Related Experiment Video
Updated: Feb 11, 2026

Optical Scatter Microscopy Based on Two-Dimensional Gabor Filters
Published on: June 2, 2010
Enhanced Back-Scatter in double-pass optical links with non-classic turbulence
Abstract:
The average intensity, as well as the intensity-intensity correlation at one and two points of the He-Ne laser beam passing in the monostatic double-passage (21 meter long in single pass) atmospheric channel with a retro-reflector are measured experimentally. The non-classic turbulence is generated in two different ways: by means of a 1.8-meter long turbulent chamber with 3D distributed non-classic turbulence and a localized hot air jet-stream applied to the beam in a transverse direction. The Enhanced Back Scatterer (EBS) effects produced by the two types of turbulence are compared as turbulence is placed at various locations along the channel. The data reveals the spatial stability of the EBS intensity in the detected beam in both cases, while the whole beam centroid generally appears to be off-centered, due to deterministic and random temperature gradients. The strongest EBS effect was observed with the localized turbulence placed close to the retro-reflector. The studied situations may appear in urban/industrial/coastal atmosphere and are of importance for free-space optical communications with retro-modulation.
More Related Videos
Related Concept Videos
First Pass Effect
Depending on the route of administration, drugs can be metabolized in the liver, intestine, lungs, and vasculature. Orally administered drugs are first absorbed through the...
Laminar and Turbulent Flow
Classical Conditioning
Ivan Pavlov observed that dogs...
Turbulent Flow
Turbulent Flow: Problem Solving
Temperature is a key factor in CO2 solubility. In this case, the CO2 gas and the liquid are cooled to 20°C. Lower temperatures enhance...
Covalently Linked Protein Regulators
These groups modify specific amino acids in a protein....

