Rinne foireann Oileán na hEolaíochta dul chun cinn i dteicneolaíocht lascadh Q-lasair litiam niobate ard-éifeachtúlachta lár-infridhearg
Le déanaí, chomhoibrigh grúpa taighde Jiang Haihe, taighdeoir ag Saotharlann Teicneolaíochta Léasair Leighis na hInstitiúide Sláinte, Institiúid Taighde Hefei in Acadamh Eolaíochtaí na Síne, le Grúpa Teicneolaíochta Leictreonaic na Síne, agus rinne sé dul chun cinn tábhachtach i dtaighde acousto- teicneolaíocht optúil Q-athrú sa bhanna lár-infridhearg: den chéad uair, tá criostail litiam niobate (LiNbO3) réadaithe. Lasca fuaimiúla snáthoptaice agus a n-aschur ardéifeachtúlachta lasc-Q i léasair 2.79 μm Er,Cr:YSGG. Foilsíodh torthaí ábhartha san iris optúil idirnáisiúnta 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).
