Related Experiment Video
Updated: Jul 2, 2026
10:52
Direct Imaging of Laser-driven Ultrafast Molecular Rotation
Published on: February 4, 2017
9.7K
Highly versatile, two-color setup for high-order harmonic generation using spatial light modulators
A-K Raab1, M Schmoll2, E R Simpson1
1Department of Physics, Lund University, P.O. Box 118, 22100 Lund, Sweden.
The Review of Scientific Instruments
|July 16, 2024
Summary
We developed a new two-color high-order harmonic generation setup using a femtosecond laser. This system allows precise control over laser parameters for advanced studies in ultrafast science.
Area of Science:
- Physics
- Ultrafast Science
- Nonlinear Optics
Background:
- High-order harmonic generation (HHG) is a key process for producing extreme ultraviolet (XUV) and soft X-ray radiation.
- Two-color HHG, utilizing fundamental and second harmonic laser fields, offers enhanced control over the generated harmonic spectra.
- Precise control over the relative spatio-temporal properties of the two colors is crucial for optimizing HHG yields and spectral characteristics.
Purpose of the Study:
- To present a novel, highly controllable, interferometric two-color high-order harmonic generation (HHG) setup.
- To enable automated, multi-parameter scans for optimizing HHG processes.
- To provide real-time feedback for experimental stability and control.
Main Methods:
- Utilizing a turn-key Ytterbium-doped femtosecond laser and its second harmonic.
- Employing an interferometric design with spatial light modulators (SLMs) in each arm.
- Implementing independent control over relative delay, power, and focusing geometries of the two color beams.
- Integrating a live diagnostics system for continuous monitoring.
Main Results:
- Demonstration of a stable and versatile two-color HHG apparatus.
- Capability for precise manipulation of spatial beam profiles and temporal delay.
- Facilitation of automated scans for optimizing HHG parameters.
- Real-time monitoring ensures experimental stability and reproducibility.
Conclusions:
- The developed setup offers unprecedented control for two-color HHG experiments.
- This platform is suitable for advanced investigations in ultrafast science and attosecond physics.
- The automated scanning and live diagnostics pave the way for efficient experimental optimization and discovery.
More Related Videos
Related Concept Videos
02:12The Wave Nature of Light
The nature of light has been a subject of inquiry since antiquity. In the seventeenth century, Isaac Newton performed experiments with lenses and prisms and was able to demonstrate that white light consists of the individual colors of the rainbow combined together. Newton explained his optics findings in terms of a "corpuscular" view of light, in which light was composed of streams of extremely tiny particles traveling at high speeds according to Newton's laws of motion.
01:10Wave Parameters
The simplest mechanical waves are associated with simple harmonic motion and repeat themselves for several cycles. These simple harmonic waves can be modeled using a combination of sine and cosine functions. Consider a simplified surface water wave that moves across the water's surface. Unlike complex ocean waves, in surface water waves, water moves vertically, oscillating up and down, whereas the disturbance of the wave moves horizontally through the medium. If a seagull is floating on the...
01:17Design Example: Vintage Mixing Console
A sound engineer at a music company recently encountered a problem. The output from their newly acquired studio's vintage mixing console was too low for the requirements of modern recording equipment. To rectify this situation, the engineer decided to design an audio pre-amplifier using an operational amplifier (op-amp) to boost the signal level.
The specifications for the pre-amplifier were clear. It needed to amplify the audio signal by a factor of 10, have an input impedance above 10...
The specifications for the pre-amplifier were clear. It needed to amplify the audio signal by a factor of 10, have an input impedance above 10...
01:23Design Example
The innovation of touch-tone telephony revolutionized the telecommunications industry by replacing the traditional rotary dial with a dual-tone multi-frequency (DTMF) signaling system. This system uses a matrix-style keypad with buttons arranged in four rows and three columns, creating 12 distinct signals each assigned to a pair of frequencies. Each button press results in a simultaneous generation of two sinusoidal tones – one from a low-frequency group (697 to 941 Hz) and one from a...
01:28Load-frequency control
Load-frequency control (LFC) is vital for maintaining power system stability, ensuring that frequency and power flows remain within acceptable limits during load changes. Turbine-governor control eliminates rotor accelerations and decelerations following load changes. However, a steady-state frequency error persists when the change in the turbine-governor reference setting is zero. In an interconnected power system, each area agrees to export or import a scheduled amount of power through...
01:24Color Vision
Color perception begins in the retina, the light-sensitive layer at the back of the eye. Two main theories explain how colors are seen: the trichromatic theory and the opponent-process theory. The trichromatic theory, proposed by Thomas Young in 1802 and extended by Hermann von Helmholtz in 1852, suggests that color vision is based on three types of cone receptors in the retina. These cones are sensitive to different but overlapping ranges of wavelengths corresponding to red, blue, and green.