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Ultrasonic signal detection based on Fabry-Perot cavity sensor.

Wu Yang1, Chonglei Zhang2, Jiaqi Zeng1

  • 1Nanophotonics Research Center, Shenzhen University, Shenzhen, 518000, China.

Visual Computing for Industry, Biomedicine, and Art
|April 8, 2021
PubMed
Summary

Researchers developed a compact fiber optic ultrasonic sensor using a Fabry-Perot cavity for high-precision acoustic measurements. This innovative sensor is ideal for biomedical applications like photoacoustic imaging and medical diagnosis.

Keywords:
Acoustic sensorDouble-clad fiberEndoscopic photoacoustic imagingFabry–Perot microcavityFull-optical detectionTwo-photon 3D lithography machine

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Area of Science:

  • Photonics and Sensor Technology
  • Biomedical Engineering

Background:

  • Acoustic/ultrasonic sensors convert mechanical energy to electrical signals.
  • Traditional ultrasonic detectors can be bulky.
  • Fiber optic sensors offer miniaturization potential.

Purpose of the Study:

  • To develop and characterize a novel, miniaturized fiber optic ultrasonic sensor.
  • To demonstrate its feasibility for high-precision acoustic measurements.
  • To explore its application in photoacoustic signal detection for biomedical fields.

Main Methods:

  • Fabrication of a Fabry-Perot cavity on a double-clad fiber end face using two-photon three-dimensional lithography.
  • Characterization of the sensor's performance for ultrasonic signal detection.
  • Experimental validation of its precision and feasibility.

Main Results:

  • A microcavity sensing unit with a diameter of 30 μm was successfully fabricated.
  • The sensor demonstrated high precision in measuring ultrasonic signals.
  • Experimental results proved the sensor's feasibility and effectiveness.

Conclusions:

  • The developed fiber optic ultrasonic sensor offers a compact and high-precision alternative to larger ultrasonic detectors.
  • Its small size and capabilities make it suitable for photoacoustic signal detection.
  • Potential applications include medical diagnosis, photoacoustic endoscopy, and photoacoustic imaging in biomedical information technology.