Search research articles

ABOUT JoVE

Overview Leadership Blog JoVE Help Center

AUTHORS

Publishing Process Editorial Board Scope & Policies Peer Review FAQ Submit

LIBRARIANS

Testimonials Subscriptions Access Resources Library Advisory Board FAQ

RESEARCH

JoVE Journal Methods Collections JoVE Encyclopedia of Experiments Archive

EDUCATION

JoVE Core JoVE Business JoVE Science Education JoVE Lab Manual Faculty Resource Center Faculty Site

Terms & Conditions of Use

Related Concept Videos

Phase-lead and Phase-lag Controllers

Phase-lead and Phase-lag Controllers

Understanding the working function of different types of controllers can be illustrated with practical analogies, such as adjusting a stereo's volume equalizer. Cranking up the bass involves a phase-lead controller, which functions as a high-pass filter, while increasing the treble uses a phase-lag controller, which acts as a low-pass filter. PD controllers, similar to high-pass filters, enhance the system's response to high-frequency components. PI controllers, akin to low-pass...

Time and frequency -Domain Interpretation of Phase-lag Control

Time and frequency -Domain Interpretation of Phase-lag Control

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...

You might also read

Related Articles

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

Sort by

Same author

Ultralong, spin-photon fibres enable polarization-enhanced wearable sensing.

Nature communications·2026

Same author

Influence of nonlinear node operating states on the performance of photonic reservoir computing.

Optics express·2026

Same author

Forward Raman scattering spectral properties.

Optics express·2026

Same author

A Nanochiral Biosensor Enables Clinical Anesthesia Monitoring.

Advanced materials (Deerfield Beach, Fla.)·2026

Same author

45 km ROTDR with 0.5 m/0.11 °C via complex-domain square-wave width-chirp pulse compression.

Light, science & applications·2026

Same author

Processable, High-Performance Circularly Polarized Luminescence Architectures for Information Interaction.

Accounts of chemical research·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

Search research articles

Related Experiment Video

Updated: May 5, 2026

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

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

Published on: January 28, 2019

Phase chaos laser generation utilizing controlled optical injection and nonlinear phase locking.

Lintao Niu, Yahui Wang, Lijun Qiao

|May 4, 2026

Summary

This summary is machine-generated.

This study presents a novel method for generating an intensity-stabilized phase chaos laser (PCL) by optically injecting a chaotic master laser into a slave laser. This technique significantly reduces amplitude fluctuations, enhancing phase-correlation applications.

More Related Videos

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Direct Imaging of Laser-driven Ultrafast Molecular Rotation

Direct Imaging of Laser-driven Ultrafast Molecular Rotation

Published on: February 4, 2017

Related Experiment Videos

Last Updated: May 5, 2026

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

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

Published on: January 28, 2019

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

Direct Imaging of Laser-driven Ultrafast Molecular Rotation

Direct Imaging of Laser-driven Ultrafast Molecular Rotation

Published on: February 4, 2017

Area of Science:

Optics and Photonics
Laser Physics
Nonlinear Dynamics

Background:

Traditional chaotic lasers suffer from large amplitude fluctuations, limiting their use in phase interferometry.
Phase interferometry requires stable laser sources for high-precision measurements.

Purpose of the Study:

To propose and demonstrate a robust method for generating an intensity-stabilized phase chaos laser (PCL).
To overcome the amplitude fluctuation limitations of conventional chaotic lasers for phase-correlation applications.

Main Methods:

Controlled optical injection of a chaotic master laser into a slave distributed feedback laser.
Utilizing gain saturation via a 6x threshold driving current for amplitude stabilization.
Optimizing injection strength (2.4%-3.2%) and frequency detuning (-0.63 GHz to 3.75 GHz) for nonlinear phase locking.

Main Results:

Achieved a 5.4-fold reduction in peak-to-peak amplitude fluctuations.
Generated a broadband optical spectrum with an 8.7 GHz linewidth.
Determined a correlation dimension of 4.86, indicating complex chaotic dynamics.

Conclusions:

The developed method provides a comprehensive framework for mastering PCL.
This intensity-stabilized PCL opens avenues for high-precision phase-correlation applications.