Polarization switching of an er :yb :cr: phosphate glass microchip laser
Tóm tắt
We show that the light of a commercially available Er:Yb:Cr.-phosphate glass microchip laser end-pumped at 977 nm by an InGaAs laser diode can be switched between two linear polarization eigenstates when it is submitted to a polarized optical feedback. The flip occurs when the feedback phase is scanned by the external cavity length. In our experiments the laser diode light is confined to a fiber which is single-mode at pumping wavelength and the microchip laser operates in a single-longitudinal-and transverse mode. The microchip laser exhibits a self-pulsing behavior. La lumiére d’un microlaser commercialise de verre phosphaté codopé Er:Yb:Cr et pompé par une diode laser à 977 nm, peut commuter entre deux états de pola-risation perpendiculaires sous L’action d’une rétroac-tion optique polarisée. Le saut de polarisation apparaĹt quand la phase du champ de rétroaction est balayée par des variations de la longueur de la cavite externe. Dans les expériences, le champ de la diode est confiné dans une fibre optique monomode à la longueur d’onde de pompe et le microlaser est également monomode trans-verse et longitudinal. On observe un comportement auto-impulsionnel du laser.
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