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Related Experiment Video

Updated: May 17, 2026

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

Published on: March 20, 2017

Partitioned constellation shaping based on index-driven coding for OFDM transmission over seven-core fiber.

Shengjie Chen, Bo Liu, Jianxin Ren

|May 15, 2026

Summary

This study introduces a novel probabilistic shaping modulation for optical systems. The index-driven constellation partitioning reduces average transmit power, improving energy efficiency in fiber optic communications.

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Last Updated: May 17, 2026

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

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Area of Science:

Optical Communications
Digital Signal Processing
Information Theory

Background:

Probabilistic shaping is crucial for optimizing optical communication systems.
Reducing average transmit power is key to enhancing energy efficiency.
Constellation partitioning offers a method for implementing probabilistic shaping.

Purpose of the Study:

To propose a novel probabilistic shaping modulation scheme based on index-driven constellation partitioning.
To reduce the average transmit power of optical signals.
To evaluate the performance of the proposed scheme in a fiber optic system.

Main Methods:

Dividing the 32QAM constellation into eight non-overlapping energy-level patterns.
Grouping three consecutive subcarriers as a mapping unit controlled by index bits and a lookup table.
Assigning more subcarriers to low-energy constellation modes to increase their activation probability.

Main Results:

The proposed index-driven constellation-shaped signal achieved up to 0.53 dB gain compared to uniform 32QAM at a BER of 3.8 × 10⁻³.
BER performance variation among different modes remained below 0.5 dB.
The scheme demonstrated low implementation complexity.

Conclusions:

The proposed probabilistic shaping modulation scheme effectively reduces average transmit power.
The scheme offers significant performance gains in optical fiber systems.
It shows promising potential for multi-user optical access networks due to its efficiency and low complexity.