Related Experiment Video
Updated: Mar 12, 2026

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
Published on: March 20, 2017
Joint tracking and equalization scheme for multi-polarization effects in coherent optical communication systems.
This study introduces a novel method using two extended Kalman filters for simultaneous tracking and equalization of polarization effects in coherent optical systems. It effectively addresses polarization-dependent loss and dispersion, enhancing signal quality.
Area of Science:
- Optical Communications Engineering
- Signal Processing
- Information Theory
Background:
- Polarization effects like polarization-dependent loss (PDL) and polarization mode dispersion (PMD) significantly degrade performance in Polarization Division Multiplexing (PDM) coherent optical systems.
- Accurate tracking of the state of polarization (SOP) and effective equalization are crucial for reliable data transmission in these systems.
- Existing methods often struggle with simultaneous compensation of multiple polarization impairments.
Purpose of the Study:
- To develop a joint method for tracking state of polarization (SOP) and equalizing polarization impairments in PDM-M-QAM systems.
- To address the challenges of simultaneous compensation for PDL and PMD.
- To improve the overall performance and robustness of coherent optical communication systems.
Main Methods:
- A novel joint multi-polarization-effect tracking and equalization method is proposed.
- The method utilizes two extended Kalman filters for simultaneous processing.
- Mathematical modeling and detailed analysis of the proposed method are provided.
Main Results:
- The proposed method demonstrates high effectiveness in a 28 Gbaud/s PDM-16QAM system simulation.
- Achieved SOP tracing speeds of 110 Mrad/s (azimuth) and 1200 krad/s (phase).
- Simultaneous equalization of PDL (up to 10 dB) and PMD (over half symbol period) is achieved.
Conclusions:
- The proposed joint method offers a robust solution for managing multiple polarization effects in advanced coherent optical systems.
- The extended Kalman filter-based approach provides efficient and simultaneous compensation.
- This technique significantly enhances the performance of PDM-M-QAM systems under challenging conditions.
More Related Videos
14:18Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
Published on: February 28, 2016
07:56A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
Published on: September 5, 2019
Related Concept Videos
Group Polarization
Linear Approximation in Frequency Domain
In contrast, nonlinear systems do not inherently possess these properties. However, for small deviations around an operating point, a nonlinear system can often be approximated as linear....
¹³C NMR: Distortionless Enhancement by Polarization Transfer (DEPT)
Differential Leveling
Transmission Line Design Considerations
Linear Approximation in Time Domain
For a simple pendulum with a mass evenly distributed along its length and the center of mass located at half the pendulum's length,...