Science Island-teamet gjorde fremskridt inden for mellem-infrarød laser højeffektiv lithium niobate Q-switching-teknologi
For nylig samarbejdede forskergruppen af Jiang Haihe, en forsker ved Medical Laser Technology Laboratory ved Institute of Health, Hefei Research Institute ved det kinesiske videnskabsakademi, med China Electronics Technology Group og gjorde vigtige fremskridt i forskningen i akustik- optisk Q-switching-teknologi i det mellem-infrarøde bånd: For første gang er lithiumniobat (LiNbO3) krystaller blevet realiseret. Akusto-optiske kontakter og deres højeffektive Q-switchede output i 2,79 μm Er,Cr:YSGG-lasere. Relevante resultater er publiceret i det internationale optiske tidsskrift 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).
