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Related Experiment Video

Updated: Jul 9, 2026

Fabrication and Testing of Microfluidic Optomechanical Oscillators
09:10

Fabrication and Testing of Microfluidic Optomechanical Oscillators

Published on: May 29, 2014

Fundamental study to develop a fiber-optic gap sensor for a rotary undulation pump.

Norihiko Mitsumune1, Itsuro Saito, Shuichi Mochizuki

  • 1Department of Artificial Biomechanism, Research Center for Advanced Science and Technology, the University of Tokyo, 4-6-1 Komaba, Meguro-ku, Tokyo 153-8904, Japan. norihiko@bme.rcast.u-tokyo.ac.jp

Journal of Artificial Organs : the Official Journal of the Japanese Society for Artificial Organs
|December 12, 2007
PubMed
Summary

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A fiber-optic gap sensor shows promise for controlling the rotor position in rotary undulation pumps, a key component for next-generation artificial hearts. This technology enables dynamic gap control for improved artificial heart function.

Area of Science:

  • Biomedical Engineering
  • Medical Devices
  • Sensor Technology

Background:

  • Rotary undulation pumps are potential candidates for artificial hearts.
  • Dynamic gap control is crucial for rotor stability in these pumps.
  • Magnetic levitation is desired for rotor support.

Purpose of the Study:

  • To investigate the applicability of a fiber-optic gap sensor for dynamic position control of the rotor in a rotary undulation pump.
  • To assess the sensor's performance in various media and under different conditions.

Main Methods:

  • Developed a fiber-optic gap sensor using two plastic-core fibers and a reflection plate.
  • Tested the sensor with four different light sources in air, saline, and blood with varying hematocrit levels.
  • Evaluated the influence of blood oxygen saturation and fiber distance on sensing capabilities.

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Last Updated: Jul 9, 2026

Fabrication and Testing of Microfluidic Optomechanical Oscillators
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Published on: May 29, 2014

Implementation of a Reference Interferometer for Nanodetection
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Main Results:

  • The fiber-optic gap sensor demonstrated effectiveness in sensing the rotor's position.
  • Performance varied with different light sources and media, with specific wavelengths showing better suitability for blood.
  • The distance between optical fibers impacted sensing range and accuracy.

Conclusions:

  • Fiber-optic gap sensors are a promising technology for active rotor positioning in rotary undulation pumps.
  • Further optimization of light source selection and sensor configuration is recommended for clinical application.