It-tim tal-Gżira tax-Xjenza għamel progress fit-teknoloġija tal-Q-switching tal-litju niobate tal-lithium b'effiċjenza għolja tal-laser infra-aħmar medju
Riċentement, il-grupp ta 'riċerka ta' Jiang Haihe, riċerkatur fil-Laboratorju tat-Teknoloġija Medika tal-Laser tal-Istitut tas-Saħħa, Istitut tar-Riċerka Hefei tal-Akkademja tax-Xjenzi Ċiniża, ikkoopera maċ-Ċina Electronics Technology Group, u għamel progress importanti fir-riċerka tal-acousto- Teknoloġija ottika Q-switching fil-medda ta 'l-infra-aħmar tan-nofs: għall-ewwel darba, ġew realizzati kristalli tal-litju niobate (LiNbO3). Swiċċijiet akusto-ottiċi u l-output Q-switched ta 'effiċjenza għolja tagħhom f'2.79 μm Er, Cr: lasers YSGG. Riżultati rilevanti ġew ippubblikati fil-ġurnal ottiku internazzjonali 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/ċm2).
