Jove
Visualize
Contact Us

Related Concept Videos

Transmission-Line Differential Equations01:26

Transmission-Line Differential Equations

Transmission lines are essential components of electrical power systems. They are characterized by the distributed nature of resistance (R), inductance (L), and capacitance (C) per unit length. To analyze these lines, differential equations are employed to model the variations in voltage and current along the line.
Line Section Model
A circuit representing a line section of length Δx helps in understanding the transmission line parameters. The voltage V(x) and current i(x) are measured from the...
¹H NMR: Long-Range Coupling01:27

¹H NMR: Long-Range Coupling

The coupling interactions of nuclei across four or more bonds are usually weak, with J values less than 1 Hz. While these are usually not observed in spectra, the presence of multiple bonds along the coupling pathway can result in observable long-range coupling.
In alkenes, spin information is communicated via σ–π overlap, as seen in allylic (four-bond) and homoallylic (five-bond) couplings. These coupling interactions are stronger when the σ bond is parallel to the alkene π orbitals.
Characteristics of Practical Op Amps01:16

Characteristics of Practical Op Amps

A difference amplifier, a crucial component in numerous electronic devices, ideally amplifies only the difference-mode signal, which is the difference between two input signals. However, in practical circuits, the output voltage depends on both the differential gain and the common-mode gain.
The ratio of differential gain to the common-mode gain is defined as the common-mode rejection ratio (CMRR). This ratio quantifies the ability of operational amplifiers (op-amps) to reject common-mode...
Interference: Path Lengths01:10

Interference: Path Lengths

Consider two sources of sound, that may or may not be in phase, emitting waves at a single frequency, and consider the frequencies to be the same.
Two special sources may be considered when they are in phase. This can be easily achieved by feeding the two sources from the same source. An example would be synchronizing the two speakers by feeding them with the same source, such as the sound waves produced by a tuning fork. This setup ensures that the two sources have the same frequency and are...
Differential Form of Maxwell's Equations01:17

Differential Form of Maxwell's Equations

James Clerk Maxwell (1831–1879) was one of the significant contributors to physics in the nineteenth century. He is probably best known for having combined existing knowledge of the laws of electricity and the laws of magnetism with his insights to form a complete overarching electromagnetic theory, represented by Maxwell's equations. The four basic laws of electricity and magnetism were discovered experimentally through the work of physicists such as Oersted, Coulomb, Gauss, and Faraday.
Propagation Speed of Electromagnetic Waves01:30

Propagation Speed of Electromagnetic Waves

Electromagnetic waves are consistent with Ampere's law. Assuming there is no conduction current Ampere's law is given as:

You might also read

Related Articles

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

Sort by
Same author

Analysis of Y-junction and coupled laser arrays.

Applied optics·2010
Same author

Optical coherence calculations with the split-step fast Fourier transform method.

Applied optics·2010
Same author

Improved analysis of the propagating beam method in longitudinally perturbed optical waveguides.

Applied optics·2010
Same author

Calculated pulse responses of perturbed fiber profiles.

Applied optics·2010
Same author

Numerical investigation of mode coupling in sinusoidally modulated GRIN planar waveguides.

Applied optics·2010
Same author

Beam propagation method in anisotropic media.

Applied optics·2010
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 Experiment Video

Updated: Jul 8, 2026

Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
14:18

Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements

Published on: February 28, 2016

Influence of mode coupling on differential mode delay.

B Stoltz1, D Yevick

  • 1Institute of Optical Research, Royal Institute of Technology, S-100 44 Stockholm, Sweden.

Applied Optics
|August 1, 1983
PubMed
Summary
This summary is machine-generated.

Differential mode delay (DMD) pulse response is affected by mode coupling. Numerical analysis shows fiber profile variations can be accurately estimated from DMD results despite mode coupling.

More Related Videos

Characterization of Anisotropic Leaky Mode Modulators for Holovideo
09:36

Characterization of Anisotropic Leaky Mode Modulators for Holovideo

Published on: March 19, 2016

Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
07:39

Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons

Published on: July 21, 2018

Related Experiment Videos

Last Updated: Jul 8, 2026

Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements
14:18

Automation of Mode Locking in a Nonlinear Polarization Rotation Fiber Laser through Output Polarization Measurements

Published on: February 28, 2016

Characterization of Anisotropic Leaky Mode Modulators for Holovideo
09:36

Characterization of Anisotropic Leaky Mode Modulators for Holovideo

Published on: March 19, 2016

Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons
07:39

Determination of the Excitation and Coupling Rates Between Light Emitters and Surface Plasmon Polaritons

Published on: July 21, 2018

Area of Science:

  • Optical Fiber Communications
  • Photonics
  • Wave Propagation

Background:

  • Differential mode delay (DMD) is crucial for high-speed optical fiber communication.
  • Mode coupling, induced by fiber ellipticity and microbending, can distort DMD pulse responses.
  • Understanding these effects is vital for accurate fiber characterization.

Purpose of the Study:

  • To numerically analyze the impact of ellipticity- and microbending-induced mode coupling on DMD pulse response.
  • To investigate the recoverability of fiber profile information from DMD measurements under mode coupling conditions.
  • To assess the performance of DMD analysis for different fiber profiles, including those with central index dips and sinusoidal ripples.

Main Methods:

  • Numerical simulation of optical fiber propagation.
  • Modeling of ellipticity- and microbending-induced mode coupling.
  • Analysis of differential mode delay (DMD) pulse response characteristics.
  • Examination of fiber profiles with central index dips and sinusoidal ripples.

Main Results:

  • Ellipticity and microbending significantly affect the DMD pulse response.
  • Substantial mode coupling does not prevent accurate estimation of slowly varying fiber profile components.
  • The presence of a central index dip and sinusoidal ripples were considered in the analysis.

Conclusions:

  • DMD analysis remains a viable tool for characterizing optical fibers even with significant mode coupling.
  • Slowly varying fiber profile features can be reliably extracted from DMD data.
  • This work validates DMD as a robust method for fiber diagnostics in realistic scenarios.