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THRESHOLD CURRENT DENSITY [1 record]

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Record 1 2012-04-17

English

Subject field(s)
  • Lasers and Masers
CONT

The current threshold for lasing in GaAs is strongly temperature-dependent, ... At low temperature (up to approximately 30 °K) the threshold is fairly constant. Above 100 °K, the threshold current density for laser operation increases rapidly with increasing temperature.

French

Domaine(s)
  • Masers et lasers
DEF

Densité minimale de courant électrique nécessaire pour provoquer un effet laser à une température spécifique.

CONT

L'avantage des lasers à points quantiques tiendrait à une nette augmentation d'intensité en fonction du courant d'excitation. Les meilleurs résultats jusqu'à ce jour, qui ne font toujours pas l'unanimité, indiquent qu'un laser à PQ d'InGaAs sur GaAAs, fonctionnant à une température de 77 K, présente une densité de courant de seuil de 120 A/cm2, soit environ cinq fois le rendement à température ambiante des lasers à puits quantiques actuels les plus perfectionnés.

Spanish

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