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-lead Control01:24

Time and frequency -Domain Interpretation of Phase-lead Control

108
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...
108
Upsampling01:22

Upsampling

266
Managing signal sampling rates is essential in digital signal processing to maintain signal integrity. A decimated signal, characterized by a reduced frequency range due to its lower sampling rate, can be upsampled by inserting zeros between each sample. This upsampling process expands the original spectrum and introduces repeated spectral replicas at intervals dictated by the new Nyquist frequency. To refine this zero-inserted sequence, it is passed through a lowpass filter with a cutoff...
266
¹H NMR: Interpreting Distorted and Overlapping Signals01:02

¹H NMR: Interpreting Distorted and Overlapping Signals

1.1K
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...
1.1K
Frequency-Domain Interpretation of PD Control01:24

Frequency-Domain Interpretation of PD Control

147
Proportional-Derivative (PD) controllers are widely used in fan control systems to improve stability and performance. A fan control system can be effectively represented using a Bode plot to illustrate the impact of a PD controller through its transfer function. The Bode plot visually conveys how PD control modifies the fan's response across various frequencies, providing a frequency domain interpretation of the controller's behavior.
The proportional control gain, combined with the...
147
Bandpass Sampling01:17

Bandpass Sampling

211
In signal processing, bandpass sampling is an effective technique for sampling signals that have most of their energy concentrated within a narrow frequency band. This type of signal is known as a bandpass signal. The key principle of bandpass sampling involves sampling the signal at a rate that is greater than twice the signal's bandwidth to prevent aliasing.
A bandpass signal has a spectrum with a lower frequency limit, denoted as ω1, and an upper frequency limit, denoted as ω2....
211
Phase-lead and Phase-lag Controllers01:22

Phase-lead and Phase-lag Controllers

201
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...
201

You might also read

Related Articles

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

Sort by
Same author

Tradeoff between the Brillouin and transverse mode instabilities in Yb-doped fiber amplifiers.

Optics express·2022
Same author

Accurate and efficient modeling of the transverse mode instability in high energy laser amplifiers.

Optics express·2021
Same author

Formation of optical supramolecular structures in a fibre laser by tailoring long-range soliton interactions.

Nature communications·2019
Same author

Single-shot reconstruction of spectral amplitude and phase in a fiber ring cavity at a 80  MHz repetition rate.

Optics letters·2016
Same author

Optimized moth-eye anti-reflective structures for As<sub>2</sub>S<sub>3</sub> chalcogenide optical fibers.

Optics express·2016
Same author

Calculation of the expected output spectrum for a mid-infrared supercontinuum source based on As ₂ S₃ chalcogenide photonic crystal fibers.

Optics express·2014
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: Jul 25, 2025

Quasi-light Storage for Optical Data Packets
07:45

Quasi-light Storage for Optical Data Packets

Published on: February 6, 2014

10.9K

SBS suppression using PRBS phase modulation with different orders.

J T Young, C R Menyuk, J Hu

    Optics Express
    |June 29, 2023
    PubMed
    Summary
    This summary is machine-generated.

    Pseudo-random bitstream (PRBS) phase modulation effectively suppresses Brillouin instability (BI) in high-energy laser amplifiers. Higher PRBS orders increase the BI threshold, but improvements plateau as tone spacing nears the Brillouin linewidth.

    More Related Videos

    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
    High-speed Continuous-wave Stimulated Brillouin Scattering Spectrometer for Material Analysis
    07:55

    High-speed Continuous-wave Stimulated Brillouin Scattering Spectrometer for Material Analysis

    Published on: September 22, 2017

    10.2K

    Related Experiment Videos

    Last Updated: Jul 25, 2025

    Quasi-light Storage for Optical Data Packets
    07:45

    Quasi-light Storage for Optical Data Packets

    Published on: February 6, 2014

    10.9K
    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
    High-speed Continuous-wave Stimulated Brillouin Scattering Spectrometer for Material Analysis
    07:55

    High-speed Continuous-wave Stimulated Brillouin Scattering Spectrometer for Material Analysis

    Published on: September 22, 2017

    10.2K

    Area of Science:

    • Laser Physics
    • Nonlinear Optics
    • High-Power Lasers

    Background:

    • Brillouin instability (BI), driven by stimulated Brillouin scattering (SBS), limits output power in high-energy laser amplifiers.
    • Pseudo-random bitstream (PRBS) phase modulation is a key technique for mitigating BI.
    • Understanding the interplay between PRBS parameters and BI is crucial for optimizing laser performance.

    Purpose of the Study:

    • To investigate the influence of PRBS order and modulation frequency on the BI threshold.
    • To analyze the effect of varying Brillouin linewidths on BI suppression.
    • To establish predictive relationships for BI threshold based on PRBS modulation.

    Main Methods:

    • Simulations and theoretical analysis of PRBS phase modulation effects on BI.
    • Examination of BI threshold variations across different PRBS orders and Brillouin linewidths.
    • Derivation of an equation to predict BI threshold for arbitrary PRBS orders.

    Main Results:

    • Increasing PRBS order enhances the BI threshold by distributing power across more frequency tones.
    • BI threshold improvement saturates when PRBS tone spacing approaches the Brillouin linewidth.
    • Optimal PRBS order is inversely related to Brillouin linewidth, with no significant dependence on averaging time or fiber length.

    Conclusions:

    • PRBS phase modulation offers a tunable method to increase the BI threshold in high-energy lasers.
    • A predictive model is developed, allowing estimation of BI threshold for higher PRBS orders based on lower-order results.
    • This research provides practical guidelines for selecting optimal PRBS parameters to maximize laser amplifier performance.