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Fiber-Optic Point-Based Sensor Using Specklegram Measurement.

Jiao-Jiao Wang1, Shao-Cheng Yan2, Ya-Ping Ruan3

  • 1College of Engineering and Applied Sciences, Nanjing University, Nanjing 210093, China. wangjiaojiao0719@163.com.

Sensors (Basel, Switzerland)
|October 25, 2017
PubMed
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This summary is machine-generated.

A novel fiber-optic sensor measures temperature and weight using correlated specklegrams from multimode fiber interference. This simple device also shows potential for refractive index sensing, with algorithm modifications enhancing sensitivity.

Area of Science:

  • Optoelectronics
  • Fiber optics
  • Sensor technology

Background:

  • Fiber-optic sensors offer precise measurements.
  • Spatial multimode interference (SMMI) can be exploited for sensing applications.
  • Developing robust and versatile fiber-optic sensors is an ongoing research area.

Purpose of the Study:

  • To report a novel fiber-optic point-based sensor.
  • To demonstrate its capability for measuring temperature and weight.
  • To explore its potential for refractive index sensing.

Main Methods:

  • Fabrication of the sensor by splicing a multimode fiber (MMF) to a single-mode fiber (SMF) with a core offset.
  • Utilizing correlated specklegrams induced by spatial multimode interference for measurement.
Keywords:
laser patternsspeckle correlationspeckle interferometry

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  • Experimental validation of the sensor's performance and potential applications.

    • Main Results:

    • An approximately linear relationship was observed between the correlation coefficient and variations in measured parameters.
    • The sensor successfully measured temperature and weight.
    • Potential for refractive index sensing was demonstrated by altering the fiber splice configuration.
    • Algorithm modifications were discussed to enhance sensor sensitivity.

    Conclusions:

    • The developed fiber-optic sensor is a simple yet effective device for measuring temperature and weight.
    • The sensor architecture shows promise for refractive index sensing applications.
    • Further algorithmic improvements can enhance the sensitivity of this fiber-optic sensing technology.