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Related Experiment Video

Updated: Jun 6, 2026

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response
09:03

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response

Published on: January 7, 2019

Multiplexed interferometric fiber-optic sensors with digital signal processing.

R Sadkowski, C E Lee, H F Taylor

    Applied Optics
    |November 10, 2010
    PubMed
    Summary
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    A novel digital signal processing system uses fiber-optic sensors to measure internal combustion engine pressure. This system accurately determines in-cylinder pressure by analyzing laser-modulated optical signals, enhancing engine performance monitoring.

    Area of Science:

    • Engineering
    • Optoelectronics
    • Signal Processing

    Background:

    • Accurate in-cylinder pressure measurement is crucial for internal combustion engine optimization.
    • Traditional pressure sensors face challenges in harsh engine environments.
    • Fiber-optic sensing offers a robust alternative for engine diagnostics.

    Purpose of the Study:

    • To develop and evaluate a microcontroller-based digital signal processing system for fiber-optic in-cylinder pressure measurement.
    • To utilize a modulated distributed feedback laser source with interferometric sensors.
    • To enable real-time pressure data acquisition in gasoline engines.

    Main Methods:

    • A distributed feedback laser source modulated with a sawtooth waveform powered four interferometric sensors.

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    Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
    09:43

    Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

    Published on: March 20, 2017

    Related Experiment Videos

    Last Updated: Jun 6, 2026

    A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response
    09:03

    A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response

    Published on: January 7, 2019

    Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
    09:43

    Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

    Published on: March 20, 2017

  • Interferometer phase shift was correlated with elapsed time and laser output power.
  • A digital timer-counter measured elapsed time, assumed to be linearly proportional to combustion pressure.
  • Fiber Fabry-Perot interferometer transducers were employed for measurements.

    • Main Results:

    • The system successfully measured in-cylinder pressure in a four-cylinder gasoline engine.
    • The digital signal processing approach provided a viable method for pressure determination.
    • The relationship between elapsed time and pressure was established for sensor calibration.

    Conclusions:

    • The developed microcontroller-based system offers an effective solution for fiber-optic in-cylinder pressure sensing.
    • This technology can enhance the understanding and control of internal combustion processes.
    • The system's design is suitable for real-time engine monitoring and diagnostics.