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

Doppler Effect - II01:05

Doppler Effect - II

5.0K
The Doppler effect has several practical, real-world applications. For instance, meteorologists use Doppler radars to interpret weather events based on the Doppler effect. Typically, a transmitter emits radio waves at a specific frequency toward the sky from a weather station. The radio waves bounce off the clouds and precipitation and travel back to the weather station. The radio frequency of the waves reflected back to the station appears to decrease if the clouds or precipitation are moving...
5.0K
¹H NMR: Interpreting Distorted and Overlapping Signals01:02

¹H NMR: Interpreting Distorted and Overlapping Signals

1.7K
Spin systems where the difference in chemical shifts of the coupled nuclei is greater than ten times J are called first-order spin systems. These nuclei are weakly coupled, and their chemical shifts and coupling constant can generally be estimated from the well-separated signals in the spectrum.
As Δν decreases and the signals move closer, the doublets appear increasingly distorted. The intensities of the inner lines increase at the cost of those of the outer lines as the signals are...
1.7K
NMR Spectrometers: Resolution and Error Correction01:14

NMR Spectrometers: Resolution and Error Correction

1.1K
When magnetic nuclei in a sample achieve resonance and undergo relaxation, the signal detected in NMR is an approximately exponential free induction decay. Fourier transform of an exponential decay yields a Lorentzian peak in the frequency domain. Lorentzian peaks in an NMR spectrum are defined by their amplitude, full width at half maximum, and position, where the peak width is governed by the spin-spin relaxation time alone. In real experiments, however, the applied magnetic field is rendered...
1.1K
Errors in Global Positioning System01:26

Errors in Global Positioning System

378
Global Positioning System (GPS) technology has revolutionized navigation and positioning, but its accuracy is often compromised by various errors. These errors, stemming from environmental, satellite, and receiver-related factors, require careful mitigation to ensure reliable performance across applications.Atmospheric ErrorsGPS signals travel through the Earth’s ionosphere and troposphere, introducing delays which affect accuracy. The ionosphere is strongly influenced by charged particles,...
378
Doppler Effect - I00:56

Doppler Effect - I

6.7K
The Doppler effect and Doppler shift were named after the Austrian physicist and mathematician Christian Johann Doppler in 1842, who conducted experiments with both moving sources and moving observers. Consider an observer standing on a street corner, observing an ambulance with a siren sound passing by at a constant speed. The observer experiences two characteristic changes in the sound of the siren. Initially, the sound increases in loudness as the ambulance approaches and decreases in...
6.7K
Nonlinear Pharmacokinetics: Causes of Nonlinearity01:22

Nonlinear Pharmacokinetics: Causes of Nonlinearity

821
Nonlinearity in drug pharmacokinetics is caused by various factors influencing how a drug is absorbed, distributed, metabolized, and excreted. Understanding these nonlinear processes is crucial for predicting drug behavior in the body and optimizing drug dosing regimens.
Nonlinear drug absorption can occur when the process is rate-limited by solubility, carrier-mediated transport systems, or saturation of the presystemic gut wall or hepatic metabolism. For instance, high doses of riboflavin...
821

You might also read

Related Articles

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

Sort by
Same author

Tristetraprolin protects against osteoarthritis by restraining chondrocyte mitochondrial DNA release through post-transcriptional regulation.

Journal of orthopaedic translation·2026
Same author

Effect of Internal Defects on the Compression Behavior of Helical Layered Square Honeycombs Fabricated by Selective Laser Melting.

Materials (Basel, Switzerland)·2026
Same author

TREM2 Regulates Microglial Activation via the ERK/p38 Signaling Pathway: Implications for the Pathogenesis of Experimental Autoimmune Uveitis.

Investigative ophthalmology & visual science·2026
Same author

Sortase-Mediated Dual-Display Phage Bioluminescent Immunoassay for Detection of <i>Vibrio parahemolyticus</i> Using Affinity-Enhanced Nanobody.

Analytical chemistry·2026
Same author

How organs react under fasting or glucose-insulin status: a self-controlled study using <sup>18</sup>F-FDG total-body PET/CT.

European journal of nuclear medicine and molecular imaging·2026
Same author

Molecular-level interaction of dopamine with lipids studied by sum frequency generation spectroscopy.

Biophysical journal·2026

Related Experiment Video

Updated: Mar 7, 2026

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
12:14

The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

Published on: August 12, 2013

22.6K

Nonlinearity error in homodyne interferometer caused by multi-order Doppler frequency shift ghost reflections.

Pengcheng Hu, Yue Wang, Haijin Fu

    Optics Express
    |March 1, 2017
    PubMed
    Summary
    This summary is machine-generated.

    A novel cyclic error in homodyne interferometers, caused by ghost reflections, has been identified. Using a corner cube retroreflector significantly reduces this error, paving the way for more accurate interferometry.

    More Related Videos

    Implementation of a Reference Interferometer for Nanodetection
    16:11

    Implementation of a Reference Interferometer for Nanodetection

    Published on: April 26, 2014

    9.9K
    Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle
    15:06

    Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle

    Published on: January 3, 2016

    13.5K

    Related Experiment Videos

    Last Updated: Mar 7, 2026

    The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry
    12:14

    The Generation of Higher-order Laguerre-Gauss Optical Beams for High-precision Interferometry

    Published on: August 12, 2013

    22.6K
    Implementation of a Reference Interferometer for Nanodetection
    16:11

    Implementation of a Reference Interferometer for Nanodetection

    Published on: April 26, 2014

    9.9K
    Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle
    15:06

    Measurement of Scattering Nonlinearities from a Single Plasmonic Nanoparticle

    Published on: January 3, 2016

    13.5K

    Area of Science:

    • Optical metrology
    • Interferometry

    Background:

    • Homodyne interferometers are susceptible to cyclic errors that limit measurement accuracy.
    • Conventional cyclic errors in interferometers have well-understood origins.
    • A previously undiscovered cyclic error in homodyne interferometers is reported.

    Purpose of the Study:

    • To identify and characterize a novel cyclic error in homodyne interferometers.
    • To develop a theoretical model explaining the origin of this new cyclic error.
    • To propose and validate a method for mitigating this error.

    Main Methods:

    • Development of a theoretical model incorporating ghost reflections and interference principles.
    • Analysis of multi-order Doppler frequency shift ghost beams.
    • Comparison of the new cyclic error with conventional errors using Lissajous curves.
    • Experimental validation using a corner cube retroreflector.

    Main Results:

    • A new cyclic error, distinct from conventional errors, was discovered in homodyne interferometers.
    • The error originates from multi-order Doppler frequency shift ghost beams participating in interference.
    • Replacing a mirror with a corner cube retroreflector significantly reduced the cyclic error.
    • The proposed model successfully explains the observed cyclic error.

    Conclusions:

    • The identified cyclic error is a significant factor affecting homodyne interferometer accuracy.
    • The ghost reflection model provides a valid explanation for the new cyclic error.
    • The use of corner cube retroreflectors offers a practical solution for error reduction.
    • This research contributes to the development of highly accurate homodyne interferometers.