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

Reconstruction of Signal using Interpolation01:10

Reconstruction of Signal using Interpolation

337
Signal processing techniques are essential for accurately converting continuous signals to digital formats and vice versa. When a continuous signal is sampled with a period T, the resulting sampled signal exhibits replicas of the original spectrum in the frequency domain, spaced at intervals equal to the sampling frequency. To handle this sampled signal, a zero-order hold method can be applied, which creates a piecewise constant signal by retaining each sample's value until the next...
337
Phase Contrast and Differential Interference Contrast Microscopy01:26

Phase Contrast and Differential Interference Contrast Microscopy

9.5K
Phase-Contrast Microscopes
In-phase-contrast microscopes, interference between light directly passing through a cell and light refracted by cellular components is used to create high-contrast, high-resolution images without staining. It is the oldest and simplest type of microscope that creates an image by altering the wavelengths of light rays passing through the specimen. Altered wavelength paths are created using an annular stop in the condenser. The annular stop produces a hollow cone of...
9.5K
Time and frequency -Domain Interpretation of Phase-lag Control01:21

Time and frequency -Domain Interpretation of Phase-lag Control

148
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...
148
Gain01:15

Gain

239
Gain and phase shift are properties of linear circuits that describe the effect a circuit has on a sinusoidal input voltage or current. The circuit's behavior that contains reactive elements will depend on the frequency of the input sinusoid. As a result, it is observed that the gain and phase shift will all be frequency functions.
Gain:
Suppose Vin is the input and Vout is the output signal to a circuit.
239

You might also read

Related Articles

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

Sort by
Same author

Life's Essential 8 and Risk of All-Cause and Cardiovascular Mortality in US Adults With Arthritis: A Retrospective Cohort Study Utilizing NHANES Database.

International journal of rheumatic diseases·2025
Same author

Model reference adaptive tracking control for hydraulic servo systems with nonlinear neural-networks.

ISA transactions·2019
Same author

Deguelin, a selective silencer of the NPM1 mutant, potentiates apoptosis and induces differentiation in AML cells carrying the NPM1 mutation.

Annals of hematology·2014
Same author

Design of a 6-DOF upper limb rehabilitation exoskeleton with parallel actuated joints.

Bio-medical materials and engineering·2014
Same author

SIFT algorithm-based 3D pose estimation of femur.

Bio-medical materials and engineering·2014
Same author

Estrogen receptors' neuroprotective effect against glutamate-induced neurotoxicity.

Neurological sciences : official journal of the Italian Neurological Society and of the Italian Society of Clinical Neurophysiology·2014
Same journal

Long-term stabilization of intensity-difference squeezing from four-wave mixing in rubidium vapor.

Optics express·2026
Same journal

Robust 3D topography measurement of large-range high-aspect-ratio structures based on dual-domain statistical filtering in SD-OCT.

Optics express·2026
Same journal

Broadband transmissive terahertz metasurface for simultaneous quad-mode OAM multiplexing.

Optics express·2026
Same journal

Leveraging two-dimensional materials for high-sensitivity optical sensors: quasi-bound states in the continuum within hybrid metasurfaces.

Optics express·2026
Same journal

Resolution investigation for dual-spherical-wave optical scanning holographic microscopy: methods and performance.

Optics express·2026
Same journal

Robustness of parallel subnetwork-filtered diffractive deep neural networks.

Optics express·2026
See all related articles

Related Experiment Video

Updated: Sep 11, 2025

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
08:39

Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

Published on: January 28, 2019

9.9K

Efficient phase-sensitive compensation in lossy interferometry using optical amplification.

Tingting Jiang, Jie Zhao, Feiyu Yao

    Optics Express
    |August 13, 2025
    PubMed
    Summary
    This summary is machine-generated.

    Optical interferometers can now achieve higher sensitivity despite signal loss. Pre-amplification (PRA) using a Raman amplifier before signal loss significantly boosts phase estimation sensitivity, outperforming post-amplification.

    More Related Videos

    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

    21.9K
    Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
    09:43

    Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

    Published on: March 20, 2017

    10.0K

    Related Experiment Videos

    Last Updated: Sep 11, 2025

    Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator
    08:39

    Shaping the Amplitude and Phase of Laser Beams by Using a Phase-only Spatial Light Modulator

    Published on: January 28, 2019

    9.9K
    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

    21.9K
    Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping
    09:43

    Transmission of Multiple Signals through an Optical Fiber Using Wavefront Shaping

    Published on: March 20, 2017

    10.0K

    Area of Science:

    • Quantum Optics
    • Precision Measurement

    Background:

    • Optical interferometers are crucial for precision measurements but suffer from sensitivity reduction due to optical path losses.
    • These losses introduce vacuum noise, degrading phase estimation accuracy.

    Purpose of the Study:

    • To propose and validate an enhanced interferometer scheme using a Raman amplifier to mitigate sensitivity loss.
    • To investigate the impact of amplifier positioning (pre-amplification vs. post-amplification) on sensitivity.

    Main Methods:

    • Integration of a Raman amplifier within the lossy interference arm of an optical interferometer.
    • Comparative analysis of pre-amplification (PRA) and post-amplification (POA) strategies.
    • Experimental validation of the proposed scheme under varying loss conditions.

    Main Results:

    • Pre-amplification (PRA) significantly outperforms post-amplification (POA) in enhancing phase sensitivity.
    • PRA effectively increases phase-sensitive particles and minimizes noise amplification, especially at high loss levels.
    • Experimental demonstration showed a 4.6 dB sensitivity improvement at 90% loss with PRA, equivalent to an 8x increase in laser power.

    Conclusions:

    • The proposed PRA-enhanced interferometry scheme offers a simple yet effective method to improve robustness against significant optical losses.
    • This technique facilitates practical phase measurement in lossy environments, enhancing the applicability of optical interferometers.