Broadening the linewidth of a semiconductor laser

Details Broadening the linewidth of a semiconductor laser Broadening the linewidth of a semiconductor laser

H - Electricity

01

S

H01S 5/062 (2006.01) G02B 6/10 (2006.01) H01S 5/06 (2006.01) H01S 5/065 (2006.01)

Patent

CA 2371002

The invention is directed to a system and a method for controllably broadening the spectral characteristics, such as the emission linewidth, of a semiconductor laser (24) by discharging an electric pulse, for example, a charged transmission line (20), across the laser terminals. The linewidth- broadened lasers find application in fiber optic sensors, such as fiber optic gyroscopes and current sensors, which have a relatively short de-coherence length.

Cette invention concerne un système et un procédé permettant d'élargir de façon maîtrisée les caractéristiques spectrales, telles que la largeur de ligne d'émission, d'un laser à semi-conducteurs (24). La démarche consiste à décharger une impulsion électrique, par exemple une ligne de transmission (20) chargée, entre les bornes du laser. Ces lasers à largeur de ligne élargie peuvent s'utiliser dans des détecteurs optiques à fibre, tels que des gyroscopes et des détecteurs de courant optiques à fibre, dont la longueur de dé-cohérence est relativement courte.

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