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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

Spatial-domain-based multidimensional modulation for multi-Tb/s serial optical transmission.

Ivan B Djordjevic¹, Murat Arabaci, Lei Xu

¹University of Arizona, Department of Electrical & Computer Engineering, Tucson, Arizona 85721, USA. ivan@ece.arizona.edu

|April 1, 2011

Summary

Harnessing multiple photon properties like polarization and orbital angular momentum (OAM) significantly boosts spectral efficiency in optical networks. This research introduces a novel spatial-domain scheme for ultra-high capacity fiber-optic communications.

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Last Updated: Jun 3, 2026

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

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Published on: March 20, 2017

Quasi-light Storage for Optical Data Packets

Quasi-light Storage for Optical Data Packets

Published on: February 6, 2014

Area of Science:

Photonics and Optical Communications
Information Theory
Digital Signal Processing

Background:

Current fiber-optic systems are limited by spectral efficiency.
Photons possess multiple degrees of freedom (e.g., polarization, OAM) that can be exploited for data transmission.
Orbital Angular Momentum (OAM) offers orthogonality for potentially infinite bits per photon.

Purpose of the Study:

To propose a spatial-domain-based multidimensional coded-modulation scheme.
To enable multi-Terabit per second (multi-Tb/s) serial optical transport.
To enhance spectral efficiency and bits-per-photon in optical networks.

Main Methods:

Investigated multidimensional channel capacity using multiple photon degrees of freedom.
Developed and analyzed an eight-dimensional (8D) spatial-domain coded modulation scheme.
Compared the proposed 8D scheme against prior 4D and polarization-multiplexed Quadrature Amplitude Modulation (QAM) systems.

Main Results:

The proposed 8D scheme significantly improves spectral efficiency, exceeding current fiber-optic experiment records.
Demonstrated a 3.88 dB performance gain over a 128-point 4D scheme at a Bit Error Rate (BER) of 10^-8.
Achieved 120 Gb/s higher aggregate information bit rate compared to the 4D scheme.
Outperformed conventional polarization-multiplexed QAM by 8.39 dB at a BER of 10^-8.

Conclusions:

The spatial-domain multidimensional coded-modulation scheme is a key enabling technology for future ultra-high capacity optical networks.
Exploiting OAM and other photon degrees of freedom offers revolutionary improvements in spectral efficiency.
The proposed 8D scheme provides substantial gains in both data rate and signal quality over existing technologies.