Ekipa Science Island je napredovala pri tehnologiji Q-preklopa z visokoučinkovitim litijevim niobatom srednjega infrardečega laserja
Pred kratkim je raziskovalna skupina Jianga Haiheja, raziskovalca v Laboratoriju za medicinsko lasersko tehnologijo Inštituta za zdravje, raziskovalnega inštituta Hefei Kitajske akademije znanosti, sodelovala s skupino China Electronics Technology Group in dosegla pomemben napredek pri raziskavah akustičnih optična tehnologija Q-preklopa v srednjem infrardečem pasu: prvič so bili realizirani kristali litijevega niobata (LiNbO3). Akustooptična stikala in njihov visoko učinkovit Q-preklopni izhod v 2,79 μm Er,Cr:YSGG laserjih. Ustrezni rezultati so bili objavljeni v mednarodni optični reviji Optics Letters.
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).
