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Related Experiment Videos

Time-domain fiber laser hydrogen sensor.

Yu O Barmenkov1, A Ortigosa-Blanch, A Diez

  • 1Centro de Investigaciones en Optica, León, Guanajuato 37150, México.

Optics Letters
|December 9, 2004
PubMed
Summary
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A new fiber-optic sensor uses an erbium-doped fiber laser and a palladium-coated tapered fiber to detect hydrogen. Measuring the laser

Area of Science:

  • Optoelectronics and Photonics
  • Chemical Sensing Technologies
  • Fiber Optic Sensors

Background:

  • Hydrogen sensors are crucial for safety and industrial processes.
  • Existing fiber-optic sensors often face challenges in sensitivity and real-time monitoring.
  • Erbium-doped fiber lasers offer unique properties for sensing applications.

Purpose of the Study:

  • To develop a novel fiber-optic hydrogen sensor.
  • To utilize an erbium-doped fiber laser and a palladium-coated tapered fiber for hydrogen detection.
  • To translate hydrogen concentration measurement into the time domain via laser buildup time.

Main Methods:

  • A fiber-optic hydrogen sensor was designed using an erbium-doped fiber laser.
  • A palladium-coated tapered fiber was integrated within the laser cavity as the sensing element.

Related Experiment Videos

  • Hydrogen concentration was determined by measuring the laser buildup time, which correlates with changes in cavity losses.

    • Main Results:

    • The sensor demonstrated a direct correlation between hydrogen concentration and laser buildup time.
    • Relative variations in buildup time reached up to 55% for a 0-10% hydrogen concentration increase.
    • A high resolution of better than 0.1% for hydrogen concentration measurement was achieved.

    Conclusions:

    • The proposed fiber-optic sensor scheme offers a novel and effective method for hydrogen detection.
    • The technique successfully translates hydrogen concentration into the time domain by measuring laser buildup time.
    • This approach has potential for extension to other intensity-based fiber optic sensors.