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

Bipolar Junction Transistor01:22

Bipolar Junction Transistor

Bipolar Junction Transistors (BJTs) are essential elements in electronic circuits, playing a crucial role in the functionality of amplifiers, memories, and microprocessors. These transistors can be designed as NPN or PNP based on their doping patterns. They consist of three layers: the emitter, base, and collector. The configuration of these layers and their respective doping levels—with N-type or P-type impurities—define the transistor's type and its operational characteristics.
The structure...
Special considerations while measuring pulse01:13

Special considerations while measuring pulse

Assessing a patient's pulse is a fundamental skill in healthcare, but certain situations require special attention:

You might also read

Related Articles

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

Sort by
Same author

Correction: A framework for spontaneous Brillouin noise: unveiling fundamental limits in Brillouin metrology.

Light, science & applications·2026
Same author

Towards lasing systems for distributed fibre sensing.

Light, science & applications·2026
Same author

Absolute thermometry based on Brillouin scattering in gases.

Light, science & applications·2026
Same author

A framework for spontaneous Brillouin noise: unveiling fundamental limits in Brillouin metrology.

Light, science & applications·2026
Same author

Frequency-comb enabled spectrum-correlation reflectometry for distributed fiber-optic sensing.

Light, science & applications·2025
Same author

Near-Field Acoustic Imaging Using Fiber-Optic Distributed Acoustic Sensing and Beamforming Techniques.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)·2025
Same journal

Denoising algorithm of Φ-OTDR systems based on adaptive fractional wavelet transform denoising.

Optics express·2026
Same journal

Millisecond photon-to-photon latency and high-speed volumetric projection system for optogenetics.

Optics express·2026
Same journal

Polarization-encoded coaxial structured light for high-precision 3D surface profilometry.

Optics express·2026
Same journal

Discrete freeform optical design based on collaborative optimization of point cloud and local normals.

Optics express·2026
Same journal

Ultrafast ghost imaging with 25 GHz speckle switching and wavelength-division multiplexing.

Optics express·2026
Same journal

Atomic vapor cells fabricated by femtosecond laser welding of standard-optical-quality glass.

Optics express·2026
See all related articles

Related Experiment Video

Updated: May 8, 2026

Advanced Cardiac Rhythm Management by Applying Optogenetic Multi-Site Photostimulation in Murine Hearts
08:43

Advanced Cardiac Rhythm Management by Applying Optogenetic Multi-Site Photostimulation in Murine Hearts

Published on: August 26, 2021

Bipolar optical pulse coding for performance enhancement in BOTDA sensors.

Marcelo A Soto1, Sébastien Le Floch, Luc Thévenaz

  • 1EPFL Swiss Federal Institute of Technology, Institute of Electrical Engineering, SCI-STI-LT, Station 11, CH-1015Lausanne, Switzerland. marcelo.soto@epfl.ch

Optics Express
|August 14, 2013
PubMed
Summary
This summary is machine-generated.

This study introduces a new pump signal for Brillouin optical time-domain analysis (BOTDA) sensors using bipolar pulse coding. The novel method enhances signal-to-noise ratio and robustness against pump depletion in BOTDA sensing.

More Related Videos

Optrode Array for Simultaneous Optogenetic Modulation and Electrical Neural Recording
06:36

Optrode Array for Simultaneous Optogenetic Modulation and Electrical Neural Recording

Published on: September 1, 2022

Related Experiment Videos

Last Updated: May 8, 2026

Advanced Cardiac Rhythm Management by Applying Optogenetic Multi-Site Photostimulation in Murine Hearts
08:43

Advanced Cardiac Rhythm Management by Applying Optogenetic Multi-Site Photostimulation in Murine Hearts

Published on: August 26, 2021

Optrode Array for Simultaneous Optogenetic Modulation and Electrical Neural Recording
06:36

Optrode Array for Simultaneous Optogenetic Modulation and Electrical Neural Recording

Published on: September 1, 2022

Area of Science:

  • Optoelectronics and Photonics
  • Fiber Optic Sensing Technology

Background:

  • Brillouin optical time-domain analysis (BOTDA) is a crucial technique for distributed fiber optic sensing.
  • Existing pulse coding methods in BOTDA face limitations in signal-to-noise ratio (SNR) and robustness to pump depletion.

Purpose of the Study:

  • To propose and validate a novel pump signal for BOTDA sensors utilizing bipolar pulse coding and single-sideband suppressed-carrier (SSB-SC) modulation.
  • To enhance the performance of BOTDA systems in terms of spatial resolution and signal quality.

Main Methods:

  • Development of a pump signal based on bipolar pulse coding and SSB-SC modulation.
  • Experimental validation using bipolar complementary-correlation Golay codes over a 100 km fiber.
  • Achieving 2 m spatial resolution and analyzing Brillouin gain and loss spectra sequentially.

Main Results:

  • The proposed technique successfully resolved a 2 m hot-spot at the end of the sensing fiber without algorithmic distortion.
  • Bipolar Golay codes demonstrated superior signal-to-noise ratio (SNR) enhancement compared to unipolar codes.
  • The method exhibited increased robustness against pump depletion, a common challenge in BOTDA sensing.

Conclusions:

  • Bipolar pulse coding offers significant advantages for BOTDA sensor performance.
  • The novel pump signal design improves SNR and robustness, enabling high-resolution sensing.
  • This advancement contributes to more effective and reliable distributed fiber optic sensing applications.