Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Electronic Distance Measuring Instruments

Electronic Distance Measuring Instruments

Electronic Distance Measuring Instruments (EDMs) are essential tools in modern surveying, offering precise distance measurements by emitting electromagnetic signals and calculating the time required for these signals to travel to a target and return. Two primary types of signals are used in EDMs — light waves and microwaves — each suited to specific environmental and distance requirements. Light-wave-based EDMs utilize either infrared or laser light, providing high accuracy over...

Time and frequency -Domain Interpretation of Phase-lag Control

Time and frequency -Domain Interpretation of Phase-lag Control

Phase-lag controllers are widely used in control systems to improve stability and reduce steady-state errors. A dimmer switch controlling the brightness of a light bulb serves as a practical example of phase-lag control, gradually adjusting the bulb's brightness. Mathematically, phase-lag control or low-pass filtering is represented when the factor 'a' is less than 1.
Phase-lag controllers do not place a pole at zero, but instead influence the steady-state error by amplifying any...

Linear Approximation in Time Domain

Linear Approximation in Time Domain

Nonlinear systems often require sophisticated approaches for accurate modeling and analysis, with state-space representation being particularly effective. This method is especially useful for systems where variables and parameters vary with time or operating conditions, such as in a simple pendulum or a translational mechanical system with nonlinear springs.
For a simple pendulum with a mass evenly distributed along its length and the center of mass located at half the pendulum's length,...

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by

Same author

Adaptive-waist modes for free-space optical communications.

Optics letters·2025

Same author

Graph-based model for adaptive simulation of beam propagation in turbulent media.

Optics express·2023

Same author

Proof of concept for adaptive sequential optimization of free-space communication receivers.

Applied optics·2019

Same author

Intensity-based adaptive optics with sequential optimization for laser communications.

Optics express·2018

Same author

Effect of atmospheric anisoplanatism on earth-to-satellite time transfer over laser communication links.

Optics express·2017

Same author

Generation of atmospheric wavefronts using binary micromirror arrays.

Applied optics·2016

Search research articles

Related Experiment Video

Updated: Mar 8, 2026

Quasi-light Storage for Optical Data Packets

Quasi-light Storage for Optical Data Packets

Published on: February 6, 2014

Digital equalization of time-delay array receivers on coherent laser communications.

Aniceto Belmonte

|January 13, 2017

Summary

This study introduces a simpler method for laser communication systems to combat atmospheric turbulence. Using time-delay multi-aperture receivers with digital equalization offers a more versatile approach to reduce signal fading.

Area of Science:

Optical Engineering
Telecommunications

Background:

Coherent laser communication links suffer performance degradation due to atmospheric turbulence.
Field conjugation arrays offer a solution but require complex receivers for adaptive processing, co-phasing, and scaling of optical signals.

Purpose of the Study:

To investigate a simpler and more versatile method for mitigating atmospheric turbulence in coherent laser communication.
To demonstrate the effectiveness of digital equalization in multi-aperture receivers for diversity gain.

Main Methods:

Utilizing multiple apertures coupled with optical delay lines to combine retarded signal versions.
Employing digital equalization at a single coherent receiver to process combined signals.

Main Results:

More Related Videos

Differential Imaging of Biological Structures with Doubly-resonant Coherent Anti-stokes Raman Scattering CARS

Differential Imaging of Biological Structures with Doubly-resonant Coherent Anti-stokes Raman Scattering CARS

Published on: October 17, 2010

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Published on: January 28, 2019

Related Experiment Videos

Last Updated: Mar 8, 2026

Quasi-light Storage for Optical Data Packets

Quasi-light Storage for Optical Data Packets

Published on: February 6, 2014

Differential Imaging of Biological Structures with Doubly-resonant Coherent Anti-stokes Raman Scattering CARS

Differential Imaging of Biological Structures with Doubly-resonant Coherent Anti-stokes Raman Scattering CARS

Published on: October 17, 2010

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Published on: January 28, 2019

The proposed time-delay multi-aperture receiver with digital equalization achieves diversity gain against atmospheric fading.
This approach simplifies receiver complexity compared to traditional field conjugation arrays.

Conclusions:

Digital equalization of time-delay multi-aperture receivers presents a more straightforward and adaptable solution for reducing atmospheric fading in laser communication.
This method offers a promising alternative for enhancing the robustness of optical communication systems.