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

Time and frequency -Domain Interpretation of Phase-lag Control01:21

Time and frequency -Domain Interpretation of Phase-lag Control

441
Phase-lag controllers are widely used in control systems to improve stability and reduce steady-state errors. A dimmer switch controlling the brightness of a light bulb serves as a practical example of phase-lag control, gradually adjusting the bulb's brightness. Mathematically, phase-lag control or low-pass filtering is represented when the factor 'a' is less than 1.
Phase-lag controllers do not place a pole at zero, but instead influence the steady-state error by amplifying any...
441
Time and frequency -Domain Interpretation of Phase-lead Control01:24

Time and frequency -Domain Interpretation of Phase-lead Control

501
Phase-lead controllers are commonly used in various control systems to enhance response speed and stability. Adjusting the brightness on a television screen offers a practical example of phase-lead control. When contrast is enhanced, a phase-lead controller is employed. Mathematically, phase-lead control is identified when the first parameter is smaller than the second.
The design of phase-lead control involves the strategic placement of poles and zeros to balance steady-state error and system...
501
Propagation Speed of Electromagnetic Waves01:30

Propagation Speed of Electromagnetic Waves

4.9K
Electromagnetic waves are consistent with Ampere's law. Assuming there is no conduction current Ampere's law is given as:
4.9K
2D NMR: Overview of Homonuclear Correlation Techniques01:16

2D NMR: Overview of Homonuclear Correlation Techniques

795
Homonuclear correlation spectroscopy (COSY) is a powerful technique used in Nuclear Magnetic Resonance (NMR) spectroscopy to study the correlations between nuclei of the same type within a molecule. It provides information about scalar couplings between adjacent nuclei, which helps determine connectivity and structural information. There are several COSY variants, each with its unique strengths and experimental parameters.
COSY90 is the standard two-dimensional (2D) COSY experiment that...
795
Drug Concentration Versus Time Correlation01:15

Drug Concentration Versus Time Correlation

2.7K
The plasma drug concentration-time curve is a crucial tool in pharmacokinetics, representing the drug's concentration in plasma at different time intervals post-administration. This curve illustrates the drug's journey from absorption into the systemic circulation, distribution to body tissues, and eventual elimination through excretion or biotransformation.
Two pivotal parameters are the minimum effective concentration (MEC) and the minimum toxic concentration (MTC). The MEC is the...
2.7K

You might also read

Related Articles

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

Sort by
Same author

Pathological mechanisms of osteoarthritis in the network of geriatric comorbidities: Emerging insights from organs-crosstalk.

Journal of orthopaedic translation·2026
Same author

BMSC-targeting aptamer conjugation enhances bone delivery of a rice bran peptide to mitigate osteoporosis via eIF3L.

Materials today. Bio·2026
Same author

Amuc_1473 Links Gut Microbes to Skeletal Homeostasis and Counteracts Multifactorial Osteoporosis.

Advanced science (Weinheim, Baden-Wurttemberg, Germany)·2026
Same author

Epigenetic brain reprogramming rejuvenates neuro-immune circuits to reverse Alzheimer's disease pathology and systemic bone loss.

Journal of neuroinflammation·2026
Same author

Adjunctive PC6 magnetic stimulation with rTMS over left DLPFC for post-stroke cognitive impairment: a protocol for fNIRS-fMRI randomized controlled trial.

Frontiers in neurology·2026
Same author

Clinical Use of CTA-Guided Emergency Microsurgical Resection of Ruptured Cerebral Arteriovenous Malformations in Pediatric Patients.

World neurosurgery·2026
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: Mar 25, 2026

Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing
15:58

Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing

Published on: December 3, 2013

6.2K

Measuring the second order correlation function and the coherence time using random phase modulation.

Chen-How Huang, Yung-Hsiang Wen, Yi-Wei Liu

    Optics Express
    |February 25, 2016
    PubMed
    Summary
    This summary is machine-generated.

    Researchers developed a new method to measure the second-order correlation function g(2) and coherence time. This approach improves accuracy for photon wave packet overlap, offering a simpler way to analyze weak light sources.

    More Related Videos

    A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
    07:56

    A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

    Published on: September 5, 2019

    9.1K
    Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
    12:19

    Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

    Published on: April 4, 2017

    8.9K

    Related Experiment Videos

    Last Updated: Mar 25, 2026

    Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing
    15:58

    Measurement of Coherence Decay in GaMnAs Using Femtosecond Four-wave Mixing

    Published on: December 3, 2013

    6.2K
    A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference
    07:56

    A Photonic System for Generating Unconditional Polarization-Entangled Photons Based on Multiple Quantum Interference

    Published on: September 5, 2019

    9.1K
    Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source
    12:19

    Measurement of Quantum Interference in a Silicon Ring Resonator Photon Source

    Published on: April 4, 2017

    8.9K

    Area of Science:

    • Photonics and Quantum Optics
    • Optical Interferometry

    Background:

    • Accurate measurement of the second-order correlation function g(2) is crucial for characterizing light sources.
    • Existing methods for determining coherence time can be complex, especially for weak light sources.

    Purpose of the Study:

    • To investigate a novel approach for measuring g(2) and coherence time.
    • To enhance the accuracy of g(2) measurements by incorporating high-order corrections.
    • To demonstrate a simplified technique for measuring coherence time in weak light sources.

    Main Methods:

    • g(2) calculated via direct numerical self-convolution of photon pair time interval distribution with high-order correction.
    • Accuracy validated using a Hanbury-Brown-Twiss interferometer with pseudo-thermal light.
    • Coherence time measured using a novel random phase modulation technique.

    Main Results:

    • The significance of high-order correction in g(2) measurement is directly related to the photon wave packet overlap factor (Īτc).
    • The novel random phase modulation technique provides an accurate measurement of coherence time (τc).
    • The demonstrated method is particularly effective for weak light sources with long coherence times.

    Conclusions:

    • The new method offers improved accuracy for g(2) measurements, especially considering photon wave packet overlap.
    • Random phase modulation presents a simplified and effective experimental setup for measuring coherence time.
    • These advancements provide valuable tools for optical metrology and characterization of light sources.