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

84
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...
84
Time and frequency -Domain Interpretation of Phase-lead Control01:24

Time and frequency -Domain Interpretation of Phase-lead Control

76
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...
76

You might also read

Related Articles

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

Sort by
Same author

RAPSN/rapsyn aggregation-induced HSPA/HSP70-BAG3 aggrephagy maintains CHRN integrity in myasthenia gravis.

Autophagy·2026
Same author

C-band high-power (519 mW CW/ 750 mW quasi-CW), low-noise distributed feedback semiconductor laser diode.

Optics express·2026
Same author

Nodular Meningeal Recurrence After Laser Interstitial Thermal Therapy for Brain Metastasis: Diagnostic Challenges and Role of Reirradiation With Preoperative Fractionated Stereotactic Radiation Therapy.

Advances in radiation oncology·2026
Same author

Dual-wavelength DFB lasers based on continuous-phase-shift gratings for MMW/THz photomixing.

Optics letters·2026
Same author

Clinical Outcomes and Patterns of Neurological Toxicity After Stereotactic Body Radiotherapy Reirradiation (reSBRT) of Spine Metastases Previously Treated with SBRT.

Cancers·2026
Same author

miR-495-3p promotes chronic obstructive pulmonary disease by activating ferroptosis in lung epithelial cells through regulation of the ETS1/GPX4 axis.

Molecular biology reports·2026
Same journal

Gaussian-modulated continuous-variable quantum key distribution over 60 km fiber using an integrated silicon photonic receiver.

Optics letters·2026
Same journal

E2E-OCT: end-to-end joint learning model using optical coherence tomography images for vocal cord leukoplakia diagnosis.

Optics letters·2026
Same journal

Holographic generation of panoramic 3D scenes by concave ellipsoidal mirror reflection.

Optics letters·2026
Same journal

Dual-pilot phase recovery with pair-wise maximum-ratio combining for coherent PONs.

Optics letters·2026
Same journal

Mapping the whispering gallery modes of a CaF<sub>2</sub> disk resonator with half-tapered fibers to estimate the fundamental mode volume.

Optics letters·2026
Same journal

Quantitative estimation of deep-subwavelength scale via dark-field scattering axial energy concentration decay profiles.

Optics letters·2026
See all related articles

Related Experiment Video

Updated: Jun 2, 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

9.7K

Narrow linewidth distributed feedback lasers utilizing distributed phase shift.

Yiming Sun, Bocheng Yuan, Xiao Sun

    Optics Letters
    |January 16, 2025
    PubMed
    Summary
    This summary is machine-generated.

    This study introduces distributed phase shift (DPS) lasers for improved performance. Optimized DPS distributed feedback (DFB) lasers demonstrate enhanced stability, efficiency, and a narrower optical linewidth.

    More Related Videos

    Construction and Characterization of External Cavity Diode Lasers for Atomic Physics
    09:10

    Construction and Characterization of External Cavity Diode Lasers for Atomic Physics

    Published on: April 24, 2014

    27.6K
    Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator
    07:42

    Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator

    Published on: December 15, 2021

    3.0K

    Related Experiment Videos

    Last Updated: Jun 2, 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

    9.7K
    Construction and Characterization of External Cavity Diode Lasers for Atomic Physics
    09:10

    Construction and Characterization of External Cavity Diode Lasers for Atomic Physics

    Published on: April 24, 2014

    27.6K
    Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator
    07:42

    Rapid Repetition Rate Fluctuation Measurement of Soliton Crystals in a Microresonator

    Published on: December 15, 2021

    3.0K

    Area of Science:

    • Photonics
    • Semiconductor Lasers
    • Optical Engineering

    Background:

    • Distributed feedback (DFB) lasers are crucial for optical communication.
    • Achieving stable single longitudinal mode operation and high performance remains a challenge.

    Purpose of the Study:

    • To propose and experimentally demonstrate a novel DFB laser design incorporating a distributed phase shift (DPS) region.
    • To optimize the DPS region length and phase shift for enhanced laser characteristics.

    Main Methods:

    • Cavity field intensity distribution and output spectrum modeling were employed for optimization.
    • Experimental comparisons were conducted between optimized DPS-DFB lasers and traditional π-phase shift DFB lasers.

    Main Results:

    • Optimized DPS-DFB lasers exhibit stable single longitudinal mode operation over an extended current range.
    • These lasers show a lower threshold current, higher power slope efficiency, and improved side mode suppression ratio (SMSR).
    • A significant reduction in minimum optical linewidth was achieved, from 1.3 MHz to 220 kHz.

    Conclusions:

    • The proposed DPS-DFB laser design offers superior performance compared to conventional DFB lasers.
    • Optimized DPS regions enable enhanced laser stability, efficiency, and spectral purity.
    • This advancement holds potential for next-generation optical communication systems.