mode-selective transmission on-chip, crucial for advanced optical communication networks.

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Last Updated: Jun 18, 2025

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Published on: August 12, 2013

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Area of Science:

Photonics
Integrated Optics
Optical Communications

Background:

Higher-order mode (HOM) pass filters are essential for on-chip mode-division multiplexing (MDM) systems.
These filters facilitate mode-selective transmission, a key requirement for increasing data capacity in optical networks.

Purpose of the Study:

To propose and experimentally validate a highly integrated silicon-based HOM pass filter.
To achieve compact footprint and efficient mode-selective filtering for on-chip MDM applications.

Main Methods:

Utilized a
mode-scattering evolution
approach for filter design.
Employed inverse design techniques to achieve a compact footprint (2 µm × 9 µm).
Fabricated and experimentally characterized the silicon-based HOM pass filter.

Main Results:

The fabricated filter demonstrated an insertion loss of 2.11 dB and a crosstalk of -10.63 dB at 1550 nm.
Achieved a bandwidth of 90 nm with an insertion loss below 5 dB.
The device exhibits efficient on-chip mode-selective filtering capabilities.

Conclusions:

The proposed silicon-based HOM pass filter offers an efficient solution for on-chip mode-selective filtering.
This technology holds promise for the development of integrated MDM systems.
The compact design and performance metrics make it suitable for advanced optical communication applications.