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Related Concept Videos

Skewness01:06

Skewness

17.1K
The measures of central tendency calculated from a data set may not reveal much about its intrinsic distribution. If a plot is made of the data set’s values, the mean and the median may not only differ, but also the plot may have more values on one side of the central tendencies. Such a data set is said to be skewed towards that side.
The longer the tail of the plot on one side, the more skewed it is. The skewness of a data set’s values suggests that the measures of central tendency...
17.1K

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Related Experiment Video

Updated: Dec 22, 2025

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping
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Fiber-Optic Skew Ray Sensors.

George Y Chen1, Jinyu Wang2, David G Lancaster1

  • 1Laser Physics and Photonic Devices Laboratories, School of Engineering, University of South Australia, Mawson Lakes, 5095 SA, Australia.

Sensors (Basel, Switzerland)
|May 2, 2020
PubMed
Summary

Skew rays in multimode fibers enhance sensor sensitivity by increasing light-matter interactions. This approach offers a robust and efficient method for developing advanced fiber optic sensors.

Keywords:
evanescent fieldmultimode fiberray opticssensorskew ray

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Area of Science:

  • Optics
  • Fiber Optics
  • Sensor Technology

Background:

  • Evanescent fields in multimode fibers are typically weak, limiting sensor sensitivity.
  • Traditional methods often face challenges with laser-induced damage and photobleaching.
  • Interferometric techniques can be susceptible to temperature fluctuations.

Purpose of the Study:

  • To review the development and application of skew rays in multimode fiber sensors.
  • To highlight the benefits of using skew rays for enhanced light-matter interactions.
  • To discuss the challenges and future prospects of this sensing technology.

Main Methods:

  • Exploiting skew rays for increased total internal reflections within multimode fibers.
  • Utilizing the comprehensive spread of skew rays over the fiber surface.
  • Employing power-dependent measurements for enhanced sensitivity and reduced temperature susceptibility.

Main Results:

  • Skew rays significantly increase the interaction area for light-matter, boosting sensor sensitivity.
  • Uniform light-matter distribution mitigates risks of coating damage and photobleaching.
  • Power-dependent measurements offer a robust alternative to interferometric techniques with relaxed laser source requirements.

Conclusions:

  • Skew ray exploitation is a promising strategy for developing highly sensitive and robust multimode fiber optic sensors.
  • This approach enhances light-matter interaction uniformity, improving performance and durability.
  • Further development holds potential for advanced applications in various sensing fields.