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Updated: Sep 11, 2025

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

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On-chip mode multiplexing communication based on pixelated superstructure duty cycle optimization.

Chaofeng Wang, Houwen Liu, Xue Long

|August 13, 2025

Summary

This summary is machine-generated.

This study introduces an optimized pixelated superstructure for mode multiplexers, enhancing on-chip optical communication performance. The new method reduces fabrication errors, improving data transmission efficiency and lowering insertion loss.

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Published on: December 11, 2014

Area of Science:

Photonics and Optical Communications
Nanotechnology and Metamaterials

Background:

On-chip optical communication demands high-capacity solutions like mode multiplexing.
Sub-wavelength pixelated superstructures offer compact mode multiplexers but suffer from fabrication deviations.
Fabrication errors degrade the performance of mode multiplexers in optical communication systems.

Purpose of the Study:

To develop a pixelated superstructure duty cycle optimization strategy for mode multiplexers.
To mitigate the impact of fabrication deviations on device performance.
To enhance the capacity and efficiency of on-chip optical communication.

Main Methods:

Proposed a duty cycle optimization strategy by eliminating pixels below a Figure of Merit threshold.
Reduced the number of cylindrical air holes in the pixelated superstructure.
Employed a roulette method for pixel updating and random mutation to avoid local optima.

Main Results:

Achieved a duty cycle improvement from 20.6% to 13.9%.
Demonstrated a three-mode multiplexer (TE0, TE1, TE2) transmitting 72 Gbit/s QPSK-OFDM signals.
Reduced insertion loss by 1.9–2.8 dB and optimized communication sensitivity by 1.5 dB at 1550 nm compared to direct binary search.

Conclusions:

The proposed optimization strategy effectively reduces fabrication deviation impact on mode multiplexers.
This approach enhances performance metrics like insertion loss and communication sensitivity.
The work provides a new technological path for high-capacity on-chip optical communications.