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Related Concept Videos

Raman Spectroscopy Instrumentation: Overview01:26

Raman Spectroscopy Instrumentation: Overview

A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...

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Updated: May 13, 2026

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response
09:03

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

Published on: January 7, 2019

High-performance hybrid Raman/fiber Bragg grating fiber-optic sensor based on simplex cyclic pulse coding.

M Taki1, F Zaidi, I Toccafondo

  • 1Scuola Superiore Sant’Anna, via G. Moruzzi 1, Pisa 56124, Italy. m.taki@sssup.it

Optics Letters
|March 5, 2013
PubMed
Summary
This summary is machine-generated.

Cyclic pulse coding enhances hybrid Raman/fiber Bragg grating (FBG) sensors for simultaneous temperature and strain measurement. This method improves noise reduction and sensing resolution for advanced fiber-optic sensing applications.

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Last Updated: May 13, 2026

A Silicon-tipped Fiber-optic Sensing Platform with High Resolution and Fast Response
09:03

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

Published on: January 7, 2019

Writing Bragg Gratings in Multicore Fibers
08:48

Writing Bragg Gratings in Multicore Fibers

Published on: April 20, 2016

Area of Science:

  • Optoelectronics and Photonics
  • Fiber Optic Sensing Technology
  • Advanced Material Science

Background:

  • Hybrid fiber-optic sensors offer potential for multiplexed measurements.
  • Simultaneous distributed temperature and dynamic strain sensing presents significant challenges.
  • Existing methods often suffer from noise and limited resolution.

Purpose of the Study:

  • To introduce and validate cyclic pulse coding for hybrid Raman/FBG sensors.
  • To achieve simultaneous distributed static temperature and discrete dynamic strain measurements.
  • To enhance the performance metrics of fiber-optic sensing systems.

Main Methods:

  • Implementation of cyclic pulse coding for signal processing.
  • Utilizing hybrid Raman optical time-domain reflectometry and fiber Bragg grating interrogation.
  • Employing broadband apodized low-reflectivity FBGs with a single narrowband optical source and shared receiver.

Main Results:

  • Demonstrated effective noise reduction in both Raman and FBG sensing channels.
  • Achieved enhanced sensing range resolution for temperature measurements.
  • Provided real-time point dynamic strain measurement capabilities with improved accuracy.

Conclusions:

  • Cyclic pulse coding is a viable technique for improving hybrid Raman/FBG sensor performance.
  • The proposed integrated sensor scheme enables simultaneous, high-resolution measurements.
  • This advancement offers a robust solution for complex environmental and structural monitoring.