Low power laser driver

H - Electricity – 01 – S

Patent

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Details

H01S 5/00 (2006.01) H01S 5/042 (2006.01)

Patent

CA 2428590

A laser driver circuit includes an injection laser diode. A current source control loop circuit is connected to the injection laser diode and establishes a fixed current though the injection laser diode. A voltage switcher circuit and adapted to receive a fixed supply voltage and convert inductively the supply voltage down to a forward voltage to bias the injection laser diode and produce an optical fiber coupled laser output having minimized power losses.

L'invention concerne un circuit d'attaque de laser comprenant une diode laser à injection. Un circuit à boucle de régulation de source de courant est connecté à la diode laser à injection et établit un courant fixe au moyen de cette diode laser à injection. Un circuit de commutation de tension est connecté à la diode laser à injection et au circuit à boucle de régulation de source de courant. Par ailleurs, ledit circuit de commutation est conçu pour recevoir une tension d'alimentation fixe et pour abaisser de manière inductive la tension d'alimentation à une tension directe de manière à polariser la diode laser à injection et à produire une sortie laser couplée à une fibre optique présentant des pertes de puissance minimales.

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