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

Generation of Three-Phase Voltage01:21

Generation of Three-Phase Voltage

A three-phase AC generator has a rotor with a rotating magnet placed within the stator mounted with the stationary three-phase winding to generate three-phase voltages via mutual induction. These windings are evenly distributed around the inner circumference of the stator and are arranged 120 electrical degrees apart. Three-phase stator windings consist of three separate coils or groups of coils, known as phases, each connected in Y (star) configuration or Delta configuration.
As the rotor...
Phase-lead and Phase-lag Controllers01:22

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 filters, manage...
Time and frequency -Domain Interpretation of Phase-lead Control01:24

Time and frequency -Domain Interpretation of Phase-lead Control

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...
Generating Electromagnetic Radiations01:10

Generating Electromagnetic Radiations

The German physicist Heinrich Hertz (1857–1894) was the first to generate and detect certain types of electromagnetic waves in the laboratory. Starting in 1887, he performed a series of experiments that confirmed the existence of electromagnetic waves and verified that they travel at the speed of light. Hertz used an alternating-current RLC (resistor-inductor-capacitor) circuit that resonated at a known frequency and connected it to a loop of wire. High voltages induced across the gap in the...
Generator Voltage Control01:21

Generator Voltage Control

Generator voltage control is crucial for maintaining the stable operation of synchronous generators and wind turbines. In older models, a DC generator driven by the rotor delivers DC power to the rotor's field winding, and the power is transferred through slip rings and brushes. In the latest models, static or brushless exciters are used. Static exciters rectify AC power from the generator terminals and then transfer the DC power directly to the rotor. Brushless exciters, on the other hand, use...
Sequence Networks of Rotating Machines01:24

Sequence Networks of Rotating Machines

A Y-connected synchronous generator, grounded through a neutral impedance, is designed to produce balanced internal phase voltages with only positive-sequence components. The generator's sequence networks include a source voltage that is exclusively in the positive-sequence network. The sequence components of line-to-ground voltages at the generator terminals illustrate this configuration.
Zero-sequence current induces a voltage drop across the generator's neutral impedance and other...

You might also read

Related Articles

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

Sort by
Same author

Optical isolation via direction-dependent soliton routing in birefringent soft matter.

Optics letters·2022
Same author

Scalar and vector supermode solitons owing to competing nonlocal nonlinearities.

Optics express·2021
Same author

Optothermal vortex-solitons in liquid crystals.

Optics letters·2020
Same author

Vortex nematicons in planar cells.

Optics express·2020
Same author

Temperature control of nematicon trajectories.

Physical review. E·2020
Same author

Spatiospectral features of a soliton-assisted random laser in liquid crystals.

Optics letters·2019
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: Jun 25, 2026

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
09:23

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Published on: May 30, 2014

Engineered quasi-phase matching for multiple parametric generation.

Usman K Sapaev1, Gaetano Assanto

  • 1NooEL - Nonlinear Optics and OptoElectronics Lab, Department of Electronic Engineeringand CNISM - University "Roma Tre", Via della Vasca Navale 84, 00146 Rome - Italy.

Optics Express
|March 5, 2009
PubMed
Summary
This summary is machine-generated.

We present a fast numerical method for designing quasi-phase matched gratings to generate tailored laser pulses. This technique accounts for pump depletion, group velocity mismatch, and dispersion for simultaneous 2nd and 3rd harmonic generation.

More Related Videos

Generation and Coherent Control of Pulsed Quantum Frequency Combs
06:42

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

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

Related Experiment Videos

Last Updated: Jun 25, 2026

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators
09:23

Quantum State Engineering of Light with Continuous-wave Optical Parametric Oscillators

Published on: May 30, 2014

Generation and Coherent Control of Pulsed Quantum Frequency Combs
06:42

Generation and Coherent Control of Pulsed Quantum Frequency Combs

Published on: June 8, 2018

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

Area of Science:

  • Nonlinear optics
  • Laser physics
  • Materials science

Background:

  • Parametric processes are crucial for generating specific light frequencies.
  • Designing quasi-phase matched (QPM) gratings enables efficient nonlinear frequency conversion.
  • Controlling pulse profiles requires advanced design techniques considering various physical effects.

Purpose of the Study:

  • To develop a rapid and efficient numerical technique for designing arbitrary QPM lattices.
  • To enable parametric generation of single and multiple pulses with prescribed amplitude and phase profiles.
  • To analyze simultaneous 2nd and 3rd harmonic generation in QPM gratings under pump depletion.

Main Methods:

  • Development of a numerical technique for QPM lattice design.
  • Modeling of parametric generation from fundamental frequency excitation.
  • Inclusion of pump depletion, group velocity mismatch, and dispersion effects.
  • Analysis of simultaneous second and third harmonic generation.

Main Results:

  • A rapid and efficient numerical method for designing arbitrary QPM lattices.
  • Capability to generate pulses with any prescribed amplitude and phase profiles.
  • Successful examination of simultaneous 2nd and 3rd harmonic generation.
  • Consideration of group velocity mismatch and dispersion in the design.

Conclusions:

  • The developed numerical technique offers a powerful tool for designing QPM gratings for complex parametric processes.
  • The method allows for precise control over generated pulse characteristics.
  • The study provides insights into simultaneous harmonic generation, accounting for realistic physical effects.