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Sugar Detection in Aqueous Solution Using an SMS Fiber Device.

Nailea Mar-Abundis1, Yadira Aracely Fuentes-Rubio1, René Fernando Domínguez-Cruz1

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Summary
This summary is machine-generated.

A novel fiber optic sensor using multimodal interference can detect sweetener concentrations in water. This simple device shows promise for distinguishing between different sugars like glucose, fructose, and sucrose.

Keywords:
fiber optics sensorfructoseglucosemultimode interferencesucrosesugar concentration

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Area of Science:

  • Optoelectronics
  • Chemical Sensing
  • Biomedical Engineering

Background:

  • Fiber optic sensors offer non-destructive and sensitive detection methods.
  • Multimodal interference (MMI) in fiber optics enables precise measurement of refractive index changes.
  • Sweetener detection in aqueous solutions is crucial for food quality control and health monitoring.

Purpose of the Study:

  • To fabricate and test a fiber optic sensor for detecting various sweeteners in water.
  • To investigate the sensor's performance in terms of sensitivity and resolution for different sugars.
  • To explore the potential for discriminating between different sweeteners based on their optical properties.

Main Methods:

  • Fabrication of a sensor using a coreless multimode fiber (NC-MMF) spliced between two single-mode fibers (SMFs) in an SMS configuration.
  • Utilizing the evanescent field of the NC-MMF to detect changes in the surrounding medium's refractive index.
  • Testing the sensor with aqueous solutions of glucose, fructose, and sucrose at concentrations from 0 to 20 wt% at room temperature.

Main Results:

  • The fiber optic sensor demonstrated a linear response to sweetener concentrations.
  • Achieved sensitivities of 0.1835 nm/wt% for sucrose, 0.1687 nm/wt% for fructose, and 0.1694 nm/wt% for glucose.
  • Sensing resolution was determined to be approximately 0.5 wt%, with potential for discriminating sugars via thermo-optical response.

Conclusions:

  • The developed SMS fiber optic sensor is effective for detecting and quantifying sweetener concentrations in water.
  • The sensor exhibits high sensitivity and resolution, suitable for practical applications.
  • Thermo-optical response analysis offers a pathway for differentiating between various sugars with similar concentration behaviors.