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Related Concept Videos

Measurements of Strain01:27

Measurements of Strain

2.0K
Strain quantifies the deformation of a material under force, typically measured as normal strain, which represents the change in length when compared with the original length. Electrical strain gauges are used for enhanced accuracy. These devices consist of a conductive wire mounted on a paper backing that adheres to the material's surface. These gauges operate on the piezoresistive effect, where the wire's electrical resistance changes in response to mechanical deformation. The strain...
2.0K

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Updated: Aug 27, 2025

Fiber Optic Distributed Sensors for High-resolution Temperature Field Mapping
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A Dual-Wavelength Fiber Laser Sensor with Temperature and Strain Discrimination.

Arturo Sanchez-Gonzalez1,2, Rosa Ana Perez-Herrera1,2, Pablo Roldan-Varona3,4,5

  • 1Department of Electrical, Electronic and Communication Engineering, Public University of Navarra, 31006 Pamplona, Spain.

Sensors (Basel, Switzerland)
|September 23, 2022
PubMed
Summary
This summary is machine-generated.

This study introduces a novel dual-wavelength fiber laser using an artificial backscatter reflector. This laser system demonstrates high stability and equalization, enabling simultaneous strain and temperature sensing.

Keywords:
C-bandartificial backscatter reflectorerbium-doped fiber laserfemtosecond laserlongitudinal mode behaviormultiparameter sensorrandom fiber gratingsimultaneous measurement

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Area of Science:

  • Photonics and Optical Engineering
  • Fiber Optic Sensing
  • Laser Technology

Background:

  • Dual-wavelength fiber lasers are crucial for advanced sensing applications.
  • Developing stable and equalized dual-emission lasers remains a challenge.
  • Artificial reflectors offer potential for novel fiber laser designs.

Purpose of the Study:

  • To present a dual-wavelength C-band erbium-doped fiber laser.
  • To utilize an artificial backscatter reflector for laser enhancement.
  • To investigate the laser's performance for simultaneous strain and temperature sensing.

Main Methods:

  • Fabrication of a 32 mm fiber-based artificial backscatter reflector using femtosecond laser direct writing.
  • Construction of a dual-wavelength erbium-doped fiber laser system.
  • Characterization of laser parameters including wavelength, signal-to-noise ratio, power difference, stability, and threshold pump power.
  • Evaluation of the laser's sensing capabilities for strain and temperature.

Main Results:

  • Achieved dual-wavelength emission centered at 1527.7 nm and 1530.81 nm with an optical signal-to-noise ratio over 46 dB at 150 mW pump power.
  • Demonstrated high channel equalization with a power difference of only 0.02 dB.
  • Observed low output power (0.3 dB) and central wavelength (0.01 nm) instability.
  • Measured a threshold pump power of 40 mW.
  • Successfully performed simultaneous strain and temperature measurements with sensitivities of 1 pm/με and 9.29 pm/°C, respectively.

Conclusions:

  • The proposed dual-wavelength fiber laser, enhanced by an artificial backscatter reflector, exhibits excellent performance characteristics.
  • The laser's high stability, equalization, and dual-emission capability make it suitable for advanced sensing applications.
  • This technology enables the simultaneous and accurate measurement of strain and temperature using a single fiber optic system.