Das Science-Island-Team erzielte Fortschritte bei der hocheffizienten Lithiumniobat-Q-Switching-Technologie für Laser im mittleren Infrarotbereich
Kürzlich hat die Forschungsgruppe von Jiang Haihe, einem Forscher am Medical Laser Technology Laboratory des Institute of Health, Hefei Research Institute der Chinese Academy of Sciences, mit der China Electronics Technology Group zusammengearbeitet und wichtige Fortschritte in der Erforschung von Akusto- optische Q-Switching-Technologie im mittleren Infrarotbereich: Erstmals wurden Kristalle aus Lithiumniobat (LiNbO3) realisiert. Akusto-optische Schalter und ihr hocheffizienter gütegeschalteter Ausgang in 2,79-μm-Er,Cr:YSGG-Lasern. Entsprechende Ergebnisse wurden in der internationalen Fachzeitschrift Optics Letters veröffentlicht.
Lithium niobate crystal is a traditional multifunctional crystal. In recent years, lithium niobate thin-film photonic devices with extremely low optical loss and rich photoelectric functions have developed rapidly. Lithium niobate is expected to replace silicon materials in the field of integrated photonics. Problems provide solutions. Since the discovery of lithium niobate crystal in 1937, although it has good acousto-optic properties and has been used as a transducer material for a long time, it has not been able to realize the laser acousto-optic Q-switching switch of bulk crystals. This research has realized the homogeneity and integration of the acousto-optic medium and the transducer, which can simplify the manufacturing process, reduce the auxiliary cost, and also reduce the loss of ultrasonic energy, so that the diffraction efficiency of the lithium niobate Q-switch can reach 57%. And the lithium niobate crystal has a high damage resistance threshold (>200 MW/cm2).
