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Fiber Reinforced Concrete01:22

Fiber Reinforced Concrete

Fiber-reinforced concrete significantly enhances the structural and nonstructural properties of traditional concrete by incorporating fibers like steel, glass, and polymers. These fibers, varying from natural ones such as sisal and cellulose to manufactured ones like polypropylene and Kevlar, are mixed into hydraulic cement with aggregates. Steel fibers, often preferred for their robustness, contribute to improved ductility, toughness, and post-cracking performance. The concrete is classified...

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Related Experiment Video

Updated: Jul 2, 2026

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping
09:48

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping

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From Fiber Layout to the Sensor: Preparation Methods as Key Factors for High-Quality Coupled-Core-Fiber Sensors.

F Lindner1, J Bierlich1, M Alonso-Murias2

  • 1Leibniz Institute of Photonic Technology (Leibniz IPHT), 07745 Jena, Germany.

Sensors (Basel, Switzerland)
|November 9, 2024
PubMed
Summary
This summary is machine-generated.

Researchers developed a novel coupled-core fiber for simultaneous strain and temperature sensing, overcoming cross-sensitivity and reducing costs. This specialized fiber enables compact, high-speed interrogation units for advanced sensor applications.

Keywords:
MCVDREPUSILcoupled core fiberdoped silica glassfiber preparationoptical fiber sensors

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Area of Science:

  • Optoelectronics
  • Fiber optics
  • Sensor technology

Background:

  • Simultaneous strain and temperature sensing using optical fibers is crucial for applications in medicine, architecture, and aerospace.
  • Conventional fiber sensors face challenges with cross-sensitivity and high interrogation costs.
  • Specialized fiber layouts offer potential solutions to overcome these limitations.

Purpose of the Study:

  • To develop and evaluate a high-quality coupled-core fiber for advanced sensor applications.
  • To design a compact, high-speed, and cost-effective interrogation unit for the specialized fiber.
  • To demonstrate the ability to distinguish force or impact direction using the developed sensor system.

Main Methods:

  • Design and fabrication of a customized coupled-core fiber architecture.
  • Investigation of various fiber core material techniques and geometries.
  • Development of a novel interrogation unit to monitor reflectivity changes.
  • Evaluation of sensor performance for strain and temperature sensing, including directionality.

Main Results:

  • Successful development of a high-quality coupled-core fiber with specialized geometry.
  • Creation of a compact, high-speed, and cost-effective interrogation system.
  • Demonstrated capability of the sensor to monitor reflectivity changes and distinguish force direction.
  • Overcoming drawbacks of conventional fiber sensors, such as cross-sensitivity.

Conclusions:

  • The developed coupled-core fiber offers a promising solution for high-performance, cost-effective strain and temperature sensing.
  • The specialized fiber architecture and interrogation unit enable advanced monitoring capabilities, including impact direction detection.
  • This technology has significant potential for diverse applications requiring precise and robust sensing.