Jove
Visualize
Contact Us
JoVE
x logofacebook logolinkedin logoyoutube logo
ABOUT JoVE
OverviewLeadershipBlogJoVE Help Center
AUTHORS
Publishing ProcessEditorial BoardScope & PoliciesPeer ReviewFAQSubmit
LIBRARIANS
TestimonialsSubscriptionsAccessResourcesLibrary Advisory BoardFAQ
RESEARCH
JoVE JournalMethods CollectionsJoVE Encyclopedia of ExperimentsArchive
EDUCATION
JoVE CoreJoVE BusinessJoVE Science EducationJoVE Lab ManualFaculty Resource CenterFaculty Site
Terms & Conditions of Use
Privacy Policy
Policies

Related Concept Videos

IR Spectrometers01:25

IR Spectrometers

1.5K
There are two main infrared (IR) spectrophotometers: dispersive IR spectrometers and Fourier transform infrared (FTIR) spectrometers. In a dispersive IR spectrometer, a beam of infrared radiation produced by a hot wire is divided into two parallel equal-intensity beams using mirrors. One beam passes through the sample, while another is a reference beam. The beams then move through the monochromator, which separates the radiations into a continuous spectrum of different frequencies. The...
1.5K

You might also read

Related Articles

Articles linked to this work by shared authors, journal, and citation graph.

Sort by
Same author

Determination of SRI values using TFBG and PTFBG based on the wavelength shift of modes, mode groups, and differential methods, considering the influence of polarization.

Optics express·2026
Same author

Demodulation of Fibre Bragg Grating Sensors by Using Cumulative Sum as a Preprocessing Method.

Sensors (Basel, Switzerland)·2025
Same author

The Impact of 1030 nm fs-Pulsed Laser on Enhanced Rayleigh Scattering in Optical Fibers.

Sensors (Basel, Switzerland)·2024
Same author

A Wavelet Derivative Spectrum Length Method of TFBG Sensor Demodulation.

Sensors (Basel, Switzerland)·2023
Same author

Information Conversion in Measuring Channels with Optoelectronic Sensors.

Sensors (Basel, Switzerland)·2022
Same author

Methods of Projecting Mode Amplitude Changes on the Wavelength Axis in Order to Determine the Bending Radius on the Basis of TFBG Grating Spectra.

Sensors (Basel, Switzerland)·2021

Related Experiment Video

Updated: Sep 29, 2025

Writing Bragg Gratings in Multicore Fibers
08:48

Writing Bragg Gratings in Multicore Fibers

Published on: April 20, 2016

8.3K

Single- and Double-Comb Tilted Fibre Bragg Grating Refractive Index Demodulation Methods with Fourier Transform

Sławomir Cięszczyk1, Krzysztof Skorupski1, Patryk Panas1

  • 1Institute of Electronics and Information Technology, Lublin University of Technology, 20-618 Lublin, Poland.

Sensors (Basel, Switzerland)
|March 26, 2022
PubMed
Summary

A novel double-comb Tilted fibre Bragg grating (DCTFBG) sensor enhances refractive index measurement. This fiber optic sensor achieves a resolution of 2 × 10-5 RIU using advanced spectral analysis techniques.

Keywords:
Fourier transformTFBG sensorsdouble combrefractive index

More Related Videos

Author Spotlight: Fabrication of a Low-Cost, Fiber-Coupled, and Air-Spaced Fabry-Pérot Etalon
07:22

Author Spotlight: Fabrication of a Low-Cost, Fiber-Coupled, and Air-Spaced Fabry-Pérot Etalon

Published on: February 3, 2023

6.4K
A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings
08:23

A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings

Published on: September 30, 2019

6.4K

Related Experiment Videos

Last Updated: Sep 29, 2025

Writing Bragg Gratings in Multicore Fibers
08:48

Writing Bragg Gratings in Multicore Fibers

Published on: April 20, 2016

8.3K
Author Spotlight: Fabrication of a Low-Cost, Fiber-Coupled, and Air-Spaced Fabry-Pérot Etalon
07:22

Author Spotlight: Fabrication of a Low-Cost, Fiber-Coupled, and Air-Spaced Fabry-Pérot Etalon

Published on: February 3, 2023

6.4K
A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings
08:23

A Random-displacement Measurement by Combining a Magnetic Scale and Two Fiber Bragg Gratings

Published on: September 30, 2019

6.4K

Area of Science:

  • Photonics and Optical Sensing
  • Materials Science
  • Signal Processing

Background:

  • Accurate refractive index (RI) measurement is crucial in various scientific and industrial applications.
  • Traditional fiber optic sensors often face limitations in resolution and sensitivity.
  • Development of new periodic structures and demodulation algorithms is key for advanced RI sensing.

Purpose of the Study:

  • To analyze the performance of a proposed double-comb Tilted fibre Bragg grating (DCTFBG) structure for refractive index measurement.
  • To compare the DCTFBG sensor's capabilities against a single classical fiber Bragg grating structure.
  • To introduce and evaluate novel data pre-processing and quantitative analysis algorithms for spectral data.

Main Methods:

  • Utilized a DCTFBG structure, analyzing its spectral response to changes in refractive index.
  • Employed Fourier Transform for pre-processing and filtering optical spectra in the frequency domain.
  • Applied Hilbert transform for envelope detection and developed algorithms based on spectrum contour length and feature shifts for quantitative analysis.

Main Results:

  • Demonstrated that increasing the number of modes in the DCTFBG significantly alters the Fourier spectrum.
  • Successfully implemented Fourier Transform as an effective filtering method for spectral data.
  • Achieved a high measurement resolution of 2 × 10-5 refractive index unit (RIU) using the developed demodulation algorithms.

Conclusions:

  • The DCTFBG structure offers a promising platform for enhanced refractive index sensing.
  • The proposed Fourier Transform filtering and novel quantitative analysis algorithms significantly improve measurement accuracy and resolution.
  • The developed fiber optic sensing methodology provides a robust solution for precise refractive index determination.