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GAIN MEDIUM [6 records]

Filter results by subject field Alphabetical list of terms

Filter results by subject field

Alphabetical list of terms

Record 1 2024-02-22

English

Subject field(s)
  • Lasers and Masers
CONT

Electrical pumping is another method of laser pumping; it involves passing an electric current through the gain medium to excite the atoms or molecules. This is the pumping mechanism used in virtually all gas lasers, where the flow of electricity through a low-pressure gas creates a plasma.

Key term(s)
  • electrical-discharge pumping

French

Domaine(s)
  • Masers et lasers
CONT

Pour provoquer l'émission laser, il faut exciter correctement un milieu actif afin de placer ses atomes, ses ions ou ses molécules dans des conditions telles qu'ils puissent libérer de l'énergie par émission stimulée. Cette excitation, appelée «pompage», peut se faire sous des formes différentes : - pompage électrique : décharge électrique dans un gaz avec excitation électronique, par exemple [...]

Spanish

Save record 1

Record 2 2024-01-27

English

Subject field(s)
  • Lasers and Masers
CONT

A solid-state laser is a laser that uses a gain medium that is a solid, rather than a liquid as in dye lasers or a gas as in gas lasers.

French

Domaine(s)
  • Masers et lasers
DEF

Laser dans lequel le milieu excité est un solide [...]

Spanish

Save record 2

Record 3 2013-12-10

English

Subject field(s)
  • Oscillators and Oscillating Circuits (Electronics)
  • Lasers and Masers
CONT

Analogously with an electrode oscillator the constituent components of the laser [are] a tuned circuit, a feedback system and a power supply.

CONT

In order to use... a [laser] medium as [an] optical oscillator, the optical gain arising from the inverted population must exceed the loss in the resonator... To accomplish this, the optical path through the laser material is made long in one direction, and highly reflecting mirrors are placed so that they send the light back and forth along the length of the material. The mirrors provide feedback... and thereby convert the optical amplifier into an optical oscillator. Oscillation than takes place only between the mirrors.

OBS

[A] laser ... is more an oscillator than an amplifier.

French

Domaine(s)
  • Circuits oscillants et oscillateurs (Électronique)
  • Masers et lasers
DEF

[...] combinaison d'un milieu matériel qu'un processus de pompage rend amplificateur, pour des ondes lumineuses [...] et d'un résonateur [...] fait de deux miroirs parallèles [...]

CONT

L'oscillateur laser. [...] Lorsqu'on augmente l'inversion de population [...], on atteint la valeur du gain qui permet à une onde de décrire des allers et retours dans la cavité en regagnant à chaque traversée du milieu amplificateur l'énergie qu'elle perd lors d'une réflexion.

OBS

Il semble qu'en français, on utilise fréquemment «oscillateur laser» alors qu'en anglais, on ne précise pas autant la notion. On voit parfois «laser as oscillator».

Spanish

Save record 3

Record 4 2012-03-07

English

Subject field(s)
  • Lasers and Masers
DEF

The amplification of spontaneously emitted radiation in a gain medium, characterized by moderate line narrowing and moderate directionality.

French

Domaine(s)
  • Masers et lasers
DEF

Émission lumineuse due à une augmentation de l'intensité d'un rayonnement issu d'une émission spontanée dans un milieu amplificateur.

CONT

le laser fonctionne en superradiance.

Spanish

Campo(s) temático(s)
  • Láser y máser
DEF

Amplificación de la emisión espontánea en un medio de ganancia, caracterizada por un estrechamiento de línea moderado y una moderada direccionalidad.

Save record 4

Record 5 2004-02-17

English

Subject field(s)
  • Lasers and Masers
DEF

The condition of a maser or laser wherein the gain of its medium is just sufficient to permit the start of oscillation.

French

Domaine(s)
  • Masers et lasers

Spanish

Campo(s) temático(s)
  • Láser y máser
Save record 5

Record 6 1986-08-29

English

Subject field(s)
  • Lasers and Masers
DEF

It consists of a reflecting mirror(spatula) and a phase-conjugate minor(crystal at beam intersection). It requires no amplifying medium because the phase-conjugate mirror provides the necessary gain.

French

Domaine(s)
  • Masers et lasers

Spanish

Save record 6

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