Tim Znanstvenog otoka napredovao je u tehnologiji Q-sklopke visokoučinkovitog litij niobata srednjeg infracrvenog lasera
Nedavno je istraživačka skupina Jianga Haihea, istraživača u Laboratoriju za medicinsku lasersku tehnologiju Instituta za zdravlje Hefei istraživačkog instituta Kineske akademije znanosti, surađivala s China Electronics Technology Group i postigla važan napredak u istraživanju akusto- optička Q-switching tehnologija u srednjem infracrvenom pojasu: po prvi put su realizirani kristali litij niobata (LiNbO3). Akustično-optičke sklopke i njihov visokoučinkoviti izlaz Q-sklopke u 2,79 μm Er,Cr:YSGG laserima. Relevantni rezultati objavljeni su u međunarodnom optičkom časopisu 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).
