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Coulometry is one of the rapid, most accurate, and precise analytical techniques that determine the quantity of an analyte by measuring the electrical charge needed for its complete electrolysis without using any analytical standards. The total charge passed during electrolysis correlates with the analyte amount by Faraday's laws of electrolysis. For accurate coulometric measurements, a charge equal to Faraday's constant multiplied by the number of electrons involved in the relevant...

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Highly Coupled Seven-Core Fiber for Ratiometric Anti-Phase Sensing.

Natanael Cuando-Espitia1, Andrés Camarillo-Avilés2, Daniel A May-Arrioja2,3

  • 1CONACyT-Electronics Department, University of Guanajuato, Carr. Salamanca-Valle de Santiago Km 3.5 + 1.8, Salamanca 36885, Mexico.

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Summary
This summary is machine-generated.

This study introduces a novel fiber optic temperature sensor using a seven-core fiber (SCF). The sensor offers robust, low-cost, and wide-range temperature detection for industrial applications.

Keywords:
fiber optic sensorsmulticore fiberthermal sensors

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Area of Science:

  • Optoelectronics
  • Fiber optics sensing
  • Material science

Background:

  • Accurate temperature sensing is critical for industrial processes.
  • Existing fiber optic sensors face challenges with robustness and cost.
  • Seven-core fiber (SCF) offers unique spectral properties for sensor development.

Purpose of the Study:

  • To propose and demonstrate a ratiometric fiber optic temperature sensor.
  • To analyze the spectral response of SCF for temperature sensing.
  • To evaluate the sensor's performance, robustness, and suitability for industrial use.

Main Methods:

  • Fabrication of the sensor by splicing a 2 cm SCF segment between single-mode fibers (SMFs).
  • Utilizing two SCF devices with anti-phase transmission spectra for ratiometric measurement.
  • Experimental demonstration of temperature sensing from 25 °C to 400 °C.

Main Results:

  • The sensor exhibits a sinusoidal spectral response.
  • Demonstrated robustness against light source fluctuations (0.2% standard deviation for a 12% variation).
  • Achieved a wide temperature detection range of 25 °C to 400 °C.

Conclusions:

  • The proposed ratiometric SCF sensor is a simple, low-cost, and robust solution.
  • Its performance characteristics make it highly promising for industrial temperature monitoring.
  • This technology offers a viable alternative for demanding industrial environments.