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Microfiber optical sensors: a review.

Jingyi Lou1, Yipei Wang2, Limin Tong3

  • 1College of Science, Zhejiang University of Science and Technology, Hangzhou 310023, China. loujingyi@zust.edu.cn.

Sensors (Basel, Switzerland)
|March 28, 2014
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Summary
This summary is machine-generated.

Optical microfibers offer unique waveguiding properties for developing miniaturized fiber optic sensors. This review covers their fabrication, properties, and applications in sensing various parameters like temperature and refractive index.

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Area of Science:

  • Photonics and optical engineering
  • Materials science
  • Sensor technology

Background:

  • Optical microfibers exhibit unique waveguiding properties due to their small diameter and high index contrast.
  • These properties enable applications in miniaturized fiber optic sensors with enhanced sensitivity and fast response.
  • Optical sensing using microfibers is an area of increasing research interest.

Purpose of the Study:

  • To review recent advancements in microfiber optical sensors.
  • To summarize fabrication techniques, waveguide properties, and sensing applications of optical microfibers.
  • To provide an outlook on future challenges and opportunities in this field.

Main Methods:

  • Review of existing literature on microfiber optical sensors.
  • Summarization of typical microfiber-based sensing structures (biconical tapers, gratings, cavities, interferometers, coated/doped microfibers).
  • Categorization of sensors based on sensing structures and measured parameters (refractive index, concentration, temperature, humidity, strain, current).

Main Results:

  • Optical microfibers demonstrate tailorable optical confinement and evanescent fields, suitable for sensing.
  • Various microfiber-based sensing structures have been developed for diverse applications.
  • Sensors are effective in both gas and liquid environments for measuring multiple physical and chemical parameters.

Conclusions:

  • Microfiber optical sensors offer a promising platform for high-performance sensing applications.
  • Continued research in fabrication and functionalization will expand their capabilities.
  • Future work should address challenges and explore new opportunities for microfiber sensor development.