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Related Experiment Videos

Tunable-optical-filter-based white-light interferometry for sensing.

Bing Yu1, Anbo Wang, Gary Pickrell

  • 1Center for Photonics Technology, Bradley Department of Electrical and Computer Engineering, Virginia Polytechnic Institute and State University, Blacksburg, Virginia 24061, USA. biyu@vt.edu

Optics Letters
|July 13, 2005
PubMed
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This study introduces a low-cost tunable optical filter for white-light interferometry sensor interrogation. The method enables effective demodulation of various sensors, including temperature and pressure, using extrinsic Fabry-Perot interferometers.

Area of Science:

  • Optical Engineering
  • Sensor Technology
  • Interferometry

Background:

  • White-light interferometry (WLI) is a widely used technique for high-precision measurements.
  • Interrogating interferometric sensors, such as Fabry-Perot interferometers (FPIs), often requires complex and costly systems.
  • Developing cost-effective and versatile interrogation methods is crucial for broader sensor application.

Purpose of the Study:

  • To present a novel approach for sensor interrogation using a tunable optical filter integrated into a white-light interferometry system.
  • To demonstrate the adaptability of this system for interrogating different types of interferometric sensors.
  • To showcase a low-cost solution for quadrature demodulation and spectral-domain detection.

Main Methods:

  • Incorporation of a tunable optical filter into a standard white-light interferometry setup.

Related Experiment Videos

  • Utilizing the tunable filter for both quadrature demodulation and spectral-domain detection.
  • Experimental validation using extrinsic Fabry-Perot tunable filters to interrogate extrinsic Fabry-Perot interferometric (EFPI) sensors.

    • Main Results:

    • Successful interrogation of two EFPI temperature sensors.
    • Successful interrogation of a diaphragm-based pressure sensor.
    • Demonstrated feasibility of the tunable-optical-filter-based WLI system for diverse sensor types.

    Conclusions:

    • Tunable optical filters offer a cost-effective solution for white-light interferometry sensor interrogation.
    • The proposed method provides a versatile platform for demodulating various interferometric sensors.
    • This technique holds promise for advancing affordable and high-performance sensing applications.