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Related Concept Videos

Determination of Crystal Structures01:29

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In the late 1800s, the revelation that light extended beyond visible wavelengths led to the discovery of X-rays by Wilhelm Roentgen. Recognized as high-energy electromagnetic radiation with short wavelengths, X-rays prompted exploration into their interaction with crystals. Max von Laue proposed in 1912 that the periodic arrangement of atoms, ions, or molecules in crystals would cause them to diffract X-rays, a hypothesis confirmed through experiments with copper sulfate and zinc sulfide...
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Updated: Jun 25, 2026

Implementation of a Reference Interferometer for Nanodetection
16:11

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Published on: April 26, 2014

Refractometry based on a photonic crystal fiber interferometer.

Rajan Jha1, Joel Villatoro, Gonçal Badenes

  • 1ICFO-Institut de Ciències Fotòniques, Mediterranean Technology Park, Castelldefels (Barcelona), Spain. rajaniitd@gmail.com

Optics Letters
|March 3, 2009
PubMed
Summary
This summary is machine-generated.

A novel photonic crystal fiber interferometer offers stable, compact, and sensitive refractive index measurements. This device utilizes collapsed fiber voids to couple core and cladding modes for precise refractometry.

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Area of Science:

  • Optics and Photonics
  • Materials Science

Background:

  • Refractometry requires precise and stable optical measurement devices.
  • Photonic crystal fibers (PCF) offer unique light manipulation properties.

Purpose of the Study:

  • To develop a simple, compact, and stable modal interferometer for refractometry.
  • To utilize PCF for enhanced refractive index sensing capabilities.

Main Methods:

  • Fabrication of a modal interferometer by splicing a large-mode-area PCF stub between standard single-mode fibers.
  • Inducing full collapse of PCF voids in splice regions to enable mode coupling.
  • Monitoring shifts in the interference pattern to measure refractive index.

Main Results:

  • The developed interferometer is compact and highly stable over time.
  • The device exhibits low temperature sensitivity.
  • Accurate refractive index measurements were achieved in the 1.330-1.440 range.

Conclusions:

  • The PCF-based modal interferometer is a promising tool for refractometry.
  • The simple design and robust performance make it suitable for various applications.
  • The technique allows for precise refractive index determination through interference pattern analysis.