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Related Experiment Video

Updated: Jun 19, 2026

Implementation of a Reference Interferometer for Nanodetection
16:11

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Published on: April 26, 2014

Macrobending single-mode fiber-based refractometer.

Pengfei Wang1, Yuliya Semenova, Qiang Wu

  • 1Photonics Research Center, School of Electronic and Communications Engineering,Dublin Institute of Technology, Kevin Street, Dublin 8, Ireland. pwang@dit.ie

Applied Optics
|November 3, 2009
PubMed
Summary
This summary is machine-generated.

This study introduces a simple fiber optic refractometer sensor using macrobending. The sensor achieves a high resolution of 5.75x10(-5) for refractive index measurements.

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Area of Science:

  • Optics and Photonics
  • Fiber Optic Sensors
  • Refractometry

Background:

  • Refractive index sensing is crucial in various scientific fields.
  • Existing fiber optic sensors often require complex configurations.
  • Developing simple, high-resolution sensors is an ongoing challenge.

Purpose of the Study:

  • To propose and investigate a novel macrobending-based all-fiber refractometer sensor.
  • To demonstrate a simple optical configuration for enhanced sensing.
  • To improve the resolution of fiber optic refractometers.

Main Methods:

  • Theoretical analysis using scalar approximation theory.
  • Experimental investigation of a single-loop macrobending fiber structure.
  • Utilizing standard single-mode fiber (SMF28) with reduced cladding diameter and specific bending radius.

Main Results:

  • The proposed sensor configuration is theoretically predicted and experimentally verified.
  • A resolution of 5.75x10(-5) was achieved for refractive index measurements.
  • The sensor operates effectively within a refractive index range of 1.4586 to 1.5396 at 1550 nm wavelength.

Conclusions:

  • A simple, macrobending-based all-fiber refractometer sensor is successfully developed.
  • The sensor demonstrates high resolution and practical applicability for refractive index sensing.
  • The design offers a promising solution for advanced optical sensing applications.