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

Switching of BJT

Switching of BJT

Switching behavior in Bipolar Junction Transistors (BJTs) is a fundamental aspect utilized in various electronic circuits, particularly for digital logic applications like switches and amplifiers. In a typical switching circuit, a BJT alternates between cut-off and saturation modes, corresponding to the "off" and "on" states, respectively, thus behaving like an ideal switch.
Cut-off Mode ("Off" State): In this state, both the emitter-base and collector-base junctions are...

Passive Filters

Passive Filters

Passive filters are utilized to shape the frequency spectrum of signals across a diverse array of applications. These filters, using only passive elements like resistors (R), inductors (L), and capacitors (C), are capable of selectively allowing or blocking certain frequency ranges without the need for external power sources.
Low-Pass Filters
Low-pass filters are designed to transmit signals with frequencies lower than the cutoff frequency, ωc, and attenuate those above it. The cutoff...

ATP Driven Pumps III: V-type Pumps

ATP Driven Pumps III: V-type Pumps

V-type pumps are ATP-driven pumps found in the vacuolar membranes of plants, yeast, endosomal and lysosomal membranes of animal cells, plasma membranes of a few specialized eukaryotic cells, and some prokaryotes. They are also known as the V1Vo-ATPase, that couple ATP hydrolysis to transport protons against a concentration gradient.
The peripheral or cytosolic V1 domain with eight subunits is involved in ATP hydrolysis. The integral or transmembrane V0 domain containing at least five subunits...

ATP Driven Pumps II: P-type Pumps

ATP Driven Pumps II: P-type Pumps

The P-type pumps are a large family of integral membrane transporter ATPases. They are divided into five major types based on substrate specificity, from I to V.
A typical P-type pump has three cytosolic domains: nucleotide-binding (N), phosphorylation (P), and activator (A) domains. These domains are connected to the membrane-spanning helices by short amino acid segments. ATP hydrolysis and covalent phosphoenzyme intermediate formation are crucial parts of the catalytic cycle. At the highly...

Active versus Passive Immunity

Active versus Passive Immunity

Immunity, along with the ability to limit pathogen growth to prevent significant body tissue damage, can be gained either by (1) actively developing an immune response within the individual after exposure to a pathogen or after getting vaccinated or (2) passively transferring immune components from an immune individual to one who is nonimmune. Both these forms of immunity can be found naturally and in medical practices.
Active Immunity
Active immunity refers to the resistance one develops...

Pumped Concrete

Pumped Concrete

Concrete in large quantities can be pumped across long distances for placing in inaccessible sites. This system comprises a hopper that receives concrete from a mixer, a pump to propel the concrete, and pipelines that facilitate its delivery.
For direct-acting pumps, the concrete enters the pump via the inlet valve under the action of gravity and suction created by the movement of the piston. This concrete is then forced into the pipeline and out through the outlet valve by the forward movement...

You might also read

Related Articles

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

Sort by

Same author

Energy scaling and propagation properties of Laguerre-Gauss modes in gas-filled multipass cells.

Optics express·2026

Same author

UV electro-optic frequency comb hybrid fiber/bulk laser system for molecular wind lidar.

Optics express·2026

Same author

Low-noise generation of UV dispersive waves at 100 kHz.

Optics letters·2026

Same author

Indirectly LED-pumped Nd:glass regenerative amplifier.

Optics express·2026

Same author

Passively Q-switched Tm:YLF laser at 2.3 µm: instability analysis and stabilization.

Optics letters·2026

Same author

Coherent beam combining strategies for high-energy and high-repetition rate lasers dedicated to inertial nuclear fusion applications.

Optics express·2025

Search research articles

Related Experiment Video

Updated: Feb 5, 2026

High Speed Droplet-based Delivery System for Passive Pumping in Microfluidic Devices

High Speed Droplet-based Delivery System for Passive Pumping in Microfluidic Devices

Published on: September 2, 2009

LED-pumped passively Q-switched Cr:LiSAF laser.

Pierre Pichon, Frédéric Druon, Jean-Philippe Blanchot

|September 14, 2018

Summary

Researchers developed the first light-emitting diode (LED)-pumped Cr:LiSAF laser. This novel laser system operates in quasi-continuous-wave and passively Q-switched modes, offering efficient visible light pumping for advanced laser applications.

More Related Videos

LED Thermo Flow — Combining Optogenetics with Flow Cytometry

LED Thermo Flow — Combining Optogenetics with Flow Cytometry

Published on: December 30, 2016

Using Affordable LED Arrays for Photo-Stimulation of Neurons

Using Affordable LED Arrays for Photo-Stimulation of Neurons

Published on: November 15, 2011

Related Experiment Videos

Last Updated: Feb 5, 2026

High Speed Droplet-based Delivery System for Passive Pumping in Microfluidic Devices

High Speed Droplet-based Delivery System for Passive Pumping in Microfluidic Devices

Published on: September 2, 2009

LED Thermo Flow — Combining Optogenetics with Flow Cytometry

LED Thermo Flow — Combining Optogenetics with Flow Cytometry

Published on: December 30, 2016

Using Affordable LED Arrays for Photo-Stimulation of Neurons

Using Affordable LED Arrays for Photo-Stimulation of Neurons

Published on: November 15, 2011

Area of Science:

Laser Physics
Solid-State Lasers
Optoelectronics

Background:

Development of efficient and compact laser sources is crucial for various scientific and industrial applications.
Traditional laser pumping methods often involve complex and bulky systems.
Recent advancements in light-emitting diode (LED) technology offer potential for novel pumping schemes.

Purpose of the Study:

To report the first demonstration of a light-emitting diode (LED)-pumped Cr:LiSAF laser.
To investigate its performance in both quasi-continuous-wave (QCW) and passively Q-switched operations.
To explore the potential of LED-pumped luminescent concentrators (LCs) for visible light pumping.

Main Methods:

Utilizing blue LEDs integrated with Ce:YAG luminescent concentrators (LCs) to generate high-irradiance visible light.
Pumping a Cr:LiSAF laser medium with the developed LED-LC pump source.
Characterizing the laser output in QCW operation, including pulse energy and gain.
Investigating wavelength tunability.
Implementing a passively Q-switched oscillator using a Cr:YAG saturable absorber.

Main Results:

Achieved 8.4 mJ pulse energy at 850 nm in QCW operation (250 μs pulses at 10 Hz).
Demonstrated a small signal gain per roundtrip of 1.44 at 850 nm.
Observed wavelength tunability from 810 nm to 960 nm.
Obtained 3.1 kW peak power with 130 μJ pulse energy and 41.6 ns duration in passively Q-switched operation.

Conclusions:

The successful demonstration of an LED-pumped Cr:LiSAF laser marks a significant advancement in laser technology.
The combination of high-density blue LEDs and Ce:YAG LCs provides an effective and efficient visible pump source.
This approach offers a compact and potentially cost-effective alternative for various laser applications requiring tunable solid-state lasers.