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Related Experiment Video

Updated: Jun 8, 2026

Quasi-light Storage for Optical Data Packets
07:45

Quasi-light Storage for Optical Data Packets

Published on: February 6, 2014

Free-space optical communications link budget estimation.

Larry B Stotts1, Paul Kolodzy, Alan Pike

  • 1Defense Advanced Research Projects Agency, 3701 North Fairfax Drive, Arlington, Virginia 22203, USA. larry.stotts@darpa.mil

Applied Optics
|October 2, 2010
PubMed
Summary
This summary is machine-generated.

This study introduces a new method for estimating free-space optical communication link budgets under severe turbulence. Adaptive optics are most effective within specific ranges, influencing signal prediction and power coupling.

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Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
09:43

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

Published on: March 20, 2017

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Last Updated: Jun 8, 2026

Quasi-light Storage for Optical Data Packets
07:45

Quasi-light Storage for Optical Data Packets

Published on: February 6, 2014

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
09:43

Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

Published on: March 20, 2017

Area of Science:

  • Optical Communications
  • Atmospheric Optics
  • Adaptive Optics

Background:

  • Severe atmospheric turbulence significantly impacts free-space optical (FSO) communication link budgets.
  • Adaptive optics (AO) systems are crucial for mitigating turbulence effects but have limitations.
  • The effectiveness of AO is influenced by factors like Rayleigh range, optical diameter, and wavelength.

Purpose of the Study:

  • To develop a novel methodology for estimating FSO link budgets in severe turbulence conditions.
  • To quantify the impact of turbulence on signal prediction and power coupling.
  • To compare theoretical predictions with field measurements.

Main Methods:

  • The methodology utilizes the Fried parameter calculated outside transmitter and receiver Rayleigh ranges.
  • It calculates Strehl ratios to predict light impinging on the receiving aperture.
  • Power coupling into the fiber is also estimated using this approach.

Main Results:

  • The study found that adaptive optics (AO) systems are most effective within the transmitter and receiver Rayleigh ranges.
  • AO effectiveness diminishes when the total communication range significantly exceeds the sum of these Rayleigh ranges.
  • The proposed method provides reasonable predictions for light impinging on the receiving telescope and fiber power coupling.

Conclusions:

  • The new methodology offers a more accurate way to estimate FSO link budgets under turbulent conditions.
  • Understanding the limitations of adaptive optics within specific ranges is key for system design.
  • The findings support the optimization of AO system parameters for enhanced FSO communication performance.