Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Search research articles

Related Experiment Video

Updated: May 9, 2026

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

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

Published on: September 30, 2019

High-sensitivity bend angle measurements using optical fiber gratings.

Abdul Rauf¹, Jianlin Zhao, Biqiang Jiang

¹Shaanxi Key Laboratory of Optical Information Technology, Ministry of Education, School of Science, Northwestern Polytechnical University, Xi’an 710072, China.

|July 23, 2013

Summary

We developed a flexible bend measurement method using optical fiber gratings. The double fiber Bragg grating (FBG) scheme doubles sensitivity for enhanced bend detection.

Related Concept Videos

You might also read

Related Articles

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

Sort by

Same author

Dopant-driven photonic nonlinear optical responses in Mg<sub>4</sub>O<sub>3</sub> electrides.

RSC advances·2026

Same author

Cerium-modified niobium oxide/reduced graphene oxide (Ce-Nb<sub>2</sub>O<sub>5</sub>/r-GO) hybrid: advances in charge transport dynamics for photocatalytic applications.

RSC advances·2026

Same author

15-Crown-5-based metalides: computational insights into excess electrons and enhanced NLO response.

Journal of molecular modeling·2026

Same author

Excitation and Tuning of Fano-like Resonances in Whispering Gallery Microcavity and Microfiber Modal Interferometer Coupled System.

Sensors (Basel, Switzerland)·2026

Same author

Phytochemical constituents, nutritional value, and biological activities of <i>Lupinus albus</i>: a review.

Natural product research·2026

Same author

Dynamic characterization of humidity-induced perovskite/polyacrylonitrile composite nanofibers based on tilted fiber grating.

Optics express·2026

Area of Science:

Optoelectronics
Fiber Optics Sensing
Materials Science

Background:

Accurate bend measurement is crucial for various applications.
Existing fiber optic bend sensors have limitations in sensitivity and flexibility.
Optical fiber gratings offer unique properties for sensing applications.

Purpose of the Study:

To present a novel, high-sensitivity, and flexible bend measurement method.
To investigate the performance of different optical fiber grating configurations for bend sensing.
To optimize the bend sensing performance through fiber diameter modification.

Main Methods:

Utilizing the coupling of core mode to cladding modes in a bending region.
Employing optical fiber gratings (FBG, CFBG, double FBG) as band reflectors.

More Related Videos

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response

Published on: January 7, 2019

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

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

Published on: February 3, 2023

Related Experiment Videos

Last Updated: May 9, 2026

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

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

Published on: September 30, 2019

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response

Published on: January 7, 2019

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

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

Published on: February 3, 2023

Experimentally measuring bend loss curves for coated, stripped, and etched fiber sections.

Analyzing the effect of separation between the bending region and the grating.

Investigating bend loss response for different fiber diameters achieved via etching.

Main Results:

The double FBG configuration demonstrated twice the sensitivity of single FBG and CFBG.
Sensitivity was significantly increased, and the dead-zone reduced by etching the fiber.
The separation distance between the bending region and the grating impacts loss response.
Coated, stripped, and etched fiber sections exhibited distinct bend loss characteristics.

Conclusions:

The double FBG scheme acts as a sensitivity multiplier for bend measurement.
Fiber etching in hydrofluoric acid enhances bend sensing sensitivity and reduces dead-zone.
The proposed method offers a flexible and high-sensitivity solution for bend detection.